-/*
+/*
* COPYRIGHT: See COPYING in the top level directory
- * PROJECT: ReactOS kernel
- * FILE: ntoskrnl/nt/event.c
- * PURPOSE: Named event support
- *
- * PROGRAMMERS: Alex Ionescu(alex@relsoft.net) - Fixed bugs/commented
- * Philip Susi and David Welch
+ * PROJECT: ReactOS Kernel
+ * FILE: ntoskrnl/ex/event.c
+ * PURPOSE: Event support
+ * PROGRAMMERS: Alex Ionescu(alex@relsoft.net)
+ * Thomas Weidenmueller
*/
/* INCLUDES *****************************************************************/
#define NDEBUG
#include <internal/debug.h>
+#if defined (ALLOC_PRAGMA)
+#pragma alloc_text(INIT, ExpInitializeEventImplementation)
+#endif
+
/* GLOBALS *******************************************************************/
-POBJECT_TYPE EXPORTED ExEventObjectType = NULL;
+POBJECT_TYPE ExEventObjectType = NULL;
-static GENERIC_MAPPING ExpEventMapping = {
+GENERIC_MAPPING ExpEventMapping =
+{
STANDARD_RIGHTS_READ | SYNCHRONIZE | EVENT_QUERY_STATE,
STANDARD_RIGHTS_WRITE | SYNCHRONIZE | EVENT_MODIFY_STATE,
STANDARD_RIGHTS_EXECUTE | SYNCHRONIZE | EVENT_QUERY_STATE,
EVENT_ALL_ACCESS};
-static const INFORMATION_CLASS_INFO ExEventInfoClass[] = {
-
+static const INFORMATION_CLASS_INFO ExEventInfoClass[] =
+{
/* EventBasicInformation */
ICI_SQ_SAME( sizeof(EVENT_BASIC_INFORMATION), sizeof(ULONG), ICIF_QUERY),
};
/* FUNCTIONS *****************************************************************/
-VOID
+VOID
INIT_FUNCTION
+NTAPI
ExpInitializeEventImplementation(VOID)
{
+ OBJECT_TYPE_INITIALIZER ObjectTypeInitializer;
+ UNICODE_STRING Name;
+ DPRINT("Creating Event Object Type\n");
+
/* Create the Event Object Type */
- ExEventObjectType = ExAllocatePool(NonPagedPool,sizeof(OBJECT_TYPE));
- RtlInitUnicodeString(&ExEventObjectType->TypeName, L"Event");
- ExEventObjectType->Tag = TAG('E', 'V', 'T', 'T');
- ExEventObjectType->PeakObjects = 0;
- ExEventObjectType->PeakHandles = 0;
- ExEventObjectType->TotalObjects = 0;
- ExEventObjectType->TotalHandles = 0;
- ExEventObjectType->PagedPoolCharge = 0;
- ExEventObjectType->NonpagedPoolCharge = sizeof(KEVENT);
- ExEventObjectType->Mapping = &ExpEventMapping;
- ExEventObjectType->Dump = NULL;
- ExEventObjectType->Open = NULL;
- ExEventObjectType->Close = NULL;
- ExEventObjectType->Delete = NULL;
- ExEventObjectType->Parse = NULL;
- ExEventObjectType->Security = NULL;
- ExEventObjectType->QueryName = NULL;
- ExEventObjectType->OkayToClose = NULL;
- ExEventObjectType->Create = NULL;
- ExEventObjectType->DuplicationNotify = NULL;
- ObpCreateTypeObject(ExEventObjectType);
+ RtlZeroMemory(&ObjectTypeInitializer, sizeof(ObjectTypeInitializer));
+ RtlInitUnicodeString(&Name, L"Event");
+ ObjectTypeInitializer.Length = sizeof(ObjectTypeInitializer);
+ ObjectTypeInitializer.DefaultNonPagedPoolCharge = sizeof(KEVENT);
+ ObjectTypeInitializer.GenericMapping = ExpEventMapping;
+ ObjectTypeInitializer.PoolType = NonPagedPool;
+ ObjectTypeInitializer.ValidAccessMask = EVENT_ALL_ACCESS;
+ ObpCreateTypeObject(&ObjectTypeInitializer, &Name, &ExEventObjectType);
}
/*
* @implemented
*/
-NTSTATUS
-STDCALL
+NTSTATUS
+NTAPI
NtClearEvent(IN HANDLE EventHandle)
{
PKEVENT Event;
NTSTATUS Status;
-
PAGED_CODE();
-
+
/* Reference the Object */
Status = ObReferenceObjectByHandle(EventHandle,
EVENT_MODIFY_STATE,
ExGetPreviousMode(),
(PVOID*)&Event,
NULL);
-
+
/* Check for Success */
- if(NT_SUCCESS(Status)) {
-
+ if(NT_SUCCESS(Status))
+ {
/* Clear the Event and Dereference */
KeClearEvent(Event);
