jack2/common/JackTime.h

/*
Copyright (C) 2001-2003 Paul Davis
Copyright (C) 2004-2006 Grame

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software 
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

*/

#ifndef __JackTime__
#define __JackTime__

#include "types.h"
#include "JackExports.h"
#include <stdio.h>

#ifdef __cplusplus
extern "C"
{
#endif

#if defined(__APPLE__)

#include <mach/mach_time.h>
	#include <unistd.h>

    extern double __jack_time_ratio;

    static inline jack_time_t GetMicroSeconds(void) {
        return (jack_time_t) (mach_absolute_time () * __jack_time_ratio);
    }

    /* This should only be called ONCE per process. */
    extern void InitTime();

    static inline void JackSleep(long usec) {
        usleep(usec);
    }

#endif

#ifdef WIN32

    extern EXPORT LARGE_INTEGER _jack_freq;

    /*
    static jack_time_t  GetMicroSeconds(void) {
    	LARGE_INTEGER t1;
    	QueryPerformanceCounter (&t1);
    	return (jack_time_t)(((double)t1.QuadPart)/((double)_jack_freq.QuadPart));		
    }
    */

    extern EXPORT jack_time_t GetMicroSeconds(void) ;

    extern void InitTime();

    static void JackSleep(long usec) {
        Sleep(usec / 1000);
    }

#endif

#ifdef linux

#include <unistd.h>

    static inline void JackSleep(long usec) {
        usleep(usec);
    }

#ifdef GETCYCLE_TIME
	#include "cycles.h"
    extern jack_time_t __jack_cpu_mhz;
    extern jack_time_t GetMhz();
    extern void InitTime();
    static inline jack_time_t GetMicroSeconds (void) {
        return get_cycles() / __jack_cpu_mhz;
    }
#else
	#include <time.h>
    extern void InitTime();
    static inline jack_time_t GetMicroSeconds (void) {
        struct timespec ts;
        clock_gettime(CLOCK_MONOTONIC, &ts);
        return (jack_time_t)ts.tv_sec * 1000000 + ts.tv_nsec / 1000;
    }
#endif

#endif

#ifdef __cplusplus
}
#endif


#endif