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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 svn path=/trunk/; revision=12757
This commit is contained in:
Gunnar Dalsnes
parent
1de5b28f80
commit
a4b36e0224
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@ -4623,12 +4623,12 @@ InterlockedExchange(
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LONG Value
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);
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PVOID
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LONG
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STDCALL
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InterlockedCompareExchange(
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PVOID *Destination,
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PVOID Exchange,
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PVOID Comperand
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PLONG Destination,
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LONG Exchange,
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LONG Comperand
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);
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#endif
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@ -1,4 +1,4 @@
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/* $Id: rtl.h,v 1.53 2004/11/29 00:05:31 gdalsnes Exp $
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/* $Id$
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*
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*/
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@ -100,7 +100,7 @@ typedef struct _CRITICAL_SECTION_DEBUG
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ULONG EntryCount;
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ULONG ContentionCount;
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ULONG Depth;
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PVOID OwnerBackTrace[ 5 ];
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PVOID Spare[ 2 ];
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} CRITICAL_SECTION_DEBUG, *PCRITICAL_SECTION_DEBUG;
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@ -190,13 +190,13 @@ RtlAddAuditAccessAceEx(IN OUT PACL Acl,
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IN BOOLEAN Success,
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IN BOOLEAN Failure);
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VOID STDCALL
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NTSTATUS STDCALL
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RtlDeleteCriticalSection (PCRITICAL_SECTION CriticalSection);
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WCHAR STDCALL
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RtlDowncaseUnicodeChar(IN WCHAR Source);
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VOID STDCALL
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NTSTATUS STDCALL
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RtlEnterCriticalSection (PCRITICAL_SECTION CriticalSection);
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NTSTATUS STDCALL
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@ -211,7 +211,7 @@ RtlInt64ToUnicodeString (IN ULONGLONG Value,
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IN ULONG Base,
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PUNICODE_STRING String);
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VOID STDCALL
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NTSTATUS STDCALL
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RtlLeaveCriticalSection (PCRITICAL_SECTION CriticalSection);
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BOOLEAN STDCALL
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@ -744,12 +744,12 @@ InterlockedExchange (
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LONG Value
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);
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PVOID
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LONG
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STDCALL
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InterlockedCompareExchange (
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PVOID *Destination,
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PVOID Exchange,
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PVOID Comperand
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PLONG Destination,
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LONG Exchange,
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LONG Comperand
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);
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LONG
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@ -759,6 +759,26 @@ InterlockedExchangeAdd (
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LONG Increment
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);
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#ifndef InterlockedExchangePointer
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#ifdef _WIN64
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#define InterlockedExchangePointer(Target, Value) \
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(PVOID)InterlockedExchange64((PLONGLONG)(Target), (LONGLONG)(Value))
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#else
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#define InterlockedExchangePointer(Target, Value) \
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(PVOID)InterlockedExchange((PLONG)(Target), (LONG)(Value))
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#endif
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#endif
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#ifndef InterlockedCompareExchangePointer
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#ifdef _WIN64
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#define InterlockedCompareExchangePointer(Target, Exchange, Comperand) \
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(PVOID)InterlockedCompareExchange64((PLONGLONG)(Target), (LONGLONG)(Exchange), (LONGLONG)(Comperand))
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#else
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#define InterlockedCompareExchangePointer(Target, Exchange, Comperand) \
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(PVOID)InterlockedCompareExchange((PLONG)Target, (LONG)Exchange, (LONG)Comperand)
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#endif
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#endif
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#endif /* __INTERLOCKED_DECLARED */
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#endif /* __NTDRIVER__ */
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@ -1,4 +1,4 @@
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/* $Id: critical.c,v 1.20 2004/03/24 23:43:52 gdalsnes Exp $
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/* $Id$
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*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS system libraries
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@ -19,160 +19,391 @@
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/* FUNCTIONS *****************************************************************/
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/*
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* @implemented
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*/
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VOID STDCALL
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RtlDeleteCriticalSection(PCRITICAL_SECTION CriticalSection)
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inline static HANDLE RtlGetCurrentThreadId()
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{
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NtClose(CriticalSection->LockSemaphore);
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CriticalSection->LockCount = -1;
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return (HANDLE)NtCurrentTeb()->Cid.UniqueThread;
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}
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/*
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* @implemented
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*/
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DWORD STDCALL
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RtlSetCriticalSectionSpinCount(
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LPCRITICAL_SECTION CriticalSection,
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DWORD SpinCount
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)
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inline static void small_pause(void)
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{
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#ifdef MP
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DWORD PrevSpinCount = CriticalSection->SpinCount;
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CriticalSection->SpinCount = SpinCount;
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return PrevSpinCount;
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#ifdef __i386__
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__asm__ __volatile__( "rep;nop" : : : "memory" );
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#else
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return 0;
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__asm__ __volatile__( "" : : : "memory" );
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#endif
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}
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/*
