hxtick.h

著名的 helix realplayer 基于手机 symbian 系统的 播放器全套源代码

/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: RCSL 1.0/RPSL 1.0 
 *  
 * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved. 
 *      
 * The contents of this file, and the files included with this file, are 
 * subject to the current version of the RealNetworks Public Source License 
 * Version 1.0 (the "RPSL") available at 
 * http://www.helixcommunity.org/content/rpsl unless you have licensed 
 * the file under the RealNetworks Community Source License Version 1.0 
 * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl, 
 * in which case the RCSL will apply. You may also obtain the license terms 
 * directly from RealNetworks.  You may not use this file except in 
 * compliance with the RPSL or, if you have a valid RCSL with RealNetworks 
 * applicable to this file, the RCSL.  Please see the applicable RPSL or 
 * RCSL for the rights, obligations and limitations governing use of the 
 * contents of the file.  
 *  
 * This file is part of the Helix DNA Technology. RealNetworks is the 
 * developer of the Original Code and owns the copyrights in the portions 
 * it created. 
 *  
 * This file, and the files included with this file, is distributed and made 
 * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
 * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS 
 * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
 * 
 * Technology Compatibility Kit Test Suite(s) Location: 
 *    http://www.helixcommunity.org/content/tck 
 * 
 * Contributor(s): 
 *  
 * ***** END LICENSE BLOCK ***** */ 

#ifndef _HXTICK_H_
#define _HXTICK_H_

#ifdef _WIN16
#include <windows.h>
#include <mmsystem.h>
#elif defined(_WIN32)
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#undef WIN32_LEAN_AND_MEAN
#else
#include <windows.h>
#endif
#endif

#include "hxtypes.h"

/* We have added a HX_GET_BETTERTICKCOUNT which uses highly accurate timers
 * when the hardware and OS will allow and defaults back to the timers used
 * by HX_GET_TICKCOUNT when they are not available. Code which requires
 * accurate timing (i.e. better than 10-20ms) should probably use the
 * HX_GET_BETTERTICKCOUNT call. The wraparound and precision of both calls
 * should be the same - HX_GET_BETTERTICKCOUNT should always be more ACCURATE.
 */

#if defined(_MACINTOSH) || defined(_UNIX)
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
ULONG32 GetTickCount(void);
#define HX_GET_TICKCOUNT() GetTickCount()
#define HX_GET_BETTERTICKCOUNT() GetTickCount()
#ifdef __cplusplus
}
#endif /* __cplusplus */

#elif defined(_SYMBIAN)
# ifdef __cplusplus
extern "C"
{
# endif /* __cplusplus */
ULONG32 GetTickCount(void);
# define HX_GET_TICKCOUNT() GetTickCount()
# define HX_GET_BETTERTICKCOUNT() GetTickCount()
# ifdef __cplusplus
}
# endif /* __cplusplus */ /* SYMBIAN */

#elif defined(_OPENWAVE)
# ifdef __cplusplus
extern "C"
{
# endif /* __cplusplus */

ULONG32 GetTickCount(void);
#define HX_GET_TICKCOUNT() GetTickCount()
#define HX_GET_BETTERTICKCOUNT() GetTickCount()

# ifdef __cplusplus
}
# endif /* __cplusplus */ /* SYMBIAN */

#elif defined(_WIN32)
#define HX_GET_TICKCOUNT() GetTickCount()
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
ULONG32 GetBetterTickCount();

// Returns a ms system tick with double precision accuracy.
// Wraps at 2^32 -1 milliseconds.
double GetMSTickDouble32();
#ifdef __cplusplus
}
#endif /* __cplusplus */

/*
 * In 32bit Windows we have a HX_GET_BETTERTICKCOUNT()
 * which uses the queryPerformance interface for highly accurate times.
 * XXXKB: This implementation is now thread safe;
 */
#define HX_GET_BETTERTICKCOUNT() GetBetterTickCount()

/* WINDOWS DEFAULT */
#elif defined(_WINDOWS)
#define HX_GET_TICKCOUNT() GetTickCount()
#define HX_GET_BETTERTICKCOUNT() GetTickCount()

#else
#error hxtick.h::Undefined platform!
#endif // #ifdef __MWERKS__

#define MILLISECS_PER_SECOND	((ULONG32)1000)
#define CALCULATE_ELAPSED_TICKS(t1,t2)	((t2) - (t1))

// use this to measure a result from calculate_elapsed to ensure that
// time didn't go backwards
#define	SOME_VERY_LARGE_VALUE	 86400000 /* 1 day */ 

// Timestamp comparisons
#define IsTimeGreater(a, b)					\
    (((LONG32) ((a) - (b))) > 0)

#define IsTimeGreaterOrEqual(a, b)				\
    (((LONG32) ((a) - (b))) >= 0)

#define IsTimeLess(a, b)					\
    (((LONG32) ((a) - (b))) < 0)

#define IsTimeLessOrEqual(a, b)					\
    (((LONG32) ((a) - (b))) <= 0)
#endif //_HXTICK_H_