131 lines
4.0 KiB
C
131 lines
4.0 KiB
C
/* Copyright (c) 2012, 2017, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#ifndef MYSQL_SERVICE_MYSQL_ALLOC_INCLUDED
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#define MYSQL_SERVICE_MYSQL_ALLOC_INCLUDED
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/**
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@file include/mysql/service_mysql_alloc.h
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*/
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#ifndef MYSQL_ABI_CHECK
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#include <stdlib.h>
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#endif
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/* PSI_memory_key */
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#include "mysql/components/services/psi_memory_bits.h"
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/* myf */
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typedef int myf_t;
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typedef void *(*mysql_malloc_t)(PSI_memory_key key, size_t size, myf_t flags);
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typedef void *(*mysql_realloc_t)(PSI_memory_key key, void *ptr, size_t size,
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myf_t flags);
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typedef void (*mysql_claim_t)(const void *ptr);
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typedef void (*mysql_free_t)(void *ptr);
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typedef void *(*my_memdup_t)(PSI_memory_key key, const void *from,
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size_t length, myf_t flags);
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typedef char *(*my_strdup_t)(PSI_memory_key key, const char *from, myf_t flags);
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typedef char *(*my_strndup_t)(PSI_memory_key key, const char *from,
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size_t length, myf_t flags);
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/**
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@ingroup group_ext_plugin_services
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This service allows plugins to allocate and free memory through the server's
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memory handling routines.
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This allows uniform memory handling and instrumentation.
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*/
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struct mysql_malloc_service_st {
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/**
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Allocates a block of memory
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@sa my_malloc
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*/
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mysql_malloc_t mysql_malloc;
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/**
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Reallocates a block of memory
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@sa my_realloc
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*/
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mysql_realloc_t mysql_realloc;
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/**
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Re-instruments a block of memory
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@sa my_claim
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*/
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mysql_claim_t mysql_claim;
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/**
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Frees a block of memory
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@sa my_free
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*/
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mysql_free_t mysql_free;
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/**
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Copies a buffer into a new buffer
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@sa my_memdup
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*/
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my_memdup_t my_memdup;
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/**
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Copies a string into a new buffer
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@sa my_strdup
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*/
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my_strdup_t my_strdup;
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/**
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Copies no more than n characters of a string into a new buffer
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@sa my_strndup
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*/
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my_strndup_t my_strndup;
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};
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extern "C" struct mysql_malloc_service_st *mysql_malloc_service;
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#ifdef MYSQL_DYNAMIC_PLUGIN
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#define my_malloc mysql_malloc_service->mysql_malloc
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#define my_realloc mysql_malloc_service->mysql_realloc
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#define my_claim mysql_malloc_service->mysql_claim
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#define my_free mysql_malloc_service->mysql_free
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#define my_memdup mysql_malloc_service->my_memdup
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#define my_strdup mysql_malloc_service->my_strdup
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#define my_strndup mysql_malloc_service->my_strndup
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#else
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extern void *my_malloc(PSI_memory_key key, size_t size, myf_t flags);
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extern void *my_realloc(PSI_memory_key key, void *ptr, size_t size,
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myf_t flags);
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extern void my_claim(const void *ptr);
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extern void my_free(void *ptr);
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extern void *my_memdup(PSI_memory_key key, const void *from, size_t length,
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myf_t flags);
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extern char *my_strdup(PSI_memory_key key, const char *from, myf_t flags);
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extern char *my_strndup(PSI_memory_key key, const char *from, size_t length,
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myf_t flags);
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#endif
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#endif
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