[ros-diffs] [gdalsnes] 12757: critical.c:

critical.c:
-don't allocate semaphore until its. actually needed (just like windows
& wine)
Ripped from Wine

-correct InterlockedCompareExchange proto
-add Interlocked(Compare)ExchangePointer def.
-correct CRITICAL_SECTION_DEBUG struct
Modified: trunk/reactos/include/funcs.h
Modified: trunk/reactos/include/ntdll/rtl.h
Modified: trunk/reactos/lib/ntdll/rtl/critical.c
  _____  

Modified: trunk/reactos/include/funcs.h
--- trunk/reactos/include/funcs.h	2005-01-03 14:47:11 UTC (rev
12756)
+++ trunk/reactos/include/funcs.h	2005-01-03 14:58:44 UTC (rev
12757)
@@ -4623,12 +4623,12 @@

 		    LONG Value
 		    );
 
-PVOID
+LONG
 STDCALL
 InterlockedCompareExchange(
-	    PVOID *Destination,
-	    PVOID Exchange,
-	    PVOID Comperand
+	    PLONG Destination,
+	    LONG Exchange,
+	    LONG Comperand
 	    );
 #endif
 
  _____  

Modified: trunk/reactos/include/ntdll/rtl.h
--- trunk/reactos/include/ntdll/rtl.h	2005-01-03 14:47:11 UTC (rev
12756)
+++ trunk/reactos/include/ntdll/rtl.h	2005-01-03 14:58:44 UTC (rev
12757)
@@ -1,4 +1,4 @@

-/* $Id: rtl.h,v 1.53 2004/11/29 00:05:31 gdalsnes Exp $
+/* $Id$
  *
  */
 
@@ -100,7 +100,7 @@
   ULONG EntryCount;
   ULONG ContentionCount;
   ULONG Depth;
-  PVOID OwnerBackTrace[ 5 ];
+  PVOID Spare[ 2 ];
 } CRITICAL_SECTION_DEBUG, *PCRITICAL_SECTION_DEBUG;
 
 
@@ -190,13 +190,13 @@
                        IN BOOLEAN Success,
                        IN BOOLEAN Failure);
 
-VOID STDCALL
+NTSTATUS STDCALL
 RtlDeleteCriticalSection (PCRITICAL_SECTION CriticalSection);
 
 WCHAR STDCALL
 RtlDowncaseUnicodeChar(IN WCHAR Source);
 
-VOID STDCALL
+NTSTATUS STDCALL
 RtlEnterCriticalSection (PCRITICAL_SECTION CriticalSection);
 
 NTSTATUS STDCALL
@@ -211,7 +211,7 @@
 			 IN ULONG Base,
 			 PUNICODE_STRING String);
 
-VOID STDCALL
+NTSTATUS STDCALL
 RtlLeaveCriticalSection (PCRITICAL_SECTION CriticalSection);
 
 BOOLEAN STDCALL
@@ -744,12 +744,12 @@
 	LONG Value
 	);
 
-PVOID
+LONG
 STDCALL
 InterlockedCompareExchange (
-	PVOID *Destination,
-	PVOID Exchange,
-	PVOID Comperand
+	PLONG Destination,
+	LONG Exchange,
+	LONG Comperand
 	);
 
 LONG
@@ -759,6 +759,26 @@
 	LONG Increment
 	);
 
+#ifndef InterlockedExchangePointer
+   #ifdef _WIN64
+      #define InterlockedExchangePointer(Target, Value) \
+             (PVOID)InterlockedExchange64((PLONGLONG)(Target),
(LONGLONG)(Value))
+   #else
+      #define InterlockedExchangePointer(Target, Value) \
+             (PVOID)InterlockedExchange((PLONG)(Target), (LONG)(Value))
+   #endif
+#endif
+
+#ifndef InterlockedCompareExchangePointer
+   #ifdef _WIN64
+      #define InterlockedCompareExchangePointer(Target, Exchange,
Comperand) \
+             (PVOID)InterlockedCompareExchange64((PLONGLONG)(Target),
(LONGLONG)(Exchange), (LONGLONG)(Comperand))
+   #else
+      #define InterlockedCompareExchangePointer(Target, Exchange,
Comperand) \
+             (PVOID)InterlockedCompareExchange((PLONG)Target,
(LONG)Exchange, (LONG)Comperand)
+   #endif
+#endif
+
 #endif /* __INTERLOCKED_DECLARED */
 
