diff options
Diffstat (limited to 'sql/mdl.h')
| -rw-r--r-- | sql/mdl.h | 42 |
1 files changed, 29 insertions, 13 deletions
diff --git a/sql/mdl.h b/sql/mdl.h index af7d75c1297..477f4df7807 100644 --- a/sql/mdl.h +++ b/sql/mdl.h @@ -37,6 +37,24 @@ class MDL_lock; class MDL_ticket; /** + @def ENTER_COND(C, M, S, O) + Start a wait on a condition. + @param C the condition to wait on + @param M the associated mutex + @param S the new stage to enter + @param O the previous stage + @sa EXIT_COND(). +*/ +#define ENTER_COND(C, M, S, O) enter_cond(C, M, S, O, __func__, __FILE__, __LINE__) + +/** + @def EXIT_COND(S) + End a wait on a condition + @param S the new stage to enter +*/ +#define EXIT_COND(S) exit_cond(S, __func__, __FILE__, __LINE__) + +/** Type of metadata lock request. @sa Comments for MDL_object_lock::can_grant_lock() and @@ -189,6 +207,10 @@ enum enum_mdl_duration { class MDL_key { public: +#ifdef HAVE_PSI_INTERFACE + static void init_psi_keys(); +#endif + /** Object namespaces. Sic: when adding a new member to this enum make sure to @@ -284,16 +306,16 @@ public: Get thread state name to be used in case when we have to wait on resource identified by key. */ - const char * get_wait_state_name() const + const PSI_stage_info * get_wait_state_name() const { - return m_namespace_to_wait_state_name[(int)mdl_namespace()]; + return & m_namespace_to_wait_state_name[(int)mdl_namespace()]; } private: uint16 m_length; uint16 m_db_name_length; char m_ptr[MAX_MDLKEY_LENGTH]; - static const char * m_namespace_to_wait_state_name[NAMESPACE_END]; + static PSI_stage_info m_namespace_to_wait_state_name[NAMESPACE_END]; private: MDL_key(const MDL_key &); /* not implemented */ MDL_key &operator=(const MDL_key &); /* not implemented */ @@ -592,8 +614,10 @@ public: bool set_status(enum_wait_status result_arg); enum_wait_status get_status(); void reset_status(); - enum_wait_status timed_wait(THD *thd, struct timespec *abs_timeout, - bool signal_timeout, const char *wait_state_name); + enum_wait_status timed_wait(THD *thd, + struct timespec *abs_timeout, + bool signal_timeout, + const PSI_stage_info *wait_state_name); private: /** Condvar which is used for waiting until this context's pending @@ -837,16 +861,8 @@ private: void mdl_init(); void mdl_destroy(); - -/* - Functions in the server's kernel used by metadata locking subsystem. -*/ - extern bool mysql_notify_thread_having_shared_lock(THD *thd, THD *in_use, bool needs_thr_lock_abort); -extern "C" const char* thd_enter_cond(MYSQL_THD thd, mysql_cond_t *cond, - mysql_mutex_t *mutex, const char *msg); -extern "C" void thd_exit_cond(MYSQL_THD thd, const char *old_msg); #ifndef DBUG_OFF extern mysql_mutex_t LOCK_open; |