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/*
* Copyright (c) 2019, The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of The Linux Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "AEEatomic.h"
#ifdef _WIN32
#include "Windows.h"
uint32 atomic_CompareAndExchange(uint32 * volatile puDest, uint32 uExchange, uint32 uCompare) {
C_ASSERT(sizeof(LONG) == sizeof(uint32));
return (uint32)InterlockedCompareExchange((LONG*)puDest, (LONG)uExchange, (LONG)uCompare);
}
uintptr_t atomic_CompareAndExchangeUP(uintptr_t * volatile puDest, uintptr_t uExchange, uintptr_t uCompare) {
C_ASSERT(sizeof(uintptr_t) == sizeof(void*));
return (uintptr_t)InterlockedCompareExchangePointer((void**)puDest, (void*)uExchange, (void*)uCompare);
}
#elif __hexagon__
#ifndef C_ASSERT
#define C_ASSERT(test) \
switch(0) {\
case 0:\
case test:;\
}
#endif
static inline unsigned int
qurt_atomic_compare_val_and_set(unsigned int* target,
unsigned int old_val,
unsigned int new_val)
{
unsigned int current_val;
__asm__ __volatile__(
"1: %0 = memw_locked(%2)\n"
" p0 = cmp.eq(%0, %3)\n"
" if !p0 jump 2f\n"
" memw_locked(%2, p0) = %4\n"
" if !p0 jump 1b\n"
"2:\n"
: "=&r" (current_val),"+m" (*target)
: "r" (target), "r" (old_val), "r" (new_val)
: "p0");
return current_val;
}
uint32 atomic_CompareAndExchange(uint32 * volatile puDest, uint32 uExchange, uint32 uCompare) {
return (uint32)qurt_atomic_compare_val_and_set((unsigned int*)puDest, uCompare, uExchange);
}
uintptr_t atomic_CompareAndExchangeUP(uintptr_t * volatile puDest, uintptr_t uExchange, uintptr_t uCompare) {
C_ASSERT(sizeof(uintptr_t) == sizeof(uint32));
return (uint32)atomic_CompareAndExchange((uint32*)puDest, (uint32)uExchange, (uint32)uCompare);
}
#elif __GNUC__
uint32 atomic_CompareAndExchange(uint32 * volatile puDest, uint32 uExchange, uint32 uCompare) {
return __sync_val_compare_and_swap(puDest, uCompare, uExchange);
}
uint64 atomic_CompareAndExchange64(uint64 * volatile puDest, uint64 uExchange, uint64 uCompare) {
return __sync_val_compare_and_swap(puDest, uCompare, uExchange);
}
uintptr_t atomic_CompareAndExchangeUP(uintptr_t * volatile puDest, uintptr_t uExchange, uintptr_t uCompare) {
return __sync_val_compare_and_swap(puDest, uCompare, uExchange);
}
#endif //compare and exchange
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