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#ifndef TH_ATOMIC_INC
#define TH_ATOMIC_INC
#include "THGeneral.h"
/******************************************************************************
* Atomic operations for TH
* Five backends are integrated:
* - C11 atomic operations
* - MSVC intrinsics
* - GCC intrinsics
* - Pthread if none of the above is available
* - Unsafe mode in none of the above is available
******************************************************************************/
/******************************************************************************
* all-purpose functions
******************************************************************************/
/*
* *a = newvalue
*/
TH_API void THAtomicSet(int volatile *a, int newvalue);
/*
* return *a
*/
TH_API int THAtomicGet(int volatile *a);
/*
* *a += value,
* return previous *a
*/
TH_API int THAtomicAdd(int volatile *a, int value);
/*
* check if (*a == oldvalue)
* if true: set *a to newvalue, return 1
* if false: return 0
*/
TH_API int THAtomicCompareAndSwap(int volatile *a, int oldvalue, int newvalue);
/******************************************************************************
* refcounting functions
******************************************************************************/
/*
* *a++
*/
TH_API void THAtomicIncrementRef(int volatile *a);
/*
* *a--,
* return 1 if *a == 0 after the operation, 0 otherwise
*/
TH_API int THAtomicDecrementRef(int volatile *a);
/******************************************************************************
* functions for long type
******************************************************************************/
/*
* *a = newvalue
*/
TH_API void THAtomicSetLong(long volatile *a, long newvalue);
/*
* return *a
*/
TH_API long THAtomicGetLong(long volatile *a);
/*
* *a += value,
* return previous *a
*/
TH_API long THAtomicAddLong(long volatile *a, long value);
/*
* check if (*a == oldvalue)
* if true: set *a to newvalue, return 1
* if false: return 0
*/
TH_API long THAtomicCompareAndSwapLong(long volatile *a, long oldvalue, long newvalue);
/******************************************************************************
* functions for ptrdiff_t type
******************************************************************************/
/*
* *a = newvalue
*/
TH_API void THAtomicSetPtrdiff(ptrdiff_t volatile *a, ptrdiff_t newvalue);
/*
* return *a
*/
TH_API ptrdiff_t THAtomicGetPtrdiff(ptrdiff_t volatile *a);
/*
* *a += value,
* return previous *a
*/
TH_API ptrdiff_t THAtomicAddPtrdiff(ptrdiff_t volatile *a, ptrdiff_t value);
/*
* check if (*a == oldvalue)
* if true: set *a to newvalue, return 1
* if false: return 0
*/
TH_API ptrdiff_t THAtomicCompareAndSwapPtrdiff(ptrdiff_t volatile *a, ptrdiff_t oldvalue, ptrdiff_t newvalue);
#if defined(USE_C11_ATOMICS) && defined(ATOMIC_INT_LOCK_FREE) && \
ATOMIC_INT_LOCK_FREE == 2
#define TH_ATOMIC_IPC_REFCOUNT 1
#elif defined(USE_MSC_ATOMICS) || defined(USE_GCC_ATOMICS)
#define TH_ATOMIC_IPC_REFCOUNT 1
#endif
#endif
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