cpp/openttd-patchpack/source Changeset - r28185:eb1c90f18fdd

Changeset - r28185:eb1c90f18fdd

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Peter Nelson - 12 months ago 2023-11-27 20:39:22
peter1138@openttd.org

Change: Try stopping extmidi player with SIGINT first. (#11404)

This may give the player a chance to issue MIDI note-off commands.

The kill/waitpid cycle is also less aggressive, waiting 50ms each time.

1 file changed with 27 insertions and 12 deletions:

src/music/extmidi.cpp

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src/music/extmidi.cpp

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@@ @@ -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

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