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- Fix some small formatting issues.

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svn path=/trunk/; revision=20432
This commit is contained in:
Alex Ionescu 2005-12-29 18:47:14 +00:00
parent c3366b8062
commit 0b7ed59da0
3 changed files with 186 additions and 152 deletions
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10
reactos/ntoskrnl/ex/event.c
View file

@ -153,11 +153,13 @@ NtCreateEvent(OUT PHANDLE EventHandle,
&hEvent); &hEvent);
ObDereferenceObject(Event); ObDereferenceObject(Event);
/* Check for success and return handle */ /* Check for success */
if(NT_SUCCESS(Status)) if(NT_SUCCESS(Status))
{ {
/* Enter SEH for return */
_SEH_TRY _SEH_TRY
{ {
/* Return the handle to the caller */
*EventHandle = hEvent; *EventHandle = hEvent;
} }
_SEH_EXCEPT(_SEH_ExSystemExceptionFilter) _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
@ -320,14 +322,16 @@ NtQueryEvent(IN HANDLE EventHandle,
PKEVENT Event; PKEVENT Event;
KPROCESSOR_MODE PreviousMode = ExGetPreviousMode(); KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
NTSTATUS Status = STATUS_SUCCESS; NTSTATUS Status = STATUS_SUCCESS;
PEVENT_BASIC_INFORMATION BasicInfo = (PEVENT_BASIC_INFORMATION)EventInformation; PEVENT_BASIC_INFORMATION BasicInfo =
(PEVENT_BASIC_INFORMATION)EventInformation;
PAGED_CODE(); PAGED_CODE();
DPRINT("NtQueryEvent(0x%p, 0x%x)\n", EventHandle, EventInformationClass); DPRINT("NtQueryEvent(0x%p, 0x%x)\n", EventHandle, EventInformationClass);
/* Check buffers and class validity */ /* Check buffers and class validity */
Status = DefaultQueryInfoBufferCheck(EventInformationClass, Status = DefaultQueryInfoBufferCheck(EventInformationClass,
ExEventInfoClass, ExEventInfoClass,
sizeof(ExEventInfoClass) / sizeof(ExEventInfoClass[0]), sizeof(ExEventInfoClass) /
sizeof(ExEventInfoClass[0]),
EventInformation, EventInformation,
EventInformationLength, EventInformationLength,
ReturnLength, ReturnLength,

239
reactos/ntoskrnl/ex/mutant.c
View file

@ -1,12 +1,10 @@
/* /*
* COPYRIGHT: See COPYING in the top level directory * COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel * PROJECT: ReactOS Kernel
* FILE: ntoskrnl/ex/mutant.c * FILE: ntoskrnl/ex/mutant.c
* PURPOSE: Executive Management of Mutants * PURPOSE: Executive Management of Mutants
* * PROGRAMMERS: Alex Ionescu (alex@relsoft.net)
* PROGRAMMERS: Alex Ionescu - Fix tab/space mismatching, tiny fixes to query function and * Thomas Weidenmueller
* add more debug output.
