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96 lines
2.4 KiB
C
96 lines
2.4 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS Win32 Base API
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* FILE: dll/win32/kernel32/client/resnotify.c
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* PURPOSE: Memory Resource Notifications
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* PROGRAMMER: Thomas Weidenmueller <w3seek@reactos.com>
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*/
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/* INCLUDES *******************************************************************/
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#include <k32.h>
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#define NDEBUG
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#include <debug.h>
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/* FUNCTIONS ******************************************************************/
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/*
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* @implemented
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*/
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HANDLE
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WINAPI
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CreateMemoryResourceNotification(IN MEMORY_RESOURCE_NOTIFICATION_TYPE NotificationType)
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{
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UNICODE_STRING EventName;
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OBJECT_ATTRIBUTES ObjectAttributes;
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HANDLE hEvent;
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NTSTATUS Status;
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if (NotificationType > HighMemoryResourceNotification)
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{
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SetLastError(ERROR_INVALID_PARAMETER);
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return NULL;
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}
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RtlInitUnicodeString(&EventName,
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NotificationType ?
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L"\\KernelObjects\\HighMemoryCondition" :
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L"\\KernelObjects\\LowMemoryCondition");
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InitializeObjectAttributes(&ObjectAttributes,
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&EventName,
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0,
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BaseGetNamedObjectDirectory(),
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NULL);
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Status = NtOpenEvent(&hEvent,
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EVENT_QUERY_STATE | SYNCHRONIZE,
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&ObjectAttributes);
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if (!NT_SUCCESS(Status))
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{
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BaseSetLastNTError(Status);
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return NULL;
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}
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return hEvent;
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}
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/*
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* @implemented
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*/
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BOOL
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WINAPI
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QueryMemoryResourceNotification(IN HANDLE ResourceNotificationHandle,
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OUT PBOOL ResourceState)
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{
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EVENT_BASIC_INFORMATION EventInfo;
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NTSTATUS Status;
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if ((ResourceNotificationHandle) &&
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(ResourceNotificationHandle != INVALID_HANDLE_VALUE) &&
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(ResourceState))
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{
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Status = NtQueryEvent(ResourceNotificationHandle,
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EventBasicInformation,
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&EventInfo,
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sizeof(EventInfo),
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NULL);
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if (NT_SUCCESS(Status))
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{
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*ResourceState = (EventInfo.EventState == 1);
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return TRUE;
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}
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BaseSetLastNTError(Status);
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}
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else
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{
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SetLastError(ERROR_INVALID_PARAMETER);
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}
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return FALSE;
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}
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/* EOF */
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