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with PostMessage() in case the message queue is full. Some notes: * for synchronous replies, we don't use this mechanism yet, but it could be extended to do that as well. * the code looks so complicated because we need a way to access the looper's queue without locking it (to prevent deadlocks); like Dano's solution, I've abused BTokenSpace to store a BDirectMessageTarget with a BHandler. * we also need to decouple the lifetime of a looper's queue from its target, as we cannot lock the looper, and therefore, can't guarantee it stays valid as long as we're accessing it outside of BLooper. * init_clipboard() now needs to be done after the global constructors have been called - since sending messages now needs gDefaultTokens to be initialized. Since this is done per image, it shouldn't cause any troubles, though. * some minor cleanup, removed unused _msg_cache_cleanup_() and friends. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19968 a95241bf-73f2-0310-859d-f6bbb57e9c96
39 lines
637 B
C++
39 lines
637 B
C++
/*
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* Copyright 2007, Haiku, Inc.
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* Distributed under the terms of the MIT License.
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*
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* Authors:
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* Axel Dörfler, axeld@pinc-software.de
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*/
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#ifndef _DIRECT_MESSAGE_TARGET_H
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#define _DIRECT_MESSAGE_TARGET_H
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#include <MessageQueue.h>
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namespace BPrivate {
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class BDirectMessageTarget {
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public:
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BDirectMessageTarget();
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~BDirectMessageTarget();
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bool AddMessage(BMessage* message);
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void Close();
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void Acquire();
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void Release();
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BMessageQueue* Queue() { return &fQueue; }
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private:
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int32 fReferenceCount;
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BMessageQueue fQueue;
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bool fClosed;
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};
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} // namespace BPrivate
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#endif // _DIRECT_MESSAGE_TARGET_H
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