* David Welch (welch@cwcom.net)
*/ */
/* INCLUDES *****************************************************************/ /* INCLUDES *****************************************************************/
@ -19,31 +17,30 @@
#pragma alloc_text(INIT, ExpInitializeMutantImplementation) #pragma alloc_text(INIT, ExpInitializeMutantImplementation)
#endif #endif
#ifndef MUTANT_INCREMENT /* DATA **********************************************************************/
#define MUTANT_INCREMENT 1
#endif
POBJECT_TYPE ExMutantObjectType = NULL; POBJECT_TYPE ExMutantObjectType = NULL;
static GENERIC_MAPPING ExpMutantMapping = { GENERIC_MAPPING ExpMutantMapping =
{
STANDARD_RIGHTS_READ | SYNCHRONIZE | MUTANT_QUERY_STATE, STANDARD_RIGHTS_READ | SYNCHRONIZE | MUTANT_QUERY_STATE,
STANDARD_RIGHTS_WRITE | SYNCHRONIZE, STANDARD_RIGHTS_WRITE | SYNCHRONIZE,
STANDARD_RIGHTS_EXECUTE | SYNCHRONIZE | MUTANT_QUERY_STATE, STANDARD_RIGHTS_EXECUTE | SYNCHRONIZE | MUTANT_QUERY_STATE,
MUTANT_ALL_ACCESS}; MUTANT_ALL_ACCESS
};
static const INFORMATION_CLASS_INFO ExMutantInfoClass[] = {
static const INFORMATION_CLASS_INFO ExMutantInfoClass[] =
{
/* MutantBasicInformation */ /* MutantBasicInformation */
ICI_SQ_SAME( sizeof(MUTANT_BASIC_INFORMATION), sizeof(ULONG), ICIF_QUERY ), ICI_SQ_SAME( sizeof(MUTANT_BASIC_INFORMATION), sizeof(ULONG), ICIF_QUERY),
}; };
/* FUNCTIONS *****************************************************************/ /* FUNCTIONS *****************************************************************/
VOID VOID
STDCALL NTAPI
ExpDeleteMutant(PVOID ObjectBody) ExpDeleteMutant(PVOID ObjectBody)
{ {
DPRINT("ExpDeleteMutant(ObjectBody 0x%p)\n", ObjectBody); DPRINT("ExpDeleteMutant(ObjectBody 0x%p)\n", ObjectBody);
/* Make sure to release the Mutant */ /* Make sure to release the Mutant */
@ -55,12 +52,11 @@ ExpDeleteMutant(PVOID ObjectBody)
VOID VOID
INIT_FUNCTION INIT_FUNCTION
STDCALL NTAPI
ExpInitializeMutantImplementation(VOID) ExpInitializeMutantImplementation(VOID)
{ {
OBJECT_TYPE_INITIALIZER ObjectTypeInitializer; OBJECT_TYPE_INITIALIZER ObjectTypeInitializer;
UNICODE_STRING Name; UNICODE_STRING Name;
DPRINT("Creating Mutant Object Type\n"); DPRINT("Creating Mutant Object Type\n");
/* Create the Event Pair Object Type */ /* Create the Event Pair Object Type */
@ -79,7 +75,7 @@ ExpInitializeMutantImplementation(VOID)
* @implemented * @implemented
*/ */
NTSTATUS NTSTATUS
STDCALL NTAPI
NtCreateMutant(OUT PHANDLE MutantHandle, NtCreateMutant(OUT PHANDLE MutantHandle,
IN ACCESS_MASK DesiredAccess, IN ACCESS_MASK DesiredAccess,
IN POBJECT_ATTRIBUTES ObjectAttributes OPTIONAL, IN POBJECT_ATTRIBUTES ObjectAttributes OPTIONAL,
@ -89,22 +85,26 @@ NtCreateMutant(OUT PHANDLE MutantHandle,
HANDLE hMutant; HANDLE hMutant;
PKMUTANT Mutant; PKMUTANT Mutant;
NTSTATUS Status = STATUS_SUCCESS; NTSTATUS Status = STATUS_SUCCESS;
PAGED_CODE(); PAGED_CODE();
DPRINT("NtCreateMutant(0x%p, 0x%x, 0x%p)\n", MutantHandle, DesiredAccess, ObjectAttributes); DPRINT("NtCreateMutant(0x%p, 0x%x, 0x%p)\n",
MutantHandle, DesiredAccess, ObjectAttributes);
/* Check Output Safety */
if(PreviousMode != KernelMode) {
_SEH_TRY {
/* Check if we were called from user-mode */
if(PreviousMode != KernelMode)
