nytprof run results of /variantgraph/<ID> and /relation/<ID>/relationships
[scpubgit/stemmatology.git] / stemmaweb / nytprof-runs / relation-uuid-relationships / XSLoader-pm-681-sub.html
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3<!--
4This file was generated by Devel::NYTProf version 4.06
5-->
6<head>
7 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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9 <title>Profile of XSLoader.pm</title>
10<link rel="stylesheet" type="text/css" href="style.css" />
11 <script type="text/javascript" src="js/jquery-min.js"></script>
12
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14 <link rel="stylesheet" type="text/css" href="js/style-tablesorter.css" />
15 <script type="text/javascript">
16 // when a column is first clicked on to sort it, use descending order
17 // XXX doesn't seem to work (and not just because the tablesorter formatSortingOrder() is broken)
18 $.tablesorter.defaults.sortInitialOrder = "desc";
19 // add parser through the tablesorter addParser method
20 $.tablesorter.addParser({
21 id: 'fmt_time', // name of this parser
22 is: function(s) {
23 return false; // return false so this parser is not auto detected
24 },
25 format: function(orig) { // format data for normalization
26 // console.log(orig);
27 val = orig.replace(/ns/,'');
28 if (val != orig) { return val / (1000*1000*1000); }
29 val = orig.replace(/µs/,''); /* XXX use &micro; ? */
30 if (val != orig) { return val / (1000*1000); }
31 var val = orig.replace(/ms/,'');
32 if (val != orig) { return val / (1000); }
33 var val = orig.replace(/s/,'');
34 if (val != orig) { return val; }
35 if (orig == '0') { return orig; }
36 console.log('no match for fmt_time of '.concat(orig));
37 return orig;
38 },
39 type: 'numeric' // set type, either numeric or text
40 });
41 </script>
42</head>
43
44<body >
45<div class="header" style="position: relative; overflow-x: hidden; overflow-y: hidden; z-index: 0; ">
46<div class="header_back">
47 <a href="index.html">&larr; Index</a>
48 </div>
49<div class="headerForeground" style="float: left">
50 <span class="siteTitle">NYTProf Performance Profile</span>
51 <span class="siteSubtitle">&emsp;&emsp;<span>&laquo;&emsp;<span class="mode_btn"><a href="XSLoader-pm-681-block.html">block view</a></span>&emsp;&bull;&emsp;<span class="mode_btn"><a href="XSLoader-pm-681-line.html">line view</a></span>&emsp;&bull;&emsp;<span class="mode_btn mode_btn_selected">sub view</span>&emsp;&raquo;</span><br />
52 For script/nytprof.pl
53 </span>
54</div>
55<div class="headerForeground" style="float: right; text-align: right">
56 <span class="siteTitle">&nbsp;</span>
57 <span class="siteSubtitle">Run on Thu May 31 16:49:15 2012<br />Reported on Thu May 31 16:50:46 2012</span>
58</div>
59<div style="position: absolute; left: 0px; top: 0%; width: 100%; height: 101%; z-index: -1; background-color: rgb(17, 136, 255); "></div>
60<div style="position: absolute; left: 0px; top: 2%; width: 100%; height: 99%; z-index: -1; background-color: rgb(16, 134, 253); "></div>
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71<div style="position: absolute; left: 0px; top: 24%; width: 100%; height: 77%; z-index: -1; background-color: rgb(12, 119, 238); "></div>
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74<div style="position: absolute; left: 0px; top: 30%; width: 100%; height: 71%; z-index: -1; background-color: rgb(11, 115, 234); "></div>
75<div style="position: absolute; left: 0px; top: 32%; width: 100%; height: 69%; z-index: -1; background-color: rgb(11, 114, 233); "></div>
76<div style="position: absolute; left: 0px; top: 34%; width: 100%; height: 67%; z-index: -1; background-color: rgb(11, 112, 231); "></div>
77<div style="position: absolute; left: 0px; top: 36%; width: 100%; height: 65%; z-index: -1; background-color: rgb(10, 111, 230); "></div>
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84<div style="position: absolute; left: 0px; top: 50%; width: 100%; height: 51%; z-index: -1; background-color: rgb(8, 102, 221); "></div>
85<div style="position: absolute; left: 0px; top: 52%; width: 100%; height: 49%; z-index: -1; background-color: rgb(8, 100, 219); "></div>
86<div style="position: absolute; left: 0px; top: 54%; width: 100%; height: 47%; z-index: -1; background-color: rgb(7, 99, 218); "></div>
87<div style="position: absolute; left: 0px; top: 56%; width: 100%; height: 45%; z-index: -1; background-color: rgb(7, 97, 216); "></div>
88<div style="position: absolute; left: 0px; top: 58%; width: 100%; height: 43%; z-index: -1; background-color: rgb(7, 96, 215); "></div>
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93<div style="position: absolute; left: 0px; top: 68%; width: 100%; height: 33%; z-index: -1; background-color: rgb(5, 89, 208); "></div>
94<div style="position: absolute; left: 0px; top: 70%; width: 100%; height: 31%; z-index: -1; background-color: rgb(5, 88, 207); "></div>
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96<div style="position: absolute; left: 0px; top: 74%; width: 100%; height: 27%; z-index: -1; background-color: rgb(4, 85, 204); "></div>
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98<div style="position: absolute; left: 0px; top: 78%; width: 100%; height: 23%; z-index: -1; background-color: rgb(3, 82, 201); "></div>
99<div style="position: absolute; left: 0px; top: 80%; width: 100%; height: 21%; z-index: -1; background-color: rgb(3, 81, 200); "></div>
100<div style="position: absolute; left: 0px; top: 82%; width: 100%; height: 19%; z-index: -1; background-color: rgb(3, 80, 199); "></div>
101<div style="position: absolute; left: 0px; top: 84%; width: 100%; height: 17%; z-index: -1; background-color: rgb(2, 78, 197); "></div>
102<div style="position: absolute; left: 0px; top: 86%; width: 100%; height: 15%; z-index: -1; background-color: rgb(2, 77, 196); "></div>
103<div style="position: absolute; left: 0px; top: 88%; width: 100%; height: 13%; z-index: -1; background-color: rgb(2, 76, 195); "></div>
104<div style="position: absolute; left: 0px; top: 90%; width: 100%; height: 11%; z-index: -1; background-color: rgb(1, 74, 193); "></div>
105<div style="position: absolute; left: 0px; top: 92%; width: 100%; height: 9%; z-index: -1; background-color: rgb(1, 73, 192); "></div>
106<div style="position: absolute; left: 0px; top: 94%; width: 100%; height: 7%; z-index: -1; background-color: rgb(1, 72, 191); "></div>
107<div style="position: absolute; left: 0px; top: 96%; width: 100%; height: 5%; z-index: -1; background-color: rgb(0, 70, 189); "></div>
108<div style="position: absolute; left: 0px; top: 98%; width: 100%; height: 3%; z-index: -1; background-color: rgb(0, 69, 188); "></div>
109<div style="position: absolute; left: 0px; top: 100%; width: 100%; height: 1%; z-index: -1; background-color: rgb(0, 68, 187); "></div>
110</div>
111
112<div class="body_content"><br />
113<table class="file_summary"><tr><td class="h">Filename</td><td align="left"><a href="file:///Users/edenc/perl5/lib/perl5/darwin-multi-2level/XSLoader.pm">/Users/edenc/perl5/lib/perl5/darwin-multi-2level/XSLoader.pm</a></td></tr>
114<tr><td class="h">Statements</td><td align="left">Executed 2 statements in 56&micro;s</td></tr></table>
115
116 <table id="subs_table" border="1" cellpadding="0" class="tablesorter">
117 <caption>Subroutines</caption>
118 <thead>
119 <tr>
120 <th>Calls</th>
121 <th><span title="Number of Places sub is called from">P</span></th>
122 <th><span title="Number of Files sub is called from">F</span></th>
123 <th>Exclusive<br />Time</th>
124 <th>Inclusive<br />Time</th>
125 <th>Subroutine</th>
126 </tr>
127 </thead>
128 <tbody>
129<tr><td class="c3">30</td><td class="c3">30</td><td class="c3">30</td><td class="c3"><span title="0.0%">11.8ms</span></td><td class="c3"><span title="0.0%">11.9ms</span></td><td class="sub_name"><span style="display: none;">XSLoader::::load</span>XSLoader::<a href="XSLoader-pm-681-sub.html#20">load</a></span></td></tr>
130<tr><td class="c3">0</td><td class="c3">0</td><td class="c3">0</td><td class="c3"><span title="0.0%">0s</span></td><td class="c3"><span title="0.0%">0s</span></td><td class="sub_name"><span style="display: none;">XSLoader::::bootstrap_inherit</span>XSLoader::<a href="XSLoader-pm-681-sub.html#101">bootstrap_inherit</a></span></td></tr>
131</tbody></table>
132 Call graph for these subroutines as a
133 <a href="http://en.wikipedia.org/wiki/Graphviz">Graphviz</a>
134 <a href="Users-edenc-perl5-lib-perl5-darwin-multi-2level-XSLoader-pm.dot">dot language file</a>.
