Leaked source code of windows server 2003
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4.5 KiB

/*++
Copyright(C) Microsoft Corporation 1997 - 1999
File:
uttime.cpp
Abstract:
Timer management utility API
History:
02/22/99 FredCh Created
--*/
#include <adcg.h>
#include <uttime.h>
#define TRC_GROUP TRC_GROUP_UTILITIES
#undef TRC_FILE
#define TRC_FILE "uttime"
extern "C"
{
#include <atrcapi.h>
}
#include "autil.h"
//-----------------------------------------------------------------------------
//
// UT_Timer structure returned as application timer handle
//
//-----------------------------------------------------------------------------
typedef struct _UT_Timer
{
HWND hWnd;
DCUINT EventId;
DCUINT ElaspeTime;
INT_PTR hTimer;
} UT_TIMER;
typedef UT_TIMER * PUT_TIMER;
typedef PUT_TIMER LPUT_TIMER;
//-----------------------------------------------------------------------------
//
// Function:
//
// UTCreateTimer
//
// Description:
//
// Create a timer handle
//
// Parameters:
//
// hWnd - Window handle to receive timer notification.
// nIDEvent - Timer ID to identify this timer event
// uElaspe - Elaspe time before a timer notification is sent
//
// Return:
//
// A non-NULL handle if successful. Returns NULL if failed.
//
//
//-----------------------------------------------------------------------------
HANDLE
CUT::UTCreateTimer(
HWND hWnd,
DCUINT nIDEvent,
DCUINT uElapse )
{
PUT_TIMER
pNewTimer;
pNewTimer = ( PUT_TIMER )UTMalloc( sizeof( UT_TIMER ) );
if( NULL == pNewTimer )
{
return( NULL );
}
pNewTimer->hWnd = hWnd;
pNewTimer->EventId = nIDEvent;
pNewTimer->ElaspeTime = uElapse;
pNewTimer->hTimer = 0;
return( ( HANDLE )pNewTimer );
}
//-----------------------------------------------------------------------------
//
// Function:
//
// UTStartTimer
//
// Description:
//
// Start the identified by the given timer handle
//
// Parameter:
//
// Timer handle identifying a timer that was previously created by
// UTCreateTimer
//
// Return:
//
// TRUE if the timer is started successfully or FALSE otherwise.
//
//-----------------------------------------------------------------------------
DCBOOL
CUT::UTStartTimer(
HANDLE hTimer )
{
PUT_TIMER
pTimer = ( PUT_TIMER )hTimer;
if( NULL == pTimer )
{
return( FALSE );
}
if( pTimer->hTimer )
{
//
// stop the old timer
//
UTStopTimer( hTimer );
}
//
// start a new timer
//
pTimer->hTimer = SetTimer(
pTimer->hWnd,
pTimer->EventId,
pTimer->ElaspeTime,
NULL );
if( 0 == pTimer )
{
return( FALSE );
}
return( TRUE );
}
//-----------------------------------------------------------------------------
//
// Function:
//
// UTStopTimer
//
// Description:
//
// Stops a timer.
//
// Parameters:
//
// hTimer - Timer handle identifying a timer that was started.
//
// Return:
//
// TRUE if the timer is stopped successfully or FALSE otherwise.
//
//-----------------------------------------------------------------------------
DCBOOL
CUT::UTStopTimer(
HANDLE hTimer )
{
PUT_TIMER
pTimer = ( PUT_TIMER )hTimer;
if( NULL == pTimer )
{
return( FALSE );
}
if( 0 == pTimer->hTimer )
{
return( FALSE );
}
if( KillTimer( pTimer->hWnd, pTimer->hTimer ) )
{
pTimer->hTimer = 0;
return( TRUE );
}
return( FALSE );
}
//-----------------------------------------------------------------------------
//
// Function:
//
// UTDeleteTimer
//
// Description:
//
// Deletes a timer. The timer handle can no longer be used after it has
// been deleted.
//
// Parameters:
//
// hTimer - Timer handle identifying the timer to be deleted.
//
// Return:
//
// TRUE if the timer is deleted successfully or FALSE otherwise.
//
//-----------------------------------------------------------------------------
DCBOOL
CUT::UTDeleteTimer(
HANDLE hTimer )
{
if( NULL == ( PUT_TIMER )hTimer )
{
return( FALSE );
}
UTStopTimer( hTimer );
UTFree( ( PDCVOID )hTimer );
return( TRUE );
}