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92 lines
2.3 KiB
C++
92 lines
2.3 KiB
C++
// -*- C++ -*-
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//==========================================================================
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/**
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* @file Null_Condition.h
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*
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* Moved from Synch.h.
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*
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* @author Douglas C. Schmidt <schmidt@cs.wustl.edu>
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*/
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//==========================================================================
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#ifndef ACE_NULL_CONDITION_H
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#define ACE_NULL_CONDITION_H
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#include /**/ "ace/pre.h"
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#include "ace/Null_Mutex.h"
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#include "ace/Condition_T.h"
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#if !defined (ACE_LACKS_PRAGMA_ONCE)
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# pragma once
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#endif /* ACE_LACKS_PRAGMA_ONCE */
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#include "ace/os_include/os_errno.h"
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ACE_BEGIN_VERSIONED_NAMESPACE_DECL
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class ACE_Time_Value;
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class ACE_Condition_Attributes;
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template <class MUTEX> class ACE_Condition;
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/**
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* @brief ACE_Condition template specialization written using
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* ACE_Null_Mutexes. Implements a do nothing ACE_Condition
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* specialization, i.e., all methods are no ops.
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*/
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template <>
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class ACE_Condition<ACE_Null_Mutex>
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{
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public:
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ACE_Condition (const ACE_Null_Mutex &m,
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const ACE_TCHAR * = 0,
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void * = 0)
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: mutex_ ((ACE_Null_Mutex &) m) {}
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ACE_Condition (const ACE_Null_Mutex &m,
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const ACE_Condition_Attributes &,
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const ACE_TCHAR * = 0,
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void * = 0)
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: mutex_ ((ACE_Null_Mutex &) m) {}
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~ACE_Condition (void) {}
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/// Returns 0.
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int remove (void) {return 0;}
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/// Returns -1 with @c errno == @c ETIME.
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int wait (const ACE_Time_Value * = 0) {errno = ETIME; return -1;}
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/// Returns -1 with @c errno == @c ETIME.
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int wait (ACE_Null_Mutex &,
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const ACE_Time_Value * = 0) {errno = ETIME; return -1;}
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/// Returns 0.
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int signal (void) {return 0;}
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/// Returns 0.
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int broadcast (void) {return 0;}
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ACE_Null_Mutex &mutex (void) {return this->mutex_;};
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/// Dump the state of an object.
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void dump (void) const {}
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// ACE_ALLOC_HOOK_DECLARE;
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// Declare the dynamic allocation hooks.
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protected:
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ACE_Null_Mutex &mutex_; // Reference to mutex lock.
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private:
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// = Prevent assignment and initialization.
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void operator= (const ACE_Condition<ACE_Null_Mutex> &);
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ACE_Condition (const ACE_Condition<ACE_Null_Mutex> &);
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};
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typedef ACE_Condition<ACE_Null_Mutex> ACE_Null_Condition;
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ACE_END_VERSIONED_NAMESPACE_DECL
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#include /**/ "ace/post.h"
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#endif /* ACE_NULL_CONDITION_H */
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