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CrossThreadChannel::CrossThreadChannel (bool non_blocking)
: receive_channel (0)
{
fds[0] = -1;
fds[1] = -1;
if (pipe (fds)) {
error << "cannot create x-thread pipe for read (%2)" << ::strerror (errno) << endmsg;
return;
}
if (non_blocking) {
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;
}
}
receive_channel = g_io_channel_unix_new (fds[0]);
}
CrossThreadChannel::~CrossThreadChannel ()
{
if (receive_channel) {
g_io_channel_unref (receive_channel);
}
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);
}
void
CrossThreadChannel::drain ()
{
char buf[64];
while (::read (fds[0], 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);
}
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