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fix: Throttle X input events

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- Limit the amount of allowed input events
- Yield on lock failure
- Cleanup
This commit is contained in:
Michael Carlberg 2016-10-19 06:02:57 +02:00
parent adf18108c3
commit d879d6d42e
8 changed files with 132 additions and 116 deletions
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2
CMakeLists.txt
View File

@ -8,7 +8,7 @@ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${PROJECT_SOURCE_DIR}/cmake/modules)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14 -Wall -Wno-unused-parameter -Wno-unused-local-typedefs") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14 -Wall -Wno-unused-parameter -Wno-unused-local-typedefs")
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -DDEBUG -O0 -g2") set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -DDEBUG -O0 -g2")
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O1") set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O3")
set(CMAKE_C_STANDARD 11) set(CMAKE_C_STANDARD 11)
set(CMAKE_C_STANDARD_REQUIRED ON) set(CMAKE_C_STANDARD_REQUIRED ON)

9
include/components/bar.hpp
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@ -22,6 +22,7 @@
#include "utils/math.hpp" #include "utils/math.hpp"
#include "utils/string.hpp" #include "utils/string.hpp"
#include "utils/threading.hpp" #include "utils/threading.hpp"
#include "utils/throttle.hpp"
#if ENABLE_I3 #if ENABLE_I3
#include "utils/i3.hpp" #include "utils/i3.hpp"
#endif #endif
@ -83,6 +84,9 @@ class bar : public xpp::event::sink<evt::button_press, evt::expose, evt::propert
* This is done outside the constructor due to boost::di noexcept * This is done outside the constructor due to boost::di noexcept
*/ */
void bootstrap(bool nodraw = false) { //{{{ void bootstrap(bool nodraw = false) { //{{{
// limit the amount of allowed input events to 1 per 60ms
m_throttler = throttle_util::make_throttler(1, 60ms);
m_screen = m_connection.screen(); m_screen = m_connection.screen();
m_visual = m_connection.visual_type(m_screen, 32).get(); m_visual = m_connection.visual_type(m_screen, 32).get();
auto monitors = randr_util::get_monitors(m_connection, m_connection.screen()->root); auto monitors = randr_util::get_monitors(m_connection, m_connection.screen()->root);
@ -588,6 +592,10 @@ class bar : public xpp::event::sink<evt::button_press, evt::expose, evt::propert
* Mouse button event handler * Mouse button event handler
*/ */
void handle(const evt::button_press& evt) { // {{{ void handle(const evt::button_press& evt) { // {{{
if (!m_throttler->passthrough(throttle_util::strategy::try_once_or_leave_yolo{})) {
return;
}
std::lock_guard<threading_util::spin_lock> lck(m_lock); std::lock_guard<threading_util::spin_lock> lck(m_lock);
{ {
m_log.trace("bar: Received button press event: %i at pos(%i, %i)", m_log.trace("bar: Received button press event: %i at pos(%i, %i)",
@ -980,6 +988,7 @@ class bar : public xpp::event::sink<evt::button_press, evt::expose, evt::propert
unique_ptr<fontmanager> m_fontmanager; unique_ptr<fontmanager> m_fontmanager;
threading_util::spin_lock m_lock; threading_util::spin_lock m_lock;
throttle_util::throttle_t m_throttler;
xcb_screen_t* m_screen; xcb_screen_t* m_screen;
xcb_visualtype_t* m_visual; xcb_visualtype_t* m_visual;

30
include/components/controller.hpp
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@ -76,8 +76,6 @@ class controller {
m_log.trace("controller: Stop modules"); m_log.trace("controller: Stop modules");
