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modules/mpd: take lock in waitForEvent to prevent SIGABORT

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+ replaced deprecated MPD_IDLE_PLAYLIST with MPD_IDLE_QUEUE
+ add mutex for periodic_updater
This commit is contained in:
Jonas Spanoghe 2019-09-19 21:43:12 +02:00
parent 5ee4c54b13
commit e6599d8ed5
2 changed files with 13 additions and 1 deletions
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3
include/modules/mpd.hpp
View File

@ -65,6 +65,9 @@ class MPD : public ALabel {
unique_status status_;
mpd_state state_;
unique_song song_;
// To make sure the previous periodic_updater stops before creating a new one
std::mutex periodic_lock_;
};
} // namespace waybar::modules

11
src/modules/mpd.cpp
View File

@ -41,6 +41,10 @@ auto waybar::modules::MPD::update() -> void {
if (connection_ != nullptr) {
try {
bool wasPlaying = playing();
if(!wasPlaying) {
// Wait until the periodic_updater has stopped
std::lock_guard periodic_guard(periodic_lock_);
}
fetchState();
if (!wasPlaying && playing()) {
periodic_updater().detach();
@ -75,6 +79,7 @@ std::thread waybar::modules::MPD::event_listener() {
std::thread waybar::modules::MPD::periodic_updater() {
return std::thread([this] {
std::lock_guard guard(periodic_lock_);
while (connection_ != nullptr && playing()) {
dp.emit();
std::this_thread::sleep_for(std::chrono::seconds(1));
@ -297,7 +302,7 @@ void waybar::modules::MPD::waitForEvent() {
// Wait for a player (play/pause), option (random, shuffle, etc.), or playlist
// change
if (!mpd_send_idle_mask(
conn, static_cast<mpd_idle>(MPD_IDLE_PLAYER | MPD_IDLE_OPTIONS | MPD_IDLE_PLAYLIST))) {
conn, static_cast<mpd_idle>(MPD_IDLE_PLAYER | MPD_IDLE_OPTIONS | MPD_IDLE_QUEUE))) {
checkErrors(conn);
return;
}
@ -306,6 +311,10 @@ void waybar::modules::MPD::waitForEvent() {
// See issue #277:
// https://github.com/Alexays/Waybar/issues/277
mpd_recv_idle(conn, /* disable_timeout = */ false);
// See issue #281:
// https://github.com/Alexays/Waybar/issues/281
std::lock_guard guard(connection_lock_);
checkErrors(conn);
mpd_response_finish(conn);