135
136 <table border="1" cellpadding="0">
137 <thead>
138 <tr><th>Line</th>
139 <th><span title="Number of statements executed">State<br />ments</span></th>
140 <th><span title="Time spend executing statements on the line,
141 excluding time spent executing statements in any called subroutines">Time<br />on line</span></th>
142 <th><span title="Number of subroutines calls">Calls</span></th>
143 <th><span title="Time spent in subroutines called (inclusive)">Time<br />in subs</span></th>
144 <th class="left_indent_header">Code</th>
145 </tr>
146
147 </thead>
148 <tbody>
149 <tr><td class="h"><a name="1"></a>1</td><td></td><td></td><td></td><td></td><td class="s"># Generated from XSLoader.pm.PL (resolved %Config::Config value)</td></tr>
150<tr><td class="h"><a name="2"></a>2</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
151<tr><td class="h"><a name="3"></a>3</td><td></td><td></td><td></td><td></td><td class="s">package XSLoader;</td></tr>
152<tr><td class="h"><a name="4"></a>4</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
153<tr><td class="h"><a name="5"></a>5</td><td></td><td></td><td></td><td></td><td class="s">$VERSION = &quot;0.15&quot;;</td></tr>
154<tr><td class="h"><a name="6"></a>6</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
155<tr><td class="h"><a name="7"></a>7</td><td></td><td></td><td></td><td></td><td class="s">#use strict;</td></tr>
156<tr><td class="h"><a name="8"></a>8</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
157<tr><td class="h"><a name="9"></a>9</td><td></td><td></td><td></td><td></td><td class="s"># enable debug/trace messages from DynaLoader perl code</td></tr>
158<tr><td class="h"><a name="10"></a>10</td><td></td><td></td><td></td><td></td><td class="s"># $dl_debug = $ENV{PERL_DL_DEBUG} || 0 unless defined $dl_debug;</td></tr>
159<tr><td class="h"><a name="11"></a>11</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
160<tr><td class="h"><a name="12"></a>12</td><td></td><td></td><td></td><td></td><td class="s">package DynaLoader;</td></tr>
161<tr><td class="h"><a name="13"></a>13</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
162<tr><td class="h"><a name="14"></a>14</td><td></td><td></td><td></td><td></td><td class="s"># No prizes for guessing why we don't say 'bootstrap DynaLoader;' here.</td></tr>
163<tr><td class="h"><a name="15"></a>15</td><td></td><td></td><td></td><td></td><td class="s"># NOTE: All dl_*.xs (including dl_none.xs) define a dl_error() XSUB</td></tr>
164<tr><td class="h"><a name="16"></a>16</td><td></td><td></td><td></td><td></td><td class="s">boot_DynaLoader('DynaLoader') if defined(&amp;boot_DynaLoader) &amp;&amp;</td></tr>
165<tr><td class="h"><a name="17"></a>17</td><td></td><td></td><td></td><td></td><td class="s"> !defined(&amp;dl_error);</td></tr>
166<tr><td class="h"><a name="18"></a>18</td><td></td><td></td><td></td><td></td><td class="s">package XSLoader;</td></tr>
167<tr><td class="h"><a name="19"></a>19</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
168<tr><td class="h"><a name="20"></a>20</td><td></td><td></td><td></td><td></td><td class="s"><div class="calls"><div class="calls_in"># spent 11.9ms (11.8+94&micro;s) within XSLoader::load which was called 30 times, avg 397&micro;s/call:
169# once (995&micro;s+6&micro;s) by Hash::Util::FieldHash::Compat::BEGIN@8 at <a href="Hash-Util-FieldHash-pm-1535-sub.html#29">line 29 of Hash/Util/FieldHash.pm</a>
170# once (822&micro;s+0s) by B::BEGIN@17 at <a href="B-pm-165-sub.html#27">line 27 of B.pm</a>
171# once (597&micro;s+0s) by IPC::Run::Debug::BEGIN@2 at <a href="POSIX-pm-736-sub.html#36">line 36 of POSIX.pm</a>
172# once (527&micro;s+30&micro;s) by Text::Tradition::Collation::BEGIN@3 at <a href="Encode-pm-687-sub.html#10">line 10 of Encode.pm</a>
173# once (547&micro;s+0s) by Scope::Upper::BEGIN@195 at <a href="Scope-Upper-pm-1052-sub.html#197">line 197 of Scope/Upper.pm</a>
174# once (452&micro;s+59&micro;s) by JSON::BEGIN@2 at <a href="JSON-XS-pm-679-sub.html#1472">line 1472 of JSON/XS.pm</a>
175# once (503&micro;s+0s) by IO::Socket::BEGIN@12 at <a href="Socket-pm-485-sub.html#808">line 808 of Socket.pm</a>
176# once (416&micro;s+0s) by Safe::BEGIN@46 at <a href="Opcode-pm-726-sub.html#31">line 31 of Opcode.pm</a>
177# once (407&micro;s+0s) by IO::Handle::BEGIN@266 at <a href="IO-pm-39-sub.html#11">line 11 of IO.pm</a>
178# once (393&micro;s+0s) by Text::Tradition::Collation::RelationshipStore::BEGIN@7 at <a href="TryCatch-pm-905-sub.html#28">line 28 of TryCatch.pm</a>
179# once (392&micro;s+0s) by File::stat::BEGIN@30 at <a href="Fcntl-pm-27-sub.html#66">line 66 of Fcntl.pm</a>
180# once (382&micro;s+0s) by YAML::XS::BEGIN@19 at <a href="YAML-XS-LibYAML-pm-1505-sub.html#7">line 7 of YAML/XS/LibYAML.pm</a>
181# once (368&micro;s+0s) by PerlIO::import at <a href="PerlIO-scalar-pm-2519-sub.html#4">line 4 of PerlIO/scalar.pm</a>
182# once (359&micro;s+0s) by PPI::Util::BEGIN@7 at <a href="Digest-MD5-pm-916-sub.html#24">line 24 of Digest/MD5.pm</a>
183# once (354&micro;s+0s) by Catalyst::Controller::BEGIN@103 at <a href="attributes-pm-622-sub.html#101">line 101 of attributes.pm</a>
184# once (336&micro;s+0s) by Class::Accessor::Grouped::BEGIN@529 at <a href="Class-XSAccessor-pm-2181-sub.html#11">line 11 of Class/XSAccessor.pm</a>
185# once (334&micro;s+0s) by Variable::Magic::BEGIN@203 at <a href="Variable-Magic-pm-377-sub.html#205">line 205 of Variable/Magic.pm</a>
186# once (328&micro;s+0s) by Catalyst::Engine::BEGIN@9 at <a href="HTML-Parser-pm-1933-sub.html#17">line 17 of HTML/Parser.pm</a>
187# once (326&micro;s+0s) by Package::Stash::BEGIN@11 at <a href="Package-Stash-XS-pm-126-sub.html#17">line 17 of Package/Stash/XS.pm</a>
188# once (326&micro;s+0s) by main::BEGIN@7 at <a href="Storable-pm-57-sub.html#72">line 72 of Storable.pm</a>
189# once (314&micro;s+0s) by FindBin::BEGIN@98 at <a href="Cwd-pm-11-sub.html#248">line 248 of Cwd.pm</a>
190# once (305&micro;s+0s) by MRO::Compat::BEGIN@10 at <a href="mro-pm-85-sub.html#41">line 41 of mro.pm</a>
191# once (301&micro;s+0s) by Catalyst::Exception::Basic::BEGIN@3 at <a href="MooseX-Role-WithOverloading-pm-390-sub.html#21">line 21 of MooseX/Role/WithOverloading.pm</a>
192# once (297&micro;s+0s) by Moose::BEGIN@13 at <a href="List-Util-pm-64-sub.html#21">line 21 of List/Util.pm</a>
193# once (286&micro;s+0s) by English::BEGIN@148 at <a href="Tie-Hash-NamedCapture-pm-2009-sub.html#7">line 7 of Tie/Hash/NamedCapture.pm</a>
194# once (283&micro;s+0s) by Moose::Util::TypeConstraints::BEGIN@614 at <a href="re-pm-191-sub.html#85">line 85 of re.pm</a>
195# once (270&micro;s+0s) by Module::Runtime::require_module at <a href="Class-Load-XS-pm-78-sub.html#13">line 13 of Class/Load/XS.pm</a>
196# once (241&micro;s+0s) by Config::General::BEGIN@22 at <a href="File-Glob-pm-2011-sub.html#59">line 59 of File/Glob.pm</a>
197# once (240&micro;s+0s) by Graph::BEGIN@28 at <a href="Data-Dumper-pm-699-sub.html#36">line 36 of Data/Dumper.pm</a>
198# once (101&micro;s+0s) by Moose::Exporter::BEGIN@13 at <a href="Class-MOP-pm-83-sub.html#41">line 41 of Class/MOP.pm</a></div></div>sub load {</td></tr>
199<tr><td class="h"><a name="21"></a>21</td><td></td><td></td><td></td><td></td><td class="s"> package DynaLoader;</td></tr>
200<tr><td class="h"><a name="22"></a>22</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
201<tr><td class="h"><a name="23"></a>23</td><td></td><td></td><td></td><td></td><td class="s"> my ($module, $modlibname) = caller();</td></tr>
202<tr><td class="h"><a name="24"></a>24</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
