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-/* -*- C++ -*- */
-
-//=============================================================================
-/**
- * @file Object_Manager.h
- *
- * $Id$
- *
- * @author David L. Levine <levine@cs.wustl.edu>
- * @author Matthias Kerkhoff
- * @author Per Andersson
- */
-//=============================================================================
-
-#ifndef ACE_OBJECT_MANAGER_H
-#define ACE_OBJECT_MANAGER_H
-#include /**/ "ace/pre.h"
-
-#include "ace/ACE_export.h"
-#include "ace/Object_Manager_Base.h"
-#include "ace/Global_Macros.h"
-
-#if !defined (ACE_LACKS_PRAGMA_ONCE)
-# pragma once
-#endif /* ACE_LACKS_PRAGMA_ONCE */
-
-ACE_BEGIN_VERSIONED_NAMESPACE_DECL
-
-// Forward declarations.
-class ACE_Object_Manager_Preallocations;
-class ACE_Sig_Adapter;
-class ACE_Sig_Set;
-
-ACE_END_VERSIONED_NAMESPACE_DECL
-
-#if defined (ACE_MT_SAFE) && (ACE_MT_SAFE != 0)
-
-ACE_BEGIN_VERSIONED_NAMESPACE_DECL
-
- class ACE_Mutex;
- class ACE_Null_Mutex;
- class ACE_Thread_Mutex;
- class ACE_Recursive_Thread_Mutex;
- class ACE_RW_Thread_Mutex;
-
-ACE_END_VERSIONED_NAMESPACE_DECL
-
-# include "ace/Recursive_Thread_Mutex.h"
-#endif /* ACE_MT_SAFE */
-
-ACE_BEGIN_VERSIONED_NAMESPACE_DECL
-
-// only used by ACE_OS_Object_Manager::ctor
-# if defined (ACE_WIN32)
-// Default WIN32 structured exception handler.
-int ACE_SEH_Default_Exception_Selector (void *);
-int ACE_SEH_Default_Exception_Handler (void *);
-# endif /* ACE_WIN32 */
-
-class ACE_Cleanup_Info_Node;
-template <class T> class ACE_Cleanup_Adapter;
-
-// Configuration parameters.
-#if !defined (ACE_MAX_MANAGED_OBJECTS)
-# define ACE_MAX_MANAGED_OBJECTS 128
-#endif /* ! ACE_MAX_MANAGED_OBJECTS */
-
-#if !defined (ACE_APPLICATION_PREALLOCATED_OBJECT_DECLARATIONS)
-# define ACE_APPLICATION_PREALLOCATED_OBJECT_DECLARATIONS
-#endif /* ! ACE_APPLICATION_PREALLOCATED_OBJECT_DECLARATIONS */
-
-#if !defined (ACE_APPLICATION_PREALLOCATED_ARRAY_DECLARATIONS)
-# define ACE_APPLICATION_PREALLOCATED_ARRAY_DECLARATIONS
-#endif /* ! ACE_APPLICATION_PREALLOCATED_ARRAY_DECLARATIONS */
-
-/**
- * @class ACE_Object_Manager
- *
- * @brief Manager for ACE library services and singleton cleanup.
- *
- * The <ACE_Object_Manager> manages cleanup of objects, typically
- * singletons, at program termination. In addition to managing
- * the cleanup of the ACE library, it provides an interface for
- * application to register objects to be cleaned up.
- * This class also shuts down ACE library services, so that they
- * can reclaim their storage, at program termination. It works
- * by creating a static instance whose destructor gets called
- * along with those of all other static objects. Hooks are
- * provided for application code to register objects and arrays
- * for cleanup, e.g., destruction. The order of such cleanup
- * calls is in the reverse order of registration, i.e., that
- * last object/array to register gets cleaned up first.
- * The <ACE_Object_Manager> API includes <ACE_Managed_Object>. That
- * class is contained in a separate file because it is a
- * template class, and some compilers require that template and
- * non-template class definitions appear in separate files.
