|
@@ -130,22 +130,37 @@ void MusicDriver_ExtMidi::DoPlay()
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* Try to end child process with kill/waitpid for up to 1 second.
|
|
|
* @param pid The process ID to end.
|
|
|
* @param signal The signal type to send.
|
|
|
* @return True if the process has been ended.
|
|
|
*/
|
|
|
static bool KillWait(pid_t &pid, int signal)
|
|
|
{
|
|
|
/* First try to stop for about a second;
|
|
|
* 1 seconds = 1000 milliseconds, 50 ms per cycle => 20 cycles. */
|
|
|
for (int i = 0; i < 20; i++) {
|
|
|
kill(pid, signal);
|
|
|
if (waitpid(pid, nullptr, WNOHANG) == pid) {
|
|
|
/* It has shut down, so we are done */
|
|
|
pid = -1;
|
|
|
return true;
|
|
|
}
|
|
|
/* Wait 50 milliseconds. */
|
|
|
CSleep(50);
|
|
|
}
|
|
|
|
|
|
return false;
|
|
|
}
|
|
|
|
|
|
void MusicDriver_ExtMidi::DoStop()
|
|
|
{
|
|
|
if (this->pid <= 0) return;
|
|
|
|
|
|
/* First try to gracefully stop for about five seconds;
|
|
|
* 5 seconds = 5000 milliseconds, 10 ms per cycle => 500 cycles. */
|
|
|
for (int i = 0; i < 500; i++) {
|
|
|
kill(this->pid, SIGTERM);
|
|
|
if (waitpid(this->pid, nullptr, WNOHANG) == this->pid) {
|
|
|
/* It has shut down, so we are done */
|
|
|
this->pid = -1;
|
|
|
return;
|
|
|
}
|
|
|
/* Wait 10 milliseconds. */
|
|
|
CSleep(10);
|
|
|
}
|
|
|
if (KillWait(this->pid, SIGINT)) return;
|
|
|
|
|
|
if (KillWait(this->pid, SIGTERM)) return;
|
|
|
|
|
|
Debug(driver, 0, "extmidi: gracefully stopping failed, trying the hard way");
|
|
|
/* Gracefully stopping failed. Do it the hard way
|