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LibCore: Add 'notify_forked()' to tear down the eventloop in forked child

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This makes the forked process capable of constructing a new event loop,
should it choose to.
This commit is contained in:
AnotherTest 2020-09-07 22:44:42 +04:30 • committed by Andreas Kling
parent aa2df9277d
commit c3dbe77024
2 changed files with 28 additions and 1 deletions
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20
Libraries/LibCore/EventLoop.cpp
View file

@ -519,6 +519,26 @@ void EventLoop::unregister_signal(int handler_id)
s_signal_handlers.remove(remove_signo);
}
void EventLoop::notify_forked(ForkEvent event)
{
switch (event) {
case ForkEvent::Child:
s_main_event_loop = nullptr;
s_event_loop_stack->clear();
s_timers->clear();
s_notifiers->clear();
s_signal_handlers.clear();
s_handling_signal = 0;
s_next_signal_id = 0;
s_pid = 0;
s_rpc_server = nullptr;
s_rpc_clients.clear();
return;
}
ASSERT_NOT_REACHED();
}
void EventLoop::wait_for_event(WaitMode mode)
{
fd_set rfds;

9
Libraries/LibCore/EventLoop.h
View file

@ -81,6 +81,13 @@ public:
static int register_signal(int signo, Function<void(int)> handler);
static void unregister_signal(int handler_id);
// Note: Boost uses Parent/Child/Prepare, but we don't really have anything
// interesting to do in the parent or before forking.
enum class ForkEvent {
Child,
};
static void notify_forked(ForkEvent);
private:
bool start_rpc_server();
void wait_for_event(WaitMode);
@ -102,8 +109,8 @@ private:
class SignalHandlers {
AK_MAKE_NONCOPYABLE(SignalHandlers);
public:
public:
SignalHandlers(SignalHandlers&& from)
: m_signo(from.m_signo)
, m_original_handler(from.m_original_handler)