- * Please see ace/Managed_Object.h for a description of that
- * part of the API. In summary, <ACE_Managed_Object> provides two
- * adapters, the <ACE_Cleanup_Adapter> and <ACE_Managed_Object>
- * template classes for adapting objects of any type to be
- * easily managed by the <ACE_Object_Manager>. There are several
- * mechanisms for adapting objects and arrays for cleanup at
- * program termination, in roughly increasing order of ease-of-use:
- * 1) Derive the object's class from <ACE_Cleanup>.
- * 2) Allow the <ACE_Object_Manager> to both dynamically allocate
- * and deallocate the object.
- * 3) Provide an <ACE_CLEANUP_FUNC> cleanup hook for the object or
- * array.
- * 4) Allow the <ACE_Object_Manager> to both preallocate the object
- * or array, either statically in global data or dynamically on
- * the heap, when its singleton instance is construction.
- *
- * There are also several mechanisms for registering objects and
- * arrays for cleanup. In decreasing order of flexibility and
- * complexity (with the exception of the last mechanism):
- *
- * 1) ACE_Object_Manager::at_exit (void *object,
- * ACE_CLEANUP_FUNC cleanup_hook,
- * void *param);
- * can be used to register any object or array for any
- * cleanup activity at program termination.
- * 2) ACE_Object_Manager::at_exit (ACE_Cleanup *object,
- * void *param = 0);
- * can be used to register an <ACE_Cleanup> object
- * for any cleanup activity at program termination.
- * The final mechanism is not general purpose, but can only
- * be used to allocate objects and arrays at program startup:
- * 3) ACE_Managed_Object::get_preallocated_object
- * (ACE_Object_Manager::Preallocated_Object id);
- * and
- * ACE_Managed_Object::get_preallocated_array
- * (ACE_Object_Manager::Preallocated_Array id);
- * can only be used to allocate objects at program startup,
- * either in global data or on the heap (selected at compile
- * time). These are intended to replace static locks, etc.
- * Instead of creating a static <ACE_Object_Manager> instance, one
- * can alternatively be created on the stack of the main program
- * thread. It is created just after entry to ::main (int, char
- * *[]), and before any existing code in that function is
- * executed. To enable this alternative, add #define
- * ACE_HAS_NONSTATIC_OBJECT_MANAGER before including the platform
- * specific config-* file in ace/config.h prior to
- * building the ACE library and your applications. This #define
- * is enabled in some config files that are supplied with ACE.
- *
- * To ensure a static object manager is used, #undef
- * ACE_HAS_NONSTATIC_OBJECT_MANAGER *after* including the platform
- * specific config-* file.
- * Note that the ACE_Object_Manager _must_ be created before
- * any threads are spawned by the program.
- * If ACE_HAS_NONSTATIC_OBJECT_MANAGER is not #defined, the ACE
- * library creates a static, singleton <ACE_Object_Manager> instance.
- * The instance is placed in global program data, and constructed
- * via a static object constructor. If ACE_HAS_NONSTATIC_OBJECT_MANAGER
- * is #defined, the <ACE_Object_Manager> instance is created on the stack
- * of the main program thread, as noted above.
- *
- * With ACE_HAS_NONSTATIC_OBJECT_MANAGER enabled, the ACE
- * library has no static objects that require destruction.
- * However, there are two drawbacks to using it:
- * 1) main (int, char *[]) must be declared with arguments, even
- * if they're not used. All of ACE is converted to this, so
- * just applications have to be concerned with it.
- * 2) If there any static objects that depend on those that are
- * cleaned up by the Object_Manager, they'll get cleaned up too
- * late. The ACE tests do not violate this requirement.
- * However, applications may have trouble with it.
- * NOTE on the use of <::exit> -- <::exit> does not destroy
- * automatic objects. Therefore, if
- * ACE_HAS_NONSTATIC_OBJECT_MANAGER is enabled, the
- * <ACE_Object_Manager> instance will *not* be destroyed if
- * <::exit> is called! However, <ACE_OS::exit> will properly
- * destroy the ACE_Object_Manager. It is highly recommended
- * that <ACE_OS::exit> be used instead of <::exit>.
