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// -*- C++ -*-
//=============================================================================
/**
* @file POSIX_CB_Proactor.h
*
* @author Alexander Libman <alibman@ihug.com.au>
*/
//=============================================================================
#ifndef ACE_POSIX_CB_PROACTOR_H
#define ACE_POSIX_CB_PROACTOR_H
#include /**/ "ace/config-all.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#if defined (ACE_HAS_AIO_CALLS)
#include "ace/Synch_Traits.h"
#include "ace/Thread_Semaphore.h"
#include "ace/Null_Semaphore.h"
#include "ace/POSIX_Proactor.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
/**
* @class ACE_POSIX_CB_Proactor
*
* @brief Implementation of Callback-based Proactor
*/
class ACE_Export ACE_POSIX_CB_Proactor : public ACE_POSIX_AIOCB_Proactor
{
public:
virtual Proactor_Type get_impl_type ();
/// Destructor.
virtual ~ACE_POSIX_CB_Proactor ();
/// Constructor defines max number asynchronous operations that can
/// be started at the same time.
ACE_POSIX_CB_Proactor (size_t max_aio_operations = ACE_AIO_DEFAULT_SIZE);
// This only public so the "extern C" completion function can see it
// when needed.
static void aio_completion_func (sigval cb_data);
protected:
/**
* Dispatch a single set of events. If @a wait_time elapses before
* any events occur, return 0. Return 1 on success i.e., when a
* completion is dispatched, non-zero (-1) on errors and errno is
* set accordingly.
*/
virtual int handle_events (ACE_Time_Value &wait_time);
/**
* Block indefinitely until at least one event is dispatched.
* Dispatch a single set of events. If @a wait_time elapses before
* any events occur, return 0. Return 1 on success i.e., when a
* completion is dispatched, non-zero (-1) on errors and errno is
* set accordingly.
*/
virtual int handle_events ();
/// Find free slot to store result and aiocb pointer
virtual ssize_t allocate_aio_slot (ACE_POSIX_Asynch_Result *result);
/// Notify queue of "post_completed" ACE_POSIX_Asynch_Results
/// called from post_completion method
virtual int notify_completion (int sig_num);
/**
* Dispatch a single set of events. If @a milli_seconds elapses
* before any events occur, return 0. Return 1 if a completion is
* dispatched. Return -1 on errors.
*/
int handle_events_i (u_long milli_seconds);
/// Semaphore variable to notify
/// used to wait the first AIO start
ACE_SYNCH_SEMAPHORE sema_;
};
ACE_END_VERSIONED_NAMESPACE_DECL
#endif /* ACE_HAS_AIO_CALLS */
#endif /* ACE_POSIX_CB_PROACTOR_H*/
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