{
/* Enter SEH Block */
_SEH_TRY
{
/* Check handle pointer */
ProbeForWriteHandle(MutantHandle); ProbeForWriteHandle(MutantHandle);
} _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) { }
_SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
{
Status = _SEH_GetExceptionCode(); Status = _SEH_GetExceptionCode();
}
_SEH_END;
} _SEH_END; /* Bail out if pointer was invalid */
if(!NT_SUCCESS(Status)) return Status; if(!NT_SUCCESS(Status)) return Status;
} }
@ -120,8 +120,8 @@ NtCreateMutant(OUT PHANDLE MutantHandle,
(PVOID*)&Mutant); (PVOID*)&Mutant);
/* Check for success */ /* Check for success */
if(NT_SUCCESS(Status)) { if(NT_SUCCESS(Status))
{
/* Initalize the Kernel Mutant */ /* Initalize the Kernel Mutant */
DPRINT("Initializing the Mutant\n"); DPRINT("Initializing the Mutant\n");
KeInitializeMutant(Mutant, InitialOwner); KeInitializeMutant(Mutant, InitialOwner);
@ -135,18 +135,20 @@ NtCreateMutant(OUT PHANDLE MutantHandle,
&hMutant); &hMutant);
ObDereferenceObject(Mutant); ObDereferenceObject(Mutant);
/* Check for success and return handle */ /* Check for success */
if(NT_SUCCESS(Status)) { if(NT_SUCCESS(Status))
{
_SEH_TRY { /* Enter SEH for return */
_SEH_TRY
{
/* Return the handle to the caller */
*MutantHandle = hMutant; *MutantHandle = hMutant;
}
} _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) { _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
{
Status = _SEH_GetExceptionCode(); Status = _SEH_GetExceptionCode();
}
} _SEH_END; _SEH_END;
} }
} }
@ -158,7 +160,7 @@ NtCreateMutant(OUT PHANDLE MutantHandle,
* @implemented * @implemented
*/ */
NTSTATUS NTSTATUS
STDCALL NTAPI
NtOpenMutant(OUT PHANDLE MutantHandle, NtOpenMutant(OUT PHANDLE MutantHandle,
IN ACCESS_MASK DesiredAccess, IN ACCESS_MASK DesiredAccess,
IN POBJECT_ATTRIBUTES ObjectAttributes) IN POBJECT_ATTRIBUTES ObjectAttributes)
@ -166,22 +168,26 @@ NtOpenMutant(OUT PHANDLE MutantHandle,
HANDLE hMutant; HANDLE hMutant;
KPROCESSOR_MODE PreviousMode = ExGetPreviousMode(); KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
NTSTATUS Status = STATUS_SUCCESS; NTSTATUS Status = STATUS_SUCCESS;
PAGED_CODE(); PAGED_CODE();
DPRINT("NtOpenMutant(0x%p, 0x%x, 0x%p)\n", MutantHandle, DesiredAccess, ObjectAttributes); DPRINT("NtOpenMutant(0x%p, 0x%x, 0x%p)\n",
MutantHandle, DesiredAccess, ObjectAttributes);
/* Check Output Safety */
if(PreviousMode != KernelMode) {
_SEH_TRY {
/* Check if we were called from user-mode */
if(PreviousMode != KernelMode)
{
/* Enter SEH Block */
_SEH_TRY
{
/* Check handle pointer */
ProbeForWriteHandle(MutantHandle); ProbeForWriteHandle(MutantHandle);
} _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) { }
_SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
{
Status = _SEH_GetExceptionCode(); Status = _SEH_GetExceptionCode();
}
_SEH_END;
} _SEH_END; /* Bail out if pointer was invalid */
if(!NT_SUCCESS(Status)) return Status; if(!NT_SUCCESS(Status)) return Status;
} }
@ -194,18 +200,20 @@ NtOpenMutant(OUT PHANDLE MutantHandle,
NULL, NULL,
&hMutant); &hMutant);
/* Check for success and return handle */ /* Check for success */
if(NT_SUCCESS(Status)) { if(NT_SUCCESS(Status))
{
_SEH_TRY { /* Enter SEH for return */
