diff options
Diffstat (limited to '3rdparty/SDL2/src/thread/pthread/SDL_systls.c')
-rw-r--r-- | 3rdparty/SDL2/src/thread/pthread/SDL_systls.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/3rdparty/SDL2/src/thread/pthread/SDL_systls.c b/3rdparty/SDL2/src/thread/pthread/SDL_systls.c new file mode 100644 index 00000000000..622ad029758 --- /dev/null +++ b/3rdparty/SDL2/src/thread/pthread/SDL_systls.c @@ -0,0 +1,69 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org> + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. +*/ +#include "../../SDL_internal.h" +#include "SDL_thread.h" +#include "../SDL_thread_c.h" + +#include <pthread.h> + + +#define INVALID_PTHREAD_KEY ((pthread_key_t)-1) + +static pthread_key_t thread_local_storage = INVALID_PTHREAD_KEY; +static SDL_bool generic_local_storage = SDL_FALSE; + +SDL_TLSData * +SDL_SYS_GetTLSData() +{ + if (thread_local_storage == INVALID_PTHREAD_KEY && !generic_local_storage) { + static SDL_SpinLock lock; + SDL_AtomicLock(&lock); + if (thread_local_storage == INVALID_PTHREAD_KEY && !generic_local_storage) { + pthread_key_t storage; + if (pthread_key_create(&storage, NULL) == 0) { + SDL_MemoryBarrierRelease(); + thread_local_storage = storage; + } else { + generic_local_storage = SDL_TRUE; + } + } + SDL_AtomicUnlock(&lock); + } + if (generic_local_storage) { + return SDL_Generic_GetTLSData(); + } + SDL_MemoryBarrierAcquire(); + return (SDL_TLSData *)pthread_getspecific(thread_local_storage); +} + +int +SDL_SYS_SetTLSData(SDL_TLSData *data) +{ + if (generic_local_storage) { + return SDL_Generic_SetTLSData(data); + } + if (pthread_setspecific(thread_local_storage, data) != 0) { + return SDL_SetError("pthread_setspecific() failed"); + } + return 0; +} + +/* vi: set ts=4 sw=4 expandtab: */ |