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// -*- C++ -*-
//==========================================================================
/**
* @file Null_Condition.h
*
* @author Douglas C. Schmidt <d.schmidt@vanderbilt.edu>
*/
//==========================================================================
#ifndef ACE_NULL_CONDITION_H
#define ACE_NULL_CONDITION_H
#include /**/ "ace/pre.h"
#include "ace/Null_Mutex.h"
#include "ace/Condition_T.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_Condition_Attributes;
template <class MUTEX> class ACE_Condition;
/**
* @brief ACE_Condition template specialization written using
* ACE_Null_Mutexes. Implements a do nothing ACE_Condition
* specialization, i.e., all methods are no ops.
*/
template <>
class ACE_Condition<ACE_Null_Mutex>
{
public:
ACE_Condition (const ACE_Null_Mutex &m,
const ACE_TCHAR * = 0,
void * = 0)
: mutex_ ((ACE_Null_Mutex &) m) {}
ACE_Condition (const ACE_Null_Mutex &m,
const ACE_Condition_Attributes &,
const ACE_TCHAR * = 0,
void * = 0)
: mutex_ ((ACE_Null_Mutex &) m) {}
~ACE_Condition () = default;
/// Returns 0.
int remove () {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 () {return 0;}
/// Returns 0.
int broadcast () {return 0;}
ACE_Null_Mutex &mutex () {return this->mutex_;};
/// Dump the state of an object.
void dump () const {}
// ACE_ALLOC_HOOK_DECLARE;
// Declare the dynamic allocation hooks.
protected:
ACE_Null_Mutex &mutex_; // Reference to mutex lock.
private:
void operator= (const ACE_Condition<ACE_Null_Mutex> &) = delete;
ACE_Condition (const ACE_Condition<ACE_Null_Mutex> &) = delete;
};
typedef ACE_Condition<ACE_Null_Mutex> ACE_Null_Condition;
ACE_END_VERSIONED_NAMESPACE_DECL
#include /**/ "ace/post.h"
#endif /* ACE_NULL_CONDITION_H */
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