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util-event: Rest of fb5041a69d

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Michael Fabian 'Xaymar' Dirks 2020-02-14 07:32:17 +01:00
parent baf265fd5b
commit 681a586ae9
1 changed files with 104 additions and 60 deletions
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164
source/util-event.hpp
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@ -25,105 +25,149 @@
namespace util {
template<typename... _args>
class event {
std::list<std::function<void(_args...)>> listeners;
std::recursive_mutex lock;
std::list<std::function<void(_args...)>> _listeners;
std::recursive_mutex _lock;
std::function<void()> listen_cb;
std::function<void()> silence_cb;
std::function<void()> _cb_fill;
std::function<void()> _cb_clear;
public /* functions */:
// Destructor
public /* constructor */:
event() : _listeners(), _lock(), _cb_fill(), _cb_clear() {}
virtual ~event()
{
std::lock_guard<std::recursive_mutex> lock;
std::lock_guard<std::recursive_mutex> lg(_lock);
this->clear();
}
// Add new listener.
inline void add(std::function<void(_args...)> listener)
{
std::lock_guard<std::recursive_mutex> lock;
if (listeners.size() == 0) {
if (listen_cb) {
listen_cb();
}
}
listeners.push_back(listener);
}
/* Copy Constructor */
event(const event<_args...>&) = delete;
// Remove existing listener.
inline void remove(std::function<void(_args...)> listener)
/* Move Constructor */
event(event<_args...>&& other) : event()
{
std::lock_guard<std::recursive_mutex> lock;
listeners.remove(listener);
if (listeners.size() == 0) {
if (silence_cb) {
silence_cb();
}
}
}
std::lock_guard<std::recursive_mutex> lg(_lock);
std::lock_guard<std::recursive_mutex> lg(other._lock);
// Check if empty / no listeners.
inline bool empty()
{
std::lock_guard<std::recursive_mutex> lock;
return listeners.empty();
}
// Remove all listeners.
inline void clear()
{
std::lock_guard<std::recursive_mutex> lock;
listeners.clear();
if (silence_cb) {
silence_cb();
}
_listeners.swap(other._listeners);
_cb_fill.swap(other._cb_fill);
_cb_clear.swap(other._cb_clear);
}
public /* operators */:
// Call Listeners with arguments.
/// Not valid without the extra template.
/* Copy Operator */
event<_args...>& operator=(const event<_args...>&) = delete;
/* Move Operator */
event<_args...>& operator=(event<_args...>&& other)
{
std::lock_guard<std::recursive_mutex> lg(_lock);
std::lock_guard<std::recursive_mutex> lgo(other._lock);
_listeners.swap(other._listeners);
_cb_fill.swap(other._cb_fill);
_cb_clear.swap(other._cb_clear);
return *this;
}
/** Call the event, going through all listeners in the order they were registered in.
*/
template<typename... _largs>
inline void operator()(_args... args)
{
std::lock_guard<std::recursive_mutex> lock;
for (auto& l : listeners) {
call<_largs...>(args...);
}
template<typename... _largs>
inline void call(_args... args)
{
std::lock_guard<std::recursive_mutex> lg(_lock);
for (auto& l : _listeners) {
l(args...);
}
}
// Convert to bool (true if not empty, false if empty).
inline operator bool()
{
return !this->empty();
}
public /* functions: listeners */:
// Add new listener.
/** Add a new listener to the event.
* @param listener A listener bound with std::bind or a std::function.
*/
inline void add(std::function<void(_args...)> listener)
{
std::lock_guard<std::recursive_mutex> lg(_lock);
if (_listeners.size() == 0) {
if (_cb_fill) {
_cb_fill();
}
}
_listeners.push_back(listener);
}
inline event<_args...>& operator+=(std::function<void(_args...)> listener)
{
this->add(listener);
return *this;
}
// Remove existing listener.
/** Remove an existing listener from the event.
* @param listener A listener bound with std::bind or a std::function.
*/
inline void remove(std::function<void(_args...)> listener)
{
std::lock_guard<std::recursive_mutex> lg(_lock);
_listeners.remove(listener);
if (_listeners.size() == 0) {
if (_cb_clear) {
_cb_clear();
}
}
}
inline event<_args...>& operator-=(std::function<void(_args...)> listener)
{
this->remove(listener);
return *this;
}
public /* events */:
/** Check if there are any listeners for the event.
* @return bool `true` if there are none, otherwise `false`.
*/
inline bool empty()
{
std::lock_guard<std::recursive_mutex> lg(_lock);
return _listeners.empty();
}
inline operator bool()
{
return !this->empty();
}
/** Clear the list of listeners for the event.
*/
inline void clear()
{
std::lock_guard<std::recursive_mutex> lg(_lock);
_listeners.clear();
if (_cb_clear) {
_cb_clear();
}
}
inline event<_args...>& operator=(nullptr_t)
{
clear();
return *this;
}
public /* callbacks */:
void set_listen_callback(std::function<void()> cb)
{
std::lock_guard<std::recursive_mutex> lock;
this->listen_cb = cb;
std::lock_guard<std::recursive_mutex> lg(_lock);
this->_cb_fill = cb;
}
void set_silence_callback(std::function<void()> cb)
{
std::lock_guard<std::recursive_mutex> lock;
this->silence_cb = cb;
std::lock_guard<std::recursive_mutex> lg(_lock);
this->_cb_clear = cb;
}
};
} // namespace util