203<tr><td class="h"><a name="25"></a>25</td><td></td><td></td><td></td><td></td><td class="s"> if (@_) {</td></tr>
204<tr><td class="h"><a name="26"></a>26</td><td></td><td></td><td></td><td></td><td class="s"> $module = $_[0];</td></tr>
205<tr><td class="h"><a name="27"></a>27</td><td></td><td></td><td></td><td></td><td class="s"> } else {</td></tr>
206<tr><td class="h"><a name="28"></a>28</td><td></td><td></td><td></td><td></td><td class="s"> $_[0] = $module;</td></tr>
207<tr><td class="h"><a name="29"></a>29</td><td></td><td></td><td></td><td></td><td class="s"> }</td></tr>
208<tr><td class="h"><a name="30"></a>30</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
209<tr><td class="h"><a name="31"></a>31</td><td></td><td></td><td></td><td></td><td class="s"> # work with static linking too</td></tr>
210<tr><td class="h"><a name="32"></a>32</td><td></td><td></td><td></td><td></td><td class="s"> my $boots = &quot;$module\::bootstrap&quot;;</td></tr>
211<tr><td class="h"><a name="33"></a>33</td><td></td><td></td><td></td><td></td><td class="s"> goto &amp;$boots if defined &amp;$boots;</td></tr>
212<tr><td class="h"><a name="34"></a>34</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
213<tr><td class="h"><a name="35"></a>35</td><td></td><td></td><td></td><td></td><td class="s"> goto \&amp;XSLoader::bootstrap_inherit unless $module and defined &amp;dl_load_file;</td></tr>
214<tr><td class="h"><a name="36"></a>36</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
215<tr><td class="h"><a name="37"></a>37</td><td></td><td></td><td></td><td></td><td class="s"> my @modparts = split(/::/,$module);</td></tr>
216<tr><td class="h"><a name="38"></a>38</td><td></td><td></td><td></td><td></td><td class="s"> my $modfname = $modparts[-1];</td></tr>
217<tr><td class="h"><a name="39"></a>39</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
218<tr><td class="h"><a name="40"></a>40</td><td></td><td></td><td></td><td></td><td class="s"> my $modpname = join('/',@modparts);</td></tr>
219<tr><td class="h"><a name="41"></a>41</td><td></td><td></td><td></td><td></td><td class="s"> my $c = @modparts;</td></tr>
220<tr><td class="h"><a name="42"></a>42</td><td></td><td></td><td></td><td></td><td class="s"> $modlibname =~ s,[\\/][^\\/]+$,, while $c--; # Q&amp;D basename</td></tr>
221<tr><td class="h"><a name="43"></a>43</td><td></td><td></td><td></td><td></td><td class="s"> my $file = &quot;$modlibname/auto/$modpname/$modfname.bundle&quot;;</td></tr>
222<tr><td class="h"><a name="44"></a>44</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
223<tr><td class="h"><a name="45"></a>45</td><td></td><td></td><td></td><td></td><td class="s"># print STDERR &quot;XSLoader::load for $module ($file)\n&quot; if $dl_debug;</td></tr>
224<tr><td class="h"><a name="46"></a>46</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
225<tr><td class="h"><a name="47"></a>47</td><td></td><td></td><td></td><td></td><td class="s"> my $bs = $file;</td></tr>
226<tr><td class="h"><a name="48"></a>48</td><td></td><td></td><td></td><td></td><td class="s"> $bs =~ s/(\.\w+)?(;\d*)?$/\.bs/; # look for .bs 'beside' the library</td></tr>
227<tr><td class="h"><a name="49"></a>49</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
228<tr><td class="h"><a name="50"></a>50</td><td></td><td></td><td></td><td></td><td class="s"> if (-s $bs) { # only read file if it's not empty</td></tr>
229<tr><td class="h"><a name="51"></a>51</td><td></td><td></td><td></td><td></td><td class="s"># print STDERR &quot;BS: $bs ($^O, $dlsrc)\n&quot; if $dl_debug;</td></tr>
230<tr><td class="h"><a name="52"></a>52</td><td></td><td></td><td></td><td></td><td class="s"> eval { do $bs; };</td></tr>
231<tr><td class="h"><a name="53"></a>53</td><td></td><td></td><td></td><td></td><td class="s"> warn &quot;$bs: $@\n&quot; if $@;</td></tr>
232<tr><td class="h"><a name="54"></a>54</td><td></td><td></td><td></td><td></td><td class="s"> }</td></tr>
233<tr><td class="h"><a name="55"></a>55</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
234<tr><td class="h"><a name="56"></a>56</td><td></td><td></td><td></td><td></td><td class="s"> goto \&amp;XSLoader::bootstrap_inherit if not -f $file or -s $bs;</td></tr>
235<tr><td class="h"><a name="57"></a>57</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
236<tr><td class="h"><a name="58"></a>58</td><td></td><td></td><td></td><td></td><td class="s"> my $bootname = &quot;boot_$module&quot;;</td></tr>
237<tr><td class="h"><a name="59"></a>59</td><td></td><td></td><td></td><td></td><td class="s"> $bootname =~ s/\W/_/g;</td></tr>
238<tr><td class="h"><a name="60"></a>60</td><td></td><td></td><td></td><td></td><td class="s"> @DynaLoader::dl_require_symbols = ($bootname);</td></tr>
239<tr><td class="h"><a name="61"></a>61</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
240<tr><td class="h"><a name="62"></a>62</td><td></td><td></td><td></td><td></td><td class="s"> my $boot_symbol_ref;</td></tr>
241<tr><td class="h"><a name="63"></a>63</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
242<tr><td class="h"><a name="64"></a>64</td><td></td><td></td><td></td><td></td><td class="s"> if ($boot_symbol_ref = dl_find_symbol(0, $bootname)) {</td></tr>
243<tr><td class="h"><a name="65"></a>65</td><td></td><td></td><td></td><td></td><td class="s"> goto boot; #extension library has already been loaded, e.g. darwin</td></tr>
244<tr><td class="h"><a name="66"></a>66</td><td></td><td></td><td></td><td></td><td class="s"> }</td></tr>
245<tr><td class="h"><a name="67"></a>67</td><td></td><td></td><td></td><td></td><td class="s"> # Many dynamic extension loading problems will appear to come from</td></tr>
246<tr><td class="h"><a name="68"></a>68</td><td></td><td></td><td></td><td></td><td class="s"> # this section of code: XYZ failed at line 123 of DynaLoader.pm.</td></tr>
247<tr><td class="h"><a name="69"></a>69</td><td></td><td></td><td></td><td></td><td class="s"> # Often these errors are actually occurring in the initialisation</td></tr>
248<tr><td class="h"><a name="70"></a>70</td><td></td><td></td><td></td><td></td><td class="s"> # C code of the extension XS file. Perl reports the error as being</td></tr>
249<tr><td class="h"><a name="71"></a>71</td><td></td><td></td><td></td><td></td><td class="s"> # in this perl code simply because this was the last perl code</td></tr>
250<tr><td class="h"><a name="72"></a>72</td><td></td><td></td><td></td><td></td><td class="s"> # it executed.</td></tr>
251<tr><td class="h"><a name="73"></a>73</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
252<tr><td class="h"><a name="74"></a>74</td><td></td><td></td><td></td><td></td><td class="s"> my $libref = dl_load_file($file, 0) or do { </td></tr>
253<tr><td class="h"><a name="75"></a>75</td><td></td><td></td><td></td><td></td><td class="s"> require Carp;</td></tr>
254<tr><td class="h"><a name="76"></a>76</td><td></td><td></td><td></td><td></td><td class="s"> Carp::croak(&quot;Can't load '$file' for module $module: &quot; . dl_error());</td></tr>
255<tr><td class="h"><a name="77"></a>77</td><td></td><td></td><td></td><td></td><td class="s"> };</td></tr>
256<tr><td class="h"><a name="78"></a>78</td><td></td><td></td><td></td><td></td><td class="s"> push(@DynaLoader::dl_librefs,$libref); # record loaded object</td></tr>
257<tr><td class="h"><a name="79"></a>79</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
258<tr><td class="h"><a name="80"></a>80</td><td></td><td></td><td></td><td></td><td class="s"> my @unresolved = dl_undef_symbols();</td></tr>
