diff options
Diffstat (limited to 'src/common/spinlock.h')
| -rw-r--r-- | src/common/spinlock.h | 37 |
1 files changed, 18 insertions, 19 deletions
diff --git a/src/common/spinlock.h b/src/common/spinlock.h index 3419bfdd5..bde36b8e5 100644 --- a/src/common/spinlock.h +++ b/src/common/spinlock.h @@ -1,11 +1,10 @@ -#pragma once -#ifndef _rA_SPINLOCK_H_ -#define _rA_SPINLOCK_H_ +#ifndef COMMON_SPINLOCK_H +#define COMMON_SPINLOCK_H // // CAS based Spinlock Implementation // -// CamelCase names are choosen to be consistent with microsofts winapi +// CamelCase names are chosen to be consistent with Microsoft's WinAPI // which implements CriticalSection by this naming... // // Author: Florian Wilkemeyer <fw@f-ws.de> @@ -15,50 +14,50 @@ // // +#include "../common/atomic.h" +#include "../common/cbasetypes.h" +#include "../common/thread.h" + #ifdef WIN32 #include "../common/winapi.h" #endif -#include "../common/cbasetypes.h" -#include "../common/atomic.h" -#include "../common/thread.h" - #ifdef WIN32 typedef struct __declspec( align(64) ) SPIN_LOCK{ volatile LONG lock; volatile LONG nest; volatile LONG sync_lock; -} SPIN_LOCK, *PSPIN_LOCK; +} SPIN_LOCK; #else typedef struct SPIN_LOCK{ volatile int32 lock; volatile int32 nest; // nesting level. volatile int32 sync_lock; -} __attribute__((aligned(64))) SPIN_LOCK, *PSPIN_LOCK; +} __attribute__((aligned(64))) SPIN_LOCK; #endif -static forceinline void InitializeSpinLock(PSPIN_LOCK lck){ +static forceinline void InitializeSpinLock(SPIN_LOCK *lck){ lck->lock = 0; lck->nest = 0; lck->sync_lock = 0; } -static forceinline void FinalizeSpinLock(PSPIN_LOCK lck){ +static forceinline void FinalizeSpinLock(SPIN_LOCK *lck){ return; } -#define getsynclock(l) { while(1){ if(InterlockedCompareExchange(l, 1, 0) == 0) break; rathread_yield(); } } -#define dropsynclock(l) { InterlockedExchange(l, 0); } +#define getsynclock(l) do { if(InterlockedCompareExchange((l), 1, 0) == 0) break; rathread_yield(); } while(/*always*/1) +#define dropsynclock(l) do { InterlockedExchange((l), 0); } while(0) -static forceinline void EnterSpinLock(PSPIN_LOCK lck){ +static forceinline void EnterSpinLock(SPIN_LOCK *lck){ int tid = rathread_get_tid(); - // Get Sync Lock && Check if the requester thread already owns the lock. + // Get Sync Lock && Check if the requester thread already owns the lock. // if it owns, increase nesting level getsynclock(&lck->sync_lock); if(InterlockedCompareExchange(&lck->lock, tid, tid) == tid){ @@ -70,7 +69,7 @@ static forceinline void EnterSpinLock(PSPIN_LOCK lck){ dropsynclock(&lck->sync_lock); - // Spin until we've got it ! + // Spin until we've got it ! while(1){ if(InterlockedCompareExchange(&lck->lock, tid, 0) == 0){ @@ -85,7 +84,7 @@ static forceinline void EnterSpinLock(PSPIN_LOCK lck){ } -static forceinline void LeaveSpinLock(PSPIN_LOCK lck){ +static forceinline void LeaveSpinLock(SPIN_LOCK *lck){ int tid = rathread_get_tid(); getsynclock(&lck->sync_lock); @@ -101,4 +100,4 @@ static forceinline void LeaveSpinLock(PSPIN_LOCK lck){ -#endif +#endif /* COMMON_SPINLOCK_H */ |