 #endif /* __NTDRIVER__ */
  _____  

Modified: trunk/reactos/lib/ntdll/rtl/critical.c
--- trunk/reactos/lib/ntdll/rtl/critical.c	2005-01-03 14:47:11 UTC
(rev 12756)
+++ trunk/reactos/lib/ntdll/rtl/critical.c	2005-01-03 14:58:44 UTC
(rev 12757)
@@ -1,4 +1,4 @@

-/* $Id: critical.c,v 1.20 2004/03/24 23:43:52 gdalsnes Exp $
+/* $Id$
  *
  * COPYRIGHT:       See COPYING in the top level directory
  * PROJECT:         ReactOS system libraries
@@ -19,160 +19,391 @@
 
 /* FUNCTIONS
*****************************************************************/
 
-/*
- * @implemented
- */
-VOID STDCALL
-RtlDeleteCriticalSection(PCRITICAL_SECTION CriticalSection)
+inline static HANDLE RtlGetCurrentThreadId()
 {
-   NtClose(CriticalSection->LockSemaphore);
-   CriticalSection->LockCount = -1;
+   return (HANDLE)NtCurrentTeb()->Cid.UniqueThread;
 }
 
-/*
- * @implemented
- */
-DWORD STDCALL
-RtlSetCriticalSectionSpinCount(
-   LPCRITICAL_SECTION CriticalSection,
-   DWORD SpinCount
-   )
+inline static void small_pause(void)
 {
-   
-#ifdef MP
-   DWORD PrevSpinCount = CriticalSection->SpinCount; 
-   CriticalSection->SpinCount = SpinCount;
-   return PrevSpinCount;
+#ifdef __i386__
+    __asm__ __volatile__( "rep;nop" : : : "memory" );
 #else
-   return 0;
+    __asm__ __volatile__( "" : : : "memory" );
 #endif
+}
 
+/**********************************************************************
*
+ *           get_semaphore
+ */
+static inline HANDLE get_semaphore( PCRITICAL_SECTION crit )
+{
+   HANDLE ret = crit->LockSemaphore;
+   if (!ret)
+   {
+      HANDLE sem;
+      if (!NT_SUCCESS(NtCreateSemaphore( &sem, SEMAPHORE_ALL_ACCESS,
NULL, 0, 1 ))) return 0;
+      if (!(ret = (HANDLE)InterlockedCompareExchangePointer( (PVOID
*)&crit->LockSemaphore,
+                                                  (PVOID)sem, 0 )))
+         ret = sem;
+      else
+         NtClose(sem);  /* somebody beat us to it */
+   }
+   return ret;
 }
 
+/**********************************************************************
*
+ *           RtlInitializeCriticalSection   (NTDLL.@)
+ *
+ * Initialises a new critical section.
+ *
+ * PARAMS
+ *  crit [O] Critical section to initialise
+ *
+ * RETURNS
+ *  STATUS_SUCCESS.
+ *
+ * SEE
+ *  RtlInitializeCriticalSectionAndSpinCount(),
RtlDeleteCriticalSection(),
+ *  RtlEnterCriticalSection(), RtlLeaveCriticalSection(),
+ *  RtlTryEnterCriticalSection(), RtlSetCriticalSectionSpinCount()
+ */
+NTSTATUS STDCALL RtlInitializeCriticalSection( PCRITICAL_SECTION crit )
+{
+   return RtlInitializeCriticalSectionAndSpinCount( crit, 0 );
+}
 
