/*
* COPYRIGHT: See COPYING in the top level directory
- * PROJECT: ReactOS kernel
+ * PROJECT: ReactOS Kernel
* FILE: ntoskrnl/ex/mutant.c
* PURPOSE: Executive Management of Mutants
- *
- * PROGRAMMERS: Alex Ionescu - Fix tab/space mismatching, tiny fixes to query function and
- * add more debug output.
- * David Welch (welch@cwcom.net)
+ * PROGRAMMERS: Alex Ionescu (alex@relsoft.net)
+ * Thomas Weidenmueller
*/
/* INCLUDES *****************************************************************/
#pragma alloc_text(INIT, ExpInitializeMutantImplementation)
#endif
-#ifndef MUTANT_INCREMENT
-#define MUTANT_INCREMENT 1
-#endif
+/* DATA **********************************************************************/
POBJECT_TYPE ExMutantObjectType = NULL;
-static GENERIC_MAPPING ExpMutantMapping = {
+GENERIC_MAPPING ExpMutantMapping =
+{
STANDARD_RIGHTS_READ | SYNCHRONIZE | MUTANT_QUERY_STATE,
STANDARD_RIGHTS_WRITE | SYNCHRONIZE,
STANDARD_RIGHTS_EXECUTE | SYNCHRONIZE | MUTANT_QUERY_STATE,
- MUTANT_ALL_ACCESS};
-
-static const INFORMATION_CLASS_INFO ExMutantInfoClass[] = {
+ MUTANT_ALL_ACCESS
+};
+static const INFORMATION_CLASS_INFO ExMutantInfoClass[] =
+{
/* MutantBasicInformation */
- ICI_SQ_SAME( sizeof(MUTANT_BASIC_INFORMATION), sizeof(ULONG), ICIF_QUERY ),
+ ICI_SQ_SAME( sizeof(MUTANT_BASIC_INFORMATION), sizeof(ULONG), ICIF_QUERY),
};
/* FUNCTIONS *****************************************************************/
VOID
-STDCALL
+NTAPI
ExpDeleteMutant(PVOID ObjectBody)
{
-
DPRINT("ExpDeleteMutant(ObjectBody 0x%p)\n", ObjectBody);
/* Make sure to release the Mutant */
VOID
INIT_FUNCTION
-STDCALL
+NTAPI
ExpInitializeMutantImplementation(VOID)
{
OBJECT_TYPE_INITIALIZER ObjectTypeInitializer;
UNICODE_STRING Name;
-
DPRINT("Creating Mutant Object Type\n");
-
+
/* Create the Event Pair Object Type */
RtlZeroMemory(&ObjectTypeInitializer, sizeof(ObjectTypeInitializer));
RtlInitUnicodeString(&Name, L"Mutant");
* @implemented
*/
NTSTATUS
-STDCALL
+NTAPI
NtCreateMutant(OUT PHANDLE MutantHandle,
IN ACCESS_MASK DesiredAccess,
IN POBJECT_ATTRIBUTES ObjectAttributes OPTIONAL,
HANDLE hMutant;
PKMUTANT Mutant;
NTSTATUS Status = STATUS_SUCCESS;
-
PAGED_CODE();
- DPRINT("NtCreateMutant(0x%p, 0x%x, 0x%p)\n", MutantHandle, DesiredAccess, ObjectAttributes);
-
- /* Check Output Safety */
- if(PreviousMode != KernelMode) {
-
- _SEH_TRY {
-
+ DPRINT("NtCreateMutant(0x%p, 0x%x, 0x%p)\n",
+ MutantHandle, DesiredAccess, ObjectAttributes);
+
+ /* Check if we were called from user-mode */
+ if(PreviousMode != KernelMode)
+ {
+ /* Enter SEH Block */
+ _SEH_TRY
+ {
+ /* Check handle pointer */
ProbeForWriteHandle(MutantHandle);
- } _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) {
-
+ }
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ {
Status = _SEH_GetExceptionCode();
+ }
+ _SEH_END;
- } _SEH_END;
-
+ /* Bail out if pointer was invalid */
if(!NT_SUCCESS(Status)) return Status;
}
(PVOID*)&Mutant);
/* Check for success */