ObDereferenceObject(Event);
}
-
+
/* Return Status */
return Status;
}
-
/*
* @implemented
*/
-NTSTATUS
-STDCALL
+NTSTATUS
+NTAPI
NtCreateEvent(OUT PHANDLE EventHandle,
IN ACCESS_MASK DesiredAccess,
IN POBJECT_ATTRIBUTES ObjectAttributes OPTIONAL,
PKEVENT Event;
HANDLE hEvent;
NTSTATUS Status = STATUS_SUCCESS;
-
PAGED_CODE();
- DPRINT("NtCreateEvent(0x%x, 0x%x, 0x%x)\n", EventHandle, DesiredAccess, ObjectAttributes);
-
- /* Check Output Safety */
- if(PreviousMode != KernelMode) {
-
- _SEH_TRY {
-
- ProbeForWrite(EventHandle,
- sizeof(HANDLE),
- sizeof(ULONG));
- } _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) {
-
+ DPRINT("NtCreateEvent(0x%p, 0x%x, 0x%p)\n",
+ EventHandle, DesiredAccess, ObjectAttributes);
+
+ /* Check if we were called from user-mode */
+ if(PreviousMode != KernelMode)
+ {
+ /* Enter SEH Block */
+ _SEH_TRY
+ {
+ /* Check handle pointer */
+ ProbeForWriteHandle(EventHandle);
+ }
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ {
Status = _SEH_GetExceptionCode();
-
- } _SEH_END;
-
+ }
+ _SEH_END;
+
+ /* Bail out if pointer was invalid */
if(!NT_SUCCESS(Status)) return Status;
}
-
+
/* Create the Object */
Status = ObCreateObject(PreviousMode,
ExEventObjectType,
0,
0,
(PVOID*)&Event);
-
+
/* Check for Success */
- if(NT_SUCCESS(Status)) {
-
+ if(NT_SUCCESS(Status))
+ {
/* Initalize the Event */
KeInitializeEvent(Event,
EventType,
InitialState);
-
+
/* Insert it */
Status = ObInsertObject((PVOID)Event,
NULL,
NULL,
&hEvent);
ObDereferenceObject(Event);
-
+
/* Check for success and return handle */
- if(NT_SUCCESS(Status)) {
-
- _SEH_TRY {
-
+ if(NT_SUCCESS(Status))
+ {
+ _SEH_TRY
+ {
*EventHandle = hEvent;
-
- } _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) {
-
+ }
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ {
Status = _SEH_GetExceptionCode();
-
- } _SEH_END;
+ }
+ _SEH_END;
}
}
/*
* @implemented
*/
-NTSTATUS
-STDCALL
+NTSTATUS
+NTAPI
NtOpenEvent(OUT PHANDLE EventHandle,
IN ACCESS_MASK DesiredAccess,
IN POBJECT_ATTRIBUTES ObjectAttributes)
HANDLE hEvent;
KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
NTSTATUS Status = STATUS_SUCCESS;
-
- PAGED_CODE();
- DPRINT("NtOpenEvent(0x%x, 0x%x, 0x%x)\n", EventHandle, DesiredAccess, ObjectAttributes);
-
- /* Check Output Safety */
- if(PreviousMode != KernelMode) {
-
- _SEH_TRY {
-
- ProbeForWrite(EventHandle,
- sizeof(HANDLE),
- sizeof(ULONG));
- } _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) {
-
+ PAGED_CODE();
+ DPRINT("NtOpenEvent(0x%p, 0x%x, 0x%p)\n",
+ EventHandle, DesiredAccess, ObjectAttributes);
+
+ /* Check if we were called from user-mode */
+ if(PreviousMode != KernelMode)
+ {
+ /* Enter SEH Block */
+ _SEH_TRY
+ {
+ /* Check handle pointer */
+ ProbeForWriteHandle(EventHandle);
+ }
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ {
Status = _SEH_GetExceptionCode();
-
- } _SEH_END;
-
+ }
+ _SEH_END;
+
+ /* Bail out if pointer was invalid */
if(!NT_SUCCESS(Status)) return Status;
}
-
+
/* Open the Object */
Status = ObOpenObjectByName(ObjectAttributes,
ExEventObjectType,
DesiredAccess,
NULL,
&hEvent);
-
- /* 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 */
*EventHandle = hEvent;
-
- } _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) {
-
+ }
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ {
Status = _SEH_GetExceptionCode();
-
- } _SEH_END;
+ }
+ _SEH_END;
}
-
+
/* Return status */
return Status;
}
/*
* @implemented
*/
-NTSTATUS
-STDCALL
+NTSTATUS
+NTAPI
