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//=============================================================================
/**
* @file Base_Thread_Adapter.h
*
* $Id$
*
* @author Nanbor Wang <nanbor@cs.wustl.edu>
*/
//=============================================================================
#ifndef ACE_BASE_THREAD_ADAPTER_H
#define ACE_BASE_THREAD_ADAPTER_H
#include "ace/pre.h"
#include "ace/OS_Log_Msg_Attributes.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "ace/OS_Export.h"
// Run the thread entry point for the <ACE_Thread_Adapter>. This must
// be an extern "C" to make certain compilers happy...
#if defined (ACE_PSOS)
extern "C" void ace_thread_adapter (unsigned long args);
#else /* ! defined (ACE_PSOS) */
extern "C" ACE_OS_Export void *ace_thread_adapter (void *args);
#endif /* ACE_PSOS */
/**
* @class ACE_OS_Thread_Descriptor
*
* @brief Parent class of all ACE_Thread_Descriptor classes.
* =
* Container for ACE_Thread_Descriptor members that are
* used in ACE_OS.
*/
class ACE_OS_Export ACE_OS_Thread_Descriptor
{
public:
/// Get the thread creation flags.
long flags (void) const;
protected:
/// For use by ACE_Thread_Descriptor.
ACE_OS_Thread_Descriptor (long flags = 0);
/**
* Keeps track of whether this thread was created "detached" or not.
* If a thread is *not* created detached then if someone calls
* <ACE_Thread_Manager::wait>, we need to join with that thread (and
* close down the handle).
*/
long flags_;
};
/**
* @class ACE_Base_Thread_Adapter
*
* @brief Base class for all the Thread_Adapters.
*
* Converts a C++ function into a function <ace_thread_adapter>
* function that can be called from a thread creation routine
* (e.g., <pthread_create> or <_beginthreadex>) that expects an
* extern "C" entry point. This class also makes it possible to
* transparently provide hooks to register a thread with an
* <ACE_Thread_Manager>.
* This class is used in <ACE_OS::thr_create>. In general, the
* thread that creates an object of this class is different from
* the thread that calls <invoke> on this object. Therefore,
* the <invoke> method is responsible for deleting itself.
*/
class ACE_OS_Export ACE_Base_Thread_Adapter
{
public:
/// Constructor.
ACE_Base_Thread_Adapter (ACE_THR_FUNC user_func,
void *arg,
ACE_THR_C_FUNC entry_point = (ACE_THR_C_FUNC) ace_thread_adapter,
ACE_OS_Thread_Descriptor *td = 0
# if defined (ACE_HAS_WIN32_STRUCTURAL_EXCEPTIONS)
, ACE_SEH_EXCEPT_HANDLER selector = 0
, ACE_SEH_EXCEPT_HANDLER handler = 0
# endif /* ACE_HAS_WIN32_STRUCTURAL_EXCEPTIONS */
);
/// Virtual method invoked by the thread entry point.
virtual void *invoke (void) = 0;
/// Accessor for the C entry point function to the OS thread creation
/// routine.
ACE_THR_C_FUNC entry_point (void);
/// Invoke the close_log_msg_hook, if it is present
static void close_log_msg (void);
/// Invoke the sync_log_msg_hook, if it is present
static void sync_log_msg (const ACE_TCHAR *prog_name);
/// Invoke the thr_desc_log_msg_hook, if it is present
static ACE_OS_Thread_Descriptor *thr_desc_log_msg (void);
protected:
/// Destructor, making it private ensures that objects of this class
/// are allocated on the heap.
virtual ~ACE_Base_Thread_Adapter (void);
/// Inherit the logging features if the parent thread has an
/// <ACE_Log_Msg>.
void inherit_log_msg (void);
private:
/// The hooks to inherit and cleanup the Log_Msg attributes
static ACE_INIT_LOG_MSG_HOOK init_log_msg_hook_;
static ACE_INHERIT_LOG_MSG_HOOK inherit_log_msg_hook_;
static ACE_CLOSE_LOG_MSG_HOOK close_log_msg_hook_;
static ACE_SYNC_LOG_MSG_HOOK sync_log_msg_hook_;
static ACE_THR_DESC_LOG_MSG_HOOK thr_desc_log_msg_hook_;
/// Set the Log_Msg hooks
static void set_log_msg_hooks (ACE_INIT_LOG_MSG_HOOK init_hook,
ACE_INHERIT_LOG_MSG_HOOK inherit_hook,
ACE_CLOSE_LOG_MSG_HOOK close_hook,
ACE_SYNC_LOG_MSG_HOOK sync_hook,
ACE_THR_DESC_LOG_MSG_HOOK thr_desc);
/// Allow the ACE_Log_Msg class to set its hooks.
friend class ACE_Log_Msg;
protected:
/// Thread startup function passed in by the user (C++ linkage).
ACE_THR_FUNC user_func_;
/// Argument to thread startup function.
void *arg_;
/// Entry point to the underlying OS thread creation call (C
/// linkage).
ACE_THR_C_FUNC entry_point_;
/**
* Optional thread descriptor. Passing this pointer in will force
* the spawned thread to cache this location in <Log_Msg> and wait
* until <Thread_Manager> fills in all information in thread
* descriptor.
*/
ACE_OS_Thread_Descriptor *thr_desc_;
/// The ACE_Log_Msg attributes.
ACE_OS_Log_Msg_Attributes log_msg_attributes_;
/// Friend declaration to avoid compiler warning: only defines a private
/// destructor and has no friends.
friend class ACE_Thread_Adapter_Has_Private_Destructor;
};
# if defined (ACE_HAS_INLINED_OSCALLS)
# if defined (ACE_INLINE)
# undef ACE_INLINE
# endif /* ACE_INLINE */
# define ACE_INLINE inline
# include "ace/Base_Thread_Adapter.inl"
# endif /* ACE_HAS_INLINED_OSCALLS */
#include "ace/post.h"
#endif /* ACE_BASE_THREAD_ADAPTER_H */
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