root/trunk/libffado/src/libutil/Time.h

/*
 * Copyright (C) 2005-2007 by Pieter Palmers
 *
 * This file is part of FFADO
 * FFADO = Free Firewire (pro-)audio drivers for linux
 *
 * FFADO is based upon FreeBoB
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

/*
 * Copied from the jackd/jackdmp sources
 * function names changed in order to avoid naming problems when using this in
 * a jackd backend.
 */

/* Original license:
 *
 *  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 General Public License as published by
 *  the Free Software Foundation; either version 2 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#ifndef __Time__
#define __Time__

#include <stdio.h>
#include <inttypes.h>

// #define GETCYCLE_TIME

/**
 * Type used to represent the value of free running
 * monotonic clock with units of microseconds.
 */

typedef uint64_t ffado_microsecs_t;


#ifdef __cplusplus
extern "C"
{
#endif


#include <unistd.h>

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

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


#ifdef __cplusplus
}
#endif


#endif