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-rw-r--r--src/common/spinlock.h108
1 files changed, 52 insertions, 56 deletions
diff --git a/src/common/spinlock.h b/src/common/spinlock.h
index 8d1624b33..3419bfdd5 100644
--- a/src/common/spinlock.h
+++ b/src/common/spinlock.h
@@ -14,7 +14,7 @@
// For more information, see LICENCE in the main folder
//
//
-
+
#ifdef WIN32
#include "../common/winapi.h"
#endif
@@ -25,81 +25,77 @@
#ifdef WIN32
-typedef struct __declspec(align(64)) SPIN_LOCK {
- volatile LONG lock;
- volatile LONG nest;
- volatile LONG sync_lock;
+typedef struct __declspec( align(64) ) SPIN_LOCK{
+ volatile LONG lock;
+ volatile LONG nest;
+ volatile LONG sync_lock;
} SPIN_LOCK, *PSPIN_LOCK;
#else
-typedef struct SPIN_LOCK {
- volatile int32 lock;
- volatile int32 nest; // nesting level.
-
- volatile int32 sync_lock;
+typedef struct SPIN_LOCK{
+ volatile int32 lock;
+ volatile int32 nest; // nesting level.
+
+ volatile int32 sync_lock;
} __attribute__((aligned(64))) SPIN_LOCK, *PSPIN_LOCK;
#endif
-static forceinline void InitializeSpinLock(PSPIN_LOCK lck)
-{
- lck->lock = 0;
- lck->nest = 0;
- lck->sync_lock = 0;
+static forceinline void InitializeSpinLock(PSPIN_LOCK lck){
+ lck->lock = 0;
+ lck->nest = 0;
+ lck->sync_lock = 0;
}
-static forceinline void FinalizeSpinLock(PSPIN_LOCK lck)
-{
- return;
+static forceinline void FinalizeSpinLock(PSPIN_LOCK lck){
+ return;
}
#define getsynclock(l) { while(1){ if(InterlockedCompareExchange(l, 1, 0) == 0) break; rathread_yield(); } }
#define dropsynclock(l) { InterlockedExchange(l, 0); }
-static forceinline void EnterSpinLock(PSPIN_LOCK lck)
-{
- int tid = rathread_get_tid();
-
- // 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) {
- InterlockedIncrement(&lck->nest);
- dropsynclock(&lck->sync_lock);
- return; // Got Lock
- }
- // drop sync lock
- dropsynclock(&lck->sync_lock);
-
-
- // Spin until we've got it !
- while (1) {
-
- if (InterlockedCompareExchange(&lck->lock, tid, 0) == 0) {
-
- InterlockedIncrement(&lck->nest);
- return; // Got Lock
- }
-
- rathread_yield(); // Force ctxswitch to another thread.
- }
+static forceinline void EnterSpinLock(PSPIN_LOCK lck){
+ int tid = rathread_get_tid();
+
+ // 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){
+ InterlockedIncrement(&lck->nest);
+ dropsynclock(&lck->sync_lock);
+ return; // Got Lock
+ }
+ // drop sync lock
+ dropsynclock(&lck->sync_lock);
+
+
+ // Spin until we've got it !
+ while(1){
+
+ if(InterlockedCompareExchange(&lck->lock, tid, 0) == 0){
+
+ InterlockedIncrement(&lck->nest);
+ return; // Got Lock
+ }
+
+ rathread_yield(); // Force ctxswitch to another thread.
+ }
}
-static forceinline void LeaveSpinLock(PSPIN_LOCK lck)
-{
- int tid = rathread_get_tid();
-
- getsynclock(&lck->sync_lock);
-
- if (InterlockedCompareExchange(&lck->lock, tid, tid) == tid) { // this thread owns the lock.
- if (InterlockedDecrement(&lck->nest) == 0)
- InterlockedExchange(&lck->lock, 0); // Unlock!
- }
+static forceinline void LeaveSpinLock(PSPIN_LOCK lck){
+ int tid = rathread_get_tid();
- dropsynclock(&lck->sync_lock);
+ getsynclock(&lck->sync_lock);
+
+ if(InterlockedCompareExchange(&lck->lock, tid, tid) == tid){ // this thread owns the lock.
+ if(InterlockedDecrement(&lck->nest) == 0)
+ InterlockedExchange(&lck->lock, 0); // Unlock!
+ }
+
+ dropsynclock(&lck->sync_lock);
}