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Git conversion: Make reactos the root directory, move rosapps, rostests, wallpapers into modules, and delete rossubsys.
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Colin Finck
parent
b94e2d8ca0
commit
c2c66aff7d
24198 changed files with 0 additions and 37285 deletions
368
ntoskrnl/ex/mutant.c
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368
ntoskrnl/ex/mutant.c
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/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS Kernel
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* FILE: ntoskrnl/ex/mutant.c
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* PURPOSE: Executive Management of Mutants
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* PROGRAMMERS: Alex Ionescu (alex@relsoft.net)
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* Thomas Weidenmueller
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*/
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/* INCLUDES *****************************************************************/
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#include <ntoskrnl.h>
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#define NDEBUG
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#include <debug.h>
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#if defined (ALLOC_PRAGMA)
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#pragma alloc_text(INIT, ExpInitializeMutantImplementation)
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#endif
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/* DATA **********************************************************************/
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POBJECT_TYPE ExMutantObjectType = NULL;
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GENERIC_MAPPING ExpMutantMapping =
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{
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STANDARD_RIGHTS_READ | MUTANT_QUERY_STATE,
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STANDARD_RIGHTS_WRITE,
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STANDARD_RIGHTS_EXECUTE | SYNCHRONIZE,
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MUTANT_ALL_ACCESS
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};
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static const INFORMATION_CLASS_INFO ExMutantInfoClass[] =
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{
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/* MutantBasicInformation */
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ICI_SQ_SAME( sizeof(MUTANT_BASIC_INFORMATION), sizeof(ULONG), ICIF_QUERY),
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};
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/* FUNCTIONS *****************************************************************/
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VOID
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NTAPI
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ExpDeleteMutant(PVOID ObjectBody)
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{
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DPRINT("ExpDeleteMutant(ObjectBody 0x%p)\n", ObjectBody);
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/* Make sure to release the Mutant */
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KeReleaseMutant((PKMUTANT)ObjectBody,
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MUTANT_INCREMENT,
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TRUE,
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FALSE);
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}
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BOOLEAN
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INIT_FUNCTION
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NTAPI
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ExpInitializeMutantImplementation(VOID)
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{
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OBJECT_TYPE_INITIALIZER ObjectTypeInitializer;
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UNICODE_STRING Name;
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NTSTATUS Status;
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DPRINT("Creating Mutant Object Type\n");
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/* Create the Event Pair Object Type */
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RtlZeroMemory(&ObjectTypeInitializer, sizeof(ObjectTypeInitializer));
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RtlInitUnicodeString(&Name, L"Mutant");
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ObjectTypeInitializer.Length = sizeof(ObjectTypeInitializer);
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ObjectTypeInitializer.DefaultNonPagedPoolCharge = sizeof(KMUTANT);
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ObjectTypeInitializer.GenericMapping = ExpMutantMapping;
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ObjectTypeInitializer.PoolType = NonPagedPool;
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ObjectTypeInitializer.DeleteProcedure = ExpDeleteMutant;
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ObjectTypeInitializer.ValidAccessMask = MUTANT_ALL_ACCESS;
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ObjectTypeInitializer.InvalidAttributes = OBJ_OPENLINK;
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Status = ObCreateObjectType(&Name, &ObjectTypeInitializer, NULL, &ExMutantObjectType);
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if (!NT_SUCCESS(Status)) return FALSE;
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return TRUE;
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}
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/*
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* @implemented
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*/
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NTSTATUS
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NTAPI
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NtCreateMutant(OUT PHANDLE MutantHandle,
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IN ACCESS_MASK DesiredAccess,
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IN POBJECT_ATTRIBUTES ObjectAttributes OPTIONAL,
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IN BOOLEAN InitialOwner)
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{
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KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
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HANDLE hMutant;
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PKMUTANT Mutant;
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NTSTATUS Status;
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PAGED_CODE();
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DPRINT("NtCreateMutant(0x%p, 0x%x, 0x%p)\n",
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MutantHandle, DesiredAccess, ObjectAttributes);
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/* Check if we were called from user-mode */
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if (PreviousMode != KernelMode)
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{
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/* Enter SEH Block */
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_SEH2_TRY
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{
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/* Check handle pointer */
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ProbeForWriteHandle(MutantHandle);
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}
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_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
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{
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/* Return the exception code */
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_SEH2_YIELD(return _SEH2_GetExceptionCode());
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}
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_SEH2_END;
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}
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/* Create the Mutant Object*/
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Status = ObCreateObject(PreviousMode,
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ExMutantObjectType,
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ObjectAttributes,
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PreviousMode,
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NULL,
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sizeof(KMUTANT),
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0,
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0,
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(PVOID*)&Mutant);
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/* Check for success */
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if(NT_SUCCESS(Status))
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{
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/* Initialize the Kernel Mutant */
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DPRINT("Initializing the Mutant\n");
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KeInitializeMutant(Mutant, InitialOwner);
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/* Insert the Object */
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Status = ObInsertObject((PVOID)Mutant,
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NULL,
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DesiredAccess,
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0,
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NULL,
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&hMutant);
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/* Check for success */
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if (NT_SUCCESS(Status))
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{
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/* Enter SEH for return */
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_SEH2_TRY
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{
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/* Return the handle to the caller */
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*MutantHandle = hMutant;
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}
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_SEH2_EXCEPT(ExSystemExceptionFilter())
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{
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/* Get the exception code */
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Status = _SEH2_GetExceptionCode();
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}
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_SEH2_END;
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}
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}
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/* Return Status */
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return Status;
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}
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/*
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* @implemented
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*/
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NTSTATUS
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NTAPI
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NtOpenMutant(OUT PHANDLE MutantHandle,
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IN ACCESS_MASK DesiredAccess,
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IN POBJECT_ATTRIBUTES ObjectAttributes)
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{
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HANDLE hMutant;
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KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
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NTSTATUS Status;
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PAGED_CODE();
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DPRINT("NtOpenMutant(0x%p, 0x%x, 0x%p)\n",
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MutantHandle, DesiredAccess, ObjectAttributes);
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/* Check if we were called from user-mode */
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if (PreviousMode != KernelMode)
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{
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/* Enter SEH Block */
