glibmm
2.32.0
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Signal class for inter-thread communication. More...
#include <glibmm/dispatcher.h>
Public Member Functions | |
Dispatcher () | |
Create new Dispatcher instance using the default main context. | |
Dispatcher (const Glib::RefPtr< MainContext >& context) | |
Create new Dispatcher instance using an arbitrary main context. | |
~Dispatcher () | |
void | emit () |
void | operator() () |
sigc::connection | connect (const sigc::slot< void >& slot) |
Signal class for inter-thread communication.
Glib::Dispatcher works similar to sigc::signal<void>. But unlike normal signals, the notification happens asynchronously through a pipe. This is a simple and efficient way of communicating between threads, and especially useful in a thread model with a single GUI thread.
No mutex locking is involved, apart from the operating system's internal I/O locking. That implies some usage rules:
Notes about performance:
write()
system call. Using Glib::Dispatcher on Windows:
Glib::Dispatcher also works on win32-based systems. Unfortunately though, the implementation cannot use a pipe on win32 and therefore does have to lock a mutex on emission, too. However, the impact on performance is likely minor and the notification still happens asynchronously. Apart from the additional lock the behavior matches the Unix implementation.
Create new Dispatcher instance using the default main context.
Glib::FileError |
Glib::Dispatcher::Dispatcher | ( | const Glib::RefPtr< MainContext >& | context | ) | [explicit] |
Create new Dispatcher instance using an arbitrary main context.
Glib::FileError |
sigc::connection Glib::Dispatcher::connect | ( | const sigc::slot< void > & | slot | ) |
void Glib::Dispatcher::emit | ( | ) |
void Glib::Dispatcher::operator() | ( | ) |