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Start refactoring the windowing system to use an event loop.

Browse source 
Userspace programs can now open /dev/gui_events and read a stream of GUI_Event
structs one at a time.

I was stuck on a stupid problem where we'd reenter Scheduler::yield() due to
having one of the has_data_available_for_reading() implementations using locks.
This commit is contained in:
Andreas Kling 2019-01-14 14:21:51 +01:00
parent b4da4e8fbd
commit b0e3f73375
46 changed files with 283 additions and 292 deletions
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4
Widgets/EventLoop.cpp
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@ -82,7 +82,7 @@ void EventLoop::waitForEvent()
bool prev_right_button = screen.right_mouse_button_pressed();
int dx = 0;
int dy = 0;
while (mouse.has_data_available_for_reading()) {
while (mouse.has_data_available_for_reading(*m_server_process)) {
signed_byte data[3];
ssize_t nread = mouse.read((byte*)data, 3);
ASSERT(nread == 3);
@ -90,7 +90,7 @@ void EventLoop::waitForEvent()
bool right_button = data[0] & 2;
dx += data[1];
dy += -data[2];
if (left_button != prev_left_button || right_button != prev_right_button || !mouse.has_data_available_for_reading()) {
if (left_button != prev_left_button || right_button != prev_right_button || !mouse.has_data_available_for_reading(*m_server_process)) {
prev_left_button = left_button;
prev_right_button = right_button;
screen.on_receive_mouse_data(dx, dy, left_button, right_button);