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1 | /* perlvars.h |
2 | * |
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3 | * Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, |
4 | * by Larry Wall and others |
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5 | * |
6 | * You may distribute under the terms of either the GNU General Public |
7 | * License or the Artistic License, as specified in the README file. |
8 | * |
9 | */ |
10 | |
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11 | /****************/ |
12 | /* Truly global */ |
13 | /****************/ |
14 | |
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15 | /* Don't forget to re-run embed.pl to propagate changes! */ |
16 | |
17 | /* This file describes the "global" variables used by perl |
18 | * This used to be in perl.h directly but we want to abstract out into |
19 | * distinct files which are per-thread, per-interpreter or really global, |
20 | * and how they're initialized. |
21 | * |
22 | * The 'G' prefix is only needed for vars that need appropriate #defines |
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23 | * generated in embed*.h. Such symbols are also used to generate |
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24 | * the appropriate export list for win32. */ |
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25 | |
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26 | /* global state */ |
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27 | PERLVAR(Gcurinterp, PerlInterpreter *) |
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28 | /* currently running interpreter |
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29 | * (initial parent interpreter under |
30 | * useithreads) */ |
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31 | #if defined(USE_ITHREADS) |
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32 | PERLVAR(Gthr_key, perl_key) /* key to retrieve per-thread struct */ |
33 | #endif |
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34 | |
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35 | /* constants (these are not literals to facilitate pointer comparisons) |
36 | * (PERLVARISC really does create variables, despite its looks) */ |
37 | PERLVARISC(GYes, "1") |
38 | PERLVARISC(GNo, "") |
39 | PERLVARISC(Ghexdigit, "0123456789abcdef0123456789ABCDEF") |
40 | PERLVARISC(Gpatleave, "\\.^$@dDwWsSbB+*?|()-nrtfeaxc0123456789[{]}") |
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41 | |
42 | /* XXX does anyone even use this? */ |
43 | PERLVARI(Gdo_undump, bool, FALSE) /* -u or dump seen? */ |
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44 | |
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45 | #if defined(MYMALLOC) && defined(USE_ITHREADS) |
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46 | PERLVAR(Gmalloc_mutex, perl_mutex) /* Mutex for malloc */ |
47 | #endif |
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48 | |
49 | #if defined(USE_ITHREADS) |
50 | PERLVAR(Gop_mutex, perl_mutex) /* Mutex for op refcounting */ |
51 | #endif |
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52 | |
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53 | #ifdef USE_ITHREADS |
54 | PERLVAR(Gdollarzero_mutex, perl_mutex) /* Modifying $0 */ |
55 | #endif |
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56 | |
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57 | |
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58 | /* This is constant on most architectures, a global on OS/2 */ |
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59 | #ifdef OS2 |
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60 | # define PERL___C |
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61 | #else |
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62 | # define PERL___C const |
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63 | #endif |
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64 | PERLVARI(Gsh_path, PERL___C char *, SH_PATH) /* full path of shell */ |
65 | #undef PERL___C |
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66 | |
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67 | #ifndef PERL_MICRO |
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68 | /* If Perl has to ignore SIGPFE, this is its saved state. |
69 | * See perl.h macros PERL_FPU_INIT and PERL_FPU_{PRE,POST}_EXEC. */ |
70 | PERLVAR(Gsigfpe_saved, Sighandler_t) |
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71 | #endif |
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72 | |
