323 lines
8.4 KiB
C
323 lines
8.4 KiB
C
/**
|
|
* @file allocator.h
|
|
*
|
|
* @brief Interface of allocator_t.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2005 Jan Hutter, Martin Willi
|
|
* Hochschule fuer Technik Rapperswil
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* for more details.
|
|
*/
|
|
|
|
#ifndef ALLOCATOR_H_
|
|
#define ALLOCATOR_H_
|
|
|
|
#include <stdlib.h>
|
|
#include <stddef.h>
|
|
#include <string.h>
|
|
|
|
#include <types.h>
|
|
|
|
|
|
/**
|
|
* Macro to allocate a special type.
|
|
*
|
|
* @param thing object on which a sizeof is performed
|
|
* @return
|
|
* - Pointer to allocated memory
|
|
* - NULL if out of ressources.
|
|
*
|
|
* @ingroup utils
|
|
*/
|
|
#define allocator_alloc_thing_as_chunk(thing) (allocator_alloc_as_chunk(sizeof(thing)))
|
|
|
|
/**
|
|
* Macro to allocate a special type as chunk_t.
|
|
*
|
|
* @param thing object on which a sizeof is performed
|
|
* @return
|
|
* - chunk_t pointing to allocated memory if successful
|
|
* - chunk_t containing empty pointer if out of ressources
|
|
*
|
|
* @ingroup utils
|
|
*/
|
|
#define allocator_alloc_thing(thing) (allocator_alloc(sizeof(thing)))
|
|
|
|
#ifdef LEAK_DETECTIVE
|
|
|
|
typedef struct allocator_t allocator_t;
|
|
|
|
/**
|
|
*@brief Allocater object use to detect memory leaks.
|
|
*
|
|
* @ingroup utils
|
|
*/
|
|
struct allocator_t {
|
|
|
|
/**
|
|
* Allocates memory with LEAK_DETECTION and
|
|
* returns an empty data area filled with zeros.
|
|
*
|
|
* @warning Use this function not directly, only with assigned macros
|
|
* #allocator_alloc and #allocator_alloc_thing.
|
|
*
|
|
* @param this allocator_t object
|
|
* @param bytes number of bytes to allocate
|
|
* @param file filename from which the memory is allocated
|
|
* @param line line number in specific file
|
|
* @return
|
|
* - pointer to allocated memory area
|
|
* - NULL if out of ressources
|
|
*/
|
|
void * (*allocate) (allocator_t *this,size_t bytes, char * file,int line);
|
|
|
|
/**
|
|
* Allocates memory with LEAK_DETECTION and
|
|
* returns an chunk pointing to an empy data area filled with zeros.
|
|
*
|
|
* @warning Use this function not directly, only with assigned
|
|
* macros #allocator_alloc_as_chunk and
|
|
* #allocator_alloc_thing_as_chunk.
|
|
*
|
|
* @param this allocator_t object
|
|
* @param bytes number of bytes to allocate
|
|
* @param file filename from which the memory is allocated
|
|
* @param line line number in specific file
|
|
* @return
|
|
* - pointer to allocated memory area
|
|
* - NULL if out of ressources
|
|
*/
|
|
chunk_t (*allocate_as_chunk) (allocator_t *this,size_t bytes, char * file,int line);
|
|
|
|
/**
|
|
* Reallocates memory with LEAK_DETECTION and
|
|
* returns an empty data area filled with zeros.
|
|
*
|
|
* @warning Use this function not directly, only with assigned macro
|
|
* #allocator_realloc.
|
|
*
|
|
* @param this allocator_t object
|
|
* @param old pointer to the old data area
|
|
* @param bytes number of bytes to allocate
|
|
* @param file filename from which the memory is allocated
|
|
* @param line line number in specific file
|
|
* @return
|
|
* - pointer to reallocated memory area
|
|
* - NULL if out of ressources
|
|
*/
|
|
void * (*reallocate) (allocator_t *this,void * old, size_t bytes, char * file, int line);
|
|
|
|
/**
|
|
* Clones memory with LEAK_DETECTION and returns a cloned data area.
|
|
*
|
|
* @warning Use this function not directly, only with assigned macro
|
|
* #allocator_clone_bytes.
|
|
*
|
|
* @param this allocator_t object
|
|
* @param old pointer to the old data area
|
|
* @param bytes number of bytes to allocate
|
|
* @param file filename from which the memory is allocated
|
|
* @param line line number in specific file
|
|
* @return
|
|
* - pointer to reallocated memory area if successful
|
|
* - NULL if out of ressources
|
|
*/
|
|
void * (*clone_bytes) (allocator_t *this,void * to_clone, size_t bytes, char * file, int line);
|
|
|
|
/**
|
|
* Clones a chunk with LEAK_DETECTION and returns a cloned chunk.
|
|
*
|
|
* @warning Use this function not directly, only with assigned macro
|
|
* #allocator_clone_chunk-
|
|
*
|
|
* @param this allocator_t object
|
|
* @param chunk chunk to clone
|
|
* @param file filename from which the memory is allocated
|
|
* @param line line number in specific file
|
|
* @return
|
|
* - pointer to reallocated memory area if successful
|
|
* - NULL if out of ressources
|
|
*/
|
|
chunk_t (*clone_chunk) (allocator_t *this, chunk_t chunk, char * file, int line);
|
|
|
|
/**
|
|
* Frees memory with LEAK_DETECTION.
|
|
*
|
|
* @warning Use this function not directly, only with assigned macro
|
|
* #allocator_free.
