jack2/windows/JackWinTime.c

/*
 Copyright (C) 2004-2008 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.

 */


#include "JackTime.h"
#include "JackError.h"

static LARGE_INTEGER _jack_freq;
static UINT gPeriod = 0;

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

SERVER_EXPORT void InitTime()
{
    TIMECAPS caps;

    QueryPerformanceFrequency(&_jack_freq);
    if (timeGetDevCaps(&caps, sizeof(TIMECAPS)) != TIMERR_NOERROR) {
        jack_error("InitTime : could not get timer device");
    } else {
        gPeriod = caps.wPeriodMin;
        if (timeBeginPeriod(gPeriod) != TIMERR_NOERROR) {
            jack_error("InitTime : could not set minimum timer");
            gPeriod = 0;
        } else {
            jack_info("InitTime : multimedia timer resolution set to %d milliseconds", gPeriod);
       }
    }
}

SERVER_EXPORT void EndTime()
{
    if (gPeriod > 0) {
        timeEndPeriod(gPeriod);
    }
}

SERVER_EXPORT jack_time_t GetMicroSeconds(void)
{
	LARGE_INTEGER t1;
	QueryPerformanceCounter(&t1);
	return (jack_time_t)(((double)t1.QuadPart) / ((double)_jack_freq.QuadPart) * 1000000.0);
}

void SetClockSource(jack_timer_type_t source)
{}

const char* ClockSourceName(jack_timer_type_t source)
{
    return "";
}