libcamera: Move EventDispatcher to internal API

There's no user of the EventDispatcher (and the related EventNotifier
and Timer classes) outside of libcamera. Move those classes to the
internal API.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>

1 files changed, 49 insertions, 0 deletions

diff --git a/include/libcamera/internal/timer.h b/include/libcamera/internal/timer.h
new file mode 100644
index 00000000..f55fe3c0
--- /dev/null
+++ b/include/libcamera/internal/timer.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * timer.h - Generic timer
+ */
+#ifndef __LIBCAMERA_TIMER_H__
+#define __LIBCAMERA_TIMER_H__
+
+#include <chrono>
+#include <stdint.h>
+
+#include <libcamera/object.h>
+#include <libcamera/signal.h>
+
+namespace libcamera {
+
+class Message;
+
+class Timer : public Object
+{
+public:
+	Timer(Object *parent = nullptr);
+	~Timer();
+
+	void start(unsigned int msec) { start(std::chrono::milliseconds(msec)); }
+	void start(std::chrono::milliseconds duration);
+	void start(std::chrono::steady_clock::time_point deadline);
+	void stop();
+	bool isRunning() const;
+
+	std::chrono::steady_clock::time_point deadline() const { return deadline_; }
+
+	Signal<Timer *> timeout;
+
+protected:
+	void message(Message *msg) override;
+
+private:
+	void registerTimer();
+	void unregisterTimer();
+
+	bool running_;
+	std::chrono::steady_clock::time_point deadline_;
+};
+
+} /* namespace libcamera */
+
+#endif /* __LIBCAMERA_TIMER_H__ */