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84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
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/******************************************************
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The lowest-level memory management
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(c) 1994, 1995 Innobase Oy
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Created 6/9/1994 Heikki Tuuri
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*******************************************************/
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#ifndef mem0pool_h
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#define mem0pool_h
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#include "univ.i"
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#include "os0file.h"
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typedef struct mem_area_struct mem_area_t;
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typedef struct mem_pool_struct mem_pool_t;
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/* The common memory pool */
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extern mem_pool_t* mem_comm_pool;
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/* Each memory area takes this many extra bytes for control information */
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#define MEM_AREA_EXTRA_SIZE UNIV_MEM_ALIGNMENT
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/************************************************************************
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Creates a memory pool. */
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mem_pool_t*
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mem_pool_create(
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/*============*/
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/* out: memory pool */
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ulint size); /* in: pool size in bytes */
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/************************************************************************
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Allocates memory from a pool. NOTE: This low-level function should only be
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used in mem0mem.*! */
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void*
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mem_area_alloc(
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/*===========*/
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/* out, own: allocated memory buffer */
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ulint size, /* in: allocated size in bytes; for optimum
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space usage, the size should be a power of 2
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minus MEM_AREA_EXTRA_SIZE */
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mem_pool_t* pool); /* in: memory pool */
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/************************************************************************
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Frees memory to a pool. */
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void
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mem_area_free(
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/*==========*/
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void* ptr, /* in, own: pointer to allocated memory
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buffer */
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mem_pool_t* pool); /* in: memory pool */
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/************************************************************************
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Returns the amount of reserved memory. */
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ulint
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mem_pool_get_reserved(
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/*==================*/
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/* out: reserved mmeory in bytes */
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mem_pool_t* pool); /* in: memory pool */
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/************************************************************************
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Validates a memory pool. */
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ibool
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mem_pool_validate(
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/*==============*/
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/* out: TRUE if ok */
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mem_pool_t* pool); /* in: memory pool */
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/************************************************************************
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Prints info of a memory pool. */
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void
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mem_pool_print_info(
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/*================*/
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FILE* outfile,/* in: output file to write to */
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mem_pool_t* pool); /* in: memory pool */
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#ifndef UNIV_NONINL
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#include "mem0pool.ic"
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#endif
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#endif
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