Paul Davis
69b7b53aec
git-svn-id: svn://localhost/ardour2/branches/3.0@7346 d708f5d6-7413-0410-9779-e7cbd77b26cf
119 lines
2.4 KiB
C++
119 lines
2.4 KiB
C++
/*
|
|
Copyright (C) 2009 Paul Davis
|
|
|
|
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.
|
|
|
|
*/
|
|
|
|
#include <cstdlib>
|
|
#include <cerrno>
|
|
#include <cstring>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
|
|
#include "pbd/error.h"
|
|
#include "pbd/crossthread.h"
|
|
|
|
using namespace std;
|
|
using namespace PBD;
|
|
using namespace Glib;
|
|
|
|
CrossThreadChannel::CrossThreadChannel ()
|
|
{
|
|
_ios = 0;
|
|
fds[0] = -1;
|
|
fds[1] = -1;
|
|
|
|
if (pipe (fds)) {
|
|
error << "cannot create x-thread pipe for read (%2)" << ::strerror (errno) << endmsg;
|
|
return;
|
|
}
|
|
|
|
if (fcntl (fds[0], F_SETFL, O_NONBLOCK)) {
|
|
error << "cannot set non-blocking mode for x-thread pipe (read) (" << ::strerror (errno) << ')' << endmsg;
|
|
return;
|
|
}
|
|
|
|
if (fcntl (fds[1], F_SETFL, O_NONBLOCK)) {
|
|
error << "cannot set non-blocking mode for x-thread pipe (write) (%2)" << ::strerror (errno) << ')' << endmsg;
|
|
return;
|
|
}
|
|
}
|
|
|
|
CrossThreadChannel::~CrossThreadChannel ()
|
|
{
|
|
/* glibmm hack */
|
|
drop_ios ();
|
|
|
|
if (fds[0] >= 0) {
|
|
close (fds[0]);
|
|
fds[0] = -1;
|
|
}
|
|
|
|
if (fds[1] >= 0) {
|
|
close (fds[1]);
|
|
fds[1] = -1;
|
|
}
|
|
}
|
|
|
|
void
|
|
CrossThreadChannel::wakeup ()
|
|
{
|
|
char c = 0;
|
|
(void) ::write (fds[1], &c, 1);
|
|
}
|
|
|
|
RefPtr<IOSource>
|
|
CrossThreadChannel::ios ()
|
|
{
|
|
if (!_ios) {
|
|
_ios = new RefPtr<IOSource> (IOSource::create (fds[0], IOCondition(IO_IN|IO_PRI|IO_ERR|IO_HUP|IO_NVAL)));
|
|
}
|
|
return *_ios;
|
|
}
|
|
|
|
void
|
|
CrossThreadChannel::drop_ios ()
|
|
{
|
|
delete _ios;
|
|
_ios = 0;
|
|
}
|
|
|
|
void
|
|
CrossThreadChannel::drain ()
|
|
{
|
|
drain (fds[0]);
|
|
}
|
|
|
|
void
|
|
CrossThreadChannel::drain (int fd)
|
|
{
|
|
/* drain selectable fd */
|
|
char buf[64];
|
|
while (::read (fd, buf, sizeof (buf)) > 0);
|
|
}
|
|
|
|
int
|
|
CrossThreadChannel::deliver (char msg)
|
|
{
|
|
return ::write (fds[1], &msg, 1);
|
|
}
|
|
|
|
int
|
|
CrossThreadChannel::receive (char& msg)
|
|
{
|
|
return ::read (fds[0], &msg, 1);
|
|
}
|