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* @implemented
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/***********************************************************************
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* get_semaphore
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*/
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VOID STDCALL
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RtlEnterCriticalSection(PCRITICAL_SECTION CriticalSection)
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static inline HANDLE get_semaphore( PCRITICAL_SECTION crit )
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{
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HANDLE Thread = (HANDLE)NtCurrentTeb()->Cid.UniqueThread;
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if (InterlockedIncrement(&CriticalSection->LockCount))
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{
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NTSTATUS Status;
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if (CriticalSection->OwningThread == Thread)
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{
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CriticalSection->RecursionCount++;
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return;
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}
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DPRINT("Entering wait for critical section\n");
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Status = NtWaitForSingleObject(CriticalSection->LockSemaphore,
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0, FALSE);
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("RtlEnterCriticalSection: Failed to wait (Status %x)\n",
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Status);
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}
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DPRINT("Left wait for critical section\n");
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}
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CriticalSection->OwningThread = Thread;
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CriticalSection->RecursionCount = 1;
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HANDLE ret = crit->LockSemaphore;
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if (!ret)
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{
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HANDLE sem;
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if (!NT_SUCCESS(NtCreateSemaphore( &sem, SEMAPHORE_ALL_ACCESS, NULL, 0, 1 ))) return 0;
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if (!(ret = (HANDLE)InterlockedCompareExchangePointer( (PVOID *)&crit->LockSemaphore,
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(PVOID)sem, 0 )))
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ret = sem;
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else
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NtClose(sem); /* somebody beat us to it */
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}
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return ret;
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}
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/*
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* @implemented
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/***********************************************************************
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* RtlInitializeCriticalSection (NTDLL.@)
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*
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* Initialises a new critical section.
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*
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* PARAMS
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* crit [O] Critical section to initialise
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*
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* RETURNS
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* STATUS_SUCCESS.
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*
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* SEE
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* RtlInitializeCriticalSectionAndSpinCount(), RtlDeleteCriticalSection(),
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* RtlEnterCriticalSection(), RtlLeaveCriticalSection(),
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* RtlTryEnterCriticalSection(), RtlSetCriticalSectionSpinCount()
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*/
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NTSTATUS STDCALL
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RtlInitializeCriticalSection(PCRITICAL_SECTION CriticalSection)
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NTSTATUS STDCALL RtlInitializeCriticalSection( PCRITICAL_SECTION crit )
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{
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return RtlInitializeCriticalSectionAndSpinCount (CriticalSection,
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0);
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return RtlInitializeCriticalSectionAndSpinCount( crit, 0 );
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}
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/*
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* @implemented
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/***********************************************************************
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* RtlInitializeCriticalSectionAndSpinCount (NTDLL.@)
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*
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* Initialises a new critical section with a given spin count.
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*
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* PARAMS
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* crit [O] Critical section to initialise
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* spincount [I] Spin count for crit
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*
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* RETURNS
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* STATUS_SUCCESS.
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*
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* NOTES
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* Available on NT4 SP3 or later.
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*
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* SEE
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* RtlInitializeCriticalSection(), RtlDeleteCriticalSection(),
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* RtlEnterCriticalSection(), RtlLeaveCriticalSection(),
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* RtlTryEnterCriticalSection(), RtlSetCriticalSectionSpinCount()
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*/
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VOID STDCALL
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RtlLeaveCriticalSection(PCRITICAL_SECTION CriticalSection)
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NTSTATUS STDCALL RtlInitializeCriticalSectionAndSpinCount( PCRITICAL_SECTION crit, ULONG spincount )
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{
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HANDLE Thread = (HANDLE)NtCurrentTeb()->Cid.UniqueThread;
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if (CriticalSection->OwningThread != Thread)
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{
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DPRINT1("Freeing critical section not owned\n");
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}
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CriticalSection->RecursionCount--;
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if (CriticalSection->RecursionCount > 0)
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{
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InterlockedDecrement(&CriticalSection->LockCount);
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return;
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}
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CriticalSection->OwningThread = 0;
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if (InterlockedDecrement(&CriticalSection->LockCount) >= 0)
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{
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NTSTATUS Status;
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Status = NtReleaseSemaphore(CriticalSection->LockSemaphore, 1, NULL);
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("Failed to release semaphore (Status %x)\n",
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Status);
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}
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}
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/* Does ROS need this, or is this special to Wine? And if ros need it, should
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it be enabled in the release build? -Gunnar */
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if (RtlGetProcessHeap()) crit->DebugInfo = NULL;
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else
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{
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crit->DebugInfo = RtlAllocateHeap(RtlGetProcessHeap(), 0, sizeof(CRITICAL_SECTION_DEBUG));
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if (crit->DebugInfo)
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{
