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Diffstat (limited to '3rdparty/SDL2/src/atomic/SDL_atomic.c')
-rw-r--r--3rdparty/SDL2/src/atomic/SDL_atomic.c246
1 files changed, 0 insertions, 246 deletions
diff --git a/3rdparty/SDL2/src/atomic/SDL_atomic.c b/3rdparty/SDL2/src/atomic/SDL_atomic.c
deleted file mode 100644
index db86d6eda82..00000000000
--- a/3rdparty/SDL2/src/atomic/SDL_atomic.c
+++ /dev/null
@@ -1,246 +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"
-
-#include "SDL_atomic.h"
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1500)
-#include <intrin.h>
-#define HAVE_MSC_ATOMICS 1
-#endif
-
-#if defined(__MACOSX__) /* !!! FIXME: should we favor gcc atomics? */
-#include <libkern/OSAtomic.h>
-#endif
-
-#if !defined(HAVE_GCC_ATOMICS) && defined(__SOLARIS__)
-#include <atomic.h>
-#endif
-
-/*
- If any of the operations are not provided then we must emulate some
- of them. That means we need a nice implementation of spin locks
- that avoids the "one big lock" problem. We use a vector of spin
- locks and pick which one to use based on the address of the operand
- of the function.
-
- To generate the index of the lock we first shift by 3 bits to get
- rid on the zero bits that result from 32 and 64 bit allignment of
- data. We then mask off all but 5 bits and use those 5 bits as an
- index into the table.
-
- Picking the lock this way insures that accesses to the same data at
- the same time will go to the same lock. OTOH, accesses to different
- data have only a 1/32 chance of hitting the same lock. That should
- pretty much eliminate the chances of several atomic operations on
- different data from waiting on the same "big lock". If it isn't
- then the table of locks can be expanded to a new size so long as
- the new size is a power of two.
-
- Contributed by Bob Pendleton, bob@pendleton.com
-*/
-
-#if !defined(HAVE_MSC_ATOMICS) && !defined(HAVE_GCC_ATOMICS) && !defined(__MACOSX__) && !defined(__SOLARIS__)
-#define EMULATE_CAS 1
-#endif
-
-#if EMULATE_CAS
-static SDL_SpinLock locks[32];
-
-static SDL_INLINE void
-enterLock(void *a)
-{
- uintptr_t index = ((((uintptr_t)a) >> 3) & 0x1f);
-
- SDL_AtomicLock(&locks[index]);
-}
-
-static SDL_INLINE void
-leaveLock(void *a)
-{
- uintptr_t index = ((((uintptr_t)a) >> 3) & 0x1f);
-
- SDL_AtomicUnlock(&locks[index]);
-}
-#endif
-
-
-SDL_bool
-SDL_AtomicCAS(SDL_atomic_t *a, int oldval, int newval)
-{
-#ifdef HAVE_MSC_ATOMICS
- return (_InterlockedCompareExchange((long*)&a->value, (long)newval, (long)oldval) == (long)oldval);
-#elif defined(__MACOSX__) /* !!! FIXME: should we favor gcc atomics? */
- return (SDL_bool) OSAtomicCompareAndSwap32Barrier(oldval, newval, &a->value);
-#elif defined(HAVE_GCC_ATOMICS)
- return (SDL_bool) __sync_bool_compare_and_swap(&a->value, oldval, newval);
-#elif defined(__SOLARIS__) && defined(_LP64)
- return (SDL_bool) ((int) atomic_cas_64((volatile uint64_t*)&a->value, (uint64_t)oldval, (uint64_t)newval) == oldval);
-#elif defined(__SOLARIS__) && !defined(_LP64)
- return (SDL_bool) ((int) atomic_cas_32((volatile uint32_t*)&a->value, (uint32_t)oldval, (uint32_t)newval) == oldval);
-#elif EMULATE_CAS
- SDL_bool retval = SDL_FALSE;
-
- enterLock(a);
- if (a->value == oldval) {
- a->value = newval;
- retval = SDL_TRUE;
- }
- leaveLock(a);
-
- return retval;
-#else
- #error Please define your platform.