259<tr><td class="h"><a name="81"></a>81</td><td></td><td></td><td></td><td></td><td class="s"> if (@unresolved) {</td></tr>
260<tr><td class="h"><a name="82"></a>82</td><td></td><td></td><td></td><td></td><td class="s"> require Carp;</td></tr>
261<tr><td class="h"><a name="83"></a>83</td><td></td><td></td><td></td><td></td><td class="s"> Carp::carp(&quot;Undefined symbols present after loading $file: @unresolved\n&quot;);</td></tr>
262<tr><td class="h"><a name="84"></a>84</td><td></td><td></td><td></td><td></td><td class="s"> }</td></tr>
263<tr><td class="h"><a name="85"></a>85</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
264<tr><td class="h"><a name="86"></a>86</td><td></td><td></td><td></td><td></td><td class="s"> $boot_symbol_ref = dl_find_symbol($libref, $bootname) or do {</td></tr>
265<tr><td class="h"><a name="87"></a>87</td><td></td><td></td><td></td><td></td><td class="s"> require Carp;</td></tr>
266<tr><td class="h"><a name="88"></a>88</td><td></td><td></td><td></td><td></td><td class="s"> Carp::croak(&quot;Can't find '$bootname' symbol in $file\n&quot;);</td></tr>
267<tr><td class="h"><a name="89"></a>89</td><td></td><td></td><td></td><td></td><td class="s"> };</td></tr>
268<tr><td class="h"><a name="90"></a>90</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
269<tr><td class="h"><a name="91"></a>91</td><td></td><td></td><td></td><td></td><td class="s"> push(@DynaLoader::dl_modules, $module); # record loaded module</td></tr>
270<tr><td class="h"><a name="92"></a>92</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
271<tr><td class="h"><a name="93"></a>93</td><td></td><td></td><td></td><td></td><td class="s"> boot:</td></tr>
272<tr><td class="h"><a name="94"></a>94</td><td></td><td></td><td></td><td></td><td class="s"> my $xs = dl_install_xsub($boots, $boot_symbol_ref, $file);</td></tr>
273<tr><td class="h"><a name="95"></a>95</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
274<tr><td class="h"><a name="96"></a>96</td><td></td><td></td><td></td><td></td><td class="s"> # See comment block above</td></tr>
275<tr><td class="h"><a name="97"></a>97</td><td></td><td></td><td></td><td></td><td class="s"> push(@DynaLoader::dl_shared_objects, $file); # record files loaded</td></tr>
276<tr><td class="h"><a name="98"></a>98</td><td class="c3">2</td><td class="c3"><span title="Avg 28&micro;s">56&micro;s</span></td><td class="c3">6</td><td class="c3">79&micro;s</td><td class="s"> return &amp;$xs(@_);<div class="calls"><div class="calls_out"> # spent 44&micro;s making 1 call to <a href="attributes-pm-622-sub.html#41">attributes::import</a>
277 # spent 30&micro;s making 4 calls to <a href="Encode-pm-687-sub.html#88">Encode::define_encoding</a>, avg 8&micro;s/call
278 # spent 6&micro;s making 1 call to <a href="Hash-Util-FieldHash-pm-1535-sub.html#28">Hash::Util::FieldHash::_ob_reg</a></div></div></td></tr>
279<tr><td class="h"><a name="99"></a>99</td><td></td><td></td><td></td><td></td><td class="s">}</td></tr>
280<tr><td class="h"><a name="100"></a>100</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
281<tr><td class="h"><a name="101"></a>101</td><td></td><td></td><td></td><td></td><td class="s">sub bootstrap_inherit {</td></tr>
282<tr><td class="h"><a name="102"></a>102</td><td></td><td></td><td></td><td></td><td class="s"> require DynaLoader;</td></tr>
283<tr><td class="h"><a name="103"></a>103</td><td></td><td></td><td></td><td></td><td class="s"> goto \&amp;DynaLoader::bootstrap_inherit;</td></tr>
284<tr><td class="h"><a name="104"></a>104</td><td></td><td></td><td></td><td></td><td class="s">}</td></tr>
285<tr><td class="h"><a name="105"></a>105</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
286<tr><td class="h"><a name="106"></a>106</td><td></td><td></td><td></td><td></td><td class="s">1;</td></tr>
287<tr><td class="h"><a name="107"></a>107</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
288<tr><td class="h"><a name="108"></a>108</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
289<tr><td class="h"><a name="109"></a>109</td><td></td><td></td><td></td><td></td><td class="s">__END__</td></tr>
290<tr><td class="h"><a name="110"></a>110</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
291<tr><td class="h"><a name="111"></a>111</td><td></td><td></td><td></td><td></td><td class="s">=head1 NAME</td></tr>
292<tr><td class="h"><a name="112"></a>112</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
293<tr><td class="h"><a name="113"></a>113</td><td></td><td></td><td></td><td></td><td class="s">XSLoader - Dynamically load C libraries into Perl code</td></tr>
294<tr><td class="h"><a name="114"></a>114</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
295<tr><td class="h"><a name="115"></a>115</td><td></td><td></td><td></td><td></td><td class="s">=head1 VERSION</td></tr>
296<tr><td class="h"><a name="116"></a>116</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
297<tr><td class="h"><a name="117"></a>117</td><td></td><td></td><td></td><td></td><td class="s">Version 0.15</td></tr>
298<tr><td class="h"><a name="118"></a>118</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
299<tr><td class="h"><a name="119"></a>119</td><td></td><td></td><td></td><td></td><td class="s">=head1 SYNOPSIS</td></tr>
300<tr><td class="h"><a name="120"></a>120</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
301<tr><td class="h"><a name="121"></a>121</td><td></td><td></td><td></td><td></td><td class="s"> package YourPackage;</td></tr>
302<tr><td class="h"><a name="122"></a>122</td><td></td><td></td><td></td><td></td><td class="s"> require XSLoader;</td></tr>
303<tr><td class="h"><a name="123"></a>123</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
304<tr><td class="h"><a name="124"></a>124</td><td></td><td></td><td></td><td></td><td class="s"> XSLoader::load();</td></tr>
305<tr><td class="h"><a name="125"></a>125</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
306<tr><td class="h"><a name="126"></a>126</td><td></td><td></td><td></td><td></td><td class="s">=head1 DESCRIPTION</td></tr>
307<tr><td class="h"><a name="127"></a>127</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
308<tr><td class="h"><a name="128"></a>128</td><td></td><td></td><td></td><td></td><td class="s">This module defines a standard I&lt;simplified&gt; interface to the dynamic</td></tr>
309<tr><td class="h"><a name="129"></a>129</td><td></td><td></td><td></td><td></td><td class="s">linking mechanisms available on many platforms. Its primary purpose is</td></tr>
310<tr><td class="h"><a name="130"></a>130</td><td></td><td></td><td></td><td></td><td class="s">to implement cheap automatic dynamic loading of Perl modules.</td></tr>
311<tr><td class="h"><a name="131"></a>131</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
312<tr><td class="h"><a name="132"></a>132</td><td></td><td></td><td></td><td></td><td class="s">For a more complicated interface, see L&lt;DynaLoader&gt;. Many (most)</td></tr>
313<tr><td class="h"><a name="133"></a>133</td><td></td><td></td><td></td><td></td><td class="s">features of C&lt;DynaLoader&gt; are not implemented in C&lt;XSLoader&gt;, like for</td></tr>
314<tr><td class="h"><a name="134"></a>134</td><td></td><td></td><td></td><td></td><td class="s">example the C&lt;dl_load_flags&gt;, not honored by C&lt;XSLoader&gt;.</td></tr>
315<tr><td class="h"><a name="135"></a>135</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
316<tr><td class="h"><a name="136"></a>136</td><td></td><td></td><td></td><td></td><td class="s">=head2 Migration from C&lt;DynaLoader&gt;</td></tr>
