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add application event loop "wake-up"

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hippoz 2022-11-10 20:17:37 +02:00
parent e76e2b43a1
commit 3fa1647fc9
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GPG key ID: 7C52899193467641
2 changed files with 45 additions and 4 deletions
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40
src/Application.cpp
View file

@ -1,14 +1,37 @@
#include "Application.hpp"
#include <poll.h>
#include <unistd.h>
namespace Raven {
bool Application::wake() {
if (!m_wakeup_pipe_available) {
return false;
}
uint32_t buf = 0;
write(m_wakeup_pipe_write_end, &buf, 1);
return true;
}
void Application::add_window(std::shared_ptr<Window> window) {
m_windows.push_back(window);
update_fds();
}
void Application::update_fds() {
if (m_should_create_wakeup_pipe) {
m_should_create_wakeup_pipe = false;
int pipe_fds[2];
if (pipe(pipe_fds) != 0) {
// TODO: handle this?
return;
}
m_wakeup_pipe_read_end = pipe_fds[0];
m_wakeup_pipe_write_end = pipe_fds[1];
m_wakeup_pipe_available = true;
}
for (int i = 0; i < RAVEN_APPLICATION_MAX_WINDOWS; i++) {
m_fds[i].fd = -1;
m_fds[i].events = 0;
@ -18,6 +41,12 @@ void Application::update_fds() {
m_fds[i].fd = m_windows[i]->file_descriptor();
m_fds[i].events = POLL_IN;
}
if (m_wakeup_pipe_available) {
int wakeup_pipe_index = m_windows.size();
m_fds[wakeup_pipe_index].fd = m_wakeup_pipe_read_end;
m_fds[wakeup_pipe_index].events = POLL_IN;
m_fds[wakeup_pipe_index].revents = 0;
}
}
int Application::turn() {
@ -25,11 +54,14 @@ int Application::turn() {
update_fds();
m_fds_need_update = false;
}
if (poll(m_fds, m_windows.size(), -1) > 0) {
if (poll(m_fds, m_windows.size() + 1, -1) > 0) {
for (size_t i = 0; i < m_windows.size(); i++) {
if (m_fds[i].revents & POLLIN) {
m_windows[i]->run(false);
}
m_windows[i]->run(false);
}
while (!m_microtasks.empty()) {
auto callback = m_microtasks.front();
callback();
m_microtasks.pop();
}
} else {
return 1;

9
src/Application.hpp
View file

@ -12,8 +12,12 @@ namespace Raven {
class Application {
public:
Application() {}
Application(bool should_create_wakeup_pipe)
: m_should_create_wakeup_pipe(should_create_wakeup_pipe) {}
void add_window(std::shared_ptr<Window>);
bool wake();
void queue_microtask(std::function<void()> callback) { m_microtasks.push(callback); }
int turn();
int run();
@ -29,6 +33,11 @@ private:
std::vector<std::shared_ptr<Window>> m_windows;
struct pollfd m_fds[RAVEN_APPLICATION_MAX_WINDOWS];
bool m_fds_need_update { true };
bool m_should_create_wakeup_pipe { false };
bool m_wakeup_pipe_available { false };
int m_wakeup_pipe_read_end { -1 };
int m_wakeup_pipe_write_end { -1 };
std::queue<std::function<void()>> m_microtasks;
};
}