-/*
- * @implemented
+/**********************************************************************
*
+ *           RtlInitializeCriticalSectionAndSpinCount   (NTDLL.@)
+ *
+ * Initialises a new critical section with a given spin count.
+ *
+ * PARAMS
+ *   crit      [O] Critical section to initialise
+ *   spincount [I] Spin count for crit
+ * 
+ * RETURNS
+ *  STATUS_SUCCESS.
+ *
+ * NOTES
+ *  Available on NT4 SP3 or later.
+ *
+ * SEE
+ *  RtlInitializeCriticalSection(), RtlDeleteCriticalSection(),
+ *  RtlEnterCriticalSection(), RtlLeaveCriticalSection(),
+ *  RtlTryEnterCriticalSection(), RtlSetCriticalSectionSpinCount()
  */
-VOID STDCALL
-RtlEnterCriticalSection(PCRITICAL_SECTION CriticalSection)
+NTSTATUS STDCALL RtlInitializeCriticalSectionAndSpinCount(
PCRITICAL_SECTION crit, ULONG spincount )
 {
-   HANDLE Thread = (HANDLE)NtCurrentTeb()->Cid.UniqueThread;
- 
-   if (InterlockedIncrement(&CriticalSection->LockCount))
-     {
-	NTSTATUS Status;
-	
-	if (CriticalSection->OwningThread == Thread)
-	  {
-	     CriticalSection->RecursionCount++;
-	     return;
-	  }
-	
-	DPRINT("Entering wait for critical section\n");
-	Status = NtWaitForSingleObject(CriticalSection->LockSemaphore, 
-				       0, FALSE);
-	if (!NT_SUCCESS(Status))
-	  {
-	     DPRINT1("RtlEnterCriticalSection: Failed to wait (Status
%x)\n", 
-		     Status);
-	  }
-	DPRINT("Left wait for critical section\n");
-     }
-   CriticalSection->OwningThread = Thread;
-   CriticalSection->RecursionCount = 1;
+   /* Does ROS need this, or is this special to Wine? And if ros need
it, should
+   it be enabled in the release build? -Gunnar */
+   if (RtlGetProcessHeap()) crit->DebugInfo = NULL;
+   else
+   {
+      crit->DebugInfo = RtlAllocateHeap(RtlGetProcessHeap(), 0,
sizeof(CRITICAL_SECTION_DEBUG));
+      if (crit->DebugInfo)
+      {
+         crit->DebugInfo->Type = 0;
+         crit->DebugInfo->CreatorBackTraceIndex = 0;
+         crit->DebugInfo->CriticalSection = crit;
+         crit->DebugInfo->ProcessLocksList.Blink =
&(crit->DebugInfo->ProcessLocksList);
+         crit->DebugInfo->ProcessLocksList.Flink =
&(crit->DebugInfo->ProcessLocksList);
+         crit->DebugInfo->EntryCount = 0;
+         crit->DebugInfo->ContentionCount = 0;
+         crit->DebugInfo->Spare[0] = 0;
+         crit->DebugInfo->Spare[1] = 0;
+      }
+   }
+   crit->LockCount      = -1;
+   crit->RecursionCount = 0;
+   crit->OwningThread   = 0;
+   crit->LockSemaphore  = 0;
+   crit->SpinCount      = (NtCurrentPeb()->NumberOfProcessors > 1) ?
spincount : 0;
+   return STATUS_SUCCESS;
 }
 
+/**********************************************************************
*
+ *           RtlSetCriticalSectionSpinCount   (NTDLL.@)
+ *
+ * Sets the spin count of a critical section.
+ *
+ * PARAMS
+ *   crit      [I/O] Critical section
+ *   spincount [I] Spin count for crit
+ *
+ * RETURNS
+ *  The previous spin count.
+ *
+ * NOTES
+ *  If the system is not SMP, spincount is ignored and set to 0.
+ *
+ * SEE
+ *  RtlInitializeCriticalSection(),
RtlInitializeCriticalSectionAndSpinCount(),
+ *  RtlDeleteCriticalSection(), RtlEnterCriticalSection(),
+ *  RtlLeaveCriticalSection(), RtlTryEnterCriticalSection()
+ */
+ULONG STDCALL RtlSetCriticalSectionSpinCount( PCRITICAL_SECTION crit,
ULONG spincount )
+{
+   ULONG oldspincount = crit->SpinCount;
+   crit->SpinCount = (NtCurrentPeb()->NumberOfProcessors > 1) ?
spincount : 0;
+   return oldspincount;
+}
 