_SEH_TRY
{
/* Return the handle to the caller */
*MutantHandle = hMutant; *MutantHandle = hMutant;
}
} _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) { _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
{
Status = _SEH_GetExceptionCode(); Status = _SEH_GetExceptionCode();
}
} _SEH_END; _SEH_END;
} }
/* Return Status */ /* Return Status */
@ -216,7 +224,7 @@ NtOpenMutant(OUT PHANDLE MutantHandle,
* @implemented * @implemented
*/ */
NTSTATUS NTSTATUS
STDCALL NTAPI
NtQueryMutant(IN HANDLE MutantHandle, NtQueryMutant(IN HANDLE MutantHandle,
IN MUTANT_INFORMATION_CLASS MutantInformationClass, IN MUTANT_INFORMATION_CLASS MutantInformationClass,
OUT PVOID MutantInformation, OUT PVOID MutantInformation,
@ -226,20 +234,21 @@ NtQueryMutant(IN HANDLE MutantHandle,
PKMUTANT Mutant; PKMUTANT Mutant;
KPROCESSOR_MODE PreviousMode = ExGetPreviousMode(); KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
NTSTATUS Status = STATUS_SUCCESS; NTSTATUS Status = STATUS_SUCCESS;
PMUTANT_BASIC_INFORMATION BasicInfo = (PMUTANT_BASIC_INFORMATION)MutantInformation; PMUTANT_BASIC_INFORMATION BasicInfo =
(PMUTANT_BASIC_INFORMATION)MutantInformation;
PAGED_CODE(); PAGED_CODE();
/* Check buffers and parameters */ /* Check buffers and parameters */
Status = DefaultQueryInfoBufferCheck(MutantInformationClass, Status = DefaultQueryInfoBufferCheck(MutantInformationClass,
ExMutantInfoClass, ExMutantInfoClass,
sizeof(ExMutantInfoClass) / sizeof(ExMutantInfoClass[0]), sizeof(ExMutantInfoClass) /
sizeof(ExMutantInfoClass[0]),
MutantInformation, MutantInformation,
MutantInformationLength, MutantInformationLength,
ResultLength, ResultLength,
PreviousMode); PreviousMode);
if(!NT_SUCCESS(Status)) { if(!NT_SUCCESS(Status))
{
DPRINT("NtQueryMutant() failed, Status: 0x%x\n", Status); DPRINT("NtQueryMutant() failed, Status: 0x%x\n", Status);
return Status; return Status;
} }
@ -252,24 +261,26 @@ NtQueryMutant(IN HANDLE MutantHandle,
(PVOID*)&Mutant, (PVOID*)&Mutant,
NULL); NULL);
/* Check for Status */ /* Check for Status */
if(NT_SUCCESS(Status)) { if(NT_SUCCESS(Status))
{
_SEH_TRY { /* Enter SEH Block for return */
_SEH_TRY
{
/* Fill out the Basic Information Requested */ /* Fill out the Basic Information Requested */
DPRINT("Returning Mutant Information\n"); DPRINT("Returning Mutant Information\n");
BasicInfo->CurrentCount = KeReadStateMutant(Mutant); BasicInfo->CurrentCount = KeReadStateMutant(Mutant);
BasicInfo->OwnedByCaller = (Mutant->OwnerThread == KeGetCurrentThread()); BasicInfo->OwnedByCaller = (Mutant->OwnerThread ==
KeGetCurrentThread());
BasicInfo->AbandonedState = Mutant->Abandoned; BasicInfo->AbandonedState = Mutant->Abandoned;
/* Return the Result Length if requested */ /* Return the Result Length if requested */
if(ResultLength) *ResultLength = sizeof(MUTANT_BASIC_INFORMATION); if(ResultLength) *ResultLength = sizeof(MUTANT_BASIC_INFORMATION);
}
} _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) { _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
{
Status = _SEH_GetExceptionCode(); Status = _SEH_GetExceptionCode();
}
} _SEH_END; _SEH_END;
/* Release the Object */ /* Release the Object */
