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127 lines
3.1 KiB
C
127 lines
3.1 KiB
C
/*
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* ReactOS kernel
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* Copyright (C) 1998, 1999, 2000, 2001 ReactOS Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* $Id: mutex.c,v 1.9 2001/11/04 00:17:24 ekohl Exp $
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*
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* PROJECT: ReactOS kernel
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* FILE: ntoskrnl/ke/mutex.c
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* PURPOSE: Implements mutex
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* PROGRAMMER: David Welch (welch@mcmail.com)
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* UPDATE HISTORY:
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* Created 22/05/98
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*/
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/* INCLUDES *****************************************************************/
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#include <ddk/ntddk.h>
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#include <internal/ke.h>
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#include <internal/id.h>
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#include <internal/debug.h>
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/* FUNCTIONS *****************************************************************/
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VOID STDCALL
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KeInitializeMutex(IN PKMUTEX Mutex,
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IN ULONG Level)
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{
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KeInitializeDispatcherHeader(&Mutex->Header,
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InternalMutexType,
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sizeof(KMUTEX) / sizeof(ULONG),
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1);
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Mutex->OwnerThread = NULL;
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Mutex->Abandoned = FALSE;
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Mutex->ApcDisable = 1;
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}
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LONG STDCALL
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KeReadStateMutex(IN PKMUTEX Mutex)
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{
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return(Mutex->Header.SignalState);
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}
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LONG STDCALL
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KeReleaseMutex(IN PKMUTEX Mutex,
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IN BOOLEAN Wait)
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{
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KeAcquireDispatcherDatabaseLock(Wait);
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Mutex->Header.SignalState++;
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assert(Mutex->Header.SignalState <= 1);
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if (Mutex->Header.SignalState == 1)
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{
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KeDispatcherObjectWake(&Mutex->Header);
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}
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KeReleaseDispatcherDatabaseLock(Wait);
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return(0);
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}
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NTSTATUS STDCALL
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KeWaitForMutexObject(PKMUTEX Mutex,
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KWAIT_REASON WaitReason,
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KPROCESSOR_MODE WaitMode,
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BOOLEAN Alertable,
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PLARGE_INTEGER Timeout)
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{
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return(KeWaitForSingleObject(Mutex,WaitReason,WaitMode,Alertable,Timeout));
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}
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VOID STDCALL
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KeInitializeMutant(IN PKMUTANT Mutant,
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IN BOOLEAN InitialOwner)
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{
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KeInitializeDispatcherHeader(&Mutant->Header,
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InternalMutexType,
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sizeof(KMUTANT) / sizeof(ULONG),
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1);
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if (InitialOwner == TRUE)
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{
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Mutant->OwnerThread = KeGetCurrentThread();
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}
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else
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{
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Mutant->OwnerThread = NULL;
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}
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Mutant->Abandoned = FALSE;
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Mutant->ApcDisable = 0;
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}
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LONG STDCALL
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KeReadStateMutant(IN PKMUTANT Mutant)
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{
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return(Mutant->Header.SignalState);
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}
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LONG STDCALL
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KeReleaseMutant(IN PKMUTANT Mutant,
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ULONG Param2,
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ULONG Param3,
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IN BOOLEAN Wait)
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{
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KeAcquireDispatcherDatabaseLock(Wait);
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Mutant->Header.SignalState++;
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assert(Mutant->Header.SignalState <= 1);
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if (Mutant->Header.SignalState == 1)
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{
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KeDispatcherObjectWake(&Mutant->Header);
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}
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KeReleaseDispatcherDatabaseLock(Wait);
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return(0);
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}
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/* EOF */
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