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103 lines
2.3 KiB
C
103 lines
2.3 KiB
C
/* $Id$
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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: lib/kernel32/mem/resnotify.c
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* PURPOSE: Memory Resource Notification
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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(
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MEMORY_RESOURCE_NOTIFICATION_TYPE NotificationType
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)
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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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switch(NotificationType)
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{
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case LowMemoryResourceNotification:
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RtlInitUnicodeString(&EventName, L"\\KernelObjects\\LowMemoryCondition");
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break;
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case HighMemoryResourceNotification:
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RtlInitUnicodeString(&EventName, L"\\KernelObjects\\HighMemoryCondition");
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break;
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default:
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SetLastError(ERROR_INVALID_PARAMETER);
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return NULL;
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}
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InitializeObjectAttributes(&ObjectAttributes,
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&EventName,
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0,
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hBaseDir,
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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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SetLastErrorByStatus(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(
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HANDLE ResourceNotificationHandle,
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PBOOL ResourceState
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)
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{
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EVENT_BASIC_INFORMATION ebi;
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NTSTATUS Status;
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if(ResourceState != NULL)
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{
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Status = NtQueryEvent(ResourceNotificationHandle,
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EventBasicInformation,
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&ebi,
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sizeof(ebi),
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NULL);
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if(NT_SUCCESS(Status))
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{
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*ResourceState = ebi.EventState;
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return TRUE;
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}
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SetLastErrorByStatus(Status);
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}
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else /* ResourceState == NULL */
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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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