ObDereferenceObject(Mutant); ObDereferenceObject(Mutant);
@ -279,39 +290,38 @@ NtQueryMutant(IN HANDLE MutantHandle,
return Status; return Status;
} }
/* /*
* @implemented * @implemented
*/ */
NTSTATUS NTSTATUS
STDCALL NTAPI
NtReleaseMutant(IN HANDLE MutantHandle, NtReleaseMutant(IN HANDLE MutantHandle,
IN PLONG PreviousCount OPTIONAL) IN PLONG PreviousCount OPTIONAL)
{ {
PKMUTANT Mutant; PKMUTANT Mutant;
KPROCESSOR_MODE PreviousMode; KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
NTSTATUS Status = STATUS_SUCCESS; NTSTATUS Status = STATUS_SUCCESS;
PAGED_CODE(); PAGED_CODE();
PreviousMode = ExGetPreviousMode();
DPRINT("NtReleaseMutant(MutantHandle 0x%p PreviousCount 0x%p)\n", DPRINT("NtReleaseMutant(MutantHandle 0x%p PreviousCount 0x%p)\n",
MutantHandle, MutantHandle,
PreviousCount); PreviousCount);
/* Check Output Safety */ /* Check if we were called from user-mode */
if(PreviousMode != KernelMode && PreviousCount) { if((PreviousCount) && (PreviousMode != KernelMode))
{
_SEH_TRY { /* Entry SEH Block */
_SEH_TRY
{
/* Make sure the state pointer is valid */
ProbeForWriteLong(PreviousCount); ProbeForWriteLong(PreviousCount);
} _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) { }
_SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
{
Status = _SEH_GetExceptionCode(); Status = _SEH_GetExceptionCode();
}
_SEH_END;
} _SEH_END; /* Bail out if pointer was invalid */
if(!NT_SUCCESS(Status)) return Status; if(!NT_SUCCESS(Status)) return Status;
} }
@ -324,25 +334,30 @@ NtReleaseMutant(IN HANDLE MutantHandle,
NULL); NULL);
/* Check for Success and release if such */ /* Check for Success and release if such */
if(NT_SUCCESS(Status)) { if(NT_SUCCESS(Status))
{
/* release the mutant. doing so might raise an exception which we're /*
required to catch! */ * Release the mutant. doing so might raise an exception which we're
_SEH_TRY { * required to catch!
*/
LONG Prev = KeReleaseMutant(Mutant, MUTANT_INCREMENT, FALSE, FALSE); _SEH_TRY
{
if(PreviousCount) { /* Release the mutant */
LONG Prev = KeReleaseMutant(Mutant,
*PreviousCount = Prev; MUTANT_INCREMENT,
} FALSE,
FALSE);
} _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) {
/* Return the previous count if requested */
if(PreviousCount) *PreviousCount = Prev;
}
_SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
{
Status = _SEH_GetExceptionCode(); Status = _SEH_GetExceptionCode();
}
_SEH_END;
} _SEH_END; /* Dereference it */
ObDereferenceObject(Mutant); ObDereferenceObject(Mutant);
} }

83
reactos/ntoskrnl/ex/sem.c
View file

@ -1,11 +1,10 @@
/* /*
* COPYRIGHT: See COPYING in the top level directory * COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel * PROJECT: ReactOS Kernel
* FILE: ntoskrnl/ex/sem.c * FILE: ntoskrnl/ex/sem.c
* PURPOSE: Semaphore Implementation * PURPOSE: Semaphore Implementation
*
* PROGRAMMERS: Alex Ionescu (alex@relsoft.net) * PROGRAMMERS: Alex Ionescu (alex@relsoft.net)
* David Welch (welch@mcmail.com) * Thomas Weidenmueller
*/ */
/* INCLUDES *****************************************************************/ /* INCLUDES *****************************************************************/
@ -22,7 +21,7 @@
POBJECT_TYPE ExSemaphoreObjectType; POBJECT_TYPE ExSemaphoreObjectType;