NtPulseEvent(IN HANDLE EventHandle,
OUT PLONG PreviousState OPTIONAL)
{
PKEVENT Event;
KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
NTSTATUS Status = STATUS_SUCCESS;
-
PAGED_CODE();
DPRINT("NtPulseEvent(EventHandle 0%x PreviousState 0%x)\n",
EventHandle, PreviousState);
- /* Check buffer validity */
- if(PreviousState && PreviousMode == UserMode) {
-
- _SEH_TRY {
-
- ProbeForWrite(PreviousState,
- sizeof(LONG),
- sizeof(ULONG));
- } _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) {
-
+ /* Check if we were called from user-mode */
+ if((PreviousState) && (PreviousMode != KernelMode))
+ {
+ /* Entry SEH Block */
+ _SEH_TRY
+ {
+ /* Make sure the state pointer is valid */
+ ProbeForWriteLong(PreviousState);
+ }
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ {
Status = _SEH_GetExceptionCode();
-
- } _SEH_END;
+ }
+ _SEH_END;
+ /* Bail out if pointer was invalid */
if(!NT_SUCCESS(Status)) return Status;
}
-
+
/* Open the Object */
Status = ObReferenceObjectByHandle(EventHandle,
EVENT_MODIFY_STATE,
PreviousMode,
(PVOID*)&Event,
NULL);
-
+
/* Check for success */
- if(NT_SUCCESS(Status)) {
-
+ if(NT_SUCCESS(Status))
+ {
/* Pulse the Event */
LONG Prev = KePulseEvent(Event, EVENT_INCREMENT, FALSE);
ObDereferenceObject(Event);
-
- /* Return it */
- if(PreviousState) {
-
- _SEH_TRY {
-
+
+ /* Check if caller wants the old state back */
+ if(PreviousState)
+ {
+ /* Entry SEH Block for return */
+ _SEH_TRY
+ {
+ /* Return previous state */
*PreviousState = Prev;
-
- } _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) {
-
+ }
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ {
Status = _SEH_GetExceptionCode();
-
- } _SEH_END;
+ }
+ _SEH_END;
}
}
return Status;
}
-
/*
* @implemented
*/
-NTSTATUS
-STDCALL
+NTSTATUS
+NTAPI
NtQueryEvent(IN HANDLE EventHandle,
IN EVENT_INFORMATION_CLASS EventInformationClass,
OUT PVOID EventInformation,
KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
NTSTATUS Status = STATUS_SUCCESS;
PEVENT_BASIC_INFORMATION BasicInfo = (PEVENT_BASIC_INFORMATION)EventInformation;
-
PAGED_CODE();
- DPRINT("NtQueryEvent(0x%x, 0x%x, 0x%x)\n", EventHandle, EventInformationClass);
-
+ DPRINT("NtQueryEvent(0x%p, 0x%x)\n", EventHandle, EventInformationClass);
+
/* Check buffers and class validity */
- DefaultQueryInfoBufferCheck(EventInformationClass,
- ExEventInfoClass,
- EventInformation,
- EventInformationLength,
- ReturnLength,
- PreviousMode,
- &Status);
- if(!NT_SUCCESS(Status)) {
-
+ Status = DefaultQueryInfoBufferCheck(EventInformationClass,
+ ExEventInfoClass,
+ sizeof(ExEventInfoClass) / sizeof(ExEventInfoClass[0]),
+ EventInformation,
+ EventInformationLength,
+ ReturnLength,
+ PreviousMode);
+ if(!NT_SUCCESS(Status))
+ {
/* Invalid buffers */
DPRINT("NtQuerySemaphore() failed, Status: 0x%x\n", Status);
return Status;
}
-
+
/* Get the Object */
Status = ObReferenceObjectByHandle(EventHandle,
EVENT_QUERY_STATE,
PreviousMode,
(PVOID*)&Event,
NULL);
-
- /* Check for success */
- if(NT_SUCCESS(Status)) {
- _SEH_TRY {
-
+ /* Check for success */
+ if(NT_SUCCESS(Status))
+ {
+ /* Entry SEH Block */
+ _SEH_TRY
+ {
/* Return Event Type and State */
BasicInfo->EventType = Event->Header.Type;
BasicInfo->EventState = KeReadStateEvent(Event);
/* Return length */
if(ReturnLength) *ReturnLength = sizeof(EVENT_BASIC_INFORMATION);
-
- } _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) {
-
+ }
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ {
