vbox的更動 21540 路徑 trunk/src/VBox/Runtime/r3/generic

時間撮記:

2009-7-13 下午02:51:23 (15 年 以前)

作者:

vboxsync

訊息:

IPRT: RTSemSpinMutex implementation.

檔案:

• trunk/src/VBox/Runtime/r3/generic/semspinmutex-r3-generic.cpp (複製) (複製 從 trunk/src/VBox/Runtime/generic/semfastmutex-generic.cpp ) (5 筆差異)

trunk/src/VBox/Runtime/r3/generic/semspinmutex-r3-generic.cpp

@@ -1 +1 @@
 /* $Id$ */
 /** @file
- * IPRT - Fast Mutex, Generic.
+ * IPRT - Spinning Mutex Semaphores, Ring-3, Generic.
  */
 
 /*
- * Copyright (C) 2006-2007 Sun Microsystems, Inc.
+ * Copyright (C) 2006-2009 Sun Microsystems, Inc.
  *
  * This file is part of VirtualBox Open Source Edition (OSE), as
@@ -38 +38 @@
 #include <iprt/alloc.h>
 #include <iprt/err.h>
+#include <iprt/assert.h>
 #include <iprt/critsect.h>
 
 
 
-RTDECL(int) RTSemFastMutexCreate(PRTSEMFASTMUTEX pMutexSem)
+RTDECL(int) RTSemSpinMutexCreate(PRTSEMSPINMUTEX phSpinMtx, uint32_t fFlags)
 {
+    AssertReturn(!(fFlags & ~RTSEMSPINMUTEX_FLAGS_VALID_MASK), VERR_INVALID_PARAMETER);
+    AssertPtr(phSpinMtx);
+
     PRTCRITSECT pCritSect = (PRTCRITSECT)RTMemAlloc(sizeof(RTCRITSECT));
     if (!pCritSect)
@@ -50 +54 @@
     if (RT_SUCCESS(rc))
     {
-        /** @todo pCritSect->fFlags |= RTCRITSECT_FLAGS_NO_NESTING; */
-        *pMutexSem = (RTSEMFASTMUTEX)pCritSect;
+        pCritSect->fFlags |= RTCRITSECT_FLAGS_NO_NESTING;
+        *phSpinMtx = (RTSEMSPINMUTEX)pCritSect;
     }
     else
@@ -57 +61 @@
     return rc;
 }
-RT_EXPORT_SYMBOL(RTSemFastMutexCreate);
+RT_EXPORT_SYMBOL(RTSemSpinMutexCreate);
 
 
-RTDECL(int) RTSemFastMutexDestroy(RTSEMFASTMUTEX MutexSem)
+RTDECL(int) RTSemSpinMutexDestroy(RTSEMSPINMUTEX hSpinMtx)
 {
-    if (MutexSem == NIL_RTSEMFASTMUTEX)
+    if (hSpinMtx == NIL_RTSEMSPINMUTEX)
         return VERR_INVALID_PARAMETER;
-    PRTCRITSECT pCritSect = (PRTCRITSECT)MutexSem;
+    PRTCRITSECT pCritSect = (PRTCRITSECT)hSpinMtx;
     int rc = RTCritSectDelete(pCritSect);
     if (RT_SUCCESS(rc))
@@ -70 +74 @@
     return rc;
 }
-RT_EXPORT_SYMBOL(RTSemFastMutexDestroy);
+RT_EXPORT_SYMBOL(RTSemSpinMutexDestroy);
 
 
-RTDECL(int) RTSemFastMutexRequest(RTSEMFASTMUTEX MutexSem)
+RTDECL(int) RTSemSpinMutexTryRequest(RTSEMSPINMUTEX hSpinMtx)
 {
-    return RTCritSectEnter((PRTCRITSECT)MutexSem);
+    return RTCritSectTryEnter((PRTCRITSECT)hSpinMtx);
+
 }
-RT_EXPORT_SYMBOL(RTSemFastMutexRequest);
+RT_EXPORT_SYMBOL(RTSemSpinMutexTryRequest);
 
 
-RTDECL(int) RTSemFastMutexRelease(RTSEMFASTMUTEX MutexSem)
+RTDECL(int) RTSemSpinMutexRequest(RTSEMSPINMUTEX hSpinMtx)
 {
-    return RTCritSectLeave((PRTCRITSECT)MutexSem);
+    return RTCritSectEnter((PRTCRITSECT)hSpinMtx);
 }
-RT_EXPORT_SYMBOL(RTSemFastMutexRelease);
+RT_EXPORT_SYMBOL(RTSemSpinMutexRequest);
 
+
+RTDECL(int) RTSemSpinMutexRelease(RTSEMSPINMUTEX hSpinMtx)
+{
+    return RTCritSectLeave((PRTCRITSECT)hSpinMtx);
+}
+RT_EXPORT_SYMBOL(RTSemSpinMutexRelease);
+