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/*
$Id: event_trigger_unix.cpp,v 1.5 2001/12/22 11:25:19 mbn Exp $
------------------------------------------------------------------------
ClanLib, the platform independent game SDK.
This library is distributed under the GNU LIBRARY GENERAL PUBLIC LICENSE
version 2. See COPYING for details.
For a total list of contributers see CREDITS.
------------------------------------------------------------------------
*/
#include "Core/precomp.h"
#include "event_trigger_unix.h"
// note: this cannot be replaced by <ctime>! (timeval needs to be defined)
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
/////////////////////////////////////////////////////////////////////////////
// CL_EventTrigger_Unix construction:
CL_EventTrigger_Unix::CL_EventTrigger_Unix()
{
pipe(wait_pipe);
}
CL_EventTrigger_Unix::~CL_EventTrigger_Unix()
{
close(wait_pipe[0]);
close(wait_pipe[1]);
}
/////////////////////////////////////////////////////////////////////////////
// CL_EventTrigger_Unix attributes:
bool CL_EventTrigger_Unix::get_flag() const
{
return wait(0);
}
/////////////////////////////////////////////////////////////////////////////
// CL_EventTrigger_Unix operations:
void CL_EventTrigger_Unix::reset() const
{
char v = 0;
while (wait(0)) read(wait_pipe[0], &v, 1);
}
void CL_EventTrigger_Unix::set_flag()
{
char v = 1;
if (!wait(0)) write(wait_pipe[1], &v, 1);
}
bool CL_EventTrigger_Unix::wait(int timeout) const
{
fd_set rfds;
FD_ZERO(&rfds);
FD_SET(wait_pipe[0], &rfds);
timeval tv;
tv.tv_sec = timeout/1000;
tv.tv_usec = (timeout%1000)*1000;
int result = select(wait_pipe[0]+1, &rfds, NULL, NULL, (timeout == -1) ? NULL : &tv);
if (result <= 0) return false;
return true;
}
/////////////////////////////////////////////////////////////////////////////
// CL_EventTrigger_Unix implementation:
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