Status = _SEH_GetExceptionCode();
-
- } _SEH_END;
+ }
+ _SEH_END;
/* Dereference the Object */
ObDereferenceObject(Event);
/*
* @implemented
*/
-NTSTATUS
-STDCALL
+NTSTATUS
+NTAPI
NtResetEvent(IN HANDLE EventHandle,
OUT PLONG PreviousState OPTIONAL)
{
PKEVENT Event;
KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
NTSTATUS Status = STATUS_SUCCESS;
-
PAGED_CODE();
DPRINT("NtResetEvent(EventHandle 0%x PreviousState 0%x)\n",
EventHandle, PreviousState);
- /* Check buffer validity */
- if(PreviousState && PreviousMode == UserMode) {
-
- _SEH_TRY {
-
- ProbeForWrite(PreviousState,
- sizeof(LONG),
- sizeof(ULONG));
- } _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) {
-
+ /* Check if we were called from user-mode */
+ if((PreviousState) && (PreviousMode != KernelMode))
+ {
+ /* Entry SEH Block */
+ _SEH_TRY
+ {
+ /* Make sure the state pointer is valid */
+ ProbeForWriteLong(PreviousState);
+ }
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ {
Status = _SEH_GetExceptionCode();
-
- } _SEH_END;
+ }
+ _SEH_END;
+ /* Bail out if pointer was invalid */
if(!NT_SUCCESS(Status)) return Status;
}
PreviousMode,
(PVOID*)&Event,
NULL);
-
+
/* Check for success */
- if(NT_SUCCESS(Status)) {
-
+ if(NT_SUCCESS(Status))
+ {
/* Reset the Event */
LONG Prev = KeResetEvent(Event);
ObDereferenceObject(Event);
-
- /* Return it */
- if(PreviousState) {
-
- _SEH_TRY {
-
+
+ /* Check if caller wants the old state back */
+ if(PreviousState)
+ {
+ /* Entry SEH Block for return */
+ _SEH_TRY
+ {
+ /* Return previous state */
*PreviousState = Prev;
-
- } _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) {
-
+ }
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ {
Status = _SEH_GetExceptionCode();
-
- } _SEH_END;
+ }
+ _SEH_END;
}
}
/*
* @implemented
*/
-NTSTATUS
-STDCALL
+NTSTATUS
+NTAPI
NtSetEvent(IN HANDLE EventHandle,
OUT PLONG PreviousState OPTIONAL)
{
PKEVENT Event;
KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
NTSTATUS Status = STATUS_SUCCESS;
-
PAGED_CODE();
DPRINT("NtSetEvent(EventHandle 0%x PreviousState 0%x)\n",
EventHandle, PreviousState);
- /* Check buffer validity */
- if(PreviousState != NULL && PreviousMode == UserMode) {
-
- _SEH_TRY {
-
- ProbeForWrite(PreviousState,
- sizeof(LONG),
- sizeof(ULONG));
- } _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) {
-
+ /* Check if we were called from user-mode */
+ if((PreviousState) && (PreviousMode != KernelMode))
+ {
+ /* Entry SEH Block */
+ _SEH_TRY
+ {
+ /* Make sure the state pointer is valid */
+ ProbeForWriteLong(PreviousState);
+ }
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ {
Status = _SEH_GetExceptionCode();
-
- } _SEH_END;
+ }
+ _SEH_END;
+ /* Bail out if pointer was invalid */
if(!NT_SUCCESS(Status)) return Status;
}
PreviousMode,
(PVOID*)&Event,
NULL);
-
- /* Check for success */
- if(NT_SUCCESS(Status)) {
+ /* Check for success */
+ if(NT_SUCCESS(Status))
+ {
/* Set the Event */
LONG Prev = KeSetEvent(Event, EVENT_INCREMENT, FALSE);
ObDereferenceObject(Event);
- /* Return it */
- if(PreviousState) {
-
- _SEH_TRY {
-
+ /* Check if caller wants the old state back */
+ if(PreviousState)
+ {
+ /* Entry SEH Block for return */
+ _SEH_TRY
+ {
+ /* Return previous state */
*PreviousState = Prev;
-
- } _SEH_EXCEPT(_SEH_ExSystemExceptionFilter) {
-
+ }
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ {
Status = _SEH_GetExceptionCode();
-
- } _SEH_END;
+ }
+ _SEH_END;
}
}
projects / reactos.git / blobdiff