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/* -*- C++ -*- */
//=============================================================================
/**
* @file Malloc_Allocator.h
*
* $Id$
*
* @author Priyanka Gontla <pgontla@ece.uci.edu>
*/
//=============================================================================
#ifndef MALLOC_ALLOCATOR_H
#define MALLOC_ALLOCATOR_H
#include "ace/pre.h"
#include "ace/ACE.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "ace/Malloc_Base.h"
#include "ace/Log_Msg.h"
#if defined (ACE_HAS_MALLOC_STATS)
#include "ace/Synch_T.h"
#if defined (ACE_HAS_THREADS)
#define ACE_PROCESS_MUTEX ACE_Process_Mutex
#else
#include "ace/SV_Semaphore_Simple.h"
#define ACE_PROCESS_MUTEX ACE_SV_Semaphore_Simple
#endif /* ACE_HAS_THREADS */
typedef ACE_Atomic_Op<ACE_PROCESS_MUTEX, int> ACE_INT;
/// This keeps stats on the usage of the memory manager.
struct ACE_Export ACE_Malloc_Stats
{
ACE_Malloc_Stats (void);
void dump (void) const;
/// Coarse-grained unit of allocation.
ACE_INT nchunks_;
/// Fine-grained unit of allocation.
ACE_INT nblocks_;
/// Number of blocks in use
ACE_INT ninuse_;
};
#define ACE_MALLOC_STATS(X) X
#else
#define ACE_MALLOC_STATS(X)
#endif /* ACE_HAS_MALLOC_STATS */
/**
* @class ACE_New_Allocator
*
* @brief Defines a class that provided a simple implementation of
* memory allocation.
*
* This class uses the new/delete operators to allocate and free up
* memory. Please note that the only methods that are supported are
* <malloc>, <calloc>, and <free>. All other methods are no-ops that
* return -1 and set <errno> to <ENOTSUP>. If you require this
* functionality, please use: ACE_Allocator_Adapter <ACE_Malloc
* <ACE_LOCAL_MEMORY_POOL, MUTEX> >, which will allow you to use the
* added functionality of bind/find/etc. while using the new/delete
* operators.
*/
class ACE_Export ACE_New_Allocator : public ACE_Allocator
{
public:
/// These methods are defined.
virtual void *malloc (size_t nbytes);
virtual void *calloc (size_t nbytes, char initial_value = '\0');
virtual void *calloc (size_t n_elem, size_t elem_size, char initial_value = '\0');
virtual void free (void *ptr);
/// These methods are no-ops.
virtual int remove (void);
virtual int bind (const char *name, void *pointer, int duplicates = 0);
virtual int trybind (const char *name, void *&pointer);
virtual int find (const char *name, void *&pointer);
virtual int find (const char *name);
virtual int unbind (const char *name);
virtual int unbind (const char *name, void *&pointer);
virtual int sync (ssize_t len = -1, int flags = MS_SYNC);
virtual int sync (void *addr, size_t len, int flags = MS_SYNC);
virtual int protect (ssize_t len = -1, int prot = PROT_RDWR);
virtual int protect (void *addr, size_t len, int prot = PROT_RDWR);
#if defined (ACE_HAS_MALLOC_STATS)
virtual void print_stats (void) const;
#endif /* ACE_HAS_MALLOC_STATS */
virtual void dump (void) const;
private:
// DO NOT ADD ANY STATE (DATA MEMBERS) TO THIS CLASS!!!! See the
// <ACE_Allocator::instance> implementation for explanation.
};
/**
* @class ACE_Static_Allocator_Base
*
* @brief Defines a class that provided a highly optimized memory
* management scheme for allocating memory statically.
*
* This class manages a fixed-size <POOL_SIZE> of memory. Every
* time <malloc>/<calloc> is called, it simply moves an internal
* index forward and returns a pointer to the requested chunk.
* All memory is allocated statically (typically via the
* <ACE_Static_Allocator> template) and <free> is a no-op. This
* behavior is useful for use-cases where all the memory
* allocation needs are known in advance and no deletions ever
* occur.
*/
class ACE_Export ACE_Static_Allocator_Base : public ACE_Allocator
{
public:
ACE_Static_Allocator_Base (char *buffer, size_t size);
virtual void *malloc (size_t nbytes);
virtual void *calloc (size_t nbytes, char initial_value = '\0');
virtual void *calloc (size_t n_elem, size_t elem_size, char initial_value = '\0');
virtual void free (void *ptr);
virtual int remove (void);
virtual int bind (const char *name, void *pointer, int duplicates = 0);
virtual int trybind (const char *name, void *&pointer);
virtual int find (const char *name, void *&pointer);
virtual int find (const char *name);
virtual int unbind (const char *name);
virtual int unbind (const char *name, void *&pointer);
virtual int sync (ssize_t len = -1, int flags = MS_SYNC);
virtual int sync (void *addr, size_t len, int flags = MS_SYNC);
virtual int protect (ssize_t len = -1, int prot = PROT_RDWR);
virtual int protect (void *addr, size_t len, int prot = PROT_RDWR);
#if defined (ACE_HAS_MALLOC_STATS)
virtual void print_stats (void) const;
#endif /* ACE_HAS_MALLOC_STATS */
virtual void dump (void) const;
protected:
/// Don't allow direct instantiations of this class.
ACE_Static_Allocator_Base (void);
/// Pointer to the buffer.
char *buffer_;
/// Size of the buffer.
size_t size_;
/// Pointer to the current offset in the <buffer_>.
size_t offset_;
};
#if defined (__ACE_INLINE__)
#include "ace/Malloc_Allocator.i"
#endif /* __ACE_INLINE__ */
#include "ace/post.h"
#endif /* MALLOC_ALLOCATOR_H */
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