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perfschema status vars instrumentation related changes

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This commit is contained in:
Sergei Golubchik 2020-02-14 17:02:08 +01:00
commit 7ce517c951
2 changed files with 12 additions and 1 deletions
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12
sql/sql_show.cc
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@ -3307,8 +3307,9 @@ int fill_schema_processlist(THD* thd, TABLE_LIST* tables, COND* cond)
Status functions
*****************************************************************************/
static DYNAMIC_ARRAY all_status_vars;
DYNAMIC_ARRAY all_status_vars;
static bool status_vars_inited= 0;
ulonglong status_var_array_version= 0;
C_MODE_START
static int show_var_cmp(const void *var1, const void *var2)
@ -3336,6 +3337,7 @@ static void shrink_var_array(DYNAMIC_ARRAY *array)
}
else // array is completely empty - delete it
delete_dynamic(array);
status_var_array_version++;
}
/*
@ -3375,6 +3377,7 @@ int add_status_vars(SHOW_VAR *list)
all_status_vars.elements--; // but next insert_dynamic should overwite it
if (status_vars_inited)
sort_dynamic(&all_status_vars, show_var_cmp);
status_var_array_version++;
err:
if (status_vars_inited)
mysql_rwlock_unlock(&LOCK_all_status_vars);
@ -3393,6 +3396,7 @@ void init_status_vars()
{
status_vars_inited=1;
sort_dynamic(&all_status_vars, show_var_cmp);
status_var_array_version++;
}
void reset_status_vars()
@ -3419,6 +3423,7 @@ void reset_status_vars()
void free_status_vars()
{
delete_dynamic(&all_status_vars);
status_var_array_version++;
}
/*
@ -3480,6 +3485,11 @@ void remove_status_vars(SHOW_VAR *list)
}
}
/* Current version of the all_status_vars. */
ulonglong get_status_vars_version(void)
{
return status_var_array_version;
}
/**
@brief Returns the value of a system or a status variable.

1
sql/sql_show.h
View file

@ -119,6 +119,7 @@ bool append_definer(THD *thd, String *buffer, const LEX_CSTRING *definer_user,
const LEX_CSTRING *definer_host);
int add_status_vars(SHOW_VAR *list);
void remove_status_vars(SHOW_VAR *list);
ulonglong get_status_vars_version(void);
void init_status_vars();
void free_status_vars();
void reset_status_vars();