Laurent Pinchart
cc3ae13d9e
Allow signals to cross thread boundaries by posting them to the recipient through messages instead of calling the slot directly when the recipient lives in a different thread. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
52 lines
798 B
C++
52 lines
798 B
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2019, Google Inc.
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*
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* message.h - Message queue support
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*/
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#ifndef __LIBCAMERA_MESSAGE_H__
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#define __LIBCAMERA_MESSAGE_H__
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namespace libcamera {
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class Object;
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class SlotBase;
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class Thread;
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class Message
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{
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public:
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enum Type {
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None = 0,
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SignalMessage = 1,
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};
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Message(Type type);
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virtual ~Message();
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Type type() const { return type_; }
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Object *receiver() const { return receiver_; }
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private:
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friend class Thread;
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Type type_;
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Object *receiver_;
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};
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class SignalMessage : public Message
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{
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public:
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SignalMessage(SlotBase *slot, void *pack)
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: Message(Message::SignalMessage), slot_(slot), pack_(pack)
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{
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}
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SlotBase *slot_;
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void *pack_;
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};
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} /* namespace libcamera */
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#endif /* __LIBCAMERA_MESSAGE_H__ */
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