static GENERIC_MAPPING ExSemaphoreMapping = GENERIC_MAPPING ExSemaphoreMapping =
{ {
STANDARD_RIGHTS_READ | SEMAPHORE_QUERY_STATE, STANDARD_RIGHTS_READ | SEMAPHORE_QUERY_STATE,
STANDARD_RIGHTS_WRITE | SEMAPHORE_MODIFY_STATE, STANDARD_RIGHTS_WRITE | SEMAPHORE_MODIFY_STATE,
@ -33,17 +32,18 @@ static GENERIC_MAPPING ExSemaphoreMapping =
static const INFORMATION_CLASS_INFO ExSemaphoreInfoClass[] = static const INFORMATION_CLASS_INFO ExSemaphoreInfoClass[] =
{ {
/* SemaphoreBasicInformation */ /* SemaphoreBasicInformation */
ICI_SQ_SAME( sizeof(SEMAPHORE_BASIC_INFORMATION), sizeof(ULONG), ICIF_QUERY ), ICI_SQ_SAME( sizeof(SEMAPHORE_BASIC_INFORMATION), sizeof(ULONG), ICIF_QUERY),
}; };
/* FUNCTIONS *****************************************************************/
VOID VOID
INIT_FUNCTION INIT_FUNCTION
STDCALL NTAPI
ExpInitializeSemaphoreImplementation(VOID) ExpInitializeSemaphoreImplementation(VOID)
{ {
OBJECT_TYPE_INITIALIZER ObjectTypeInitializer; OBJECT_TYPE_INITIALIZER ObjectTypeInitializer;
UNICODE_STRING Name; UNICODE_STRING Name;
DPRINT("Creating Semaphore Object Type\n"); DPRINT("Creating Semaphore Object Type\n");
/* Create the Event Pair Object Type */ /* Create the Event Pair Object Type */
@ -62,10 +62,10 @@ ExpInitializeSemaphoreImplementation(VOID)
* @implemented * @implemented
*/ */
NTSTATUS NTSTATUS
STDCALL NTAPI
NtCreateSemaphore(OUT PHANDLE SemaphoreHandle, NtCreateSemaphore(OUT PHANDLE SemaphoreHandle,
IN ACCESS_MASK DesiredAccess, IN ACCESS_MASK DesiredAccess,
IN POBJECT_ATTRIBUTES ObjectAttributes OPTIONAL, IN POBJECT_ATTRIBUTES ObjectAttributes OPTIONAL,
IN LONG InitialCount, IN LONG InitialCount,
IN LONG MaximumCount) IN LONG MaximumCount)
{ {
@ -75,11 +75,13 @@ NtCreateSemaphore(OUT PHANDLE SemaphoreHandle,
NTSTATUS Status = STATUS_SUCCESS; NTSTATUS Status = STATUS_SUCCESS;
PAGED_CODE(); PAGED_CODE();
/* Check Output Safety */ /* Check if we were called from user-mode */
if(PreviousMode != KernelMode) if(PreviousMode != KernelMode)
{ {
/* Enter SEH Block */
_SEH_TRY _SEH_TRY
{ {
/* Check handle pointer */
ProbeForWriteHandle(SemaphoreHandle); ProbeForWriteHandle(SemaphoreHandle);
} }
_SEH_EXCEPT(_SEH_ExSystemExceptionFilter) _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
@ -88,11 +90,14 @@ NtCreateSemaphore(OUT PHANDLE SemaphoreHandle,
} }
_SEH_END; _SEH_END;
/* Bail out if pointer was invalid */
if(!NT_SUCCESS(Status)) return Status; if(!NT_SUCCESS(Status)) return Status;
} }
/* Make sure the counts make sense */ /* Make sure the counts make sense */
if (MaximumCount <= 0 || InitialCount < 0 || InitialCount > MaximumCount) if ((MaximumCount <= 0) ||
(InitialCount < 0) ||
(InitialCount > MaximumCount))
{ {
DPRINT("Invalid Count Data!\n"); DPRINT("Invalid Count Data!\n");
return STATUS_INVALID_PARAMETER; return STATUS_INVALID_PARAMETER;
@ -126,11 +131,13 @@ NtCreateSemaphore(OUT PHANDLE SemaphoreHandle,
&hSemaphore); &hSemaphore);
ObDereferenceObject(Semaphore); ObDereferenceObject(Semaphore);
/* Check for success and return handle */ /* Check for success */
if(NT_SUCCESS(Status)) if(NT_SUCCESS(Status))
{ {
/* Enter SEH Block for return */
_SEH_TRY _SEH_TRY
{ {
