Class: Event::Backend::KQueue

Inherits:
Object
  • Object
show all
Defined in:
ext/event/backend/kqueue.c

Instance Method Summary collapse

Constructor Details

#initialize(loop) ⇒ Object 



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# File 'ext/event/backend/kqueue.c', line 82

VALUE Event_Backend_KQueue_initialize(VALUE self, VALUE loop) {
	struct Event_Backend_KQueue *data = NULL;
	TypedData_Get_Struct(self, struct Event_Backend_KQueue, &Event_Backend_KQueue_Type, data);
	
	data->loop = loop;
	int result = kqueue();
	
	if (result == -1) {
		rb_sys_fail("kqueue");
	} else {
		ioctl(result, FIOCLEX);
		data->descriptor = result;
		
		rb_update_max_fd(data->descriptor);
	}
	
	return self;
}

Instance Method Details

#io_wait(fiber, io, events) ⇒ Object 



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# File 'ext/event/backend/kqueue.c', line 101

VALUE Event_Backend_KQueue_io_wait(VALUE self, VALUE fiber, VALUE io, VALUE events) {
	struct Event_Backend_KQueue *data = NULL;
	TypedData_Get_Struct(self, struct Event_Backend_KQueue, &Event_Backend_KQueue_Type, data);
	
	struct kevent event;
	u_short flags = 0;
	
	int descriptor = NUM2INT(rb_funcall(io, id_fileno, 0));
	
	int mask = NUM2INT(events);
	
	if (mask & READABLE) {
		flags |= EVFILT_READ;
	}
	
	if (mask & PRIORITY) {
		flags |= EV_OOBAND;
	}
	
	if (mask & WRITABLE) {
		flags |= EVFILT_WRITE;
	}

	EV_SET(&event, descriptor, flags, EV_ADD|EV_ENABLE|EV_ONESHOT, 0, 0, (void*)fiber);
	
	// A better approach is to batch all changes:
	int result = kevent(data->descriptor, &event, 1, NULL, 0, NULL);
	
	if (result == -1) {
		rb_sys_fail("kevent");
	}
	
	rb_funcall(data->loop, id_transfer, 0);
	
	return Qnil;
}

#select(duration) ⇒ Object 



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# File 'ext/event/backend/kqueue.c', line 164

VALUE Event_Backend_KQueue_select(VALUE self, VALUE duration) {
	struct Event_Backend_KQueue *data = NULL;
	TypedData_Get_Struct(self, struct Event_Backend_KQueue, &Event_Backend_KQueue_Type, data);
	
	struct kevent events[KQUEUE_MAX_EVENTS];
	struct timespec storage;
	
	int count = kevent(data->descriptor, NULL, 0, events, KQUEUE_MAX_EVENTS, make_timeout(duration, &storage));
	
	if (count == -1) {
		rb_sys_fail("kevent");
	}
	
	for (int i = 0; i < count; i += 1) {
		VALUE fiber = (VALUE)events[i].udata;
		rb_funcall(fiber, id_transfer, 0);
	}
	
	return INT2NUM(count);
}