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