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Diffstat (limited to '3rdparty/SDL2/src/atomic/SDL_spinlock.c')
-rw-r--r--3rdparty/SDL2/src/atomic/SDL_spinlock.c135
1 files changed, 0 insertions, 135 deletions
diff --git a/3rdparty/SDL2/src/atomic/SDL_spinlock.c b/3rdparty/SDL2/src/atomic/SDL_spinlock.c
deleted file mode 100644
index f582afb4e2c..00000000000
--- a/3rdparty/SDL2/src/atomic/SDL_spinlock.c
+++ /dev/null
@@ -1,135 +0,0 @@
-/*
- 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"
-
-#if defined(__WIN32__) || defined(__WINRT__)
-#include "../core/windows/SDL_windows.h"
-#endif
-
-#include "SDL_atomic.h"
-#include "SDL_mutex.h"
-#include "SDL_timer.h"
-
-#if !defined(HAVE_GCC_ATOMICS) && defined(__SOLARIS__)
-#include <atomic.h>
-#endif
-
-/* This function is where all the magic happens... */
-SDL_bool
-SDL_AtomicTryLock(SDL_SpinLock *lock)
-{
-#if SDL_ATOMIC_DISABLED
- /* Terrible terrible damage */
- static SDL_mutex *_spinlock_mutex;
-
- if (!_spinlock_mutex) {
- /* Race condition on first lock... */
- _spinlock_mutex = SDL_CreateMutex();
- }
- SDL_LockMutex(_spinlock_mutex);
- if (*lock == 0) {
- *lock = 1;
- SDL_UnlockMutex(_spinlock_mutex);
- return SDL_TRUE;
- } else {
- SDL_UnlockMutex(_spinlock_mutex);
- return SDL_FALSE;
- }
-
-#elif defined(_MSC_VER)
- SDL_COMPILE_TIME_ASSERT(locksize, sizeof(*lock) == sizeof(long));
- return (InterlockedExchange((long*)lock, 1) == 0);
-
-#elif HAVE_GCC_ATOMICS || HAVE_GCC_SYNC_LOCK_TEST_AND_SET
- return (__sync_lock_test_and_set(lock, 1) == 0);
-
-#elif defined(__GNUC__) && defined(__arm__) && \
- (defined(__ARM_ARCH_4__) || defined(__ARM_ARCH_4T__) || \
- defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_5TE__) || \
- defined(__ARM_ARCH_5TEJ__))
- int result;
- __asm__ __volatile__ (
- "swp %0, %1, [%2]\n"
- : "=&r,&r" (result) : "r,0" (1), "r,r" (lock) : "memory");
- return (result == 0);
-
-#elif defined(__GNUC__) && defined(__arm__)
- int result;
- __asm__ __volatile__ (
- "ldrex %0, [%2]\nteq %0, #0\nstrexeq %0, %1, [%2]"
- : "=&r" (result) : "r" (1), "r" (lock) : "cc", "memory");
- return (result == 0);
-
-#elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
- int result;
- __asm__ __volatile__(
- "lock ; xchgl %0, (%1)\n"
- : "=r" (result) : "r" (lock), "0" (1) : "cc", "memory");
- return (result == 0);
-
-#elif defined(__MACOSX__) || defined(__IPHONEOS__)
- /* Maybe used for PowerPC, but the Intel asm or gcc atomics are favored. */
- return OSAtomicCompareAndSwap32Barrier(0, 1, lock);
-
-#elif defined(__SOLARIS__) && defined(_LP64)
- /* Used for Solaris with non-gcc compilers. */
- return (SDL_bool) ((int) atomic_cas_64((volatile uint64_t*)lock, 0, 1) == 0);
-
-#elif defined(__SOLARIS__) && !defined(_LP64)
- /* Used for Solaris with non-gcc compilers. */
- return (SDL_bool) ((int) atomic_cas_32((volatile uint32_t*)lock, 0, 1) == 0);
-
-#else
-#error Please implement for your platform.
- return SDL_FALSE;
-#endif
-}
-
-void
-SDL_AtomicLock(SDL_SpinLock *lock)
-{
- /* FIXME: Should we have an eventual timeout? */
- while (!SDL_AtomicTryLock(lock)) {
- SDL_Delay(0);
- }
-}
-
-void
-SDL_AtomicUnlock(SDL_SpinLock *lock)
-{
-#if defined(_MSC_VER)
- _ReadWriteBarrier();
- *lock = 0;
-
-#elif HAVE_GCC_ATOMICS || HAVE_GCC_SYNC_LOCK_TEST_AND_SET
- __sync_lock_release(lock);
-
-#elif defined(__SOLARIS__)
- /* Used for Solaris when not using gcc. */
- *lock = 0;
- membar_producer();
-
-#else
- *lock = 0;
-#endif
-}
-
-/* vi: set ts=4 sw=4 expandtab: */