5 files changed, 136 insertions, 1 deletions
diff --git a/include/libcamera/internal/event_dispatcher.h b/include/libcamera/internal/event_dispatcher.h
new file mode 100644
index 00000000..cb06bf20
--- /dev/null
+++ b/include/libcamera/internal/event_dispatcher.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * event_dispatcher.h - Event dispatcher
+ */
+#ifndef __LIBCAMERA_EVENT_DISPATCHER_H__
+#define __LIBCAMERA_EVENT_DISPATCHER_H__
+
+#include <vector>
+
+namespace libcamera {
+
+class EventNotifier;
+class Timer;
+
+class EventDispatcher
+{
+public:
+	virtual ~EventDispatcher();
+
+	virtual void registerEventNotifier(EventNotifier *notifier) = 0;
+	virtual void unregisterEventNotifier(EventNotifier *notifier) = 0;
+
+	virtual void registerTimer(Timer *timer) = 0;
+	virtual void unregisterTimer(Timer *timer) = 0;
+
+	virtual void processEvents() = 0;
+
+	virtual void interrupt() = 0;
+};
+
+} /* namespace libcamera */
+
+#endif /* __LIBCAMERA_EVENT_DISPATCHER_H__ */
diff --git a/include/libcamera/internal/event_dispatcher_poll.h b/include/libcamera/internal/event_dispatcher_poll.h
index 39d9be52..33de051d 100644
--- a/include/libcamera/internal/event_dispatcher_poll.h
+++ b/include/libcamera/internal/event_dispatcher_poll.h
@@ -11,7 +11,7 @@
 #include <map>
 #include <vector>
 
-#include <libcamera/event_dispatcher.h>
+#include "libcamera/internal/event_dispatcher.h"
 
 struct pollfd;
 
diff --git a/include/libcamera/internal/event_notifier.h b/include/libcamera/internal/event_notifier.h
new file mode 100644
index 00000000..a37b02ee
--- /dev/null
+++ b/include/libcamera/internal/event_notifier.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * event_notifier.h - File descriptor event notifier
+ */
+#ifndef __LIBCAMERA_EVENT_NOTIFIER_H__
+#define __LIBCAMERA_EVENT_NOTIFIER_H__
+
+#include <libcamera/object.h>
+#include <libcamera/signal.h>
+
+namespace libcamera {
+
+class Message;
+
+class EventNotifier : public Object
+{
+public:
+	enum Type {
+		Read,
+		Write,
+		Exception,
+	};
+
+	EventNotifier(int fd, Type type, Object *parent = nullptr);
+	virtual ~EventNotifier();
+
+	Type type() const { return type_; }
+	int fd() const { return fd_; }
+
+	bool enabled() const { return enabled_; }
+	void setEnabled(bool enable);
+
+	Signal<EventNotifier *> activated;
+
+protected:
+	void message(Message *msg) override;
+
+private:
+	int fd_;
+	Type type_;
+	bool enabled_;
+};
+
+} /* namespace libcamera */
+
+#endif /* __LIBCAMERA_EVENT_NOTIFIER_H__ */
diff --git a/include/libcamera/internal/meson.build b/include/libcamera/internal/meson.build
index 6500fe2a..7cde023f 100644
--- a/include/libcamera/internal/meson.build
+++ b/include/libcamera/internal/meson.build
@@ -18,7 +18,9 @@ libcamera_internal_headers = files([
     'device_enumerator.h',
     'device_enumerator_sysfs.h',
     'device_enumerator_udev.h',
+    'event_dispatcher.h',
     'event_dispatcher_poll.h',
+    'event_notifier.h',
     'file.h',
     'formats.h',
     'ipa_context_wrapper.h',
@@ -36,6 +38,7 @@ libcamera_internal_headers = files([
     'semaphore.h',
     'sysfs.h',
     'thread.h',
+    'timer.h',
     'utils.h',
     'v4l2_controls.h',
     'v4l2_device.h',
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__ */