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73 | /* Restricted hashes placeholder value. |
74 | * The contents are never used, only the address. */ |
75 | PERLVAR(Gsv_placeholder, SV) |
76 | |
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77 | #ifndef PERL_MICRO |
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78 | PERLVARI(Gcsighandlerp, Sighandler_t, Perl_csighandler) /* Pointer to C-level sighandler */ |
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79 | #endif |
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80 | |
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81 | #ifndef PERL_USE_SAFE_PUTENV |
82 | PERLVARI(Guse_safe_putenv, int, 1) |
83 | #endif |
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84 | |
85 | #ifdef USE_PERLIO |
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86 | PERLVARI(Gperlio_fd_refcnt, int*, 0) /* Pointer to array of fd refcounts. */ |
87 | PERLVARI(Gperlio_fd_refcnt_size, int, 0) /* Size of the array */ |
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88 | PERLVARI(Gperlio_debug_fd, int, 0) /* the fd to write perlio debug into, 0 means not set yet */ |
89 | #endif |
90 | |
91 | #ifdef HAS_MMAP |
92 | PERLVARI(Gmmap_page_size, IV, 0) |
93 | #endif |
94 | |
95 | #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS)||defined(FAKE_DEFAULT_SIGNAL_HANDLERS) |
96 | PERLVARI(Gsig_handlers_initted, int, 0) |
97 | #endif |
98 | #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS |
99 | PERLVARA(Gsig_ignoring, SIG_SIZE, int) /* which signals we are ignoring */ |
100 | #endif |
101 | #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS |
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102 | PERLVARA(Gsig_defaulting, SIG_SIZE, int) |
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103 | #endif |
104 | |
105 | #ifndef PERL_IMPLICIT_CONTEXT |
106 | PERLVAR(Gsig_sv, SV*) |
107 | #endif |
108 | |
109 | /* XXX signals are process-wide anyway, so we |
110 | * ignore the implications of this for threading */ |
111 | #ifndef HAS_SIGACTION |
112 | PERLVARI(Gsig_trapped, int, 0) |
113 | #endif |
114 | |
115 | #ifdef DEBUGGING |
116 | PERLVAR(Gwatch_pvx, char*) |
117 | #endif |
118 | |
119 | #ifdef PERL_GLOBAL_STRUCT |
120 | PERLVAR(Gppaddr, Perl_ppaddr_t*) /* or opcode.h */ |
121 | PERLVAR(Gcheck, Perl_check_t *) /* or opcode.h */ |
122 | PERLVARA(Gfold_locale, 256, unsigned char) /* or perl.h */ |
123 | #endif |
124 | |
125 | #ifdef PERL_NEED_APPCTX |
126 | PERLVAR(Gappctx, void*) /* the application context */ |
127 | #endif |
128 | |
129 | PERLVAR(Gop_sequence, HV*) /* dump.c */ |
130 | PERLVARI(Gop_seq, UV, 0) /* dump.c */ |
131 | |
132 | #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE) |
133 | PERLVAR(Gtimesbase, struct tms) |
134 | #endif |
135 | |
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136 | /* allocate a unique index to every module that calls MY_CXT_INIT */ |
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137 | |
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138 | #ifdef PERL_IMPLICIT_CONTEXT |
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139 | # ifdef USE_ITHREADS |
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140 | PERLVAR(Gmy_ctx_mutex, perl_mutex) |
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141 | # endif |
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142 | PERLVARI(Gmy_cxt_index, int, 0) |
143 | #endif |
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144 | |
145 | #if defined(USE_ITHREADS) |
146 | PERLVAR(Ghints_mutex, perl_mutex) /* Mutex for refcounted he refcounting */ |
147 | #endif |
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148 | |
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149 | #if defined(USE_ITHREADS) |
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150 | PERLVAR(Gperlio_mutex, perl_mutex) /* Mutex for perlio fd refcounts */ |
151 | #endif |
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152 | |
153 | /* this is currently set without MUTEX protection, so keep it a type which |
154 | * can be set atomically (ie not a bit field) */ |
155 | PERLVARI(Gveto_cleanup, int, FALSE) /* exit without cleanup */ |
156 | |
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157 | /* dummy variables that hold pointers to both runops functions, thus forcing |
158 | * them *both* to get linked in (useful for Peek.xs, debugging etc) */ |
159 | |
160 | PERLVARI(Grunops_std, runops_proc_t, MEMBER_TO_FPTR(Perl_runops_standard)) |
161 | PERLVARI(Grunops_dbg, runops_proc_t, MEMBER_TO_FPTR(Perl_runops_debug)) |
162 | |