|
|
*
|
|
* @param this allocator_t object
|
|
* @param pointer pointer to the data area to free
|
|
*/
|
|
void (*free_pointer) (allocator_t *this,void * pointer);
|
|
|
|
/**
|
|
* Report memory leaks to stderr.
|
|
*
|
|
* @warning Use this function not directly, only with assigned macro
|
|
* #report_memory_leaks
|
|
*
|
|
* @param this allocator_t object
|
|
*/
|
|
void (*report_memory_leaks) (allocator_t *this);
|
|
};
|
|
|
|
|
|
/**
|
|
* @brief Global allocater_t object.
|
|
*
|
|
* Only accessed over macros.
|
|
*/
|
|
extern allocator_t *global_allocator;
|
|
|
|
|
|
/**
|
|
* Macro to allocate some memory.
|
|
*
|
|
* See #allocator_t.allocate for description.
|
|
*
|
|
* @ingroup utils
|
|
*/
|
|
#define allocator_alloc(bytes) (global_allocator->allocate(global_allocator,bytes,__FILE__,__LINE__))
|
|
|
|
/**
|
|
* Macro to allocate some memory for a chunk_t.
|
|
*
|
|
* See #allocator_t.allocate_as_chunk for description.
|
|
*
|
|
* @ingroup utils
|
|
*/
|
|
#define allocator_alloc_as_chunk(bytes) (global_allocator->allocate_as_chunk(global_allocator,bytes,__FILE__,__LINE__))
|
|
|
|
/**
|
|
* Macro to reallocate some memory.
|
|
*
|
|
* See #allocator_t.reallocate for description.
|
|
*
|
|
* @ingroup utils
|
|
*/
|
|
#define allocator_realloc(old,bytes) (global_allocator->reallocate(global_allocator,old,bytes,__FILE__, __LINE__))
|
|
|
|
/**
|
|
* Macro to clone some memory.
|
|
*
|
|
* See #allocator_t.*clone_bytes for description.
|
|
*
|
|
* @ingroup utils
|
|
*/
|
|
#define allocator_clone_bytes(old,bytes) (global_allocator->clone_bytes(global_allocator,old,bytes,__FILE__, __LINE__))
|
|
|
|
|
|
/**
|
|
* Macro to clone a chunk and its contents
|
|
*
|
|
* See #allocator_t.clone_chunk for description.
|
|
*
|
|
* @ingroup utils
|
|
*/
|
|
#define allocator_clone_chunk(chunk) (global_allocator->clone_chunk(global_allocator,chunk,__FILE__, __LINE__))
|
|
|
|
/**
|
|
* Macro to free some memory.
|
|
*
|
|
* See #allocator_t.free_pointer for description.
|
|
*
|
|
* @ingroup utils
|
|
*/
|
|
#define allocator_free(pointer) (global_allocator->free_pointer(global_allocator,pointer))
|
|
/**
|
|
* Macro to free a chunk.
|
|
*/
|
|
#define allocator_free_chunk(chunk){ \
|
|
global_allocator->free_pointer(global_allocator,(chunk)->ptr); \
|
|
(chunk)->ptr = NULL; \
|
|
(chunk)->len = 0; \
|
|
}
|
|
/**
|
|
* Macro to report memory leaks.
|
|
*
|
|
* See #allocator_s.report_memory_leaks for description.
|
|
*
|
|
* @ingroup utils
|
|
*/
|
|
#define report_memory_leaks(void) (global_allocator->report_memory_leaks(global_allocator))
|
|
#else
|
|
/**
|
|
* Macro to allocate some memory.
|
|
*
|
|
* @ingroup utils
|
|
*/
|
|
#define allocator_alloc(bytes) (malloc(bytes))
|
|
|
|
/**
|
|
* Allocate some memory as chunk.
|
|
*
|
|
* @ingroup utils
|
|
*/
|
|
chunk_t allocator_alloc_as_chunk(size_t bytes);
|
|
|
|
/**
|
|
* Reallocate some memory.
|
|
*
|
|
* @ingroup utils
|
|
*/
|
|
void * allocator_realloc(void * old, size_t newsize);
|
|
|
|
/**
|
|
* Free allocated memory.
|
|
*
|
|
* @ingroup utils
|
|
*/
|
|
#define allocator_free(pointer) (free(pointer))
|
|
|
|
/**
|
|
* Clone bytes.
|
|
*
|
|
*
|
|
* @param pointer pointer to read data from
|
|
* @param size number of bytes to clone
|
|
*
|
|
* @ingroup utils
|
|
*/
|
|
void * allocator_clone_bytes(void * pointer, size_t size);
|
|
|
|
/**
|
|
* Clone a chunk and its contents.
|
|
*
|
|
*
|
|
* @param chunk chunk to clone
|
|
* @return cloned chunk
|
|
*
|
|
* @ingroup utils
|
|
*/
|
|
chunk_t allocator_clone_bytes(chunk_t chunk);
|
|
|
|
/**
|
|
* Frees memory used by chunk.
|
|
*
|
|
* @param chunk pointer of chunk to free
|
|
*
|
|
* @ingroup utils
|
|
*/
|
|
void allocator_free_chunk(chunk_t *chunk);
|
|
|
|
/**
|
|
* Report memory leaks.
|
|
*
|
|
* @ingroup utils
|
|
*/
|
|
#define report_memory_leaks(void) {}
|
|
#endif
|
|
|
|
#endif /*ALLOCATOR_H_*/
|