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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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3
Kernel/Process.cpp
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@ -18,6 +18,7 @@
#include "Scheduler.h"
#include "FIFO.h"
#include "KSyms.h"
#include <Widgets/Window.h>
//#define DEBUG_IO
//#define TASK_DEBUG
@ -1057,7 +1058,7 @@ ssize_t Process::sys$read(int fd, void* outbuf, size_t nread)
if (!descriptor)
return -EBADF;
if (descriptor->is_blocking()) {
if (!descriptor->has_data_available_for_reading()) {
if (!descriptor->has_data_available_for_reading(*this)) {
m_blocked_fd = fd;
block(BlockedRead);
sched_yield();