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/*
(c) Copyright 2012-2013 DirectFB integrated media GmbH
(c) Copyright 2001-2013 The world wide DirectFB Open Source Community (directfb.org)
(c) Copyright 2000-2004 Convergence (integrated media) GmbH
All rights reserved.
Written by Denis Oliver Kropp <dok@directfb.org>,
Andreas Shimokawa <andi@directfb.org>,
Marek Pikarski <mass@directfb.org>,
Sven Neumann <neo@directfb.org>,
Ville Syrjälä <syrjala@sci.fi> and
Claudio Ciccani <klan@users.sf.net>.
This library 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 of the License, or (at your option) any later version.
This library 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 library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include <time.h>
#include <unistd.h>
#include <direct/clock.h>
#include <direct/messages.h>
#include <direct/util.h>
/**********************************************************************************************************************/
static long long session_clock_offset;
/**********************************************************************************************************************/
__attribute__((no_instrument_function))
long long
direct_clock_get_time( DirectClockType type )
{
long long micros;
struct timespec spec;
clockid_t clock_id;
switch (type) {
case DIRECT_CLOCK_REALTIME:
clock_id = CLOCK_REALTIME;
break;
case DIRECT_CLOCK_SESSION:
case DIRECT_CLOCK_MONOTONIC:
clock_id = CLOCK_MONOTONIC;
break;
case DIRECT_CLOCK_PROCESS_CPUTIME_ID:
clock_id = CLOCK_PROCESS_CPUTIME_ID;
break;
case DIRECT_CLOCK_THREAD_CPUTIME_ID:
clock_id = CLOCK_THREAD_CPUTIME_ID;
break;
default:
D_BUG( "invalid clock type %d", type );
return DR_INVARG;
}
if (clock_gettime( clock_id, &spec ) < 0) {
if (clock_id != CLOCK_REALTIME) {
D_WARN( "clock with id %d not supported by system", clock_id );
return direct_clock_get_time( DIRECT_CLOCK_REALTIME );
}
D_PERROR( "Direct/Clock: Could not get even real time clock!\n" );
return 0;
}
micros = spec.tv_sec * 1000000LL + spec.tv_nsec / 1000LL;
if (type == DIRECT_CLOCK_SESSION)
micros -= session_clock_offset;
return micros;
}
DirectResult
direct_clock_set_time( DirectClockType type,
long long micros )
{
DirectResult ret = DR_OK;
struct timespec spec;
clockid_t clock_id;
switch (type) {
case DIRECT_CLOCK_SESSION:
session_clock_offset = micros;
return DR_OK;
case DIRECT_CLOCK_REALTIME:
clock_id = CLOCK_REALTIME;
break;
case DIRECT_CLOCK_MONOTONIC:
clock_id = CLOCK_MONOTONIC;
break;
case DIRECT_CLOCK_PROCESS_CPUTIME_ID:
clock_id = CLOCK_PROCESS_CPUTIME_ID;
break;
case DIRECT_CLOCK_THREAD_CPUTIME_ID:
clock_id = CLOCK_THREAD_CPUTIME_ID;
break;
default:
D_BUG( "invalid clock type %d", type );
return DR_INVARG;
}
spec.tv_sec = micros / 1000000LL;
spec.tv_nsec = micros % 1000000LL * 1000LL;
if (clock_settime( clock_id, &spec ) < 0) {
ret = errno2result( errno );
D_PERROR( "Direct/Clock: Could not set clock with id %d!\n", clock_id );
}
return ret;
}
long long
direct_clock_resolution( DirectClockType type )
{
struct timespec spec;
clockid_t clock_id;
switch (type) {
case DIRECT_CLOCK_SESSION:
case DIRECT_CLOCK_REALTIME:
clock_id = CLOCK_REALTIME;
break;
case DIRECT_CLOCK_MONOTONIC:
clock_id = CLOCK_MONOTONIC;
break;
case DIRECT_CLOCK_PROCESS_CPUTIME_ID:
clock_id = CLOCK_PROCESS_CPUTIME_ID;
break;
case DIRECT_CLOCK_THREAD_CPUTIME_ID:
clock_id = CLOCK_THREAD_CPUTIME_ID;
break;
default:
D_BUG( "invalid clock type %d", type );
return DR_INVARG;
}
if (clock_getres( clock_id, &spec ) < 0) {
if (clock_id != CLOCK_REALTIME) {
D_WARN( "clock with id %d not supported by system", clock_id );
return direct_clock_resolution( DIRECT_CLOCK_REALTIME );
}
D_PERROR( "Direct/Clock: Could not get even real time clock resolution!\n" );
return 0;
}
return spec.tv_sec * 1000000LL + spec.tv_nsec / 1000LL;
}
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