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PC World Komputer 1998 May
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PITimer.h
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1997-10-19
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/*____________________________________________________________________________*\
*
Copyright (c) 1997 John Roy. All rights reserved.
These sources, libraries and applications are
FREE FOR COMMERCIAL AND NON-COMMERCIAL USE
as long as the following conditions are adhered to.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
3. Redistributions of any form whatsoever and all advertising materials
mentioning features must contain the following
acknowledgment:
"This product includes software developed by John Roy
(http://www.johnroy.com/pi3/)."
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHORS OR ITS CONTRIBUTORS BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
OF THE POSSIBILITY OF SUCH DAMAGE.
*____________________________________________________________________________*|
*
* $Source: PITimer.h$
* $Date: Sun Aug 10 06:29:39 1997$
*
Description:
Definition of timer functions.
\*____________________________________________________________________________*/
/* $HeaderTop:$ */
#ifndef PITIMER_H_
#define PITIMER_H_
#include "PiAPI.h"
#include "PISync.h"
#include "PIThread.h"
/*____________________________________________________________________________*\
*
Typedefs:
\*____________________________________________________________________________*/
typedef struct Timer PITimer;
/*____________________________________________________________________________*\
*
Name:
PITimer_new
Synopsis:
PITimer *PITimer_new()
Description:
Allocates and returns a pointer to a new timer object.
Notes:
Timer internals and API functions support microsecond resolution, however,
most operating systems will not support this granularity. Actual
timer resolution is operating system dependant.
Return Values:
Returns a pointer to a new Timer object.
Errors:
On error PITimer_new() returns NULL. The function
PITimer_getLastError() can be used to get more specific
error information.
See Also:
PITimer_delete()
\*____________________________________________________________________________*/
PUBLIC_PIAPI PITimer *PITimer_new();
/*____________________________________________________________________________*\
*
Name:
PITimer_reset
Synopsis:
int PITimer_reset( PITimer *pTimer )
Description:
Reset the timer to 0 seconds and 0 microseconds.
Notes:
Return Values:
Returns PIAPI_COMPLETED on success.
Errors:
On error PIAPI_ERROR is returned. The function PITimer_getLastError()
returns more specific error information.
See Also:
PITimer_elapsed()
\*____________________________________________________________________________*/
PUBLIC_PIAPI int PITimer_reset( PITimer *pTimer );
/*____________________________________________________________________________*\
*
Name:
PITimer_elapsed
Synopsis:
int PITimer_elapsed( PITimer *pTimer, long *plSeconds,
long *plMicroSeconds )
Description:
Returns the number of seconds and microseconds elapsed since the
timer was last reset.
Notes:
If plSeconds is NULL, the number of seconds will not be set.
If plMicroSeconds is NULL, the number of microseconds will not be set.
Return Values:
Returns PIAPI_COMPLETED on success.
Errors:
On error PIAPI_ERROR is returned. The function PITimer_getLastError()
returns more specific error information.
See Also:
PITimer_reset()
\*____________________________________________________________________________*/
PUBLIC_PIAPI int PITimer_elapsed( PITimer *pTimer, long *plSeconds,
long *plMicroSeconds );
/*____________________________________________________________________________*\
*
Name:
PITimer_delete
Synopsis:
int PITimer_delete( PITimer *pTimer )
Description:
Destroys a timer object and deallocates memory associated with it.
Notes:
Return Values:
Returns PIAPI_COMPLETED on success.
Errors:
On error PIAPI_ERROR is returned. The function PITimer_getLastError()
returns more specific error information.
See Also:
PITimer_new()
\*____________________________________________________________________________*/
PUBLIC_PIAPI int PITimer_delete( PITimer *pTimer );
#endif /* PITIMER_H_ */