MySQL 8.0.30
Source Code Documentation
psi_memory_bits.h
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22
23#ifndef COMPONENTS_SERVICES_BITS_PSI_MEMORY_BITS_H
24#define COMPONENTS_SERVICES_BITS_PSI_MEMORY_BITS_H
25
26#ifndef MYSQL_ABI_CHECK
27#include <stddef.h> /* size_t */
28#endif
29
31
32/**
33 @file mysql/components/services/bits/psi_memory_bits.h
34 Performance schema instrumentation interface.
35*/
36
37/**
38 @defgroup psi_abi_memory Memory Instrumentation (ABI)
39 @ingroup psi_abi
40 @{
41*/
42
43/**
44 Instrumented memory key.
45 To instrument memory, a memory key must be obtained using @c register_memory.
46 Using a zero key always disable the instrumentation.
47*/
48typedef unsigned int PSI_memory_key;
49
50struct PSI_thread;
51
52/**
53 Memory instrument information.
54 @since PSI_MEMORY_VERSION_1
55 This structure is used to register instrumented memory.
56*/
58 /** Pointer to the key assigned to the registered memory. */
60 /** The name of the memory instrument to register. */
61 const char *m_name;
62 /**
63 The flags of the memory instrument to register.
64 @sa PSI_FLAG_ONLY_GLOBAL_STAT
65 */
66 unsigned int m_flags;
67 /** Volatility index. */
69 /** Documentation. */
70 const char *m_documentation;
71};
73
74/**
75 Memory registration API.
76 @param category a category name (typically a plugin name)
77 @param info an array of memory info to register
78 @param count the size of the info array
79*/
80typedef void (*register_memory_v1_t)(const char *category,
82 int count);
83
84/**
85 Instrument memory allocation.
86 @param key the memory instrument key
87 @param size the size of memory allocated
88 @param[out] owner the memory owner
89 @return the effective memory instrument key
90*/
92 struct PSI_thread **owner);
93
94/**
95 Instrument memory re allocation.
96 @param key the memory instrument key
97 @param old_size the size of memory previously allocated
98 @param new_size the size of memory re allocated
99 @param[in, out] owner the memory owner
100 @return the effective memory instrument key
101*/
103 size_t old_size, size_t new_size,
104 struct PSI_thread **owner);
105
106/**
107 Instrument memory claim.
108 @param key the memory instrument key
109 @param size the size of memory allocated
110 @param[in, out] owner the memory owner
111 @return the effective memory instrument key
112*/
114 struct PSI_thread **owner);
115
116/**
117 Instrument memory claim.
118 @param key the memory instrument key
119 @param size the size of memory allocated
120 @param[in, out] owner the memory owner
121 @param claim True to claim, false to unclaim
122 @return the effective memory instrument key
123*/
125 struct PSI_thread **owner,
126 bool claim);
127
128/**
129 Instrument memory free.
130 @param key the memory instrument key
131 @param size the size of memory allocated
132 @param owner the memory owner
133*/
134typedef void (*memory_free_v1_t)(PSI_memory_key key, size_t size,
135 struct PSI_thread *owner);
136
138
139/** @} (end of group psi_abi_memory) */
140
141#endif /* COMPONENTS_SERVICES_BITS_PSI_MEMORY_BITS_H */
PSI_memory_key(* memory_claim_v2_t)(PSI_memory_key key, size_t size, struct PSI_thread **owner, bool claim)
Instrument memory claim.
Definition: psi_memory_bits.h:124
PSI_memory_key(* memory_realloc_v1_t)(PSI_memory_key key, size_t old_size, size_t new_size, struct PSI_thread **owner)
Instrument memory re allocation.
Definition: psi_memory_bits.h:102
PSI_memory_key(* memory_alloc_v1_t)(PSI_memory_key key, size_t size, struct PSI_thread **owner)
Instrument memory allocation.
Definition: psi_memory_bits.h:91
void(* register_memory_v1_t)(const char *category, struct PSI_memory_info_v1 *info, int count)
Memory registration API.
Definition: psi_memory_bits.h:80
unsigned int PSI_memory_key
Instrumented memory key.
Definition: psi_memory_bits.h:48
PSI_memory_key(* memory_claim_v1_t)(PSI_memory_key key, size_t size, struct PSI_thread **owner)
Instrument memory claim.
Definition: psi_memory_bits.h:113
void(* memory_free_v1_t)(PSI_memory_key key, size_t size, struct PSI_thread *owner)
Instrument memory free.
Definition: psi_memory_bits.h:134
struct PSI_thread PSI_thread
Definition: psi_thread_bits.h:81
static int count
Definition: myisam_ftdump.cc:42
Log info(cout, "NOTE")
static const char * category
Definition: sha2_password.cc:168
Performance schema instrumentation interface.
required string key
Definition: replication_asynchronous_connection_failover.proto:59
Memory instrument information.
Definition: psi_memory_bits.h:57
PSI_memory_key * m_key
Pointer to the key assigned to the registered memory.
Definition: psi_memory_bits.h:59
const char * m_name
The name of the memory instrument to register.
Definition: psi_memory_bits.h:61
unsigned int m_flags
The flags of the memory instrument to register.
Definition: psi_memory_bits.h:66
const char * m_documentation
Documentation.
Definition: psi_memory_bits.h:70
int m_volatility
Volatility index.
Definition: psi_memory_bits.h:68