Sven Balzer
86 lines
2.7 KiB
C
86 lines
2.7 KiB
C
#if !defined(MIX_LOADER_FUNCTIONS) || !defined(MIX_LOADER_MODULE)
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#error Please define MIX_LOADER_FUNCTIONS and MIX_LOADER_MODULE before including this file.
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#else
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#define MIX_LOADER_SYMCOMBINE2(a, b) a##b
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#define MIX_LOADER_SYMCOMBINE(a, b) MIX_LOADER_SYMCOMBINE2(a, b)
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typedef struct {
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int refcount;
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void *handle;
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#define MIX_LOADER_FUNCTION(required,ret,fn,args) ret (*fn) args;
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MIX_LOADER_FUNCTIONS
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#undef MIX_LOADER_FUNCTION
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} MIX_LOADER_SYMCOMBINE(MIX_LOADER_MODULE, _loader);
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static MIX_LOADER_SYMCOMBINE(MIX_LOADER_MODULE, _loader) MIX_LOADER_MODULE;
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static void MIX_LOADER_SYMCOMBINE(UnloadModule_, MIX_LOADER_MODULE)(void)
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{
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if (--MIX_LOADER_MODULE.refcount <= 0) {
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#define MIX_LOADER_FUNCTION(required,ret,fn,args) MIX_LOADER_MODULE.fn = NULL;
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MIX_LOADER_FUNCTIONS
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#undef MIX_LOADER_FUNCTION
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#ifdef MIX_LOADER_DYNAMIC
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if (MIX_LOADER_MODULE.handle) {
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SDL_UnloadObject(MIX_LOADER_MODULE.handle);
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MIX_LOADER_MODULE.handle = NULL;
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}
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#endif
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MIX_LOADER_MODULE.refcount = 0; // just in case.
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}
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}
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#ifdef __APPLE__ // Need to turn off optimizations so weak framework load check works, apparently.
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__attribute__ ((optnone))
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#endif
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static bool MIX_LOADER_SYMCOMBINE(LoadModule_, MIX_LOADER_MODULE)(void)
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{
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bool retval = true;
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if (MIX_LOADER_MODULE.refcount++ == 0) {
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#ifdef MIX_LOADER_DYNAMIC
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MIX_LOADER_MODULE.handle = SDL_LoadObject(MIX_LOADER_DYNAMIC);
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if (MIX_LOADER_MODULE.handle == NULL) {
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MIX_LOADER_MODULE.refcount--;
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return false;
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}
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#define MIX_LOADER_FUNCTION(required,ret,fn,args) \
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MIX_LOADER_MODULE.fn = (ret(*)args) SDL_LoadFunction(MIX_LOADER_MODULE.handle, #fn); \
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if ((MIX_LOADER_MODULE.fn == NULL) && ((required))) { \
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SDL_SetError("Missing %s in library " MIX_LOADER_DYNAMIC, #fn); \
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retval = false; \
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}
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#else
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#define MIX_LOADER_FUNCTION(required,ret,fn,args) \
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MIX_LOADER_MODULE.fn = fn; \
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if ((MIX_LOADER_MODULE.fn == NULL) && ((required))) { \
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SDL_SetError("Missing " SDL_STRINGIFY_ARG(MIX_LOADER_MODULE) " framework"); \
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retval = false; \
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}
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#endif
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MIX_LOADER_FUNCTIONS
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#undef MIX_LOADER_FUNCTION
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if (!retval) {
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MIX_LOADER_SYMCOMBINE(UnloadModule_, MIX_LOADER_MODULE)();
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}
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}
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return retval;
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}
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#undef MIX_LOADER_SYMCOMBINE2
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#undef MIX_LOADER_SYMCOMBINE
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#undef MIX_LOADER_FUNCTIONS
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#undef MIX_LOADER_MODULE
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#ifdef MIX_LOADER_DYNAMIC
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#undef MIX_LOADER_DYNAMIC
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#endif
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#endif
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