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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
*
*/
/* 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_error */
#define DLDEBUG(level,code) if (dl_debug>=level) { code; }
#else
#define DLDEBUG(level,code)
#endif
static void
dl_generic_private_init() /* called by dl_*.xs dl_private_init() */
{
char *perl_dl_nonlazy;
#ifdef DEBUGGING
dl_debug = SvIV( perl_get_sv("DynaLoader::dl_debug", 0x04) );
#endif
if ( (perl_dl_nonlazy = getenv("PERL_DL_NONLAZY")) != NULL )
dl_nonlazy = atoi(perl_dl_nonlazy);
if (dl_nonlazy)
DLDEBUG(1,PerlIO_printf(PerlIO_stderr(), "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
}
/* SaveError() takes printf style args and saves the result in LastError */
#ifdef STANDARD_C
static void
SaveError(char* pat, ...)
#else
/*VARARGS0*/
static void
SaveError(pat, va_alist)
char *pat;
va_dcl
#endif
{
va_list args;
char *message;
int len;
/* This code is based on croak/warn, see mess() in util.c */
#ifdef I_STDARG
va_start(args, pat);
#else
va_start(args);
#endif
message = mess(pat, &args);
va_end(args);
len = strlen(message) + 1 ; /* 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(PerlIO_stderr(), "DynaLoader: stored error msg '%s'\n",LastError));
}
/* prepend underscore to s. write into buf. return buf. */
char *
dl_add_underscore(s, buf)
char *s;
char *buf;
{
*buf = '_';
(void)strcpy(buf + 1, s);
return buf;
}
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