91 lines
3.2 KiB
C
91 lines
3.2 KiB
C
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2013 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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#ifndef XENIA_ATOMIC_H_
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#define XENIA_ATOMIC_H_
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#include <xenia/platform.h>
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#include <xenia/platform_includes.h>
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// These functions are modeled off of the Apple OSAtomic routines
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// http://developer.apple.com/library/mac/#documentation/DriversKernelHardware/Reference/libkern_ref/OSAtomic_h/
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#if XE_LIKE(OSX)
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#include <libkern/OSAtomic.h>
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#define xe_atomic_inc_32(value) \
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OSAtomicIncrement32Barrier(value)
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#define xe_atomic_dec_32(value) \
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OSAtomicDecrement32Barrier(value)
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#define xe_atomic_add_32(amount, value) \
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((void)OSAtomicAdd32Barrier(amount, value))
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#define xe_atomic_sub_32(amount, value) \
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((void)OSAtomicAdd32Barrier(-amount, value))
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#define xe_atomic_cas_32(oldValue, newValue, value) \
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OSAtomicCompareAndSwap32Barrier(oldValue, newValue, value)
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typedef OSQueueHead xe_atomic_stack_t;
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#define xe_atomic_stack_init(stack) \
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*(stack) = (OSQueueHead)OS_ATOMIC_QUEUE_INIT
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#define xe_atomic_stack_enqueue(stack, item, offset) \
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OSAtomicEnqueue((OSQueueHead*)stack, item, offset)
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#define xe_atomic_stack_dequeue(stack, offset) \
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OSAtomicDequeue((OSQueueHead*)stack, offset)
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#elif XE_LIKE(WIN32)
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#define xe_atomic_inc_32(value) \
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InterlockedIncrement((volatile LONG*)value)
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#define xe_atomic_dec_32(value) \
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InterlockedDecrement((volatile LONG*)value)
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#define xe_atomic_add_32(amount, value) \
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((void)InterlockedExchangeAdd((volatile LONG*)value, amount))
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#define xe_atomic_sub_32(amount, value) \
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((void)InterlockedExchangeSubtract((volatile unsigned*)value, amount))
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#define xe_atomic_cas_32(oldValue, newValue, value) \
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(InterlockedCompareExchange((volatile LONG*)value, newValue, oldValue) == oldValue)
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typedef SLIST_HEADER xe_atomic_stack_t;
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#define xe_atomic_stack_init(stack) \
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InitializeSListHead((PSLIST_HEADER)stack)
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#define xe_atomic_stack_enqueue(stack, item, offset) \
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XEIGNORE(InterlockedPushEntrySList((PSLIST_HEADER)stack, (PSLIST_ENTRY)((byte*)item + offset)))
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XEFORCEINLINE void* xe_atomic_stack_dequeue(xe_atomic_stack_t* stack,
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const size_t offset) {
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void* ptr = (void*)InterlockedPopEntrySList((PSLIST_HEADER)stack);
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if (ptr) {
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return (void*)(((uint8_t*)ptr) - offset);
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} else {
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return NULL;
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}
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}
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#elif XE_LIKE(POSIX)
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#define xe_atomic_inc_32(value) \
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__sync_add_and_fetch(value, 1)
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#define xe_atomic_dec_32(value) \
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__sync_sub_and_fetch(value, 1)
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#define xe_atomic_add_32(amount, value) \
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__sync_fetch_and_add(value, amount)
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#define xe_atomic_sub_32(amount, value) \
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__sync_fetch_and_sub(value, amount)
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#define xe_atomic_cas_32(oldValue, newValue, value) \
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__sync_bool_compare_and_swap(value, oldValue, newValue)
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#else
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#error No atomic primitives defined for this platform/cpu combination.
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#endif // OSX
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#endif // XENIA_ATOMIC_H_
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