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crit->DebugInfo->Type = 0;
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crit->DebugInfo->CreatorBackTraceIndex = 0;
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crit->DebugInfo->CriticalSection = crit;
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crit->DebugInfo->ProcessLocksList.Blink = &(crit->DebugInfo->ProcessLocksList);
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crit->DebugInfo->ProcessLocksList.Flink = &(crit->DebugInfo->ProcessLocksList);
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crit->DebugInfo->EntryCount = 0;
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crit->DebugInfo->ContentionCount = 0;
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crit->DebugInfo->Spare[0] = 0;
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crit->DebugInfo->Spare[1] = 0;
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}
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}
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crit->LockCount = -1;
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crit->RecursionCount = 0;
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crit->OwningThread = 0;
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crit->LockSemaphore = 0;
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crit->SpinCount = (NtCurrentPeb()->NumberOfProcessors > 1) ? spincount : 0;
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return STATUS_SUCCESS;
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}
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/*
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* @implemented
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/***********************************************************************
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* RtlSetCriticalSectionSpinCount (NTDLL.@)
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*
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* Sets the spin count of a critical section.
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*
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* PARAMS
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* crit [I/O] Critical section
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* spincount [I] Spin count for crit
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*
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* RETURNS
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* The previous spin count.
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*
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* NOTES
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* If the system is not SMP, spincount is ignored and set to 0.
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*
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* SEE
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* RtlInitializeCriticalSection(), RtlInitializeCriticalSectionAndSpinCount(),
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* RtlDeleteCriticalSection(), RtlEnterCriticalSection(),
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* RtlLeaveCriticalSection(), RtlTryEnterCriticalSection()
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*/
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BOOLEAN STDCALL
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RtlTryEnterCriticalSection(PCRITICAL_SECTION CriticalSection)
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ULONG STDCALL RtlSetCriticalSectionSpinCount( PCRITICAL_SECTION crit, ULONG spincount )
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{
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if (InterlockedCompareExchange((PVOID*)&CriticalSection->LockCount,
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(PVOID)0, (PVOID)-1 ) == (PVOID)-1)
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{
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CriticalSection->OwningThread =
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(HANDLE) NtCurrentTeb()->Cid.UniqueThread;
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CriticalSection->RecursionCount = 1;
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return TRUE;
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}
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if (CriticalSection->OwningThread ==
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(HANDLE)NtCurrentTeb()->Cid.UniqueThread)
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{
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InterlockedIncrement(&CriticalSection->LockCount);
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CriticalSection->RecursionCount++;
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return TRUE;
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}
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return FALSE;
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ULONG oldspincount = crit->SpinCount;
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crit->SpinCount = (NtCurrentPeb()->NumberOfProcessors > 1) ? spincount : 0;
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return oldspincount;
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}
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/*
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* @implemented
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/***********************************************************************
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* RtlDeleteCriticalSection (NTDLL.@)
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*
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* Frees the resources used by a critical section.
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*
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* PARAMS
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* crit [I/O] Critical section to free
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*
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* RETURNS
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* STATUS_SUCCESS.
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*
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* SEE
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* RtlInitializeCriticalSection(), RtlInitializeCriticalSectionAndSpinCount(),
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* RtlDeleteCriticalSection(), RtlEnterCriticalSection(),
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* RtlLeaveCriticalSection(), RtlTryEnterCriticalSection()
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*/
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NTSTATUS STDCALL
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RtlInitializeCriticalSectionAndSpinCount (PCRITICAL_SECTION CriticalSection,
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ULONG SpinCount)
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NTSTATUS STDCALL RtlDeleteCriticalSection( PCRITICAL_SECTION crit )
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{
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CriticalSection->LockCount = -1;
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CriticalSection->RecursionCount = 0;
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CriticalSection->OwningThread = (HANDLE)0;
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#ifdef MP
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CriticalSection->SpinCount = SpinCount;
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#else
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CriticalSection->SpinCount = 0;
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#endif
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return NtCreateSemaphore (&CriticalSection->LockSemaphore,
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SEMAPHORE_ALL_ACCESS,
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NULL,
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0,
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1);
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crit->LockCount = -1;
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crit->RecursionCount = 0;
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crit->OwningThread = (HANDLE)0;
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if (crit->LockSemaphore)
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NtClose( crit->LockSemaphore );
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crit->LockSemaphore = 0;
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if (crit->DebugInfo)
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{
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/* only free the ones we made in here */
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if (!crit->DebugInfo->Spare[1])
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{
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RtlFreeHeap( RtlGetProcessHeap(), 0, crit->DebugInfo );
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crit->DebugInfo = NULL;
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}
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}
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return STATUS_SUCCESS;
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}
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/***********************************************************************
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* RtlpWaitForCriticalSection (NTDLL.@)
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*
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* Waits for a busy critical section to become free.