-/*
- * @implemented
+/**********************************************************************
*
+ *           RtlDeleteCriticalSection   (NTDLL.@)
+ *
+ * Frees the resources used by a critical section.
+ *
+ * PARAMS
+ *  crit [I/O] Critical section to free
+ *
+ * RETURNS
+ *  STATUS_SUCCESS.
+ *
+ * SEE
+ *  RtlInitializeCriticalSection(),
RtlInitializeCriticalSectionAndSpinCount(),
+ *  RtlDeleteCriticalSection(), RtlEnterCriticalSection(),
+ *  RtlLeaveCriticalSection(), RtlTryEnterCriticalSection()
  */
-NTSTATUS STDCALL
-RtlInitializeCriticalSection(PCRITICAL_SECTION CriticalSection)
+NTSTATUS STDCALL RtlDeleteCriticalSection( PCRITICAL_SECTION crit )
 {
-  return RtlInitializeCriticalSectionAndSpinCount (CriticalSection,
-						   0);
+   crit->LockCount      = -1;
+   crit->RecursionCount = 0;
+   crit->OwningThread   = (HANDLE)0;
+   if (crit->LockSemaphore) 
+      NtClose( crit->LockSemaphore );
+   crit->LockSemaphore  = 0;
+   if (crit->DebugInfo)
+   {
+      /* only free the ones we made in here */
+      if (!crit->DebugInfo->Spare[1])
+      {
+         RtlFreeHeap( RtlGetProcessHeap(), 0, crit->DebugInfo );
+         crit->DebugInfo = NULL;
+      }
+   }
+   return STATUS_SUCCESS;
 }
 
 
-/*
- * @implemented
+/**********************************************************************
*
+ *           RtlpWaitForCriticalSection   (NTDLL.@)
+ *
+ * Waits for a busy critical section to become free.
+ * 
+ * PARAMS
+ *  crit [I/O] Critical section to wait for
+ *
+ * RETURNS
+ *  STATUS_SUCCESS.
+ *
+ * NOTES
+ *  Use RtlEnterCriticalSection() instead of this function as it is
often much
+ *  faster.
+ *
+ * SEE
+ *  RtlInitializeCriticalSection(),
RtlInitializeCriticalSectionAndSpinCount(),
+ *  RtlDeleteCriticalSection(), RtlEnterCriticalSection(),
+ *  RtlLeaveCriticalSection(), RtlTryEnterCriticalSection()
  */
-VOID STDCALL
-RtlLeaveCriticalSection(PCRITICAL_SECTION CriticalSection)
+NTSTATUS STDCALL RtlpWaitForCriticalSection( PCRITICAL_SECTION crit )
 {
-   HANDLE Thread = (HANDLE)NtCurrentTeb()->Cid.UniqueThread;
-   
-   if (CriticalSection->OwningThread != Thread)
-     {
-	DPRINT1("Freeing critical section not owned\n");
-     }
-   
-   CriticalSection->RecursionCount--;
-   if (CriticalSection->RecursionCount > 0)
-     {
-	InterlockedDecrement(&CriticalSection->LockCount);
-	return;
-     }
-   CriticalSection->OwningThread = 0;
-   if (InterlockedDecrement(&CriticalSection->LockCount) >= 0)
-     {
-	NTSTATUS Status;
-	
-	Status = NtReleaseSemaphore(CriticalSection->LockSemaphore, 1,
NULL);
-	if (!NT_SUCCESS(Status))
-	  {
-	     DPRINT1("Failed to release semaphore (Status %x)\n",
-		     Status);
-	  }
-     }
+   for (;;)
+   {
+      EXCEPTION_RECORD rec;
+      HANDLE sem = get_semaphore( crit );
+      LARGE_INTEGER time;
+      NTSTATUS status;
+
+      time.QuadPart = -5000 * 10000;  /* 5 seconds */
+      status = NtWaitForSingleObject( sem, FALSE, &time );
+      if ( status == STATUS_TIMEOUT )
+      {
+         const char *name = NULL;
+         if (crit->DebugInfo) name = (char *)crit->DebugInfo->Spare[1];
+         if (!name) name = "?";
+         DPRINT1( "section %p %s wait timed out in thread %04lx,
blocked by %04lx, retrying (60 sec)\n",
+              crit, name, RtlGetCurrentThreadId(),
(DWORD)crit->OwningThread );
+         time.QuadPart = -60000 * 10000;
+         status = NtWaitForSingleObject( sem, FALSE, &time );
+         if ( status == STATUS_TIMEOUT /*&& TRACE_ON(relay)*/ )
+         {
+            DPRINT1( "section %p %s wait timed out in thread %04lx,
blocked by %04lx, retrying (5 min)\n",
+               crit, name, RtlGetCurrentThreadId(), (DWORD)
crit->OwningThread );
+            time.QuadPart = -300000 * (ULONGLONG)10000;
+            status = NtWaitForSingleObject( sem, FALSE, &time );
+         }
+      }
+      if (status == STATUS_WAIT_0) return STATUS_SUCCESS;
+
+      /* Throw exception only for Wine internal locks */
+      if ((!crit->DebugInfo) || (!crit->DebugInfo->Spare[1])) continue;
+
+      rec.ExceptionCode    = STATUS_POSSIBLE_DEADLOCK;
+      rec.ExceptionFlags   = 0;
+      rec.ExceptionRecord  = NULL;
+      rec.ExceptionAddress = RtlRaiseException;  /* sic */
+      rec.NumberParameters = 1;
+      rec.ExceptionInformation[0] = (DWORD)crit;
+      RtlRaiseException( &rec );
+   }
 }
 