- *
- * However, <::exit> and <ACE_OS::exit> are tricky to use
- * properly, especially in multithread programs. It is much
- * safer to throw an exception (or simulate that effect) that
- * will be caught by <main> instead of calling exit. Then,
- * <main> can perform any necessary application-specific cleanup
- * and return the status value. In addition, it's usually best
- * to avoid calling <::exit> and <ACE_OS::exit> from threads
- * other than the main thread. Thanks to Jeff Greif
- * <jmg@trivida.com> for pointing out that <::exit> doesn't
- * destroy automatic objects, and for developing the
- * recommendations in this paragraph.
- *
- * Instead of creating a static <ACE_Object_Manager>, or letting
- * ACE create it on the stack of <main> for you, another
- * alternative is to #define
- * ACE_DOESNT_INSTANTIATE_NONSTATIC_OBJECT_MANAGER. With that
- * #define, the application must create the ACE_Object_Manager.
- * The recommended way is to call <ACE::init> at the start of
- * the program, and call <ACE::fini> at the end. Alternatively,
- * the application could explicity construct an
- * <ACE_Object_Manager>.
- */
-class ACE_Export ACE_Object_Manager : public ACE_Object_Manager_Base
-{
-
-public:
- /**
- * Explicitly initialize (construct the singleton instance of) the
- * ACE_Object_Manager. Returns 0 on success, -1 on failure, and 1
- * if it had already been called.
- */
- virtual int init (void);
-
- /**
- * Explicitly destroy the singleton instance of the
- * ACE_Object_Manager. Returns 0 on success, -1 on failure, and 1
- * if it had already been called.
- */
- virtual int fini (void);
-
- /**
- * Returns 1 before the ACE_Object_Manager has been constructed.
- * This flag can be used to determine if the program is constructing
- * static objects. If no static object spawns any threads, the
- * program will be single-threaded when this flag returns 1. (Note
- * that the program still might construct some static objects when
- * this flag returns 0, if ACE_HAS_NONSTATIC_OBJECT_MANAGER is not
- * defined.)
- */
- static int starting_up (void);
-
- /**
- * Returns 1 after the ACE_Object_Manager has been destroyed. This
- * flag can be used to determine if the program is in the midst of
- * destroying static objects. (Note that the program might destroy
- * some static objects before this flag can return 1, if
- * ACE_HAS_NONSTATIC_OBJECT_MANAGER is not defined.)
- */
- static int shutting_down (void);
-
- /**
- * Register an ACE_Cleanup object for cleanup at process
- * termination. The object is deleted via the
- * <ace_cleanup_destroyer>. If you need more flexiblity, see the
- * <other at_exit> method below. For OS's that do not have
- * processes, cleanup takes place at the end of <main>. Returns 0
- * on success. On failure, returns -1 and sets errno to: EAGAIN if
- * shutting down, ENOMEM if insufficient virtual memory, or EEXIST
- * if the object (or array) had already been registered.
- */
- static int at_exit (ACE_Cleanup *object, void *param = 0);
-
- /**
- * Register an object (or array) for cleanup at process termination.
- * "cleanup_hook" points to a (global, or static member) function
- * that is called for the object or array when it to be destroyed.
- * It may perform any necessary cleanup specific for that object or
- * its class. "param" is passed as the second parameter to the
- * "cleanup_hook" function; the first parameter is the object (or
- * array) to be destroyed. "cleanup_hook", for example, may delete
- * the object (or array). For OS's that do not have processes, this
- * function is the same as <at_thread_exit>. Returns 0 on success.
- * On failure, returns -1 and sets errno to: EAGAIN if shutting
- * down, ENOMEM if insufficient virtual memory, or EEXIST if the
- * object (or array) had already been registered.
- */
- static int at_exit (void *object,
- ACE_CLEANUP_FUNC cleanup_hook,
- void *param);
-
-#if 0 /* not implemented yet */
- /// Similar to <at_exit>, except that the cleanup_hook is called
- /// when the current thread exits instead of when the program terminates.