for (auto&& block : m_modules) { for (auto&& block : m_modules) {
for (auto&& module : block.second) { for (auto&& module : block.second) {
module->on_update.clear();
module->on_stop.clear();
module->stop(); module->stop();
} }
} }
@ -211,9 +209,6 @@ class controller {
m_log.trace("controller: Start modules"); m_log.trace("controller: Start modules");
for (auto&& block : m_modules) { for (auto&& block : m_modules) {
for (auto&& module : block.second) { for (auto&& module : block.second) {
module->on_update.connect(this, &controller::on_module_update);
module->on_stop.connect(this, &controller::on_module_stop);
try { try {
module->start(); module->start();
} catch (const application_error& err) { } catch (const application_error& err) {
@ -407,6 +402,11 @@ class controller {
else else
throw application_error("Unknown module: " + module_name); throw application_error("Unknown module: " + module_name);
auto& module = modules.back();
module->set_writer(delegate::MakeDelegate(this, &controller::on_module_update));
module->set_terminator(delegate::MakeDelegate(this, &controller::on_module_stop));
module_count++; module_count++;
} }
} }
@ -415,14 +415,15 @@ class controller {
throw application_error("No modules created"); throw application_error("No modules created");
} }
void on_module_update(string module_name) { void on_module_update(string /* module_name */) {
if (!m_mutex.try_lock_for(50ms)) if (!m_mutex.try_lock_for(50ms)) {
this_thread::yield();
return; return;
}
std::lock_guard<std::timed_mutex> guard(m_mutex, std::adopt_lock); std::lock_guard<std::timed_mutex> guard(m_mutex, std::adopt_lock);
if (!m_running) if (!m_running)
return; return;
if (!m_throttler->passthrough(m_throttle_strategy)) { if (!m_throttler->passthrough(m_throttle_strategy)) {
m_log.trace("controller: Update event throttled"); m_log.trace("controller: Update event throttled");
return; return;
@ -489,7 +490,10 @@ class controller {
m_bar->parse(contents); m_bar->parse(contents);
} }
void on_module_stop(string module_name) { void on_module_stop(string /* module_name */) {
if (!m_running)
return;
for (auto&& block : m_modules) { for (auto&& block : m_modules) {
for (auto&& module : block.second) { for (auto&& module : block.second) {
if (module->running()) if (module->running())
@ -502,9 +506,12 @@ class controller {
} }
void on_module_click(string input) { void on_module_click(string input) {
if (!m_mutex.try_lock()) if (!m_clickmtx.try_lock()) {
this_thread::yield();
return; return;
std::lock_guard<std::timed_mutex> guard(m_mutex, std::adopt_lock); }
std::lock_guard<std::mutex> guard(m_clickmtx, std::adopt_lock);
for (auto&& block : m_modules) { for (auto&& block : m_modules) {
for (auto&& module : block.second) { for (auto&& module : block.second) {
@ -538,6 +545,7 @@ class controller {
unique_ptr<traymanager> m_traymanager; unique_ptr<traymanager> m_traymanager;
std::timed_mutex m_mutex; std::timed_mutex m_mutex;
std::mutex m_clickmtx;
stateflag m_stdout{false}; stateflag m_stdout{false};
stateflag m_running{false}; stateflag m_running{false};

184
include/modules/meta.hpp
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@ -18,8 +18,8 @@ LEMONBUDDY_NS
#define DEFAULT_FORMAT "format" #define DEFAULT_FORMAT "format"
#define DEFINE_MODULE(name, type) struct name : public type<name> #define DEFINE_MODULE(name, type) struct name : public type<name>
#define CONST_CAST_MODULE(name) static_cast<name const&>(*this) #define CONST_MOD(name) static_cast<name const&>(*this)
#define CAST_MODULE(name) static_cast<name*>(this) #define CAST_MOD(name) static_cast<name*>(this)