317<tr><td class="h"><a name="137"></a>137</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
318<tr><td class="h"><a name="138"></a>138</td><td></td><td></td><td></td><td></td><td class="s">A typical module using L&lt;DynaLoader|DynaLoader&gt; starts like this:</td></tr>
319<tr><td class="h"><a name="139"></a>139</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
320<tr><td class="h"><a name="140"></a>140</td><td></td><td></td><td></td><td></td><td class="s"> package YourPackage;</td></tr>
321<tr><td class="h"><a name="141"></a>141</td><td></td><td></td><td></td><td></td><td class="s"> require DynaLoader;</td></tr>
322<tr><td class="h"><a name="142"></a>142</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
323<tr><td class="h"><a name="143"></a>143</td><td></td><td></td><td></td><td></td><td class="s"> our @ISA = qw( OnePackage OtherPackage DynaLoader );</td></tr>
324<tr><td class="h"><a name="144"></a>144</td><td></td><td></td><td></td><td></td><td class="s"> our $VERSION = '0.01';</td></tr>
325<tr><td class="h"><a name="145"></a>145</td><td></td><td></td><td></td><td></td><td class="s"> bootstrap YourPackage $VERSION;</td></tr>
326<tr><td class="h"><a name="146"></a>146</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
327<tr><td class="h"><a name="147"></a>147</td><td></td><td></td><td></td><td></td><td class="s">Change this to</td></tr>
328<tr><td class="h"><a name="148"></a>148</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
329<tr><td class="h"><a name="149"></a>149</td><td></td><td></td><td></td><td></td><td class="s"> package YourPackage;</td></tr>
330<tr><td class="h"><a name="150"></a>150</td><td></td><td></td><td></td><td></td><td class="s"> use XSLoader;</td></tr>
331<tr><td class="h"><a name="151"></a>151</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
332<tr><td class="h"><a name="152"></a>152</td><td></td><td></td><td></td><td></td><td class="s"> our @ISA = qw( OnePackage OtherPackage );</td></tr>
333<tr><td class="h"><a name="153"></a>153</td><td></td><td></td><td></td><td></td><td class="s"> our $VERSION = '0.01';</td></tr>
334<tr><td class="h"><a name="154"></a>154</td><td></td><td></td><td></td><td></td><td class="s"> XSLoader::load 'YourPackage', $VERSION;</td></tr>
335<tr><td class="h"><a name="155"></a>155</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
336<tr><td class="h"><a name="156"></a>156</td><td></td><td></td><td></td><td></td><td class="s">In other words: replace C&lt;require DynaLoader&gt; by C&lt;use XSLoader&gt;, remove</td></tr>
337<tr><td class="h"><a name="157"></a>157</td><td></td><td></td><td></td><td></td><td class="s">C&lt;DynaLoader&gt; from C&lt;@ISA&gt;, change C&lt;bootstrap&gt; by C&lt;XSLoader::load&gt;. Do not</td></tr>
338<tr><td class="h"><a name="158"></a>158</td><td></td><td></td><td></td><td></td><td class="s">forget to quote the name of your package on the C&lt;XSLoader::load&gt; line,</td></tr>
339<tr><td class="h"><a name="159"></a>159</td><td></td><td></td><td></td><td></td><td class="s">and add comma (C&lt;,&gt;) before the arguments (C&lt;$VERSION&gt; above).</td></tr>
340<tr><td class="h"><a name="160"></a>160</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
341<tr><td class="h"><a name="161"></a>161</td><td></td><td></td><td></td><td></td><td class="s">Of course, if C&lt;@ISA&gt; contained only C&lt;DynaLoader&gt;, there is no need to have</td></tr>
342<tr><td class="h"><a name="162"></a>162</td><td></td><td></td><td></td><td></td><td class="s">the C&lt;@ISA&gt; assignment at all; moreover, if instead of C&lt;our&gt; one uses the</td></tr>
343<tr><td class="h"><a name="163"></a>163</td><td></td><td></td><td></td><td></td><td class="s">more backward-compatible</td></tr>
344<tr><td class="h"><a name="164"></a>164</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
345<tr><td class="h"><a name="165"></a>165</td><td></td><td></td><td></td><td></td><td class="s"> use vars qw($VERSION @ISA);</td></tr>
346<tr><td class="h"><a name="166"></a>166</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
347<tr><td class="h"><a name="167"></a>167</td><td></td><td></td><td></td><td></td><td class="s">one can remove this reference to C&lt;@ISA&gt; together with the C&lt;@ISA&gt; assignment.</td></tr>
348<tr><td class="h"><a name="168"></a>168</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
349<tr><td class="h"><a name="169"></a>169</td><td></td><td></td><td></td><td></td><td class="s">If no C&lt;$VERSION&gt; was specified on the C&lt;bootstrap&gt; line, the last line becomes</td></tr>
350<tr><td class="h"><a name="170"></a>170</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
351<tr><td class="h"><a name="171"></a>171</td><td></td><td></td><td></td><td></td><td class="s"> XSLoader::load 'YourPackage';</td></tr>
352<tr><td class="h"><a name="172"></a>172</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
353<tr><td class="h"><a name="173"></a>173</td><td></td><td></td><td></td><td></td><td class="s">If the call to C&lt;load&gt; is from the YourPackage, then that can be further</td></tr>
354<tr><td class="h"><a name="174"></a>174</td><td></td><td></td><td></td><td></td><td class="s">simplified to</td></tr>
355<tr><td class="h"><a name="175"></a>175</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
356<tr><td class="h"><a name="176"></a>176</td><td></td><td></td><td></td><td></td><td class="s"> XSLoader::load();</td></tr>
357<tr><td class="h"><a name="177"></a>177</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
358<tr><td class="h"><a name="178"></a>178</td><td></td><td></td><td></td><td></td><td class="s">as C&lt;load&gt; will use C&lt;caller&gt; to determine the package.</td></tr>
359<tr><td class="h"><a name="179"></a>179</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
360<tr><td class="h"><a name="180"></a>180</td><td></td><td></td><td></td><td></td><td class="s">=head2 Backward compatible boilerplate</td></tr>
361<tr><td class="h"><a name="181"></a>181</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
362<tr><td class="h"><a name="182"></a>182</td><td></td><td></td><td></td><td></td><td class="s">If you want to have your cake and eat it too, you need a more complicated</td></tr>
363<tr><td class="h"><a name="183"></a>183</td><td></td><td></td><td></td><td></td><td class="s">boilerplate.</td></tr>
364<tr><td class="h"><a name="184"></a>184</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
365<tr><td class="h"><a name="185"></a>185</td><td></td><td></td><td></td><td></td><td class="s"> package YourPackage;</td></tr>
366<tr><td class="h"><a name="186"></a>186</td><td></td><td></td><td></td><td></td><td class="s"> use vars qw($VERSION @ISA);</td></tr>
367<tr><td class="h"><a name="187"></a>187</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
368<tr><td class="h"><a name="188"></a>188</td><td></td><td></td><td></td><td></td><td class="s"> @ISA = qw( OnePackage OtherPackage );</td></tr>
369<tr><td class="h"><a name="189"></a>189</td><td></td><td></td><td></td><td></td><td class="s"> $VERSION = '0.01';</td></tr>
370<tr><td class="h"><a name="190"></a>190</td><td></td><td></td><td></td><td></td><td class="s"> eval {</td></tr>
371<tr><td class="h"><a name="191"></a>191</td><td></td><td></td><td></td><td></td><td class="s"> require XSLoader;</td></tr>
372<tr><td class="h"><a name="192"></a>192</td><td></td><td></td><td></td><td></td><td class="s"> XSLoader::load('YourPackage', $VERSION);</td></tr>
373<tr><td class="h"><a name="193"></a>193</td><td></td><td></td><td></td><td></td><td class="s"> 1;</td></tr>
