1 files changed, 71 insertions, 0 deletions
diff --git a/src/libcamera/message.cpp b/src/libcamera/message.cpp
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--- /dev/null
+++ b/src/libcamera/message.cpp
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+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * message.cpp - Message queue support
+ */
+
+#include "message.h"
+
+#include "log.h"
+
+/**
+ * \file message.h
+ * \brief Message queue support
+ *
+ * The messaging API enables inter-thread communication through message
+ * posting. Messages can be sent from any thread to any recipient deriving from
+ * the Object class.
+ *
+ * To post a message, the sender allocates it dynamically as instance of a class
+ * derived from Message. It then posts the message to an Object recipient
+ * through Object::postMessage(). Message ownership is passed to the object,
+ * thus the message shall not store any temporary data.
+ *
+ * The message is delivered in the context of the object's thread, through the
+ * Object::message() virtual method. After delivery the message is
+ * automatically deleted.
+ */
+
+namespace libcamera {
+
+LOG_DEFINE_CATEGORY(Message)
+
+/**
+ * \class Message
+ * \brief A message that can be posted to a Thread
+ */
+
+/**
+ * \enum Message::Type
+ * \brief The message type
+ * \var Message::None
+ * \brief Invalid message type
+ */
+
+/**
+ * \brief Construct a message object of type \a type
+ * \param[in] type The message type
+ */
+Message::Message(Message::Type type)
+	: type_(type)
+{
+}
+
+Message::~Message()
+{
+}
+
+/**
+ * \fn Message::type()
+ * \brief Retrieve the message type
+ * \return The message type
+ */
+
+/**
+ * \fn Message::receiver()
+ * \brief Retrieve the message receiver
+ * \return The message receiver
+ */
+
+}; /* namespace libcamera */