namespace modules { namespace modules {
using namespace drawtypes; using namespace drawtypes;
@ -153,14 +153,13 @@ namespace modules {
virtual void setup() = 0; virtual void setup() = 0;
virtual void start() = 0; virtual void start() = 0;
virtual void stop() = 0; virtual void stop() = 0;
virtual void refresh() = 0;
virtual string contents() = 0; virtual string contents() = 0;
virtual bool handle_event(string cmd) = 0; virtual bool handle_event(string cmd) = 0;
virtual bool receive_events() const = 0; virtual bool receive_events() const = 0;
delegate::Signal1<string> on_update; virtual void set_writer(delegate::Delegate1<string>&& fn) = 0;
delegate::Signal1<string> on_stop; virtual void set_terminator(delegate::Delegate1<string>&& fn) = 0;
}; };
// }}} // }}}
@ -178,10 +177,11 @@ namespace modules {
, m_formatter(make_unique<module_formatter>(m_conf, m_name)) {} , m_formatter(make_unique<module_formatter>(m_conf, m_name)) {}
~module() { ~module() {
stop(); CAST_MOD(Impl)->stop();
this->update_lock.unlock(); m_updatelock.unlock();
std::lock_guard<threading_util::spin_lock> lck(this->update_lock);
std::lock_guard<threading_util::spin_lock> lck(m_updatelock);
{ {
if (m_broadcast_thread.joinable()) if (m_broadcast_thread.joinable())
m_broadcast_thread.join(); m_broadcast_thread.join();
@ -190,43 +190,51 @@ namespace modules {
if (thread_.joinable()) if (thread_.joinable())
thread_.join(); thread_.join();
} }
m_threads.clear(); m_threads.clear();
} }
m_log.trace("%s: Done cleaning up", name()); m_log.trace("%s: Done cleaning up", name());
} }
void set_writer(delegate::Delegate1<string>&& fn) {
m_writer = forward<decltype(fn)>(fn);
}
void set_terminator(delegate::Delegate1<string>&& fn) {
m_terminator = forward<decltype(fn)>(fn);
}
string name() const { string name() const {
return m_name; return m_name;
} }
bool running() const { bool running() const {
return enabled(); return CONST_MOD(Impl).enabled();
} }
void setup() { void setup() {
m_log.trace("%s: Setup", name()); m_log.trace("%s: Setup", name());
CAST_MODULE(Impl)->setup(); CAST_MOD(Impl)->setup();
} }
void stop() { void stop() {
if (!enabled()) if (!enabled())
return; return;
std::unique_lock<threading_util::spin_lock> lck(this->update_lock);
enable(false); std::unique_lock<threading_util::spin_lock> lck(m_updatelock);
CAST_MODULE(Impl)->teardown(); {
lck.unlock(); enable(false);
m_log.trace("%s: Stop", name()); CAST_MOD(Impl)->teardown();
if (!on_stop.empty()) m_log.trace("%s: Stop", name());
on_stop.emit(name()); }
if (m_terminator)
m_terminator(name());
} }
void teardown() { void teardown() {
wakeup(); CAST_MOD(Impl)->wakeup();
}
void refresh() {
m_cache = CAST_MODULE(Impl)->get_output();
} }
string contents() { string contents() {
@ -234,7 +242,7 @@ namespace modules {
} }
bool handle_event(string cmd) { bool handle_event(string cmd) {
return CAST_MODULE(Impl)->handle_event(cmd); return CAST_MOD(Impl)->handle_event(cmd);
} }
bool receive_events() const { bool receive_events() const {
@ -253,15 +261,11 @@ namespace modules {
void broadcast() { void broadcast() {
if (!enabled()) if (!enabled())
return; return;
else if (!m_writer)
m_log.warn("%s: No attach writer, ignoring broadcast...", name());
refresh(); m_cache = CAST_MOD(Impl)->get_output();
m_writer(name());
if (contents().empty())
return;
else if (on_update.empty())
m_log.warn("%s: No signal handlers connected... ignoring broadcast", name());
else
on_update.emit(name());
} }
void idle() {} void idle() {}
@ -287,7 +291,7 @@ namespace modules {
return ""; return "";
} }
