131 lines
4.5 KiB
C++
131 lines
4.5 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 2014 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 POLY_ATOMIC_H_
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#define POLY_ATOMIC_H_
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#include <cstdint>
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#include <poly/config.h>
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#include <poly/platform.h>
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#if XE_LIKE_OSX
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#include <libkern/OSAtomic.h>
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#endif // XE_LIKE_OSX
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namespace poly {
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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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inline int32_t atomic_inc(volatile int32_t* value) {
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return OSAtomicIncrement32Barrier(reinterpret_cast<volatile int32_t*>(value));
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}
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inline int32_t atomic_dec(volatile int32_t* value) {
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return OSAtomicDecrement32Barrier(reinterpret_cast<volatile int32_t*>(value));
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}
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inline int32_t atomic_exchange(int32_t new_value, volatile int32_t* value) {
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return OSAtomicCompareAndSwap32Barrier(*value, new_value, value);
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}
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inline int64_t atomic_exchange(int64_t new_value, volatile int64_t* value) {
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return OSAtomicCompareAndSwap64Barrier(*value, new_value, value);
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}
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inline int32_t atomic_cas(int32_t old_value, int32_t new_value,
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volatile int32_t* value) {
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return OSAtomicCompareAndSwap32Barrier(
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old_value, new_value, reinterpret_cast<volatile int32_t*>(value));
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}
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#elif XE_LIKE_WIN32
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inline int32_t atomic_inc(volatile int32_t* value) {
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return InterlockedIncrement(reinterpret_cast<volatile LONG*>(value));
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}
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inline int32_t atomic_dec(volatile int32_t* value) {
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return InterlockedDecrement(reinterpret_cast<volatile LONG*>(value));
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}
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inline int32_t atomic_exchange(int32_t new_value, volatile int32_t* value) {
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return InterlockedExchange(reinterpret_cast<volatile LONG*>(value),
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new_value);
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}
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inline int64_t atomic_exchange(int64_t new_value, volatile int64_t* value) {
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return InterlockedExchange64(reinterpret_cast<volatile LONGLONG*>(value),
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new_value);
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}
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inline int32_t atomic_cas(int32_t old_value, int32_t new_value,
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volatile int32_t* value) {
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return InterlockedCompareExchange(reinterpret_cast<volatile LONG*>(value),
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new_value, old_value) == old_value;
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}
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#elif XE_LIKE_POSIX
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inline int32_t atomic_inc(volatile int32_t* value) {
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return __sync_add_and_fetch(value, 1);
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}
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inline int32_t atomic_dec(volatile int32_t* value) {
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return __sync_sub_and_fetch(value, 1);
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}
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inline int32_t atomic_exchange(int32_t new_value, volatile int32_t* value) {
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return __sync_val_compare_and_swap(*value, value, new_value);
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}
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inline int64_t atomic_exchange(int64_t new_value, volatile int64_t* value) {
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return __sync_val_compare_and_swap(*value, value, new_value);
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}
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inline int32_t atomic_cas(int32_t old_value, int32_t new_value,
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volatile int32_t* value) {
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return __sync_bool_compare_and_swap(
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reinterpret_cast<volatile int32_t*>(value), old_value, new_value);
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}
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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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inline uint32_t atomic_inc(volatile uint32_t* value) {
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return static_cast<uint32_t>(
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atomic_inc(reinterpret_cast<volatile int32_t*>(value)));
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}
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inline uint32_t atomic_dec(volatile uint32_t* value) {
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return static_cast<uint32_t>(
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atomic_dec(reinterpret_cast<volatile int32_t*>(value)));
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}
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inline uint32_t atomic_exchange(uint32_t new_value, volatile uint32_t* value) {
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return static_cast<uint32_t>(
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atomic_exchange(static_cast<int32_t>(new_value),
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reinterpret_cast<volatile int32_t*>(value)));
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}
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inline uint64_t atomic_exchange(uint64_t new_value, volatile uint64_t* value) {
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return static_cast<uint64_t>(
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atomic_exchange(static_cast<int64_t>(new_value),
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reinterpret_cast<volatile int64_t*>(value)));
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}
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inline uint32_t atomic_cas(uint32_t old_value, uint32_t new_value,
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volatile uint32_t* value) {
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return static_cast<uint32_t>(atomic_cas(
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static_cast<int32_t>(old_value), static_cast<int32_t>(new_value),
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reinterpret_cast<volatile int32_t*>(value)));
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}
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} // namespace poly
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#endif // POLY_ATOMIC_H_
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