374<tr><td class="h"><a name="194"></a>194</td><td></td><td></td><td></td><td></td><td class="s"> } or do {</td></tr>
375<tr><td class="h"><a name="195"></a>195</td><td></td><td></td><td></td><td></td><td class="s"> require DynaLoader;</td></tr>
376<tr><td class="h"><a name="196"></a>196</td><td></td><td></td><td></td><td></td><td class="s"> push @ISA, 'DynaLoader';</td></tr>
377<tr><td class="h"><a name="197"></a>197</td><td></td><td></td><td></td><td></td><td class="s"> bootstrap YourPackage $VERSION;</td></tr>
378<tr><td class="h"><a name="198"></a>198</td><td></td><td></td><td></td><td></td><td class="s"> };</td></tr>
379<tr><td class="h"><a name="199"></a>199</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
380<tr><td class="h"><a name="200"></a>200</td><td></td><td></td><td></td><td></td><td class="s">The parentheses about C&lt;XSLoader::load()&gt; arguments are needed since we replaced</td></tr>
381<tr><td class="h"><a name="201"></a>201</td><td></td><td></td><td></td><td></td><td class="s">C&lt;use XSLoader&gt; by C&lt;require&gt;, so the compiler does not know that a function</td></tr>
382<tr><td class="h"><a name="202"></a>202</td><td></td><td></td><td></td><td></td><td class="s">C&lt;XSLoader::load()&gt; is present.</td></tr>
383<tr><td class="h"><a name="203"></a>203</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
384<tr><td class="h"><a name="204"></a>204</td><td></td><td></td><td></td><td></td><td class="s">This boilerplate uses the low-overhead C&lt;XSLoader&gt; if present; if used with</td></tr>
385<tr><td class="h"><a name="205"></a>205</td><td></td><td></td><td></td><td></td><td class="s">an antic Perl which has no C&lt;XSLoader&gt;, it falls back to using C&lt;DynaLoader&gt;.</td></tr>
386<tr><td class="h"><a name="206"></a>206</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
387<tr><td class="h"><a name="207"></a>207</td><td></td><td></td><td></td><td></td><td class="s">=head1 Order of initialization: early load()</td></tr>
388<tr><td class="h"><a name="208"></a>208</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
389<tr><td class="h"><a name="209"></a>209</td><td></td><td></td><td></td><td></td><td class="s">I&lt;Skip this section if the XSUB functions are supposed to be called from other</td></tr>
390<tr><td class="h"><a name="210"></a>210</td><td></td><td></td><td></td><td></td><td class="s">modules only; read it only if you call your XSUBs from the code in your module,</td></tr>
391<tr><td class="h"><a name="211"></a>211</td><td></td><td></td><td></td><td></td><td class="s">or have a C&lt;BOOT:&gt; section in your XS file (see L&lt;perlxs/&quot;The BOOT: Keyword&quot;&gt;).</td></tr>
392<tr><td class="h"><a name="212"></a>212</td><td></td><td></td><td></td><td></td><td class="s">What is described here is equally applicable to the L&lt;DynaLoader|DynaLoader&gt;</td></tr>
393<tr><td class="h"><a name="213"></a>213</td><td></td><td></td><td></td><td></td><td class="s">interface.&gt;</td></tr>
394<tr><td class="h"><a name="214"></a>214</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
395<tr><td class="h"><a name="215"></a>215</td><td></td><td></td><td></td><td></td><td class="s">A sufficiently complicated module using XS would have both Perl code (defined</td></tr>
396<tr><td class="h"><a name="216"></a>216</td><td></td><td></td><td></td><td></td><td class="s">in F&lt;YourPackage.pm&gt;) and XS code (defined in F&lt;YourPackage.xs&gt;). If this</td></tr>
397<tr><td class="h"><a name="217"></a>217</td><td></td><td></td><td></td><td></td><td class="s">Perl code makes calls into this XS code, and/or this XS code makes calls to</td></tr>
398<tr><td class="h"><a name="218"></a>218</td><td></td><td></td><td></td><td></td><td class="s">the Perl code, one should be careful with the order of initialization.</td></tr>
399<tr><td class="h"><a name="219"></a>219</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
400<tr><td class="h"><a name="220"></a>220</td><td></td><td></td><td></td><td></td><td class="s">The call to C&lt;XSLoader::load()&gt; (or C&lt;bootstrap()&gt;) calls the module's</td></tr>
401<tr><td class="h"><a name="221"></a>221</td><td></td><td></td><td></td><td></td><td class="s">bootstrap code. For modules build by F&lt;xsubpp&gt; (nearly all modules) this</td></tr>
402<tr><td class="h"><a name="222"></a>222</td><td></td><td></td><td></td><td></td><td class="s">has three side effects:</td></tr>
403<tr><td class="h"><a name="223"></a>223</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
404<tr><td class="h"><a name="224"></a>224</td><td></td><td></td><td></td><td></td><td class="s">=over</td></tr>
405<tr><td class="h"><a name="225"></a>225</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
406<tr><td class="h"><a name="226"></a>226</td><td></td><td></td><td></td><td></td><td class="s">=item *</td></tr>
407<tr><td class="h"><a name="227"></a>227</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
408<tr><td class="h"><a name="228"></a>228</td><td></td><td></td><td></td><td></td><td class="s">A sanity check is done to ensure that the versions of the F&lt;.pm&gt; and the</td></tr>
409<tr><td class="h"><a name="229"></a>229</td><td></td><td></td><td></td><td></td><td class="s">(compiled) F&lt;.xs&gt; parts are compatible. If C&lt;$VERSION&gt; was specified, this</td></tr>
410<tr><td class="h"><a name="230"></a>230</td><td></td><td></td><td></td><td></td><td class="s">is used for the check. If not specified, it defaults to</td></tr>
411<tr><td class="h"><a name="231"></a>231</td><td></td><td></td><td></td><td></td><td class="s">C&lt;$XS_VERSION // $VERSION&gt; (in the module's namespace)</td></tr>
412<tr><td class="h"><a name="232"></a>232</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
413<tr><td class="h"><a name="233"></a>233</td><td></td><td></td><td></td><td></td><td class="s">=item *</td></tr>
414<tr><td class="h"><a name="234"></a>234</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
415<tr><td class="h"><a name="235"></a>235</td><td></td><td></td><td></td><td></td><td class="s">the XSUBs are made accessible from Perl</td></tr>
416<tr><td class="h"><a name="236"></a>236</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
417<tr><td class="h"><a name="237"></a>237</td><td></td><td></td><td></td><td></td><td class="s">=item *</td></tr>
418<tr><td class="h"><a name="238"></a>238</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
419<tr><td class="h"><a name="239"></a>239</td><td></td><td></td><td></td><td></td><td class="s">if a C&lt;BOOT:&gt; section was present in the F&lt;.xs&gt; file, the code there is called.</td></tr>
420<tr><td class="h"><a name="240"></a>240</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
421<tr><td class="h"><a name="241"></a>241</td><td></td><td></td><td></td><td></td><td class="s">=back</td></tr>
422<tr><td class="h"><a name="242"></a>242</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
423<tr><td class="h"><a name="243"></a>243</td><td></td><td></td><td></td><td></td><td class="s">Consequently, if the code in the F&lt;.pm&gt; file makes calls to these XSUBs, it is</td></tr>
424<tr><td class="h"><a name="244"></a>244</td><td></td><td></td><td></td><td></td><td class="s">convenient to have XSUBs installed before the Perl code is defined; for</td></tr>
425<tr><td class="h"><a name="245"></a>245</td><td></td><td></td><td></td><td></td><td class="s">example, this makes prototypes for XSUBs visible to this Perl code.</td></tr>