auto format_name = CONST_CAST_MODULE(Impl).get_format(); auto format_name = CONST_MOD(Impl).get_format();
auto format = m_formatter->get(format_name); auto format = m_formatter->get(format_name);
int i = 0; int i = 0;
@ -299,7 +303,7 @@ namespace modules {
if (tag[0] == '<' && tag[tag.length() - 1] == '>') { if (tag[0] == '<' && tag[tag.length() - 1] == '>') {
if (i > 0) if (i > 0)
m_builder->space(format->spacing); m_builder->space(format->spacing);
if (!(tag_built = CONST_CAST_MODULE(Impl).build(m_builder.get(), tag)) && i > 0) if (!(tag_built = CONST_MOD(Impl).build(m_builder.get(), tag)) && i > 0)
m_builder->remove_trailing_space(format->spacing); m_builder->remove_trailing_space(format->spacing);
if (tag_built) if (tag_built)
i++; i++;
@ -314,19 +318,11 @@ namespace modules {
} }
protected: protected:
// Called by modules after handling action events delegate::Delegate1<string> m_writer;
void event_handled() { delegate::Delegate1<string> m_terminator;
std::lock_guard<threading_util::spin_lock> lck(this->update_lock);
{
if (m_broadcast_thread.joinable())
m_broadcast_thread.join();
m_broadcast_thread = thread(&module::broadcast, this);
}
}
// concurrency::SpinLock output_lock; threading_util::spin_lock m_updatelock;
// concurrency::SpinLock broadcast_lock; // std::timed_mutex m_mutex;
threading_util::spin_lock update_lock;
const bar_settings m_bar; const bar_settings m_bar;
const logger& m_log; const logger& m_log;
@ -356,9 +352,9 @@ namespace modules {
using module<Impl>::module; using module<Impl>::module;
void start() { void start() {
CAST_MODULE(Impl)->setup(); CAST_MOD(Impl)->setup();
CAST_MODULE(Impl)->enable(true); CAST_MOD(Impl)->enable(true);
CAST_MODULE(Impl)->broadcast(); CAST_MOD(Impl)->broadcast();
} }
bool build(builder*, string) const { bool build(builder*, string) const {
@ -377,8 +373,8 @@ namespace modules {
using module<Impl>::module; using module<Impl>::module;
void start() { void start() {
CAST_MODULE(Impl)->enable(true); CAST_MOD(Impl)->enable(true);
CAST_MODULE(Impl)->m_threads.emplace_back(thread(&timer_module::runner, this)); CAST_MOD(Impl)->m_threads.emplace_back(thread(&timer_module::runner, this));
} }
protected: protected:
@ -386,20 +382,20 @@ namespace modules {
void runner() { void runner() {
try { try {
CAST_MODULE(Impl)->setup(); CAST_MOD(Impl)->setup();
while (CONST_CAST_MODULE(Impl).enabled()) { while (CONST_MOD(Impl).enabled()) {
{ {
std::lock_guard<threading_util::spin_lock> lck(this->update_lock); std::lock_guard<threading_util::spin_lock> lck(this->m_updatelock);
if (CAST_MODULE(Impl)->update()) if (CAST_MOD(Impl)->update())
CAST_MODULE(Impl)->broadcast(); CAST_MOD(Impl)->broadcast();
} }
CAST_MODULE(Impl)->sleep(m_interval); CAST_MOD(Impl)->sleep(m_interval);
} }
} catch (const std::exception& err) { } catch (const std::exception& err) {
this->m_log.err("%s: %s", this->name(), err.what()); this->m_log.err("%s: %s", CONST_MOD(Impl).name(), err.what());
this->m_log.warn("Stopping '%s'...", this->name()); this->m_log.warn("Stopping '%s'...", CONST_MOD(Impl).name());
CAST_MODULE(Impl)->stop(); CAST_MOD(Impl)->stop();
} }
} }
}; };
@ -413,33 +409,33 @@ namespace modules {
using module<Impl>::module; using module<Impl>::module;
void start() { void start() {
CAST_MODULE(Impl)->enable(true); CAST_MOD(Impl)->enable(true);
CAST_MODULE(Impl)->m_threads.emplace_back(thread(&event_module::runner, this)); CAST_MOD(Impl)->m_threads.emplace_back(thread(&event_module::runner, this));
} }
protected: protected:
void runner() { void runner() {
try { try {
CAST_MODULE(Impl)->setup(); CAST_MOD(Impl)->setup();
