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/* -*- C++ -*- */
//=============================================================================
/**
* @file Obstack.h
*
* $Id$
*
* @author Doug Schmidt
*/
//=============================================================================
#ifndef ACE_OBSTACK_H
#define ACE_OBSTACK_H
#include "ace/pre.h"
#include "ace/Malloc.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
/**
* @class ACE_Obchunk
*
* @brief Defines the state that represents a "chunk" of memory.
*/
class ACE_Export ACE_Obchunk
{
public:
friend class ACE_Obstack;
/// Constructor.
ACE_Obchunk (size_t size);
/// dtor.
~ACE_Obchunk (void);
/// Dump the state of an object.
void dump (void) const;
/// Declare the dynamic allocation hooks.
ACE_ALLOC_HOOK_DECLARE;
private:
/// Pointer to the end of the chunk.
ACE_TCHAR *end_;
/// Pointer to the current location in the chunk.
ACE_TCHAR *cur_;
/// Next chunk in the chain.
ACE_Obchunk *next_;
/**
* Pointer to the beginning contents of this chunk. This field is
* actually overlayed by the memory allocated by
* <ACE_Obstack::new_chunk>. Therefore, it *must* come last.
*/
ACE_TCHAR contents_[4];
};
/**
* @class ACE_Obstack
*
* @brief Define a simple "mark and release" memory allocation utility.
*
* The implementation is similar to the GNU obstack utility,
* which is used extensively in the GCC compiler.
*/
class ACE_Export ACE_Obstack
{
public:
// = Initialization and termination methods.
ACE_Obstack (size_t size = 4096 - sizeof (ACE_Obchunk),
ACE_Allocator *allocator_strategy = 0);
~ACE_Obstack (void);
/// Copy the data into the current Obchunk.
ACE_TCHAR *copy (const ACE_TCHAR *data,
size_t len);
/// "Release" the entire stack of Obchunks, putting it back on the
/// free list.
void release (void);
/// Dump the state of an object.
void dump (void) const;
/// Declare the dynamic allocation hooks.
ACE_ALLOC_HOOK_DECLARE;
protected:
class ACE_Obchunk *new_chunk (void);
/// Pointer to the allocator used by this Obstack.
ACE_Allocator *allocator_strategy_;
/// Current size of the Obstack;
size_t size_;
// = Don't change the order of the following two fields.
/**
* @class ACE_Obchunk
Head of the Obchunk chain.
*/
class ACE_Obchunk *head_;
/**
* @class ACE_Obchunk
Pointer to the current Obchunk.
*/
class ACE_Obchunk *curr_;
};
#if defined (__ACE_INLINE__)
#include "ace/Obstack.i"
#endif /* __ACE_INLINE__ */
#include "ace/post.h"
#endif /* ACE_OBSTACK_H */
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