426<tr><td class="h"><a name="246"></a>246</td><td></td><td></td><td></td><td></td><td class="s">Alternatively, if the C&lt;BOOT:&gt; section makes calls to Perl functions (or</td></tr>
427<tr><td class="h"><a name="247"></a>247</td><td></td><td></td><td></td><td></td><td class="s">uses Perl variables) defined in the F&lt;.pm&gt; file, they must be defined prior to</td></tr>
428<tr><td class="h"><a name="248"></a>248</td><td></td><td></td><td></td><td></td><td class="s">the call to C&lt;XSLoader::load()&gt; (or C&lt;bootstrap()&gt;).</td></tr>
429<tr><td class="h"><a name="249"></a>249</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
430<tr><td class="h"><a name="250"></a>250</td><td></td><td></td><td></td><td></td><td class="s">The first situation being much more frequent, it makes sense to rewrite the</td></tr>
431<tr><td class="h"><a name="251"></a>251</td><td></td><td></td><td></td><td></td><td class="s">boilerplate as</td></tr>
432<tr><td class="h"><a name="252"></a>252</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
433<tr><td class="h"><a name="253"></a>253</td><td></td><td></td><td></td><td></td><td class="s"> package YourPackage;</td></tr>
434<tr><td class="h"><a name="254"></a>254</td><td></td><td></td><td></td><td></td><td class="s"> use XSLoader;</td></tr>
435<tr><td class="h"><a name="255"></a>255</td><td></td><td></td><td></td><td></td><td class="s"> use vars qw($VERSION @ISA);</td></tr>
436<tr><td class="h"><a name="256"></a>256</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
437<tr><td class="h"><a name="257"></a>257</td><td></td><td></td><td></td><td></td><td class="s"> BEGIN {</td></tr>
438<tr><td class="h"><a name="258"></a>258</td><td></td><td></td><td></td><td></td><td class="s"> @ISA = qw( OnePackage OtherPackage );</td></tr>
439<tr><td class="h"><a name="259"></a>259</td><td></td><td></td><td></td><td></td><td class="s"> $VERSION = '0.01';</td></tr>
440<tr><td class="h"><a name="260"></a>260</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
441<tr><td class="h"><a name="261"></a>261</td><td></td><td></td><td></td><td></td><td class="s"> # Put Perl code used in the BOOT: section here</td></tr>
442<tr><td class="h"><a name="262"></a>262</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
443<tr><td class="h"><a name="263"></a>263</td><td></td><td></td><td></td><td></td><td class="s"> XSLoader::load 'YourPackage', $VERSION;</td></tr>
444<tr><td class="h"><a name="264"></a>264</td><td></td><td></td><td></td><td></td><td class="s"> }</td></tr>
445<tr><td class="h"><a name="265"></a>265</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
446<tr><td class="h"><a name="266"></a>266</td><td></td><td></td><td></td><td></td><td class="s"> # Put Perl code making calls into XSUBs here</td></tr>
447<tr><td class="h"><a name="267"></a>267</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
448<tr><td class="h"><a name="268"></a>268</td><td></td><td></td><td></td><td></td><td class="s">=head2 The most hairy case</td></tr>
449<tr><td class="h"><a name="269"></a>269</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
450<tr><td class="h"><a name="270"></a>270</td><td></td><td></td><td></td><td></td><td class="s">If the interdependence of your C&lt;BOOT:&gt; section and Perl code is</td></tr>
451<tr><td class="h"><a name="271"></a>271</td><td></td><td></td><td></td><td></td><td class="s">more complicated than this (e.g., the C&lt;BOOT:&gt; section makes calls to Perl</td></tr>
452<tr><td class="h"><a name="272"></a>272</td><td></td><td></td><td></td><td></td><td class="s">functions which make calls to XSUBs with prototypes), get rid of the C&lt;BOOT:&gt;</td></tr>
453<tr><td class="h"><a name="273"></a>273</td><td></td><td></td><td></td><td></td><td class="s">section altogether. Replace it with a function C&lt;onBOOT()&gt;, and call it like</td></tr>
454<tr><td class="h"><a name="274"></a>274</td><td></td><td></td><td></td><td></td><td class="s">this:</td></tr>
455<tr><td class="h"><a name="275"></a>275</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
456<tr><td class="h"><a name="276"></a>276</td><td></td><td></td><td></td><td></td><td class="s"> package YourPackage;</td></tr>
457<tr><td class="h"><a name="277"></a>277</td><td></td><td></td><td></td><td></td><td class="s"> use XSLoader;</td></tr>
458<tr><td class="h"><a name="278"></a>278</td><td></td><td></td><td></td><td></td><td class="s"> use vars qw($VERSION @ISA);</td></tr>
459<tr><td class="h"><a name="279"></a>279</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
460<tr><td class="h"><a name="280"></a>280</td><td></td><td></td><td></td><td></td><td class="s"> BEGIN {</td></tr>
461<tr><td class="h"><a name="281"></a>281</td><td></td><td></td><td></td><td></td><td class="s"> @ISA = qw( OnePackage OtherPackage );</td></tr>
462<tr><td class="h"><a name="282"></a>282</td><td></td><td></td><td></td><td></td><td class="s"> $VERSION = '0.01';</td></tr>
463<tr><td class="h"><a name="283"></a>283</td><td></td><td></td><td></td><td></td><td class="s"> XSLoader::load 'YourPackage', $VERSION;</td></tr>
464<tr><td class="h"><a name="284"></a>284</td><td></td><td></td><td></td><td></td><td class="s"> }</td></tr>
465<tr><td class="h"><a name="285"></a>285</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
466<tr><td class="h"><a name="286"></a>286</td><td></td><td></td><td></td><td></td><td class="s"> # Put Perl code used in onBOOT() function here; calls to XSUBs are</td></tr>
467<tr><td class="h"><a name="287"></a>287</td><td></td><td></td><td></td><td></td><td class="s"> # prototype-checked.</td></tr>
468<tr><td class="h"><a name="288"></a>288</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
469<tr><td class="h"><a name="289"></a>289</td><td></td><td></td><td></td><td></td><td class="s"> onBOOT;</td></tr>
470<tr><td class="h"><a name="290"></a>290</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
471<tr><td class="h"><a name="291"></a>291</td><td></td><td></td><td></td><td></td><td class="s"> # Put Perl initialization code assuming that XS is initialized here</td></tr>
472<tr><td class="h"><a name="292"></a>292</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
473<tr><td class="h"><a name="293"></a>293</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
474<tr><td class="h"><a name="294"></a>294</td><td></td><td></td><td></td><td></td><td class="s">=head1 DIAGNOSTICS</td></tr>
475<tr><td class="h"><a name="295"></a>295</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
476<tr><td class="h"><a name="296"></a>296</td><td></td><td></td><td></td><td></td><td class="s">=over</td></tr>
477<tr><td class="h"><a name="297"></a>297</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
478<tr><td class="h"><a name="298"></a>298</td><td></td><td></td><td></td><td></td><td class="s">=item C&lt;Can't find '%s' symbol in %s&gt;</td></tr>
479<tr><td class="h"><a name="299"></a>299</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
480<tr><td class="h"><a name="300"></a>300</td><td></td><td></td><td></td><td></td><td class="s">B&lt;(F)&gt; The bootstrap symbol could not be found in the extension module.</td></tr>
481<tr><td class="h"><a name="301"></a>301</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
482<tr><td class="h"><a name="302"></a>302</td><td></td><td></td><td></td><td></td><td class="s">=item C&lt;Can't load '%s' for module %s: %s&gt;</td></tr>
483<tr><td class="h"><a name="303"></a>303</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
484<tr><td class="h"><a name="304"></a>304</td><td></td><td></td><td></td><td></td><td class="s">B&lt;(F)&gt; The loading or initialisation of the extension module failed.</td></tr>