// warmup // warmup
CAST_MODULE(Impl)->update(); CAST_MOD(Impl)->update();
CAST_MODULE(Impl)->broadcast(); CAST_MOD(Impl)->broadcast();
while (CONST_CAST_MODULE(Impl).enabled()) { while (CONST_MOD(Impl).enabled()) {
std::lock_guard<threading_util::spin_lock> lck(this->update_lock); std::lock_guard<threading_util::spin_lock> lck(this->m_updatelock);
if (!CAST_MODULE(Impl)->has_event()) if (!CAST_MOD(Impl)->has_event())
CAST_MODULE(Impl)->idle(); CAST_MOD(Impl)->idle();
else if (!CAST_MODULE(Impl)->update()) else if (!CAST_MOD(Impl)->update())
CAST_MODULE(Impl)->idle(); CAST_MOD(Impl)->idle();
else else
CAST_MODULE(Impl)->broadcast(); CAST_MOD(Impl)->broadcast();
} }
} catch (const std::exception& err) { } catch (const std::exception& err) {
this->m_log.err("%s: %s", this->name(), err.what()); this->m_log.err("%s: %s", CONST_MOD(Impl).name(), err.what());
this->m_log.warn("Stopping '%s'...", this->name()); this->m_log.warn("Stopping '%s'...", CONST_MOD(Impl).name());
CAST_MODULE(Impl)->stop(); CAST_MOD(Impl)->stop();
} }
} }
}; };
@ -453,34 +449,34 @@ namespace modules {
using module<Impl>::module; using module<Impl>::module;
void start() { void start() {
CAST_MODULE(Impl)->enable(true); CAST_MOD(Impl)->enable(true);
CAST_MODULE(Impl)->m_threads.emplace_back(thread(&inotify_module::runner, this)); CAST_MOD(Impl)->m_threads.emplace_back(thread(&inotify_module::runner, this));
} }
protected: protected:
void runner() { void runner() {
try { try {
CAST_MODULE(Impl)->setup(); CAST_MOD(Impl)->setup();
CAST_MODULE(Impl)->on_event(nullptr); // warmup CAST_MOD(Impl)->on_event(nullptr); // warmup
CAST_MODULE(Impl)->broadcast(); CAST_MOD(Impl)->broadcast();
while (CAST_MODULE(Impl)->enabled()) { while (CAST_MOD(Impl)->enabled()) {
CAST_MODULE(Impl)->poll_events(); CAST_MOD(Impl)->poll_events();
} }
} catch (const std::exception& err) { } catch (const std::exception& err) {
this->m_log.err("%s: %s", this->name(), err.what()); this->m_log.err("%s: %s", CONST_MOD(Impl).name(), err.what());
this->m_log.warn("Stopping '%s'...", this->name()); this->m_log.warn("Stopping '%s'...", CONST_MOD(Impl).name());
CAST_MODULE(Impl)->stop(); CAST_MOD(Impl)->stop();
} }
} }
void watch(string path, int mask = IN_ALL_EVENTS) { void watch(string path, int mask = IN_ALL_EVENTS) {
this->m_log.trace("%s: Attach inotify at %s", this->name(), path); this->m_log.trace("%s: Attach inotify at %s", CONST_MOD(Impl).name(), path);
m_watchlist.insert(make_pair(path, mask)); m_watchlist.insert(make_pair(path, mask));
} }
void idle() { void idle() {
CAST_MODULE(Impl)->sleep(200ms); CAST_MOD(Impl)->sleep(200ms);
} }
void poll_events() { void poll_events() {
@ -494,28 +490,28 @@ namespace modules {
} catch (const system_error& e) { } catch (const system_error& e) {
watches.clear(); watches.clear();
this->m_log.err( this->m_log.err(
"%s: Error while creating inotify watch (what: %s)", this->name(), e.what()); "%s: Error while creating inotify watch (what: %s)", CONST_MOD(Impl).name(), e.what());
CAST_MODULE(Impl)->sleep(0.1s); CAST_MOD(Impl)->sleep(0.1s);
return; return;
} }
while (CONST_CAST_MODULE(Impl).enabled()) { while (CONST_MOD(Impl).enabled()) {
for (auto&& w : watches) { for (auto&& w : watches) {
this->m_log.trace("%s: Poll inotify watch %s", this->name(), w->path()); this->m_log.trace("%s: Poll inotify watch %s", CONST_MOD(Impl).name(), w->path());
std::lock_guard<threading_util::spin_lock> lck(this->update_lock); std::lock_guard<threading_util::spin_lock> lck(this->m_updatelock);
if (w->poll(1000 / watches.size())) { if (w->poll(1000 / watches.size())) {