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*
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* PARAMS
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* crit [I/O] Critical section to wait for
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*
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* RETURNS
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* STATUS_SUCCESS.
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*
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* NOTES
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* Use RtlEnterCriticalSection() instead of this function as it is often much
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* faster.
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*
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* SEE
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* RtlInitializeCriticalSection(), RtlInitializeCriticalSectionAndSpinCount(),
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* RtlDeleteCriticalSection(), RtlEnterCriticalSection(),
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* RtlLeaveCriticalSection(), RtlTryEnterCriticalSection()
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*/
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NTSTATUS STDCALL RtlpWaitForCriticalSection( PCRITICAL_SECTION crit )
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{
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for (;;)
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{
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EXCEPTION_RECORD rec;
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HANDLE sem = get_semaphore( crit );
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LARGE_INTEGER time;
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NTSTATUS status;
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time.QuadPart = -5000 * 10000; /* 5 seconds */
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status = NtWaitForSingleObject( sem, FALSE, &time );
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if ( status == STATUS_TIMEOUT )
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{
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const char *name = NULL;
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if (crit->DebugInfo) name = (char *)crit->DebugInfo->Spare[1];
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if (!name) name = "?";
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DPRINT1( "section %p %s wait timed out in thread %04lx, blocked by %04lx, retrying (60 sec)\n",
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crit, name, RtlGetCurrentThreadId(), (DWORD)crit->OwningThread );
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time.QuadPart = -60000 * 10000;
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status = NtWaitForSingleObject( sem, FALSE, &time );
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if ( status == STATUS_TIMEOUT /*&& TRACE_ON(relay)*/ )
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{
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DPRINT1( "section %p %s wait timed out in thread %04lx, blocked by %04lx, retrying (5 min)\n",
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crit, name, RtlGetCurrentThreadId(), (DWORD) crit->OwningThread );
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time.QuadPart = -300000 * (ULONGLONG)10000;
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status = NtWaitForSingleObject( sem, FALSE, &time );
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}
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}
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if (status == STATUS_WAIT_0) return STATUS_SUCCESS;
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/* Throw exception only for Wine internal locks */
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if ((!crit->DebugInfo) || (!crit->DebugInfo->Spare[1])) continue;
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rec.ExceptionCode = STATUS_POSSIBLE_DEADLOCK;
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rec.ExceptionFlags = 0;
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rec.ExceptionRecord = NULL;
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rec.ExceptionAddress = RtlRaiseException; /* sic */
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rec.NumberParameters = 1;
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rec.ExceptionInformation[0] = (DWORD)crit;
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RtlRaiseException( &rec );
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}
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}
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/***********************************************************************
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* RtlpUnWaitCriticalSection (NTDLL.@)
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*
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* Notifies other threads waiting on the busy critical section that it has
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* become free.
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*
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* PARAMS
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* crit [I/O] Critical section
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*
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* RETURNS
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* Success: STATUS_SUCCESS.
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* Failure: Any error returned by NtReleaseSemaphore()
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*
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* NOTES
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* Use RtlLeaveCriticalSection() instead of this function as it is often much
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* faster.
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*
|
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* SEE
|
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* RtlInitializeCriticalSection(), RtlInitializeCriticalSectionAndSpinCount(),
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* RtlDeleteCriticalSection(), RtlEnterCriticalSection(),
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* RtlLeaveCriticalSection(), RtlTryEnterCriticalSection()
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*/
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NTSTATUS STDCALL RtlpUnWaitCriticalSection( PCRITICAL_SECTION crit )
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{
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HANDLE sem = get_semaphore( crit );
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NTSTATUS res = NtReleaseSemaphore( sem, 1, NULL );
|
||||
if (!NT_SUCCESS(res)) RtlRaiseStatus( res );
|
||||
return res;
|
||||
}
|
||||
|
||||
|
||||
/***********************************************************************
|
||||
* 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 RtlEnterCriticalSection( PCRITICAL_SECTION crit )
|
||||
{
|
||||
if (crit->SpinCount)
|
||||
{
|
||||
ULONG count;
|
||||
|
||||
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 */
|
||||
|
|
|
|||
Loading…
Reference in a new issue