157 lines
3.8 KiB
C
157 lines
3.8 KiB
C
/*
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* Cross Platform dso/dll load abstraction
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* Copyright(C) 2008 Michael Jerris
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so.
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*
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* This work is provided under this license on an "as is" basis, without warranty of any kind,
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* either expressed or implied, including, without limitation, warranties that the covered code
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* is free of defects, merchantable, fit for a particular purpose or non-infringing. The entire
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* risk as to the quality and performance of the covered code is with you. Should any covered
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* code prove defective in any respect, you (not the initial developer or any other contributor)
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* assume the cost of any necessary servicing, repair or correction. This disclaimer of warranty
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* constitutes an essential part of this license. No use of any covered code is authorized hereunder
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* except under this disclaimer.
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*
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*/
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#include <switch.h>
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#include "switch_dso.h"
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#include <stdlib.h>
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#include <string.h>
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#ifdef WIN32
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SWITCH_DECLARE(void) switch_dso_destroy(switch_dso_lib_t *lib)
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{
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if (lib && *lib) {
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FreeLibrary(*lib);
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*lib = NULL;
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}
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}
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SWITCH_DECLARE(switch_dso_lib_t) switch_dso_open(const char *path, int global, char **err)
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{
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HINSTANCE lib;
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lib = LoadLibraryEx(path, NULL, 0);
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if (!lib) {
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LoadLibraryEx(path, NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
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}
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if (!lib) {
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DWORD error = GetLastError();
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*err = switch_mprintf("dll open error [%ul]\n", error);
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}
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return lib;
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}
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SWITCH_DECLARE(switch_dso_func_t) switch_dso_func_sym(switch_dso_lib_t lib, const char *sym, char **err)
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{
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FARPROC func = GetProcAddress(lib, sym);
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if (!func) {
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DWORD error = GetLastError();
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*err = switch_mprintf("dll sym error [%ul]\n", error);
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}
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return (switch_dso_func_t) func;
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}
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SWITCH_DECLARE(void *) switch_dso_data_sym(switch_dso_lib_t lib, const char *sym, char **err)
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{
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FARPROC addr = GetProcAddress(lib, sym);
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if (!addr) {
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DWORD error = GetLastError();
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*err = switch_mprintf("dll sym error [%ul]\n", error);
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}
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return (void *) (intptr_t) addr;
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}
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#else
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/*
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** {========================================================================
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** This is an implementation of loadlib based on the dlfcn interface.
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** The dlfcn interface is available in Linux, SunOS, Solaris, IRIX, FreeBSD,
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** NetBSD, AIX 4.2, HPUX 11, and probably most other Unix flavors, at least
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** as an emulation layer on top of native functions.
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** =========================================================================
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*/
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#include <dlfcn.h>
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void switch_dso_destroy(switch_dso_lib_t *lib)
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{
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if (lib && *lib) {
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dlclose(*lib);
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*lib = NULL;
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}
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}
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switch_dso_lib_t switch_dso_open(const char *path, int global, char **err)
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{
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void *lib;
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if (global) {
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lib = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
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} else {
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lib = dlopen(path, RTLD_NOW | RTLD_LOCAL);
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}
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if (lib == NULL) {
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const char *dlerr = dlerror();
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/* Work around broken uclibc returning NULL on both dlopen() and dlerror() */
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if (dlerr) {
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*err = strdup(dlerr);
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} else {
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*err = strdup("Unknown error");
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}
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}
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return lib;
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}
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switch_dso_func_t switch_dso_func_sym(switch_dso_lib_t lib, const char *sym, char **err)
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{
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void *func = dlsym(lib, sym);
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if (!func) {
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*err = strdup(dlerror());
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}
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return (switch_dso_func_t) (intptr_t) func;
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}
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void *switch_dso_data_sym(switch_dso_lib_t lib, const char *sym, char **err)
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{
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void *addr = dlsym(lib, sym);
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if (!addr) {
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char *err_str = NULL;
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dlerror();
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if (!(addr = dlsym(lib, sym))) {
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err_str = (char *)dlerror();
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}
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if (err_str) {
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*err = strdup(err_str);
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}
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}
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return addr;
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}
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#endif
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/* }====================================================== */
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/* For Emacs:
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* Local Variables:
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* mode:c
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* indent-tabs-mode:t
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* tab-width:4
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* c-basic-offset:4
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* End:
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* For VIM:
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* vim:set softtabstop=4 shiftwidth=4 tabstop=4 noet
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*/
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