* Copyright (c) 2003-2004, Marcus Overhagen <marcus@overhagen.de>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "MediaDebug.h"
#include "SystemTimeSource.h"
SystemTimeSource::SystemTimeSource()
: BMediaNode("System clock"),
BTimeSource(),
fControlThread(-1)
{
TRACE("SystemTimeSource::SystemTimeSource\n");
}
SystemTimeSource::~SystemTimeSource()
{
TRACE("SystemTimeSource::~SystemTimeSource enter\n");
close_port(ControlPort());
if (fControlThread != -1) {
status_t err;
wait_for_thread(fControlThread, &err);
}
TRACE("SystemTimeSource::~SystemTimeSource exit\n");
}
BMediaAddOn*
SystemTimeSource::AddOn(int32 * internal_id) const
{
return NULL;
}
status_t
SystemTimeSource::TimeSourceOp(const time_source_op_info & op, void * _reserved)
{
TRACE("######## SystemTimeSource::TimeSourceOp\n");
bigtime_t real = RealTime();
PublishTime(real, real, 1.0);
return B_OK;
}
void
SystemTimeSource::NodeRegistered()
{
ASSERT(fControlThread == -1);
fControlThread = spawn_thread(_ControlThreadStart, "System clock control", 12, this);
resume_thread(fControlThread);
}
int32
SystemTimeSource::_ControlThreadStart(void *arg)
{
reinterpret_cast<SystemTimeSource *>(arg)->ControlThread();
return 0;
}
void
SystemTimeSource::ControlThread()
{
TRACE("SystemTimeSource::ControlThread() enter\n");
status_t err;
do {
err = WaitForMessage(B_INFINITE_TIMEOUT);
} while (err == B_OK || err == B_ERROR);
TRACE("SystemTimeSource::ControlThread() exit\n");
}