auto event = w->get_event(); auto event = w->get_event();
w->remove(); w->remove();
if (CAST_MODULE(Impl)->on_event(event.get())) if (CAST_MOD(Impl)->on_event(event.get()))
CAST_MODULE(Impl)->broadcast(); CAST_MOD(Impl)->broadcast();
return; return;
} }
} }
CAST_MODULE(Impl)->idle(); CAST_MOD(Impl)->idle();
} }
} }

14
include/modules/script.hpp
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@ -38,7 +38,7 @@ namespace modules {
wakeup(); wakeup();
enable(false); enable(false);
m_command.reset(); m_command.reset();
std::lock_guard<threading_util::spin_lock> lck(this->update_lock); std::lock_guard<threading_util::spin_lock> lck(m_updatelock);
wakeup(); wakeup();
} }
@ -94,8 +94,8 @@ namespace modules {
m_log.trace("%s: Executing '%s'", name(), exec); m_log.trace("%s: Executing '%s'", name(), exec);
cmd->exec(); cmd->exec(true);
cmd->tail([this](string contents) { m_output = contents; }); cmd->tail([&](string output) { m_output = output; });
} catch (const std::exception& err) { } catch (const std::exception& err) {
m_log.err("%s: %s", name(), err.what()); m_log.err("%s: %s", name(), err.what());
throw module_error("Failed to execute command, stopping module..."); throw module_error("Failed to execute command, stopping module...");
@ -130,10 +130,12 @@ namespace modules {
} }
bool build(builder* builder, string tag) const { bool build(builder* builder, string tag) const {
if (tag != TAG_OUTPUT) if (tag == TAG_OUTPUT) {
builder->node(m_output);
return true;
} else {
return false; return false;
builder->node(string_util::replace_all(m_output, "\n", "")); }
return true;
} }
protected: protected:

3
include/modules/volume.hpp
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@ -195,6 +195,7 @@ namespace modules {
m_builder->cmd(mousebtn::SCROLL_DOWN, EVENT_VOLUME_DOWN); m_builder->cmd(mousebtn::SCROLL_DOWN, EVENT_VOLUME_DOWN);
m_builder->node(module::get_output()); m_builder->node(module::get_output());
return m_builder->flush(); return m_builder->flush();
} }
@ -251,8 +252,6 @@ namespace modules {
// sending the broadcast related to this event // sending the broadcast related to this event
m_muted = !m_muted; m_muted = !m_muted;
event_handled();
return true; return true;
} }

2
include/utils/command.hpp
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@ -148,7 +148,7 @@ namespace command_util {
if (WIFEXITED(m_forkstatus) && m_forkstatus > 0) if (WIFEXITED(m_forkstatus) && m_forkstatus > 0)
m_log.warn("command: Exited with failed status %d", WEXITSTATUS(m_forkstatus)); m_log.warn("command: Exited with failed status %d", WEXITSTATUS(m_forkstatus));
else if (WIFEXITED(m_forkstatus)) else if (WIFEXITED(m_forkstatus))
m_log.warn("command: Exited with status %d", WEXITSTATUS(m_forkstatus)); m_log.trace("command: Exited with status %d", WEXITSTATUS(m_forkstatus));
else if (WIFSIGNALED(m_forkstatus)) else if (WIFSIGNALED(m_forkstatus))
m_log.trace("command: killed by signal %d", WTERMSIG(m_forkstatus)); m_log.trace("command: killed by signal %d", WTERMSIG(m_forkstatus));
else if (WIFSTOPPED(m_forkstatus)) else if (WIFSTOPPED(m_forkstatus))

4
include/utils/throttle.hpp
View File

@ -101,8 +101,10 @@ namespace throttle_util {
timewindow m_timewindow; timewindow m_timewindow;
}; };
using throttle_t = unique_ptr<event_throttler>;
template <typename... Args> template <typename... Args>
auto make_throttler(Args&&... args) { throttle_t make_throttler(Args&&... args) {
return make_unique<event_throttler>(forward<Args>(args)...); return make_unique<event_throttler>(forward<Args>(args)...);
} }
} }