/* * Mesa 3-D graphics library * * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /** * Wrapper functions for dlopen(), dlsym(), dlclose(). * Note that the #ifdef tests for various environments should be expanded. */ #include "compiler.h" #include "dlopen.h" #if defined(_GNU_SOURCE) && !defined(__MINGW32__) && !defined(__blrts) #include <dlfcn.h> #endif #if defined(_WIN32) #include <windows.h> #endif /** * Wrapper for dlopen(). * Note that 'flags' isn't used at this time. */ void * _mesa_dlopen(const char *libname, int flags) { #if defined(__blrts) return NULL; #elif defined(_GNU_SOURCE) flags = RTLD_LAZY | RTLD_GLOBAL; /* Overriding flags at this time */ return dlopen(libname, flags); #elif defined(__MINGW32__) return LoadLibraryA(libname); #else return NULL; #endif } /** * Wrapper for dlsym() that does a cast to a generic function type, * rather than a void *. This reduces the number of warnings that are * generated. */ GenericFunc _mesa_dlsym(void *handle, const char *fname) { union { void *v; GenericFunc f; } u; #if defined(__blrts) u.v = NULL; #elif defined(__DJGPP__) /* need '_' prefix on symbol names */ char fname2[1000]; fname2[0] = '_'; strncpy(fname2 + 1, fname, 998); fname2[999] = 0; u.v = dlsym(handle, fname2); #elif defined(_GNU_SOURCE) u.v = dlsym(handle, fname); #elif defined(__MINGW32__) u.v = (void *) GetProcAddress(handle, fname); #else u.v = NULL; #endif return u.f; } /** * Wrapper for dlclose(). */ void _mesa_dlclose(void *handle) { #if defined(__blrts) (void) handle; #elif defined(_GNU_SOURCE) dlclose(handle); #elif defined(__MINGW32__) FreeLibrary(handle); #else (void) handle; #endif }