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// -*- C++ -*-
//=============================================================================
/**
* @file Incoming_Message_Stack.h
*
* @author Frank Rehberger <frehberg@prismtech.com>
*/
//=============================================================================
#ifndef TAO_INCOMING_MESSAGE_STACK_H
#define TAO_INCOMING_MESSAGE_STACK_H
#include /**/ "ace/pre.h"
#include "tao/Queued_Data.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include /**/ "tao/TAO_Export.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
class ACE_Allocator;
ACE_END_VERSIONED_NAMESPACE_DECL
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
namespace TAO
{
/**
* @class Incoming_Message_Stack
*
* @brief Implements stack for TAO_Queued_Data.
*
* Internal class, providing stack functionality for TAO_Queued_Data
* objects. Stack operations don't require memory allocation.
*/
class TAO_Export Incoming_Message_Stack
{
public:
/// default constructor, initiliazes empty stack.
Incoming_Message_Stack();
/// destructor, releases all elements on stack
~Incoming_Message_Stack() ;
/// pushing a new element onto stack,
/// @a data must be a valid pointer, not NULL
void push(TAO_Queued_Data *data);
/// removing top element of stack,
/// @return 0 for Ok and @a data is defined, -1 for error
int pop (TAO_Queued_Data* &data);
/// peeking top element of stack
/// @return 0 for Ok, -1 for error
int top (TAO_Queued_Data* &data) const;
private:
/// Top element of stack
TAO_Queued_Data *top_;
private:
/// Default Copy-Constructor - not for public usage.
Incoming_Message_Stack (const Incoming_Message_Stack&);
/// Assignment operator - not for public usage
Incoming_Message_Stack& operator= (Incoming_Message_Stack& other);
};
}
TAO_END_VERSIONED_NAMESPACE_DECL
#if defined (__ACE_INLINE__)
# include "tao/Incoming_Message_Stack.inl"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /*TAO_INCOMING_MESSAGE_STACK_H*/
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