485<tr><td class="h"><a name="305"></a>305</td><td></td><td></td><td></td><td></td><td class="s">The detailed error follows.</td></tr>
486<tr><td class="h"><a name="306"></a>306</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
487<tr><td class="h"><a name="307"></a>307</td><td></td><td></td><td></td><td></td><td class="s">=item C&lt;Undefined symbols present after loading %s: %s&gt;</td></tr>
488<tr><td class="h"><a name="308"></a>308</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
489<tr><td class="h"><a name="309"></a>309</td><td></td><td></td><td></td><td></td><td class="s">B&lt;(W)&gt; As the message says, some symbols stay undefined although the</td></tr>
490<tr><td class="h"><a name="310"></a>310</td><td></td><td></td><td></td><td></td><td class="s">extension module was correctly loaded and initialised. The list of undefined</td></tr>
491<tr><td class="h"><a name="311"></a>311</td><td></td><td></td><td></td><td></td><td class="s">symbols follows.</td></tr>
492<tr><td class="h"><a name="312"></a>312</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
493<tr><td class="h"><a name="313"></a>313</td><td></td><td></td><td></td><td></td><td class="s">=back</td></tr>
494<tr><td class="h"><a name="314"></a>314</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
495<tr><td class="h"><a name="315"></a>315</td><td></td><td></td><td></td><td></td><td class="s">=head1 LIMITATIONS</td></tr>
496<tr><td class="h"><a name="316"></a>316</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
497<tr><td class="h"><a name="317"></a>317</td><td></td><td></td><td></td><td></td><td class="s">To reduce the overhead as much as possible, only one possible location</td></tr>
498<tr><td class="h"><a name="318"></a>318</td><td></td><td></td><td></td><td></td><td class="s">is checked to find the extension DLL (this location is where C&lt;make install&gt;</td></tr>
499<tr><td class="h"><a name="319"></a>319</td><td></td><td></td><td></td><td></td><td class="s">would put the DLL). If not found, the search for the DLL is transparently</td></tr>
500<tr><td class="h"><a name="320"></a>320</td><td></td><td></td><td></td><td></td><td class="s">delegated to C&lt;DynaLoader&gt;, which looks for the DLL along the C&lt;@INC&gt; list.</td></tr>
501<tr><td class="h"><a name="321"></a>321</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
502<tr><td class="h"><a name="322"></a>322</td><td></td><td></td><td></td><td></td><td class="s">In particular, this is applicable to the structure of C&lt;@INC&gt; used for testing</td></tr>
503<tr><td class="h"><a name="323"></a>323</td><td></td><td></td><td></td><td></td><td class="s">not-yet-installed extensions. This means that running uninstalled extensions</td></tr>
504<tr><td class="h"><a name="324"></a>324</td><td></td><td></td><td></td><td></td><td class="s">may have much more overhead than running the same extensions after</td></tr>
505<tr><td class="h"><a name="325"></a>325</td><td></td><td></td><td></td><td></td><td class="s">C&lt;make install&gt;.</td></tr>
506<tr><td class="h"><a name="326"></a>326</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
507<tr><td class="h"><a name="327"></a>327</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
508<tr><td class="h"><a name="328"></a>328</td><td></td><td></td><td></td><td></td><td class="s">=head1 KNOWN BUGS</td></tr>
509<tr><td class="h"><a name="329"></a>329</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
510<tr><td class="h"><a name="330"></a>330</td><td></td><td></td><td></td><td></td><td class="s">The new simpler way to call C&lt;XSLoader::load()&gt; with no arguments at all</td></tr>
511<tr><td class="h"><a name="331"></a>331</td><td></td><td></td><td></td><td></td><td class="s">does not work on Perl 5.8.4 and 5.8.5.</td></tr>
512<tr><td class="h"><a name="332"></a>332</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
513<tr><td class="h"><a name="333"></a>333</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
514<tr><td class="h"><a name="334"></a>334</td><td></td><td></td><td></td><td></td><td class="s">=head1 BUGS</td></tr>
515<tr><td class="h"><a name="335"></a>335</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
516<tr><td class="h"><a name="336"></a>336</td><td></td><td></td><td></td><td></td><td class="s">Please report any bugs or feature requests via the perlbug(1) utility.</td></tr>
517<tr><td class="h"><a name="337"></a>337</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
518<tr><td class="h"><a name="338"></a>338</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
519<tr><td class="h"><a name="339"></a>339</td><td></td><td></td><td></td><td></td><td class="s">=head1 SEE ALSO</td></tr>
520<tr><td class="h"><a name="340"></a>340</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
521<tr><td class="h"><a name="341"></a>341</td><td></td><td></td><td></td><td></td><td class="s">L&lt;DynaLoader&gt;</td></tr>
522<tr><td class="h"><a name="342"></a>342</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
523<tr><td class="h"><a name="343"></a>343</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
524<tr><td class="h"><a name="344"></a>344</td><td></td><td></td><td></td><td></td><td class="s">=head1 AUTHORS</td></tr>
525<tr><td class="h"><a name="345"></a>345</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
526<tr><td class="h"><a name="346"></a>346</td><td></td><td></td><td></td><td></td><td class="s">Ilya Zakharevich originally extracted C&lt;XSLoader&gt; from C&lt;DynaLoader&gt;.</td></tr>
527<tr><td class="h"><a name="347"></a>347</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
528<tr><td class="h"><a name="348"></a>348</td><td></td><td></td><td></td><td></td><td class="s">CPAN version is currently maintained by SE&lt;eacute&gt;bastien Aperghis-Tramoni</td></tr>
529<tr><td class="h"><a name="349"></a>349</td><td></td><td></td><td></td><td></td><td class="s">E&lt;lt&gt;sebastien@aperghis.netE&lt;gt&gt;.</td></tr>
530<tr><td class="h"><a name="350"></a>350</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
531<tr><td class="h"><a name="351"></a>351</td><td></td><td></td><td></td><td></td><td class="s">Previous maintainer was Michael G Schwern &lt;schwern@pobox.com&gt;.</td></tr>
532<tr><td class="h"><a name="352"></a>352</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
533<tr><td class="h"><a name="353"></a>353</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
534<tr><td class="h"><a name="354"></a>354</td><td></td><td></td><td></td><td></td><td class="s">=head1 COPYRIGHT &amp; LICENSE</td></tr>
535<tr><td class="h"><a name="355"></a>355</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
536<tr><td class="h"><a name="356"></a>356</td><td></td><td></td><td></td><td></td><td class="s">Copyright (C) 1990-2011 by Larry Wall and others.</td></tr>
537<tr><td class="h"><a name="357"></a>357</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
538<tr><td class="h"><a name="358"></a>358</td><td></td><td></td><td></td><td></td><td class="s">This program is free software; you can redistribute it and/or modify</td></tr>
539<tr><td class="h"><a name="359"></a>359</td><td></td><td></td><td></td><td></td><td class="s">it under the same terms as Perl itself.</td></tr>
540<tr><td class="h"><a name="360"></a>360</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
541<tr><td class="h"><a name="361"></a>361</td><td></td><td></td><td></td><td></td><td class="s">=cut</td></tr>
542</tbody></table></div>
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