- static int at_thread_exit (void *object,
- ACE_CLEANUP_FUNC cleanup_hook,
- void *param);
-#endif /* 0 */
-
- /// Unique identifiers for preallocated objects. Please see
- /// ace/Managed_Object.h for information on accessing preallocated
- /// objects.
- enum Preallocated_Object
- {
- ACE_FILECACHE_LOCK,
-#if defined (ACE_HAS_THREADS)
- ACE_STATIC_OBJECT_LOCK,
-#endif /* ACE_HAS_THREADS */
-#if defined (ACE_MT_SAFE) && (ACE_MT_SAFE != 0)
- ACE_MT_CORBA_HANDLER_LOCK,
- ACE_DUMP_LOCK,
- ACE_SIG_HANDLER_LOCK,
- ACE_SINGLETON_NULL_LOCK,
- ACE_SINGLETON_RECURSIVE_THREAD_LOCK,
- ACE_THREAD_EXIT_LOCK,
-#if !defined (ACE_LACKS_ACE_TOKEN)
- ACE_TOKEN_MANAGER_CREATION_LOCK,
- ACE_TOKEN_INVARIANTS_CREATION_LOCK,
-#endif /* ! ACE_LACKS_ACE_TOKEN */
- ACE_PROACTOR_EVENT_LOOP_LOCK,
-#endif /* ACE_MT_SAFE */
-
- // Hook for preallocated objects provided by application.
- ACE_APPLICATION_PREALLOCATED_OBJECT_DECLARATIONS
-
- ACE_PREALLOCATED_OBJECTS // This enum value must be last!
- };
-
- /// Unique identifiers for preallocated arrays. Please see
- /// ace/Managed_Object.h for information on accessing preallocated
- /// arrays.
- enum Preallocated_Array
- {
- /// There currently are no preallocated arrays in the ACE
- /// library. If the application doesn't have any, make sure
- /// the the preallocated_array size is at least one by declaring
- /// this dummy . . .
- ACE_EMPTY_PREALLOCATED_ARRAY,
-
- /// Hook for preallocated arrays provided by application.
- ACE_APPLICATION_PREALLOCATED_ARRAY_DECLARATIONS
-
- ACE_PREALLOCATED_ARRAYS // This enum value must be last!
- };
-
- /**
- * @deprecated Accesses a default signal set used, for example,
- * in ACE_Sig_Guard methods.
- * Deprecated: use ACE_Object_Manager::default_mask () instead.
- */
- static ACE_Sig_Set &default_mask (void);
-
-private:
- /// For at_exit support.
- ACE_OS_Exit_Info exit_info_;
-
-#if !defined (ACE_LACKS_ACE_SVCCONF)
- /// Preallocated objects collection.
- ACE_Object_Manager_Preallocations *preallocations_;
-
- /// ACE_Service_Config signal handler.
- ACE_Sig_Adapter *ace_service_config_sig_handler_;
-#endif /* ! ACE_LACKS_ACE_SVCCONF */
-
- /// Register an object or array for deletion at program termination.
- /// See description of static version above for return values.
- int at_exit_i (void *object, ACE_CLEANUP_FUNC cleanup_hook, void *param);
-
-#if defined (ACE_MT_SAFE) && (ACE_MT_SAFE != 0)
-public:
- // = The <get_singleton_lock> accessors are for internal
- // use by ACE_Singleton _only_.
-
- /**
- * Accesses an ACE_Null_Mutex to be used for construction of
- * <ACE_Singletons>. Returns 0, and the lock in the argument, on
- * success; returns -1 on failure.
- */
- static int get_singleton_lock (ACE_Null_Mutex *&);
-
- /**
- * Accesses a non-recursive <ACE_Thread_Mutex> to be used for
- * construction of <ACE_Singletons>. Returns 0, and the lock in the
- * argument, on success; returns -1 on failure.
- */
- static int get_singleton_lock (ACE_Thread_Mutex *&);
-
- /**
- * Accesses a non-recursive <ACE_Mutex> to be used for construction
- * of <ACE_Singletons>. Returns 0, and the lock in the argument, on
- * success; returns -1 on failure.
