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Added TLS initialization and shutdown functions

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Fixes https://github.com/libsdl-org/SDL/issues/8576
This commit is contained in:
Sam Lantinga
2024-07-11 10:38:40 -07:00
parent f0ceb92dca
commit b517043936
8 changed files with 171 additions and 67 deletions
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44
src/thread/windows/SDL_systls.c
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@@ -42,27 +42,27 @@
static DWORD thread_local_storage = TLS_OUT_OF_INDEXES;
static SDL_bool generic_local_storage = SDL_FALSE;
SDL_TLSData *SDL_SYS_GetTLSData(void)
void SDL_SYS_InitTLSData(void)
{
if (thread_local_storage == TLS_OUT_OF_INDEXES && !generic_local_storage) {
static SDL_SpinLock lock;
SDL_LockSpinlock(&lock);
if (thread_local_storage == TLS_OUT_OF_INDEXES && !generic_local_storage) {
DWORD storage = TlsAlloc();
if (storage != TLS_OUT_OF_INDEXES) {
SDL_MemoryBarrierRelease();
thread_local_storage = storage;
} else {
generic_local_storage = SDL_TRUE;
}
thread_local_storage = TlsAlloc();
if (thread_local_storage == TLS_OUT_OF_INDEXES) {
SDL_Generic_InitTLSData();
generic_local_storage = SDL_TRUE;
}
SDL_UnlockSpinlock(&lock);
}
}
SDL_TLSData *SDL_SYS_GetTLSData(void)
{
if (generic_local_storage) {
return SDL_Generic_GetTLSData();
}
SDL_MemoryBarrierAcquire();
return (SDL_TLSData *)TlsGetValue(thread_local_storage);
if (thread_local_storage != TLS_OUT_OF_INDEXES) {
return (SDL_TLSData *)TlsGetValue(thread_local_storage);
}
return NULL;
}
int SDL_SYS_SetTLSData(SDL_TLSData *data)
@@ -70,10 +70,24 @@ int SDL_SYS_SetTLSData(SDL_TLSData *data)
if (generic_local_storage) {
return SDL_Generic_SetTLSData(data);
}
if (!TlsSetValue(thread_local_storage, data)) {
return SDL_SetError("TlsSetValue() failed");
return WIN_SetError("TlsSetValue()");
}
return 0;
}
void SDL_SYS_QuitTLSData(void)
{
if (generic_local_storage) {
SDL_Generic_QuitTLSData();
generic_local_storage = SDL_FALSE;
} else {
if (thread_local_storage != TLS_OUT_OF_INDEXES) {
TlsFree(thread_local_storage);
thread_local_storage = TLS_OUT_OF_INDEXES;
}
}
}
#endif /* SDL_THREAD_WINDOWS */