| Commit | Line | Data |
|---|
| a0d0e21e |
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 | * |
| 6 | */ |
| 7 | |
| 8 | |
| 9 | /* pointer to allocated memory for last error message */ |
| 10 | static char *LastError = (char*)NULL; |
| 11 | |
| 8e07c86e |
12 | /* flag for immediate rather than lazy linking (spots unresolved symbol) */ |
| 13 | static int dl_nonlazy = 0; |
| 14 | |
| 15 | #ifdef DL_LOADONCEONLY |
| 16 | static HV *dl_loaded_files = Nullhv; /* only needed on a few systems */ |
| 17 | #endif |
| a0d0e21e |
18 | |
| 19 | |
| 20 | #ifdef DEBUGGING |
| 8e07c86e |
21 | static int dl_debug = 0; /* value copied from $DynaLoader::dl_error */ |
| 22 | #define DLDEBUG(level,code) if (dl_debug>=level) { code; } |
| a0d0e21e |
23 | #else |
| 24 | #define DLDEBUG(level,code) |
| 25 | #endif |
| 26 | |
| 27 | |
| 28 | static void |
| 29 | dl_generic_private_init() /* called by dl_*.xs dl_private_init() */ |
| 30 | { |
| 8e07c86e |
31 | char *perl_dl_nonlazy; |
| a0d0e21e |
32 | #ifdef DEBUGGING |
| 8e07c86e |
33 | dl_debug = SvIV( perl_get_sv("DynaLoader::dl_debug", 0x04) ); |
| 34 | #endif |
| 35 | if ( (perl_dl_nonlazy = getenv("PERL_DL_NONLAZY")) != NULL ) |
| 36 | dl_nonlazy = atoi(perl_dl_nonlazy); |
| 37 | if (dl_nonlazy) |
| 38 | DLDEBUG(1,fprintf(stderr,"DynaLoader bind mode is 'non-lazy'\n")); |
| 39 | #ifdef DL_LOADONCEONLY |
| 40 | if (!dl_loaded_files) |
| 41 | dl_loaded_files = newHV(); /* provide cache for dl_*.xs if needed */ |
| a0d0e21e |
42 | #endif |
| 43 | } |
| 44 | |
| 45 | |
| 46 | /* SaveError() takes printf style args and saves the result in LastError */ |
| 47 | #ifdef STANDARD_C |
| 48 | static void |
| 49 | SaveError(char* pat, ...) |
| 50 | #else |
| 51 | /*VARARGS0*/ |
| 52 | static void |
| 53 | SaveError(pat, va_alist) |
| 54 | char *pat; |
| 55 | va_dcl |
| 56 | #endif |
| 57 | { |
| 58 | va_list args; |
| 59 | char *message; |
| 60 | int len; |
| 61 | |
| 8e07c86e |
62 | /* This code is based on croak/warn, see mess() in util.c */ |
| a0d0e21e |
63 | |
| 64 | #ifdef I_STDARG |
| 65 | va_start(args, pat); |
| 66 | #else |
| 67 | va_start(args); |
| 68 | #endif |
| 69 | message = mess(pat, &args); |
| 70 | va_end(args); |
| 71 | |
| 72 | len = strlen(message) + 1 ; /* include terminating null char */ |
| 73 | |
| 74 | /* Allocate some memory for the error message */ |
| 75 | if (LastError) |
| 76 | LastError = (char*)saferealloc(LastError, len) ; |
| 77 | else |
| 78 | LastError = safemalloc(len) ; |
| 79 | |
| 80 | /* Copy message into LastError (including terminating null char) */ |
| 81 | strncpy(LastError, message, len) ; |
| 82 | DLDEBUG(2,fprintf(stderr,"DynaLoader: stored error msg '%s'\n",LastError)); |
| 83 | } |
| 84 | |
| 85 | |
| 86 | /* prepend underscore to s. write into buf. return buf. */ |
| 87 | char * |
| 88 | dl_add_underscore(s, buf) |
| 89 | char *s; |
| 90 | char *buf; |
| 91 | { |
| 92 | *buf = '_'; |
| 93 | (void)strcpy(buf + 1, s); |
| 94 | return buf; |
| 95 | } |
| 96 | |
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