9dbe170a69
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
68 lines
1.4 KiB
C++
68 lines
1.4 KiB
C++
/*
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* Copyright 2001-2007, Haiku.
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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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* Erik Jaesler (erik@cgsoftware.com)
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* Axel Dörfler, axeld@pinc-software.de
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*/
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#ifndef _TOKEN_SPACE_H
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#define _TOKEN_SPACE_H
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#include <BeBuild.h>
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#include <Locker.h>
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#include <SupportDefs.h>
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#include <map>
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#include <stack>
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// token types as specified in targets
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#define B_PREFERRED_TOKEN -2 /* A little bird told me about this one */
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#define B_NULL_TOKEN -1
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#define B_ANY_TOKEN 0
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// token types in the token list
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#define B_HANDLER_TOKEN 1
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#define B_SERVER_TOKEN 2
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namespace BPrivate {
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class BDirectMessageTarget;
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class BTokenSpace : public BLocker {
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public:
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BTokenSpace();
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~BTokenSpace();
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int32 NewToken(int16 type, void* object);
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void SetToken(int32 token, int16 type, void* object);
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bool RemoveToken(int32 token);
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bool CheckToken(int32 token, int16 type) const;
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status_t GetToken(int32 token, int16 type, void** _object) const;
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status_t SetHandlerTarget(int32 token, BDirectMessageTarget* target);
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status_t AcquireHandlerTarget(int32 token, BDirectMessageTarget** _target);
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private:
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struct token_info {
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int16 type;
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void* object;
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BDirectMessageTarget* target;
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};
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typedef std::map<int32, token_info> TokenMap;
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TokenMap fTokenMap;
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int32 fTokenCount;
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};
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extern _IMPEXP_BE BTokenSpace gDefaultTokens;
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} // namespace BPrivate
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#endif // _TOKEN_SPACE_H
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