/* Return the handle */
*SemaphoreHandle = hSemaphore; *SemaphoreHandle = hSemaphore;
} }
_SEH_EXCEPT(_SEH_ExSystemExceptionFilter) _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
@ -149,7 +156,7 @@ NtCreateSemaphore(OUT PHANDLE SemaphoreHandle,
* @implemented * @implemented
*/ */
NTSTATUS NTSTATUS
STDCALL NTAPI
NtOpenSemaphore(OUT PHANDLE SemaphoreHandle, NtOpenSemaphore(OUT PHANDLE SemaphoreHandle,
IN ACCESS_MASK DesiredAccess, IN ACCESS_MASK DesiredAccess,
IN POBJECT_ATTRIBUTES ObjectAttributes) IN POBJECT_ATTRIBUTES ObjectAttributes)
@ -159,11 +166,13 @@ NtOpenSemaphore(OUT PHANDLE SemaphoreHandle,
NTSTATUS Status = STATUS_SUCCESS; NTSTATUS Status = STATUS_SUCCESS;
PAGED_CODE(); PAGED_CODE();
/* Check Output Safety */ /* Check if we were called from user-mode */
if(PreviousMode != KernelMode) if(PreviousMode != KernelMode)
{ {
/* Enter SEH Block */
_SEH_TRY _SEH_TRY
{ {
/* Check handle pointer */
ProbeForWriteHandle(SemaphoreHandle); ProbeForWriteHandle(SemaphoreHandle);
} }
_SEH_EXCEPT(_SEH_ExSystemExceptionFilter) _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
@ -172,6 +181,7 @@ NtOpenSemaphore(OUT PHANDLE SemaphoreHandle,
} }
_SEH_END; _SEH_END;
/* Bail out if pointer was invalid */
if(!NT_SUCCESS(Status)) return Status; if(!NT_SUCCESS(Status)) return Status;
} }
@ -184,17 +194,20 @@ NtOpenSemaphore(OUT PHANDLE SemaphoreHandle,
NULL, NULL,
&hSemaphore); &hSemaphore);
/* Check for success and return handle */ /* Check for success */
if(NT_SUCCESS(Status)) if(NT_SUCCESS(Status))
{ {
/* Enter SEH Block for return */
_SEH_TRY _SEH_TRY
{ {
/* Return the handle */
*SemaphoreHandle = hSemaphore; *SemaphoreHandle = hSemaphore;
} }
_SEH_EXCEPT(_SEH_ExSystemExceptionFilter) _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
{ {
Status = _SEH_GetExceptionCode(); Status = _SEH_GetExceptionCode();
} _SEH_END; }
_SEH_END;
} }
/* Return Status */ /* Return Status */
@ -205,7 +218,7 @@ NtOpenSemaphore(OUT PHANDLE SemaphoreHandle,
* @implemented * @implemented
*/ */
NTSTATUS NTSTATUS
STDCALL NTAPI
NtQuerySemaphore(IN HANDLE SemaphoreHandle, NtQuerySemaphore(IN HANDLE SemaphoreHandle,
IN SEMAPHORE_INFORMATION_CLASS SemaphoreInformationClass, IN SEMAPHORE_INFORMATION_CLASS SemaphoreInformationClass,
OUT PVOID SemaphoreInformation, OUT PVOID SemaphoreInformation,
@ -215,13 +228,13 @@ NtQuerySemaphore(IN HANDLE SemaphoreHandle,
PKSEMAPHORE Semaphore; PKSEMAPHORE Semaphore;
KPROCESSOR_MODE PreviousMode = ExGetPreviousMode(); KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
NTSTATUS Status = STATUS_SUCCESS; NTSTATUS Status = STATUS_SUCCESS;
PAGED_CODE(); PAGED_CODE();
/* Check buffers and class validity */ /* Check buffers and class validity */
Status = DefaultQueryInfoBufferCheck(SemaphoreInformationClass, Status = DefaultQueryInfoBufferCheck(SemaphoreInformationClass,
ExSemaphoreInfoClass, ExSemaphoreInfoClass,
sizeof(ExSemaphoreInfoClass) / sizeof(ExSemaphoreInfoClass[0]), sizeof(ExSemaphoreInfoClass) /
sizeof(ExSemaphoreInfoClass[0]),
SemaphoreInformation, SemaphoreInformation,
SemaphoreInformationLength, SemaphoreInformationLength,
ReturnLength, ReturnLength,
@ -244,22 +257,24 @@ NtQuerySemaphore(IN HANDLE SemaphoreHandle,