- if(NT_SUCCESS(Status)) {
-
+ if(NT_SUCCESS(Status))
+ {
/* Initalize the Kernel Mutant */
DPRINT("Initializing the Mutant\n");
KeInitializeMutant(Mutant, InitialOwner);
&hMutant);
ObDereferenceObject(Mutant);
- /* Check for success and return handle */
- if(NT_SUCCESS(Status)) {
-
- _SEH_TRY {
-
+ /* Check for success */
+ if(NT_SUCCESS(Status))
+ {
+ /* Enter SEH for return */
+ _SEH_TRY
+ {
+ /* Return the handle to the caller */
*MutantHandle = hMutant;
-
- } _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) {
-
+ }
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ {
Status = _SEH_GetExceptionCode();
-
- } _SEH_END;
+ }
+ _SEH_END;
}
}
* @implemented
*/
NTSTATUS
-STDCALL
+NTAPI
NtOpenMutant(OUT PHANDLE MutantHandle,
IN ACCESS_MASK DesiredAccess,
IN POBJECT_ATTRIBUTES ObjectAttributes)
HANDLE hMutant;
KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
NTSTATUS Status = STATUS_SUCCESS;
-
PAGED_CODE();
- DPRINT("NtOpenMutant(0x%p, 0x%x, 0x%p)\n", MutantHandle, DesiredAccess, ObjectAttributes);
-
- /* Check Output Safety */
- if(PreviousMode != KernelMode) {
-
- _SEH_TRY {
-
+ DPRINT("NtOpenMutant(0x%p, 0x%x, 0x%p)\n",
+ MutantHandle, DesiredAccess, ObjectAttributes);
+
+ /* Check if we were called from user-mode */
+ if(PreviousMode != KernelMode)
+ {
+ /* Enter SEH Block */
+ _SEH_TRY
+ {
+ /* Check handle pointer */
ProbeForWriteHandle(MutantHandle);
- } _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) {
-
+ }
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ {
Status = _SEH_GetExceptionCode();
+ }
+ _SEH_END;
- } _SEH_END;
-
+ /* Bail out if pointer was invalid */
if(!NT_SUCCESS(Status)) return Status;
}
NULL,
&hMutant);
- /* Check for success and return handle */
- if(NT_SUCCESS(Status)) {
-
- _SEH_TRY {
-
+ /* Check for success */
+ if(NT_SUCCESS(Status))
+ {
+ /* Enter SEH for return */
+ _SEH_TRY
+ {
+ /* Return the handle to the caller */
*MutantHandle = hMutant;
-
- } _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) {
-
+ }
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ {
Status = _SEH_GetExceptionCode();
-
- } _SEH_END;
+ }
+ _SEH_END;
}
/* Return Status */
* @implemented
*/
NTSTATUS
-STDCALL
+NTAPI
NtQueryMutant(IN HANDLE MutantHandle,
IN MUTANT_INFORMATION_CLASS MutantInformationClass,
OUT PVOID MutantInformation,
PKMUTANT Mutant;
KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
NTSTATUS Status = STATUS_SUCCESS;
- PMUTANT_BASIC_INFORMATION BasicInfo = (PMUTANT_BASIC_INFORMATION)MutantInformation;
-
+ PMUTANT_BASIC_INFORMATION BasicInfo =
+ (PMUTANT_BASIC_INFORMATION)MutantInformation;
PAGED_CODE();
/* Check buffers and parameters */
Status = DefaultQueryInfoBufferCheck(MutantInformationClass,
ExMutantInfoClass,
- sizeof(ExMutantInfoClass) / sizeof(ExMutantInfoClass[0]),
+ sizeof(ExMutantInfoClass) /
+ sizeof(ExMutantInfoClass[0]),
MutantInformation,
MutantInformationLength,
ResultLength,
PreviousMode);
- if(!NT_SUCCESS(Status)) {
-
+ if(!NT_SUCCESS(Status))
