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// -*- C++ -*-
//==========================================================================
/**
* @file Null_Condition.h
*
* $Id$
*
* Moved from Synch.h.
*
* @author Douglas C. Schmidt <schmidt@cs.wustl.edu>
*/
//==========================================================================
#ifndef ACE_NULL_CONDITION_H
#define ACE_NULL_CONDITION_H
#include /**/ "ace/pre.h"
// All methods in this class are inline, so there is no
// need to import or export on Windows. -- CAE 12/18/2003
#include "ace/Null_Mutex.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "ace/os_include/os_errno.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
class ACE_Time_Value;
/**
* @class ACE_Null_Condition
*
* @brief Implement a do nothing ACE_Condition variable wrapper,
* i.e., all methods are no ops. This class is necessary since
* some C++ compilers are *very* lame...
*/
class ACE_Null_Condition
{
public:
ACE_Null_Condition (const ACE_Null_Mutex &m,
const ACE_TCHAR * = 0,
void * = 0)
: mutex_ ((ACE_Null_Mutex &) m) {}
~ACE_Null_Condition (void) {}
/// Returns 0.
int remove (void) {return 0;}
/// Returns -1 with @c errno == @c ETIME.
int wait (const ACE_Time_Value * = 0) {errno = ETIME; return -1;}
/// Returns -1 with @c errno == @c ETIME.
int wait (ACE_Null_Mutex &,
const ACE_Time_Value * = 0) {errno = ETIME; return -1;}
/// Returns 0.
int signal (void) {return 0;}
/// Returns 0.
int broadcast (void) {return 0;}
ACE_Null_Mutex &mutex (void) {return this->mutex_;};
/// Dump the state of an object.
void dump (void) const {}
// ACE_ALLOC_HOOK_DECLARE;
// Declare the dynamic allocation hooks.
protected:
ACE_Null_Mutex &mutex_; // Reference to mutex lock.
private:
// = Prevent assignment and initialization.
void operator= (const ACE_Null_Condition &);
ACE_Null_Condition (const ACE_Null_Condition &);
};
ACE_END_VERSIONED_NAMESPACE_DECL
#include /**/ "ace/post.h"
#endif /* ACE_NULL_CONDITION_H */
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