Minor changes to threading

- Renamed `cpp11_thread.cpp` to `thread.cpp`
- Removed features that are only supported by Win32 threads (`thread_wait` with timeout and mutex with spinlock)
- Fixed formatting in `thread.cpp`

src/thread.cpp

@@ -0,0 +1,127 @@
+#include <mutex>
+#include <thread>
+#include <condition_variable>
+
+#include <86box/plat.h>
+
+struct event_cpp11_t
+{
+    std::condition_variable cond;
+    std::mutex mutex;
+    bool state = false;
+};
+
+extern "C" {
+
+thread_t *
+thread_create(void (*thread_rout)(void *param), void *param)
+{
+    auto thread = new std::thread([thread_rout, param] {
+	thread_rout(param);
+    });
+    return thread;
+}
+
+int
+thread_wait(thread_t *arg)
+{
+    auto thread = reinterpret_cast<std::thread*>(arg);
+    thread->join();
+    return 0;
+}
+
+mutex_t *
+thread_create_mutex(void)
+{
+    auto mutex = new std::mutex;
+    return mutex;
+}
+
+int
+thread_wait_mutex(mutex_t *_mutex)
+{
+    if (_mutex == nullptr)
+	return 0;
+
+    auto mutex = reinterpret_cast<std::mutex*>(_mutex);
+    mutex->lock();
+    return 1;
+}
+
+
+int
+thread_release_mutex(mutex_t *_mutex)
+{
+    if (_mutex == nullptr)
+	return 0;
+
+    auto mutex = reinterpret_cast<std::mutex*>(_mutex);
+    mutex->unlock();
+    return 1;
+}
+
+
+void
+thread_close_mutex(mutex_t *_mutex)
+{
+    auto mutex = reinterpret_cast<std::mutex*>(_mutex);
+    delete mutex;
+}
+
+event_t *
+thread_create_event()
+{
+    auto ev = new event_cpp11_t;
+    return ev;
+}
+
+int
+thread_wait_event(event_t *handle, int timeout)
+{
+    auto event = reinterpret_cast<event_cpp11_t*>(handle);
+    auto lock = std::unique_lock<std::mutex>(event->mutex);
+
+    if (timeout < 0) {
+        event->cond.wait(lock, [event] { return event->state; });
+    } else {
+        auto to = std::chrono::system_clock::now() + std::chrono::milliseconds(timeout);
+        std::cv_status status;
+
+        do {
+            status = event->cond.wait_until(lock, to);
+        } while ((status != std::cv_status::timeout) && !event->state);
+
+        if (status == std::cv_status::timeout) {
+            return 1;
+        }
+    }
+    return 0;
+}
+
+void
+thread_set_event(event_t *handle)
+{
+    auto event = reinterpret_cast<event_cpp11_t*>(handle);
+    {
+        auto lock = std::unique_lock<std::mutex>(event->mutex);
+        event->state = true;
+    }
+    event->cond.notify_all();
+}
+
+void
+thread_reset_event(event_t *handle)
+{
+    auto event = reinterpret_cast<event_cpp11_t*>(handle);
+    auto lock = std::unique_lock<std::mutex>(event->mutex);
+    event->state = false;
+}
+
+void
+thread_destroy_event(event_t *handle)
+{
+    auto event = reinterpret_cast<event_cpp11_t*>(handle);
+    delete event;
+}
+
+}