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111 lines
2.9 KiB
C++
111 lines
2.9 KiB
C++
// -*- C++ -*-
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//=============================================================================
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/**
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* @file Thread_Exit.h
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*
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* $Id: Thread_Exit.h 80826 2008-03-04 14:51:23Z wotte $
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*
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* @author Carlos O'Ryan <coryan@uci.edu>
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*/
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//=============================================================================
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#ifndef ACE_THREAD_EXIT_H
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#define ACE_THREAD_EXIT_H
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#include /**/ "ace/pre.h"
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#include /**/ "ace/config-all.h"
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#if !defined (ACE_LACKS_PRAGMA_ONCE)
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# pragma once
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#endif /* ACE_LACKS_PRAGMA_ONCE */
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#include "ace/Thread_Control.h"
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ACE_BEGIN_VERSIONED_NAMESPACE_DECL
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/**
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* @class ACE_Thread_Exit
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*
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* @brief Keep exit information for a Thread in thread specific storage.
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* so that the thread-specific exit hooks will get called no
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* matter how the thread exits (e.g., via <ACE_Thread::exit>, C++
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* or Win32 exception, "falling off the end" of the thread entry
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* point function, etc.).
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*
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* This clever little helper class is stored in thread-specific
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* storage using the <ACE_TSS> wrapper. When a thread exits the
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* <ACE_TSS::cleanup> function deletes this object, thereby
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* closing it down gracefully.
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*/
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class ACE_Export ACE_Thread_Exit
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{
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public:
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/// Capture the Thread that will be cleaned up automatically.
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ACE_Thread_Exit (void);
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/// Set the ACE_Thread_Manager.
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void thr_mgr (ACE_Thread_Manager *tm);
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/// Destructor calls the thread-specific exit hooks when a thread
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/// exits.
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~ACE_Thread_Exit (void);
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/// Singleton access point.
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static ACE_Thread_Exit *instance (void);
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/// Cleanup method, used by the ACE_Object_Manager to destroy the
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/// singleton.
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static void cleanup (void *instance);
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private:
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/// Automatically add/remove the thread from the
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/// ACE_Thread_Manager.
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ACE_Thread_Control thread_control_;
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/**
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* Used to detect whether we should create a new instance (or not)
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* within the instance method -- we don't trust the instance_ ptr
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* because the destructor may have run (if ACE::fini() was called).
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* See bug #526.
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* We don't follow the singleton pattern due to dependency issues.
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*/
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static bool is_constructed_;
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};
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/**
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* @class ACE_Thread_Exit_Maybe
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*
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* @brief A version of ACE_Thread_Exit that is created dynamically
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* under the hood if the flag is set to TRUE.
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*
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* Allows the appearance of a "smart pointer", but is not
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* always created.
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*/
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class ACE_Export ACE_Thread_Exit_Maybe
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{
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public:
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/// Don't create an ACE_Thread_Exit instance by default.
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ACE_Thread_Exit_Maybe (int flag = 0);
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/// Destroys the underlying ACE_Thread_Exit instance if it exists.
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~ACE_Thread_Exit_Maybe (void);
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/// Delegates to underlying instance.
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ACE_Thread_Exit * operator -> (void) const;
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/// Returns the underlying instance.
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ACE_Thread_Exit * instance (void) const;
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private:
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/// Holds the underlying instance.
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ACE_Thread_Exit *instance_;
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};
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ACE_END_VERSIONED_NAMESPACE_DECL
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#include /**/ "ace/post.h"
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#endif /* ACE_THREAD_EXIT_H */
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