-/*
- * @implemented
+
+/**********************************************************************
*
+ *           RtlpUnWaitCriticalSection   (NTDLL.@)
+ *
+ * Notifies other threads waiting on the busy critical section that it
has
+ * become free.
+ * 
+ * PARAMS
+ *  crit [I/O] Critical section
+ *
+ * RETURNS
+ *  Success: STATUS_SUCCESS.
+ *  Failure: Any error returned by NtReleaseSemaphore()
+ *
+ * NOTES
+ *  Use RtlLeaveCriticalSection() instead of this function as it is
often much
+ *  faster.
+ *
+ * SEE
+ *  RtlInitializeCriticalSection(),
RtlInitializeCriticalSectionAndSpinCount(),
+ *  RtlDeleteCriticalSection(), RtlEnterCriticalSection(),
+ *  RtlLeaveCriticalSection(), RtlTryEnterCriticalSection()
  */
-BOOLEAN STDCALL
-RtlTryEnterCriticalSection(PCRITICAL_SECTION CriticalSection)
+NTSTATUS STDCALL RtlpUnWaitCriticalSection( PCRITICAL_SECTION crit )
 {
-   if (InterlockedCompareExchange((PVOID*)&CriticalSection->LockCount,
-				  (PVOID)0, (PVOID)-1 ) == (PVOID)-1)
-     {
-	CriticalSection->OwningThread = 
-	  (HANDLE) NtCurrentTeb()->Cid.UniqueThread;
-	CriticalSection->RecursionCount = 1;
-	return TRUE;
-     }
-   if (CriticalSection->OwningThread == 
-       (HANDLE)NtCurrentTeb()->Cid.UniqueThread)
-     {
-        InterlockedIncrement(&CriticalSection->LockCount);
-	CriticalSection->RecursionCount++;
-	return TRUE;
-     }
-   return FALSE;
+   HANDLE sem = get_semaphore( crit );
+   NTSTATUS res = NtReleaseSemaphore( sem, 1, NULL );
+   if (!NT_SUCCESS(res)) RtlRaiseStatus( res );
+   return res;
 }
 
 
-/*
- * @implemented
+/**********************************************************************
*
+ *           RtlEnterCriticalSection   (NTDLL.@)
+ *
+ * Enters a critical section, waiting for it to become available if
necessary.
+ *
+ * PARAMS
+ *  crit [I/O] Critical section to enter
+ *
+ * RETURNS
+ *  STATUS_SUCCESS. The critical section is held by the caller.
+ *  
+ * SEE
+ *  RtlInitializeCriticalSection(),
RtlInitializeCriticalSectionAndSpinCount(),
+ *  RtlDeleteCriticalSection(), RtlSetCriticalSectionSpinCount(),
+ *  RtlLeaveCriticalSection(), RtlTryEnterCriticalSection()
  */
-NTSTATUS STDCALL
-RtlInitializeCriticalSectionAndSpinCount (PCRITICAL_SECTION
CriticalSection,
-					  ULONG SpinCount)
+NTSTATUS STDCALL RtlEnterCriticalSection( PCRITICAL_SECTION crit )
 {
-  CriticalSection->LockCount = -1;
-  CriticalSection->RecursionCount = 0;
-  CriticalSection->OwningThread = (HANDLE)0;
-#ifdef MP  
-  CriticalSection->SpinCount = SpinCount;
-#else
-  CriticalSection->SpinCount = 0;
-#endif
+   if (crit->SpinCount)
+   {
+      ULONG count;
 
