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1 | /* dlutils.c - handy functions and definitions for dl_*.xs files |
2 | * |
3 | * Currently this file is simply #included into dl_*.xs/.c files. |
4 | * It should really be split into a dlutils.h and dlutils.c |
5 | * |
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6 | * Modified: |
7 | * 29th Feburary 2000 - Alan Burlison: Added functionality to close dlopen'd |
8 | * files when the interpreter exits |
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9 | */ |
10 | |
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11 | #ifndef START_MY_CXT /* Some IDEs try compiling this standalone. */ |
12 | # include "EXTERN.h" |
13 | # include "perl.h" |
14 | # include "XSUB.h" |
15 | #endif |
16 | |
89ca4ac7 |
17 | #ifndef XS_VERSION |
18 | # define XS_VERSION "0" |
19 | #endif |
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20 | #define MY_CXT_KEY "DynaLoader::_guts" XS_VERSION |
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21 | |
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22 | typedef struct { |
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23 | SV* x_dl_last_error; /* pointer to allocated memory for |
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24 | last error message */ |
25 | int x_dl_nonlazy; /* flag for immediate rather than lazy |
26 | linking (spots unresolved symbol) */ |
27 | #ifdef DL_LOADONCEONLY |
28 | HV * x_dl_loaded_files; /* only needed on a few systems */ |
29 | #endif |
30 | #ifdef DL_CXT_EXTRA |
31 | my_cxtx_t x_dl_cxtx; /* extra platform-specific data */ |
32 | #endif |
33 | #ifdef DEBUGGING |
34 | int x_dl_debug; /* value copied from $DynaLoader::dl_debug */ |
35 | #endif |
36 | } my_cxt_t; |
37 | |
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38 | START_MY_CXT |
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39 | |
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40 | #define dl_last_error (SvPVX(MY_CXT.x_dl_last_error)) |
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41 | #define dl_nonlazy (MY_CXT.x_dl_nonlazy) |
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42 | #ifdef DL_LOADONCEONLY |
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43 | #define dl_loaded_files (MY_CXT.x_dl_loaded_files) |
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44 | #endif |
45 | #ifdef DL_CXT_EXTRA |
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46 | #define dl_cxtx (MY_CXT.x_dl_cxtx) |
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47 | #endif |
48 | #ifdef DEBUGGING |
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49 | #define dl_debug (MY_CXT.x_dl_debug) |
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50 | #endif |
51 | |
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52 | #ifdef DEBUGGING |
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53 | #define DLDEBUG(level,code) \ |
54 | STMT_START { \ |
55 | dMY_CXT; \ |
56 | if (dl_debug>=level) { code; } \ |
57 | } STMT_END |
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58 | #else |
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59 | #define DLDEBUG(level,code) NOOP |
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60 | #endif |
61 | |
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62 | #ifdef DL_UNLOAD_ALL_AT_EXIT |
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63 | /* Close all dlopen'd files */ |
64 | static void |
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65 | dl_unload_all_files(pTHX_ void *unused) |
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66 | { |
67 | CV *sub; |
68 | AV *dl_librefs; |
69 | SV *dl_libref; |
70 | |
71 | if ((sub = get_cv("DynaLoader::dl_unload_file", FALSE)) != NULL) { |
72 | dl_librefs = get_av("DynaLoader::dl_librefs", FALSE); |
73 | while ((dl_libref = av_pop(dl_librefs)) != &PL_sv_undef) { |
74 | dSP; |
75 | ENTER; |
76 | SAVETMPS; |
77 | PUSHMARK(SP); |
78 | XPUSHs(sv_2mortal(dl_libref)); |
79 | PUTBACK; |
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80 | call_sv((SV*)sub, G_DISCARD | G_NODEBUG); |
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81 | FREETMPS; |
82 | LEAVE; |
83 | } |
84 | } |
85 | } |
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86 | #endif |
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87 | |
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88 | static void |
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89 | dl_generic_private_init(pTHX) /* called by dl_*.xs dl_private_init() */ |
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90 | { |
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91 | char *perl_dl_nonlazy; |
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92 | MY_CXT_INIT; |
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93 | |
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94 | MY_CXT.x_dl_last_error = newSVpvn("", 0); |
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95 | dl_nonlazy = 0; |
96 | #ifdef DL_LOADONCEONLY |
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97 | dl_loaded_files = NULL; |
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98 | #endif |
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99 | #ifdef DEBUGGING |
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100 | { |
101 | SV *sv = get_sv("DynaLoader::dl_debug", 0); |
102 | dl_debug = sv ? SvIV(sv) : 0; |
103 | } |
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104 | #endif |
105 | if ( (perl_dl_nonlazy = getenv("PERL_DL_NONLAZY")) != NULL ) |
106 | dl_nonlazy = atoi(perl_dl_nonlazy); |
107 | if (dl_nonlazy) |
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108 | DLDEBUG(1,PerlIO_printf(Perl_debug_log, "DynaLoader bind mode is 'non-lazy'\n")); |
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109 | #ifdef DL_LOADONCEONLY |
110 | if (!dl_loaded_files) |
111 | dl_loaded_files = newHV(); /* provide cache for dl_*.xs if needed */ |
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112 | #endif |
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113 | #ifdef DL_UNLOAD_ALL_AT_EXIT |
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114 | call_atexit(&dl_unload_all_files, (void*)0); |
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115 | #endif |
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116 | } |
117 | |
118 | |
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119 | #ifndef SYMBIAN |
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120 | /* SaveError() takes printf style args and saves the result in dl_last_error */ |
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121 | static void |
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122 | SaveError(pTHX_ const char* pat, ...) |
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123 | { |
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124 | dMY_CXT; |
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125 | va_list args; |
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126 | SV *msv; |
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127 | const char *message; |
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128 | STRLEN len; |
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129 | |
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130 | /* This code is based on croak/warn, see mess() in util.c */ |
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131 | |
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132 | va_start(args, pat); |
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133 | msv = vmess(pat, &args); |
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134 | va_end(args); |
135 | |
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136 | message = SvPV(msv,len); |
137 | len++; /* include terminating null char */ |
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138 | |
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139 | /* Copy message into dl_last_error (including terminating null char) */ |
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140 | sv_setpvn(MY_CXT.x_dl_last_error, message, len) ; |
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141 | DLDEBUG(2,PerlIO_printf(Perl_debug_log, "DynaLoader: stored error msg '%s'\n",dl_last_error)); |
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142 | } |
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143 | #endif |
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144 | |