/* Check for success */ /* Check for success */
if(NT_SUCCESS(Status)) if(NT_SUCCESS(Status))
{ {
/* Entry SEH Block */
_SEH_TRY _SEH_TRY
{ {
PSEMAPHORE_BASIC_INFORMATION BasicInfo = (PSEMAPHORE_BASIC_INFORMATION)SemaphoreInformation; PSEMAPHORE_BASIC_INFORMATION BasicInfo =
(PSEMAPHORE_BASIC_INFORMATION)SemaphoreInformation;
/* Return the basic information */ /* Return the basic information */
BasicInfo->CurrentCount = KeReadStateSemaphore(Semaphore); BasicInfo->CurrentCount = KeReadStateSemaphore(Semaphore);
BasicInfo->MaximumCount = Semaphore->Limit; BasicInfo->MaximumCount = Semaphore->Limit;
/* Return length */ /* Return the length */
if(ReturnLength) *ReturnLength = sizeof(SEMAPHORE_BASIC_INFORMATION); if(ReturnLength) *ReturnLength = sizeof(*BasicInfo);
} }
_SEH_EXCEPT(_SEH_ExSystemExceptionFilter) _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
{ {
Status = _SEH_GetExceptionCode(); Status = _SEH_GetExceptionCode();
} _SEH_END; }
_SEH_END;
/* Dereference the Object */ /* Dereference the Object */
ObDereferenceObject(Semaphore); ObDereferenceObject(Semaphore);
@ -273,22 +288,23 @@ NtQuerySemaphore(IN HANDLE SemaphoreHandle,
* @implemented * @implemented
*/ */
NTSTATUS NTSTATUS
STDCALL NTAPI
NtReleaseSemaphore(IN HANDLE SemaphoreHandle, NtReleaseSemaphore(IN HANDLE SemaphoreHandle,
IN LONG ReleaseCount, IN LONG ReleaseCount,
OUT PLONG PreviousCount OPTIONAL) OUT PLONG PreviousCount OPTIONAL)
{ {
KPROCESSOR_MODE PreviousMode = ExGetPreviousMode(); KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
PKSEMAPHORE Semaphore; PKSEMAPHORE Semaphore;
NTSTATUS Status = STATUS_SUCCESS; NTSTATUS Status = STATUS_SUCCESS;
PAGED_CODE(); PAGED_CODE();
/* Check buffer validity */ /* Check if we were called from user-mode */
if(PreviousCount && PreviousMode != KernelMode) if((PreviousCount) && (PreviousMode != KernelMode))
{ {
/* Entry SEH Block */
_SEH_TRY _SEH_TRY
{ {
/* Make sure the state pointer is valid */
ProbeForWriteLong(PreviousCount); ProbeForWriteLong(PreviousCount);
} }
_SEH_EXCEPT(_SEH_ExSystemExceptionFilter) _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
@ -297,6 +313,7 @@ NtReleaseSemaphore(IN HANDLE SemaphoreHandle,
} }
_SEH_END; _SEH_END;
/* Bail out if pointer was invalid */
if(!NT_SUCCESS(Status)) return Status; if(!NT_SUCCESS(Status)) return Status;
} }
@ -318,9 +335,10 @@ NtReleaseSemaphore(IN HANDLE SemaphoreHandle,
/* Check for success */ /* Check for success */
if (NT_SUCCESS(Status)) if (NT_SUCCESS(Status))
{ {
/* Release the semaphore */ /* Enter SEH Block */
_SEH_TRY _SEH_TRY
{ {
/* Release the semaphore */
LONG PrevCount = KeReleaseSemaphore(Semaphore, LONG PrevCount = KeReleaseSemaphore(Semaphore,
IO_NO_INCREMENT, IO_NO_INCREMENT,
ReleaseCount, ReleaseCount,
@ -328,10 +346,7 @@ NtReleaseSemaphore(IN HANDLE SemaphoreHandle,
ObDereferenceObject(Semaphore); ObDereferenceObject(Semaphore);
/* Return the old count if requested */ /* Return the old count if requested */
if(PreviousCount) if(PreviousCount) *PreviousCount = PrevCount;
{
*PreviousCount = PrevCount;
}
} }
_SEH_EXCEPT(_SEH_ExSystemExceptionFilter) _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
{ {