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polybar
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refactor(controller): Force shutdown if dead lock 

If the mutex haven't been successfully locked after
3 seconds, force shutdown by raising SIGKILL.
This to ensure termination in case of a dead lock.
This commit is contained in:
Michael Carlberg 2016-10-11 05:01:25 +02:00
parent 20350e5fe6
commit 565a6d7032
1 changed files with 16 additions and 6 deletions
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22
include/components/controller.hpp
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@ -56,7 +56,12 @@ class controller {
* threads and spawned processes
*/
~controller() noexcept {
std::lock_guard<threading_util::spin_lock> lck(m_lock);
if (!m_mutex.try_lock_for(3s)) {
m_log.warn("Failed to acquire lock for 3s... Forcing shutdown using SIGKILL");
raise(SIGKILL);
}
std::lock_guard<std::timed_mutex> guard(m_mutex, std::adopt_lock);
m_log.trace("controller: Stop modules");
for (auto&& block : m_modules) {
@ -385,13 +390,15 @@ class controller {
}
void on_module_update(string module_name) {
std::lock_guard<threading_util::spin_lock> lck(m_lock);
if (!m_mutex.try_lock())
return;
std::lock_guard<std::timed_mutex> guard(m_mutex, std::adopt_lock);
if (!m_running)
return;
if (!m_throttler->passthrough(throttle_util::strategy::try_once_or_leave_yolo{})) {
m_log.trace("Throttled");
if (!m_throttler->passthrough(m_throttle_strategy)) {
m_log.trace("controller: Update event throttled");
return;
}
@ -457,7 +464,9 @@ class controller {
}
void on_module_click(string input) {
std::lock_guard<threading_util::spin_lock> lck(m_lock);
if (!m_mutex.try_lock())
return;
std::lock_guard<std::timed_mutex> guard(m_mutex, std::adopt_lock);
for (auto&& block : m_modules) {
for (auto&& module : block.second) {
@ -492,7 +501,7 @@ class controller {
unique_ptr<bar> m_bar;
unique_ptr<traymanager> m_traymanager;
threading_util::spin_lock m_lock;
std::timed_mutex m_mutex;
stateflag m_stdout{false};
stateflag m_running{false};
@ -506,6 +515,7 @@ class controller {
map<alignment, vector<module_t>> m_modules;
unique_ptr<throttle_util::event_throttler> m_throttler;
throttle_util::strategy::try_once_or_leave_yolo m_throttle_strategy;
};
LEMONBUDDY_NS_END