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root |
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/* dlutils.c - handy functions and definitions for dl_*.xs files |
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* |
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* Currently this file is simply #included into dl_*.xs/.c files. |
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* It should really be split into a dlutils.h and dlutils.c |
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* |
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* Modified: |
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* 29th Feburary 2000 - Alan Burlison: Added functionality to close dlopen'd |
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* files when the interpreter exits |
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*/ |
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#ifndef XS_VERSION |
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# define XS_VERSION "0" |
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#endif |
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#define MY_CXT_KEY "DynaLoader::_guts" XS_VERSION |
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typedef struct { |
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SV* x_dl_last_error; /* pointer to allocated memory for |
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last error message */ |
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int x_dl_nonlazy; /* flag for immediate rather than lazy |
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linking (spots unresolved symbol) */ |
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#ifdef DL_LOADONCEONLY |
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HV * x_dl_loaded_files; /* only needed on a few systems */ |
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#endif |
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#ifdef DL_CXT_EXTRA |
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my_cxtx_t x_dl_cxtx; /* extra platform-specific data */ |
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#endif |
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#ifdef DEBUGGING |
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int x_dl_debug; /* value copied from $DynaLoader::dl_debug */ |
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#endif |
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} my_cxt_t; |
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START_MY_CXT |
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#define dl_last_error (SvPVX(MY_CXT.x_dl_last_error)) |
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#define dl_nonlazy (MY_CXT.x_dl_nonlazy) |
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#ifdef DL_LOADONCEONLY |
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#define dl_loaded_files (MY_CXT.x_dl_loaded_files) |
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#endif |
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#ifdef DL_CXT_EXTRA |
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#define dl_cxtx (MY_CXT.x_dl_cxtx) |
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#endif |
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#ifdef DEBUGGING |
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#define dl_debug (MY_CXT.x_dl_debug) |
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#endif |
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#ifdef DEBUGGING |
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#define DLDEBUG(level,code) \ |
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STMT_START { \ |
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dMY_CXT; \ |
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if (dl_debug>=level) { code; } \ |
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} STMT_END |
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#else |
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#define DLDEBUG(level,code) NOOP |
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#endif |
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#ifdef DL_UNLOAD_ALL_AT_EXIT |
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/* Close all dlopen'd files */ |
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static void |
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dl_unload_all_files(pTHX_ void *unused) |
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{ |
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CV *sub; |
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AV *dl_librefs; |
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SV *dl_libref; |
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if ((sub = get_cv("DynaLoader::dl_unload_file", FALSE)) != NULL) { |
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dl_librefs = get_av("DynaLoader::dl_librefs", FALSE); |
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while ((dl_libref = av_pop(dl_librefs)) != &PL_sv_undef) { |
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dSP; |
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ENTER; |
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SAVETMPS; |
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PUSHMARK(SP); |
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XPUSHs(sv_2mortal(dl_libref)); |
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PUTBACK; |
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call_sv((SV*)sub, G_DISCARD | G_NODEBUG); |
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FREETMPS; |
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LEAVE; |
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} |
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} |
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} |
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#endif |
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static void |
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dl_generic_private_init(pTHX) /* called by dl_*.xs dl_private_init() */ |
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{ |
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char *perl_dl_nonlazy; |
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MY_CXT_INIT; |
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MY_CXT.x_dl_last_error = newSVpvn("", 0); |
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dl_nonlazy = 0; |
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#ifdef DL_LOADONCEONLY |
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dl_loaded_files = Nullhv; |
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#endif |
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#ifdef DEBUGGING |
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{ |
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SV *sv = get_sv("DynaLoader::dl_debug", 0); |
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dl_debug = sv ? SvIV(sv) : 0; |
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} |
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#endif |
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if ( (perl_dl_nonlazy = getenv("PERL_DL_NONLAZY")) != NULL ) |
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dl_nonlazy = atoi(perl_dl_nonlazy); |
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if (dl_nonlazy) |
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DLDEBUG(1,PerlIO_printf(Perl_debug_log, "DynaLoader bind mode is 'non-lazy'\n")); |
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#ifdef DL_LOADONCEONLY |
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if (!dl_loaded_files) |
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dl_loaded_files = newHV(); /* provide cache for dl_*.xs if needed */ |
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#endif |
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#ifdef DL_UNLOAD_ALL_AT_EXIT |
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call_atexit(&dl_unload_all_files, (void*)0); |
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#endif |
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} |
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/* SaveError() takes printf style args and saves the result in dl_last_error */ |
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static void |
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SaveError(pTHX_ char* pat, ...) |
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{ |
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dMY_CXT; |
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va_list args; |
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SV *msv; |
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char *message; |
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STRLEN len; |
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/* This code is based on croak/warn, see mess() in util.c */ |
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va_start(args, pat); |
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msv = vmess(pat, &args); |
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va_end(args); |
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message = SvPV(msv,len); |
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len++; /* include terminating null char */ |
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/* Copy message into dl_last_error (including terminating null char) */ |
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sv_setpvn(MY_CXT.x_dl_last_error, message, len) ; |
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DLDEBUG(2,PerlIO_printf(Perl_debug_log, "DynaLoader: stored error msg '%s'\n",dl_last_error)); |
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} |
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