MySQL  8.0.27
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psi_mdl_bits.h
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22 
23 #ifndef COMPONENTS_SERVICES_PSI_MDL_BITS_H
24 #define COMPONENTS_SERVICES_PSI_MDL_BITS_H
25 
26 /**
27  @file
28  Performance schema instrumentation interface.
29 
30  @defgroup psi_abi_mdl Metadata Lock Instrumentation (ABI)
31  @ingroup psi_abi
32  @{
33 */
34 
35 struct MDL_key;
36 
37 /** @sa enum_mdl_type. */
38 typedef int opaque_mdl_type;
39 
40 /** @sa enum_mdl_duration. */
41 typedef int opaque_mdl_duration;
42 
43 /** @sa MDL_wait::enum_wait_status. */
44 typedef int opaque_mdl_status;
45 
46 /**
47  Interface for an instrumented metadata lock.
48  This is an opaque structure.
49 */
50 struct PSI_metadata_lock;
52 
53 /**
54  Interface for an instrumented MDL operation.
55  This is an opaque structure.
56 */
57 struct PSI_metadata_locker;
59 
60 /**
61  State data storage for @c start_metadata_wait_v1_t.
62  This structure provide temporary storage to a metadata locker.
63  The content of this structure is considered opaque,
64  the fields are only hints of what an implementation
65  of the psi interface can use.
66  This memory is provided by the instrumented code for performance reasons.
67  @sa start_metadata_wait_v1_t
68 */
70  /** Internal state. */
71  unsigned int m_flags;
72  /** Current metadata lock. */
74  /** Current thread. */
76  /** Timer start. */
77  unsigned long long m_timer_start;
78  /** Timer function. */
79  unsigned long long (*m_timer)(void);
80  /** Internal data. */
81  void *m_wait;
82 };
84 
85 typedef PSI_metadata_lock *(*create_metadata_lock_v1_t)(
86  void *identity, const struct MDL_key *key, opaque_mdl_type mdl_type,
87  opaque_mdl_duration mdl_duration, opaque_mdl_status mdl_status,
88  const char *src_file, unsigned int src_line);
89 
91  opaque_mdl_status mdl_status);
92 
95 
97 
98 typedef struct PSI_metadata_locker *(*start_metadata_wait_v1_t)(
99  struct PSI_metadata_locker_state_v1 *state, struct PSI_metadata_lock *mdl,
100  const char *src_file, unsigned int src_line);
101 
102 typedef void (*end_metadata_wait_v1_t)(struct PSI_metadata_locker *locker,
103  int rc);
104 
106 
107 /** @} (end of group psi_abi_mdl) */
108 
109 #endif /* COMPONENTS_SERVICES_PSI_MDL_BITS_H */
void(* destroy_metadata_lock_v1_t)(PSI_metadata_lock *lock)
Definition: psi_mdl_bits.h:96
void(* end_metadata_wait_v1_t)(struct PSI_metadata_locker *locker, int rc)
Definition: psi_mdl_bits.h:102
int opaque_mdl_duration
Definition: psi_mdl_bits.h:41
struct PSI_metadata_locker PSI_metadata_locker
Definition: psi_mdl_bits.h:58
int opaque_mdl_status
Definition: psi_mdl_bits.h:44
int opaque_mdl_type
Definition: psi_mdl_bits.h:35
void(* set_metadata_lock_status_v1_t)(PSI_metadata_lock *lock, opaque_mdl_status mdl_status)
Definition: psi_mdl_bits.h:90
struct PSI_metadata_lock PSI_metadata_lock
Definition: psi_mdl_bits.h:51
void(* set_metadata_lock_duration_v2_t)(PSI_metadata_lock *lock, opaque_mdl_duration mdl_duration)
Definition: psi_mdl_bits.h:93
struct PSI_thread PSI_thread
Definition: psi_thread_bits.h:81
static std::mutex lock
Definition: net_ns.cc:55
required string key
Definition: replication_asynchronous_connection_failover.proto:59
Metadata lock object key.
Definition: mdl.h:364
State data storage for start_metadata_wait_v1_t.
Definition: psi_mdl_bits.h:69
struct PSI_metadata_lock * m_metadata_lock
Current metadata lock.
Definition: psi_mdl_bits.h:73
struct PSI_thread * m_thread
Current thread.
Definition: psi_mdl_bits.h:75
unsigned long long(* m_timer)(void)
Timer function.
Definition: psi_mdl_bits.h:79
unsigned int m_flags
Internal state.
Definition: psi_mdl_bits.h:71
unsigned long long m_timer_start
Timer start.
Definition: psi_mdl_bits.h:77
void * m_wait
Internal data.
Definition: psi_mdl_bits.h:81