MySQL 8.4.3
Source Code Documentation
service_mysql_alloc.h
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1/* Copyright (c) 2012, 2024, Oracle and/or its affiliates.
2
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4 it under the terms of the GNU General Public License, version 2.0,
5 as published by the Free Software Foundation.
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7 This program is designed to work with certain software (including
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9 as designated in a particular file or component or in included license
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12 separately licensed software that they have either included with
13 the program or referenced in the documentation.
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15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License, version 2.0, for more details.
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20 You should have received a copy of the GNU General Public License
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22 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
23
24#ifndef MYSQL_SERVICE_MYSQL_ALLOC_INCLUDED
25#define MYSQL_SERVICE_MYSQL_ALLOC_INCLUDED
26
27/**
28 @file include/mysql/service_mysql_alloc.h
29*/
30
31#ifndef MYSQL_ABI_CHECK
32#include <stdlib.h>
33#endif
34
35/* PSI_memory_key */
37
38/* myf */
39typedef int myf_t;
40
41typedef void *(*mysql_malloc_t)(PSI_memory_key key, size_t size, myf_t flags);
42typedef void *(*mysql_realloc_t)(PSI_memory_key key, void *ptr, size_t size,
43 myf_t flags);
44typedef void (*mysql_claim_t)(const void *ptr, bool claim);
45typedef void (*mysql_free_t)(void *ptr);
46typedef void *(*my_memdup_t)(PSI_memory_key key, const void *from,
47 size_t length, myf_t flags);
48typedef char *(*my_strdup_t)(PSI_memory_key key, const char *from, myf_t flags);
49typedef char *(*my_strndup_t)(PSI_memory_key key, const char *from,
50 size_t length, myf_t flags);
51
52/**
53 @ingroup group_ext_plugin_services
54
55 This service allows plugins to allocate and free memory through the server's
56 memory handling routines.
57 This allows uniform memory handling and instrumentation.
58*/
60 /**
61 Allocates a block of memory
62
63 @sa my_malloc
64 */
66 /**
67 Reallocates a block of memory
68
69 @sa my_realloc
70 */
72 /**
73 Re-instruments a block of memory
74
75 @sa my_claim
76 */
78 /**
79 Frees a block of memory
80
81 @sa my_free
82 */
84 /**
85 Copies a buffer into a new buffer
86
87 @sa my_memdup
88 */
90 /**
91 Copies a string into a new buffer
92
93 @sa my_strdup
94 */
96 /**
97 Copies no more than n characters of a string into a new buffer
98
99 @sa my_strndup
100 */
102};
103
105
106#ifdef MYSQL_DYNAMIC_PLUGIN
107
108#define my_malloc mysql_malloc_service->mysql_malloc
109#define my_realloc mysql_malloc_service->mysql_realloc
110#define my_claim mysql_malloc_service->mysql_claim
111#define my_free mysql_malloc_service->mysql_free
112#define my_memdup mysql_malloc_service->my_memdup
113#define my_strdup mysql_malloc_service->my_strdup
114#define my_strndup mysql_malloc_service->my_strndup
115
116#else
117
118extern void *my_malloc(PSI_memory_key key, size_t size, myf_t flags);
119extern void *my_realloc(PSI_memory_key key, void *ptr, size_t size,
120 myf_t flags);
121extern void my_claim(const void *ptr, bool claim);
122extern void my_free(void *ptr);
123extern void *my_memdup(PSI_memory_key key, const void *from, size_t length,
124 myf_t flags);
125extern char *my_strdup(PSI_memory_key key, const char *from, myf_t flags);
126extern char *my_strndup(PSI_memory_key key, const char *from, size_t length,
127 myf_t flags);
128
129#ifdef _WIN32
130extern void *my_std_malloc(PSI_memory_key key, size_t size, myf_t flags);
131extern void *my_std_realloc(PSI_memory_key key, void *ptr, size_t size,
132 myf_t flags);
133extern void my_std_free(void *ptr);
134
135#endif // _WIN32
136
137#endif
138
139#endif
unsigned int PSI_memory_key
Instrumented memory key.
Definition: psi_memory_bits.h:49
static int flags[50]
Definition: hp_test1.cc:40
void * my_std_malloc(PSI_memory_key key, size_t size, myf flags)
Definition: my_malloc.cc:390
void my_std_free(void *ptr)
Definition: my_malloc.cc:471
void * my_std_realloc(PSI_memory_key key, void *ptr, size_t size, myf flags)
Definition: my_malloc.cc:454
bool length(const dd::Spatial_reference_system *srs, const Geometry *g1, double *length, bool *null) noexcept
Computes the length of linestrings and multilinestrings.
Definition: length.cc:76
size_t size(const char *const c)
Definition: base64.h:46
Performance schema instrumentation interface.
required string key
Definition: replication_asynchronous_connection_failover.proto:60
char *(* my_strdup_t)(PSI_memory_key key, const char *from, myf_t flags)
Definition: service_mysql_alloc.h:48
char * my_strdup(PSI_memory_key key, const char *from, myf_t flags)
Definition: my_malloc.cc:548
void * my_memdup(PSI_memory_key key, const void *from, size_t length, myf_t flags)
Definition: my_malloc.cc:540
void my_free(void *ptr)
Frees the memory pointed by the ptr.
Definition: my_memory.cc:81
void(* mysql_free_t)(void *ptr)
Definition: service_mysql_alloc.h:45
struct mysql_malloc_service_st * mysql_malloc_service
Definition: service_mysql_alloc.h:104
void(* mysql_claim_t)(const void *ptr, bool claim)
Definition: service_mysql_alloc.h:44
void *(* mysql_malloc_t)(PSI_memory_key key, size_t size, myf_t flags)
Definition: service_mysql_alloc.h:41
void * my_malloc(PSI_memory_key key, size_t size, myf_t flags)
Allocates size bytes of memory.
Definition: my_memory.cc:57
void my_claim(const void *ptr, bool claim)
Definition: my_malloc.cc:458
int myf_t
Definition: service_mysql_alloc.h:39
void *(* mysql_realloc_t)(PSI_memory_key key, void *ptr, size_t size, myf_t flags)
Definition: service_mysql_alloc.h:42
char * my_strndup(PSI_memory_key key, const char *from, size_t length, myf_t flags)
Definition: my_malloc.cc:556
void *(* my_memdup_t)(PSI_memory_key key, const void *from, size_t length, myf_t flags)
Definition: service_mysql_alloc.h:46
char *(* my_strndup_t)(PSI_memory_key key, const char *from, size_t length, myf_t flags)
Definition: service_mysql_alloc.h:49
void * my_realloc(PSI_memory_key key, void *ptr, size_t size, myf_t flags)
Definition: my_malloc.cc:449
This service allows plugins to allocate and free memory through the server's memory handling routines...
Definition: service_mysql_alloc.h:59
mysql_realloc_t mysql_realloc
Reallocates a block of memory.
Definition: service_mysql_alloc.h:71
my_memdup_t my_memdup
Copies a buffer into a new buffer.
Definition: service_mysql_alloc.h:89
my_strndup_t my_strndup
Copies no more than n characters of a string into a new buffer.
Definition: service_mysql_alloc.h:101
my_strdup_t my_strdup
Copies a string into a new buffer.
Definition: service_mysql_alloc.h:95
mysql_free_t mysql_free
Frees a block of memory.
Definition: service_mysql_alloc.h:83
mysql_malloc_t mysql_malloc
Allocates a block of memory.
Definition: service_mysql_alloc.h:65
mysql_claim_t mysql_claim
Re-instruments a block of memory.
Definition: service_mysql_alloc.h:77