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_SEH2_TRY
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{
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/* Check handle pointer */
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ProbeForWriteHandle(MutantHandle);
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}
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_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
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{
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/* Return the exception code */
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_SEH2_YIELD(return _SEH2_GetExceptionCode());
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}
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_SEH2_END;
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}
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/* Open the Object */
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Status = ObOpenObjectByName(ObjectAttributes,
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ExMutantObjectType,
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PreviousMode,
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NULL,
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DesiredAccess,
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NULL,
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&hMutant);
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/* Check for success */
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if(NT_SUCCESS(Status))
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{
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/* Enter SEH for return */
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_SEH2_TRY
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{
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/* Return the handle to the caller */
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*MutantHandle = hMutant;
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}
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_SEH2_EXCEPT(ExSystemExceptionFilter())
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{
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Status = _SEH2_GetExceptionCode();
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}
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_SEH2_END;
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}
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/* Return Status */
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return Status;
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}
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/*
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* @implemented
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*/
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NTSTATUS
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NTAPI
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NtQueryMutant(IN HANDLE MutantHandle,
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IN MUTANT_INFORMATION_CLASS MutantInformationClass,
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OUT PVOID MutantInformation,
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IN ULONG MutantInformationLength,
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OUT PULONG ResultLength OPTIONAL)
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{
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PKMUTANT Mutant;
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KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
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NTSTATUS Status;
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PMUTANT_BASIC_INFORMATION BasicInfo =
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(PMUTANT_BASIC_INFORMATION)MutantInformation;
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PAGED_CODE();
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/* Check buffers and parameters */
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Status = DefaultQueryInfoBufferCheck(MutantInformationClass,
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ExMutantInfoClass,
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sizeof(ExMutantInfoClass) /
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sizeof(ExMutantInfoClass[0]),
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MutantInformation,
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MutantInformationLength,
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ResultLength,
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NULL,
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PreviousMode);
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if(!NT_SUCCESS(Status))
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{
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DPRINT("NtQueryMutant() failed, Status: 0x%x\n", Status);
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return Status;
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}
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/* Open the Object */
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Status = ObReferenceObjectByHandle(MutantHandle,
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MUTANT_QUERY_STATE,
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ExMutantObjectType,
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PreviousMode,
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(PVOID*)&Mutant,
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NULL);
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/* Check for Status */
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if (NT_SUCCESS(Status))
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{
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/* Enter SEH Block for return */
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_SEH2_TRY
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{
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/* Fill out the Basic Information Requested */
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DPRINT("Returning Mutant Information\n");
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BasicInfo->CurrentCount = KeReadStateMutant(Mutant);
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BasicInfo->OwnedByCaller = (Mutant->OwnerThread ==
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KeGetCurrentThread());
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BasicInfo->AbandonedState = Mutant->Abandoned;
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/* Return the Result Length if requested */
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if (ResultLength) *ResultLength = sizeof(MUTANT_BASIC_INFORMATION);
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}
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_SEH2_EXCEPT(ExSystemExceptionFilter())
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{
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Status = _SEH2_GetExceptionCode();
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}
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_SEH2_END;
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/* Release the Object */
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ObDereferenceObject(Mutant);
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}
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/* Return Status */
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return Status;
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}
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/*
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* @implemented
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*/
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NTSTATUS
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NTAPI
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NtReleaseMutant(IN HANDLE MutantHandle,
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IN PLONG PreviousCount OPTIONAL)
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{
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PKMUTANT Mutant;
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KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
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NTSTATUS Status;
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PAGED_CODE();
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DPRINT("NtReleaseMutant(MutantHandle 0x%p PreviousCount 0x%p)\n",
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MutantHandle,
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PreviousCount);
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/* Check if we were called from user-mode */
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if ((PreviousCount) && (PreviousMode != KernelMode))
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{
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/* Entry SEH Block */
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_SEH2_TRY
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{
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/* Make sure the state pointer is valid */
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ProbeForWriteLong(PreviousCount);
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}
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_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
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{
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/* Return the exception code */
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_SEH2_YIELD(return _SEH2_GetExceptionCode());
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}
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_SEH2_END;
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}
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/* Open the Object */
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Status = ObReferenceObjectByHandle(MutantHandle,
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0, /* No access rights required */
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ExMutantObjectType,
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PreviousMode,
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(PVOID*)&Mutant,
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NULL);
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/* Check for Success and release if such */
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if (NT_SUCCESS(Status))
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{
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/*
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* Release the mutant. doing so might raise an exception which we're
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* required to catch!
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*/
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_SEH2_TRY
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{
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/* Release the mutant */
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LONG Prev = KeReleaseMutant(Mutant,
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MUTANT_INCREMENT,
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FALSE,
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FALSE);
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/* Return the previous count if requested */
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if (PreviousCount) *PreviousCount = Prev;
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}
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_SEH2_EXCEPT(ExSystemExceptionFilter())
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{
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/* Get the exception code */
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Status = _SEH2_GetExceptionCode();
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}
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_SEH2_END;
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/* Dereference it */
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ObDereferenceObject(Mutant);
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}
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/* Return Status */
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return Status;
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}
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/* EOF */
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