- */
- static int get_singleton_lock (ACE_Mutex *&);
-
- /**
- * Accesses a recursive ACE_Recursive_Thread_Mutex to be used for
- * construction of <ACE_Singletons>. Returns 0, and the lock in the
- * argument, on success; returns -1 on failure.
- */
- static int get_singleton_lock (ACE_Recursive_Thread_Mutex *&);
-
- /**
- * Accesses a readers/writer <ACE_RW_Thread_Mutex> to be used for
- * construction of <ACE_Singletons>. Returns 0, and the lock in the
- * argument, on success; returns -1 on failure.
- */
- static int get_singleton_lock (ACE_RW_Thread_Mutex *&);
-#endif /* ACE_MT_SAFE */
-
-public:
- // For internal use only by ACE_Managed_Objects.
-
- /**
- * Accessor to singleton instance. Because static member functions
- * are provided in the interface, this should not be public. However,
- * it is public so that ACE_Managed_Object<TYPE> can access it.
- */
- static ACE_Object_Manager *instance (void);
-
- /// Table of preallocated objects.
- static void *preallocated_object[ACE_PREALLOCATED_OBJECTS];
-
- /// Table of preallocated arrays.
- static void *preallocated_array[ACE_PREALLOCATED_ARRAYS];
-
-public:
- // Application code should not use these explicitly, so they're
- // hidden here. They're public so that the ACE_Object_Manager can
- // be constructed/destructed in <main> with
- // ACE_HAS_NONSTATIC_OBJECT_MANAGER.
- ACE_Object_Manager (void);
- ~ACE_Object_Manager (void);
-
-private:
- /// Singleton pointer.
- static ACE_Object_Manager *instance_;
-
-#if defined (ACE_MT_SAFE) && (ACE_MT_SAFE != 0)
- /// Lock that is used to guard internal structures.
- ACE_Recursive_Thread_Mutex *internal_lock_;
-
- /// Null lock for guarding singleton creation.
- ACE_Cleanup_Adapter<ACE_Null_Mutex> *singleton_null_lock_;
-
- /// Lock for guarding singleton creation, when Object_Manager
- /// hasn't been started up, or has already been shut down.
- ACE_Cleanup_Adapter<ACE_Recursive_Thread_Mutex> *singleton_recursive_lock_;
-#endif /* ACE_MT_SAFE */
-
-#if defined (ACE_HAS_TSS_EMULATION)
- // Main thread's thread-specific storage array.
- void *ts_storage_[ACE_TSS_Emulation::ACE_TSS_THREAD_KEYS_MAX];
-#endif /* ACE_HAS_TSS_EMULATION */
-
-#if !defined (ACE_HAS_NONSTATIC_OBJECT_MANAGER)
- friend class ACE_Object_Manager_Manager;
-#endif /* ACE_HAS_NONSTATIC_OBJECT_MANAGER */
-
- // Disallow copying by not implementing the following . . .
- ACE_Object_Manager (const ACE_Object_Manager &);
- ACE_Object_Manager &operator= (const ACE_Object_Manager &);
-};
-
-ACE_END_VERSIONED_NAMESPACE_DECL
-
-#include "ace/Static_Object_Lock.h"
-
-#if defined (__ACE_INLINE__)
-#include "ace/Object_Manager.inl"
-#endif /* __ACE_INLINE__ */
-
-#include "ace/Managed_Object.h"
-
-#if !defined (ACE_LACKS_ACE_SVCCONF)
-// We can't use the ACE_SVC_FACTORY_DECLARE macro here because this
-// needs to be in the ACE_Export context rather than the
-// ACE_Svc_Export context.
-ACE_BEGIN_VERSIONED_NAMESPACE_DECL
-class ACE_Service_Object;
-ACE_END_VERSIONED_NAMESPACE_DECL
-ACE_FACTORY_DECLARE (ACE, ACE_Service_Manager)
-#endif /* ! ACE_LACKS_ACE_SVCCONF */
-
-
-#include /**/ "ace/post.h"
-#endif /* ACE_OBJECT_MANAGER_H */