107 lines
2.8 KiB
C
107 lines
2.8 KiB
C
/* 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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/* pointer to allocated memory for last error message */
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static char *LastError = (char*)NULL;
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/* flag for immediate rather than lazy linking (spots unresolved symbol) */
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static int dl_nonlazy = 0;
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#ifdef DL_LOADONCEONLY
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static HV *dl_loaded_files = Nullhv; /* only needed on a few systems */
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#endif
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#ifdef DEBUGGING
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static int dl_debug = 0; /* value copied from $DynaLoader::dl_debug */
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#define DLDEBUG(level,code) if (dl_debug>=level) { code; }
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#else
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#define DLDEBUG(level,code)
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#endif
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/* Close all dlopen'd files */
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static void
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dl_unload_all_files(pTHXo_ 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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static void
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dl_generic_private_init(pTHXo) /* called by dl_*.xs dl_private_init() */
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{
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char *perl_dl_nonlazy;
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#ifdef DEBUGGING
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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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#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 LastError */
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static void
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SaveError(pTHXo_ char* pat, ...)
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{
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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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/* Allocate some memory for the error message */
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if (LastError)
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LastError = (char*)saferealloc(LastError, len) ;
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else
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LastError = (char *) safemalloc(len) ;
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/* Copy message into LastError (including terminating null char) */
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strncpy(LastError, message, len) ;
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DLDEBUG(2,PerlIO_printf(Perl_debug_log, "DynaLoader: stored error msg '%s'\n",LastError));
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}
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