-#endif
-}
-
-SDL_bool
-SDL_AtomicCASPtr(void **a, void *oldval, void *newval)
-{
-#if defined(HAVE_MSC_ATOMICS) && (_M_IX86)
- return (_InterlockedCompareExchange((long*)a, (long)newval, (long)oldval) == (long)oldval);
-#elif defined(HAVE_MSC_ATOMICS) && (!_M_IX86)
- return (_InterlockedCompareExchangePointer(a, newval, oldval) == oldval);
-#elif defined(__MACOSX__) && defined(__LP64__) /* !!! FIXME: should we favor gcc atomics? */
- return (SDL_bool) OSAtomicCompareAndSwap64Barrier((int64_t)oldval, (int64_t)newval, (int64_t*) a);
-#elif defined(__MACOSX__) && !defined(__LP64__) /* !!! FIXME: should we favor gcc atomics? */
- return (SDL_bool) OSAtomicCompareAndSwap32Barrier((int32_t)oldval, (int32_t)newval, (int32_t*) a);
-#elif defined(HAVE_GCC_ATOMICS)
- return __sync_bool_compare_and_swap(a, oldval, newval);
-#elif defined(__SOLARIS__)
- return (SDL_bool) (atomic_cas_ptr(a, oldval, newval) == oldval);
-#elif EMULATE_CAS
- SDL_bool retval = SDL_FALSE;
-
- enterLock(a);
- if (*a == oldval) {
- *a = newval;
- retval = SDL_TRUE;
- }
- leaveLock(a);
-
- return retval;
-#else
- #error Please define your platform.
-#endif
-}
-
-int
-SDL_AtomicSet(SDL_atomic_t *a, int v)
-{
-#ifdef HAVE_MSC_ATOMICS
- return _InterlockedExchange((long*)&a->value, v);
-#elif defined(HAVE_GCC_ATOMICS)
- return __sync_lock_test_and_set(&a->value, v);
-#elif defined(__SOLARIS__) && defined(_LP64)
- return (int) atomic_swap_64((volatile uint64_t*)&a->value, (uint64_t)v);
-#elif defined(__SOLARIS__) && !defined(_LP64)
- return (int) atomic_swap_32((volatile uint32_t*)&a->value, (uint32_t)v);
-#else
- int value;
- do {
- value = a->value;
- } while (!SDL_AtomicCAS(a, value, v));
- return value;
-#endif
-}
-
-void*
-SDL_AtomicSetPtr(void **a, void *v)
-{
-#if defined(HAVE_MSC_ATOMICS) && (_M_IX86)
- return (void *) _InterlockedExchange((long *)a, (long) v);
-#elif defined(HAVE_MSC_ATOMICS) && (!_M_IX86)
- return _InterlockedExchangePointer(a, v);
-#elif defined(HAVE_GCC_ATOMICS)
- return __sync_lock_test_and_set(a, v);
-#elif defined(__SOLARIS__)
- return atomic_swap_ptr(a, v);
-#else
- void *value;
- do {
- value = *a;
- } while (!SDL_AtomicCASPtr(a, value, v));
- return value;
-#endif
-}
-
-int
-SDL_AtomicAdd(SDL_atomic_t *a, int v)
-{
-#ifdef HAVE_MSC_ATOMICS
- return _InterlockedExchangeAdd((long*)&a->value, v);
-#elif defined(HAVE_GCC_ATOMICS)
- return __sync_fetch_and_add(&a->value, v);
-#elif defined(__SOLARIS__)
- int pv = a->value;
- membar_consumer();
-#if defined(_LP64)
- atomic_add_64((volatile uint64_t*)&a->value, v);
-#elif !defined(_LP64)
- atomic_add_32((volatile uint32_t*)&a->value, v);
-#endif
- return pv;
-#else
- int value;
- do {
- value = a->value;
- } while (!SDL_AtomicCAS(a, value, (value + v)));
- return value;
-#endif
-}
-
-int
-SDL_AtomicGet(SDL_atomic_t *a)
-{
- int value;
- do {
- value = a->value;
- } while (!SDL_AtomicCAS(a, value, value));
- return value;
-}
-
-void *
-SDL_AtomicGetPtr(void **a)
-{
- void *value;
- do {
- value = *a;
- } while (!SDL_AtomicCASPtr(a, value, value));
- return value;
-}
-
-#ifdef __thumb__
-#if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6T2__) || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__)
-__asm__(
-" .align 2\n"
-" .globl _SDL_MemoryBarrierRelease\n"
-" .globl _SDL_MemoryBarrierAcquire\n"
-"_SDL_MemoryBarrierRelease:\n"
-"_SDL_MemoryBarrierAcquire:\n"
-" mov r0, #0\n"
-" mcr p15, 0, r0, c7, c10, 5\n"
-" bx lr\n"
-);
-#endif
-#endif
-
-/* vi: set ts=4 sw=4 expandtab: */