+ {
DPRINT("NtQueryMutant() failed, Status: 0x%x\n", Status);
return Status;
}
(PVOID*)&Mutant,
NULL);
/* Check for Status */
- if(NT_SUCCESS(Status)) {
-
- _SEH_TRY {
-
+ if(NT_SUCCESS(Status))
+ {
+ /* Enter SEH Block for return */
+ _SEH_TRY
+ {
/* Fill out the Basic Information Requested */
DPRINT("Returning Mutant Information\n");
BasicInfo->CurrentCount = KeReadStateMutant(Mutant);
- BasicInfo->OwnedByCaller = (Mutant->OwnerThread == KeGetCurrentThread());
+ BasicInfo->OwnedByCaller = (Mutant->OwnerThread ==
+ KeGetCurrentThread());
BasicInfo->AbandonedState = Mutant->Abandoned;
/* Return the Result Length if requested */
if(ResultLength) *ResultLength = sizeof(MUTANT_BASIC_INFORMATION);
-
- } _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) {
-
+ }
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ {
Status = _SEH_GetExceptionCode();
-
- } _SEH_END;
+ }
+ _SEH_END;
/* Release the Object */
ObDereferenceObject(Mutant);
return Status;
}
-
/*
* @implemented
*/
NTSTATUS
-STDCALL
+NTAPI
NtReleaseMutant(IN HANDLE MutantHandle,
- IN PLONG PreviousCount OPTIONAL)
+ IN PLONG PreviousCount OPTIONAL)
{
PKMUTANT Mutant;
- KPROCESSOR_MODE PreviousMode;
+ KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
NTSTATUS Status = STATUS_SUCCESS;
-
PAGED_CODE();
-
- PreviousMode = ExGetPreviousMode();
-
DPRINT("NtReleaseMutant(MutantHandle 0x%p PreviousCount 0x%p)\n",
MutantHandle,
PreviousCount);
- /* Check Output Safety */
- if(PreviousMode != KernelMode && PreviousCount) {
-
- _SEH_TRY {
-
+ /* Check if we were called from user-mode */
+ if((PreviousCount) && (PreviousMode != KernelMode))
+ {
+ /* Entry SEH Block */
+ _SEH_TRY
+ {
+ /* Make sure the state pointer is valid */
ProbeForWriteLong(PreviousCount);
- } _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) {
-
+ }
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ {
Status = _SEH_GetExceptionCode();
+ }
+ _SEH_END;
- } _SEH_END;
-
+ /* Bail out if pointer was invalid */
if(!NT_SUCCESS(Status)) return Status;
}
NULL);
/* Check for Success and release if such */
- if(NT_SUCCESS(Status)) {
-
- /* release the mutant. doing so might raise an exception which we're
- required to catch! */
- _SEH_TRY {
-
- LONG Prev = KeReleaseMutant(Mutant, MUTANT_INCREMENT, FALSE, FALSE);
-
- if(PreviousCount) {
-
- *PreviousCount = Prev;
- }
-
- } _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) {
-
+ if(NT_SUCCESS(Status))
+ {
+ /*
+ * Release the mutant. doing so might raise an exception which we're
+ * required to catch!
+ */
+ _SEH_TRY
+ {
+ /* Release the mutant */
+ LONG Prev = KeReleaseMutant(Mutant,
+ MUTANT_INCREMENT,
+ FALSE,
+ FALSE);
+
+ /* Return the previous count if requested */
+ if(PreviousCount) *PreviousCount = Prev;
+ }
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ {
Status = _SEH_GetExceptionCode();
+ }
+ _SEH_END;
- } _SEH_END;
-
+ /* Dereference it */
ObDereferenceObject(Mutant);
}
projects / reactos.git / blobdiff