-  return NtCreateSemaphore (&CriticalSection->LockSemaphore,
-			    SEMAPHORE_ALL_ACCESS,
-			    NULL,
-			    0,
-			    1);
+      if (RtlTryEnterCriticalSection( crit )) return STATUS_SUCCESS;
+      for (count = crit->SpinCount; count > 0; count--)
+      {
+         if (crit->LockCount > 0) break;  /* more than one waiter,
don't bother spinning */
+         if (crit->LockCount == -1)       /* try again */
+         {
+             if (InterlockedCompareExchange(&crit->LockCount, 0,-1 ) ==
-1) goto done;
+         }
+         small_pause();
+      }
+   }
+
+   if (InterlockedIncrement( &crit->LockCount ))
+   {
+      if (crit->OwningThread == (HANDLE)RtlGetCurrentThreadId())
+      {
+         crit->RecursionCount++;
+         return STATUS_SUCCESS;
+      }
+
+      /* Now wait for it */
+      RtlpWaitForCriticalSection( crit );
+   }
+done:
+   crit->OwningThread   = (HANDLE)RtlGetCurrentThreadId();
+   crit->RecursionCount = 1;
+   return STATUS_SUCCESS;
 }
 
+
+/**********************************************************************
*
+ *           RtlTryEnterCriticalSection   (NTDLL.@)
+ *
+ * Tries to enter a critical section without waiting.
+ *
+ * PARAMS
+ *  crit [I/O] Critical section to enter
+ *
+ * RETURNS
+ *  Success: TRUE. The critical section is held by the caller.
+ *  Failure: FALSE. The critical section is currently held by another
thread.
+ *
+ * SEE
+ *  RtlInitializeCriticalSection(),
RtlInitializeCriticalSectionAndSpinCount(),
+ *  RtlDeleteCriticalSection(), RtlEnterCriticalSection(),
+ *  RtlLeaveCriticalSection(), RtlSetCriticalSectionSpinCount()
+ */
+BOOLEAN STDCALL RtlTryEnterCriticalSection( PCRITICAL_SECTION crit )
+{
+   BOOL ret = FALSE;
+   if (InterlockedCompareExchange(&crit->LockCount, 0L, -1 ) == -1)
+   {
+      crit->OwningThread   = (HANDLE)RtlGetCurrentThreadId();
+      crit->RecursionCount = 1;
+      ret = TRUE;
+   }
+   else if (crit->OwningThread == (HANDLE)RtlGetCurrentThreadId())
+   {
+      InterlockedIncrement( &crit->LockCount );
+      crit->RecursionCount++;
+      ret = TRUE;
+   }
+   return ret;
+}
+
+
+/**********************************************************************
*
+ *           RtlLeaveCriticalSection   (NTDLL.@)
+ *
+ * Leaves a critical section.
+ *
+ * PARAMS
+ *  crit [I/O] Critical section to leave.
+ *
+ * RETURNS
+ *  STATUS_SUCCESS.
+ *
+ * SEE
+ *  RtlInitializeCriticalSection(),
RtlInitializeCriticalSectionAndSpinCount(),
+ *  RtlDeleteCriticalSection(), RtlEnterCriticalSection(),
+ *  RtlSetCriticalSectionSpinCount(), RtlTryEnterCriticalSection()
+ */
+NTSTATUS STDCALL RtlLeaveCriticalSection( PCRITICAL_SECTION crit )
+{
+   if (crit->OwningThread != RtlGetCurrentThreadId())
+   {
+      DPRINT1("Freeing critical section not owned\n");
+   }
+
+   if (--crit->RecursionCount) InterlockedDecrement( &crit->LockCount
);
+   else
+   {
+      crit->OwningThread = 0;
+      if (InterlockedDecrement( &crit->LockCount ) >= 0)
+      {
+         /* someone is waiting */
+         RtlpUnWaitCriticalSection( crit );
+      }
+   }
+   return STATUS_SUCCESS;
+}
+
+
 /* EOF */