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// Copyright (c) rAthena Project (www.rathena.org) - Licensed under GNU GPL
// For more information, see LICENCE in the main folder
#ifndef _COMMON_ATOMIC_H_
#define _COMMON_ATOMIC_H_
// Atomic Operations
// (Interlocked CompareExchange, Add .. and so on ..)
//
// Implementation varies / depends on:
// - Architecture
// - Compiler
// - Operating System
//
// our Abstraction is fully API-Compatible to Microsoft's implementation @ NT5.0+
//
#include "../common/cbasetypes.h"
#if defined(_MSC_VER)
#include "../common/winapi.h"
// This checks if C/C++ Compiler Version is 18.00
#if _MSC_VER < 1800
#if !defined(_M_X64)
// When compiling for windows 32bit, the 8byte interlocked operations are not provided by Microsoft
// (because they need at least i586 so its not generic enough.. ... )
forceinline int64 InterlockedCompareExchange64(volatile int64 *dest, int64 exch, int64 _cmp){
_asm{
lea esi,_cmp;
lea edi,exch;
mov eax,[esi];
mov edx,4[esi];
mov ebx,[edi];
mov ecx,4[edi];
mov esi,dest;
lock CMPXCHG8B [esi];
}
}
forceinline volatile int64 InterlockedIncrement64(volatile int64 *addend){
__int64 old;
do{
old = *addend;
}while(InterlockedCompareExchange64(addend, (old+1), old) != old);
return (old + 1);
}
forceinline volatile int64 InterlockedDecrement64(volatile int64 *addend){
__int64 old;
do{
old = *addend;
}while(InterlockedCompareExchange64(addend, (old-1), old) != old);
return (old - 1);
}
forceinline volatile int64 InterlockedExchangeAdd64(volatile int64 *addend, int64 increment){
__int64 old;
do{
old = *addend;
}while(InterlockedCompareExchange64(addend, (old + increment), old) != old);
return old;
}
forceinline volatile int64 InterlockedExchange64(volatile int64 *target, int64 val){
__int64 old;
do{
old = *target;
}while(InterlockedCompareExchange64(target, val, old) != old);
return old;
}
#endif //endif 32bit windows
#endif //endif _msc_ver check
#elif defined(__GNUC__)
// The __sync functions are available on x86 or ARMv6+
#if !defined(__x86_64__) && !defined(__i386__) \
&& ( !defined(__ARM_ARCH_VERSION__) || __ARM_ARCH_VERSION__ < 6 )
#error Your Target Platfrom is not supported
#endif
static forceinline int64 InterlockedExchangeAdd64(volatile int64 *addend, int64 increment){
return __sync_fetch_and_add(addend, increment);
}//end: InterlockedExchangeAdd64()
static forceinline int32 InterlockedExchangeAdd(volatile int32 *addend, int32 increment){
return __sync_fetch_and_add(addend, increment);
}//end: InterlockedExchangeAdd()
static forceinline int64 InterlockedIncrement64(volatile int64 *addend){
return __sync_add_and_fetch(addend, 1);
}//end: InterlockedIncrement64()
static forceinline int32 InterlockedIncrement(volatile int32 *addend){
return __sync_add_and_fetch(addend, 1);
}//end: InterlockedIncrement()
static forceinline int64 InterlockedDecrement64(volatile int64 *addend){
return __sync_sub_and_fetch(addend, 1);
}//end: InterlockedDecrement64()
static forceinline int32 InterlockedDecrement(volatile int32 *addend){
return __sync_sub_and_fetch(addend, 1);
}//end: InterlockedDecrement()
static forceinline int64 InterlockedCompareExchange64(volatile int64 *dest, int64 exch, int64 cmp){
return __sync_val_compare_and_swap(dest, cmp, exch);
}//end: InterlockedCompareExchange64()
static forceinline int32 InterlockedCompareExchange(volatile int32 *dest, int32 exch, int32 cmp){
return __sync_val_compare_and_swap(dest, cmp, exch);
}//end: InterlockedCompareExchnage()
static forceinline int64 InterlockedExchange64(volatile int64 *target, int64 val){
return __sync_lock_test_and_set(target, val);
}//end: InterlockedExchange64()
static forceinline int32 InterlockedExchange(volatile int32 *target, int32 val){
return __sync_lock_test_and_set(target, val);
}//end: InterlockedExchange()
#endif //endif compiler decision
#endif /* _COMMON_ATOMIC_H_ */
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