vbox的更動 2565 路徑 trunk/src/VBox/VMM/VMMAll/PDMAllCritSect.cpp

時間撮記:

2007-5-9 下午04:28:03 (18 年 以前)

作者:

vboxsync

訊息:

A little experiment trying to get rid of the critsect contention in DevATA.

檔案:

• trunk/src/VBox/VMM/VMMAll/PDMAllCritSect.cpp (修改) (2 筆差異)

trunk/src/VBox/VMM/VMMAll/PDMAllCritSect.cpp

@@ -34 +34 @@
 #include <iprt/asm.h>
 #include <iprt/assert.h>
+#ifdef IN_RING3
+# include <iprt/semaphore.h>
+#endif 
 
 
@@ -107 +110 @@
         STAM_PROFILE_ADV_STOP(&pCritSect->s.StatLocked, l);
 # endif
-    int rc = RTCritSectLeave(&pCritSect->s.Core);
-    AssertRC(rc);
+    RTSEMEVENT EventToSignal = pCritSect->s.EventToSignal;
+    if (RT_LIKELY(EventToSignal == NIL_RTSEMEVENT))
+    {
+        int rc = RTCritSectLeave(&pCritSect->s.Core);
+        AssertRC(rc);
+    }
+    else
+    {
+        pCritSect->s.EventToSignal = NIL_RTSEMEVENT;
+        int rc = RTCritSectLeave(&pCritSect->s.Core);
+        AssertRC(rc);
+        LogBird(("signalling %#x\n", EventToSignal));
+        rc = RTSemEventSignal(EventToSignal);
+        AssertRC(rc);
+    }
 
-#else
+#else /* !IN_RING3 */
     Assert(VALID_PTR(pCritSect));
     Assert(pCritSect->s.Core.u32Magic == RTCRITSECT_MAGIC);