database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-30 16:24:05 +03:00
Code Activity

WL#5363: Thread Pool Service Interface

Browse Source 
In order to allow thread schedulers to be dynamically loaded,
it is necessary to make the following changes to the server:

- Two new service interfaces

- Modifications to InnoDB to inform the thread scheduler of state changes.

- Changes to the VIO subsystem for checking if data is available on a socket.

- Elimination of remains of the old thread pool implementation.

The two new service interfaces introduces are:

my_thread_scheduler
  A service interface to register a thread
  scheduler.

thd_wait
  A service interface to inform thread scheduler
  that the thread is about to start waiting.

In addition, the patch adds code that:

- Add a call to thd_wait for table locks in mysys
  thd_lock.c by introducing a set function that
  can be used to set a callback to be used when
  waiting on a lock and resuming from waiting.

- Calling the mysys set function from the server
  to set the callbacks correctly.
This commit is contained in:
Mats Kindahl
2010-06-07 16:01:39 +02:00
parent 0c8c4a7133
commit b1dcf448ea
37 changed files with 647 additions and 129 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
sql/sql_connect.cc
View File

@ -35,6 +35,7 @@
#include "hostname.h" // inc_host_errors, ip_to_hostname,
// reset_host_errors
#include "sql_acl.h" // acl_getroot, NO_ACCESS, SUPER_ACL
#include "sql_callback.h"
#if defined(HAVE_OPENSSL) && !defined(EMBEDDED_LIBRARY)
/*
@ -958,7 +959,7 @@ bool setup_connection_thread_globals(THD *thd)
{
close_connection(thd, ER_OUT_OF_RESOURCES, 1);
statistic_increment(aborted_connects,&LOCK_status);
thread_scheduler.end_thread(thd, 0);
MYSQL_CALLBACK(thread_scheduler, end_thread, (thd, 0));
return 1; // Error
}
return 0;
@ -981,7 +982,7 @@ bool setup_connection_thread_globals(THD *thd)
*/
static bool login_connection(THD *thd)
bool login_connection(THD *thd)
{
NET *net= &thd->net;
int error;
@ -1019,7 +1020,7 @@ static bool login_connection(THD *thd)
This mainly updates status variables
*/
static void end_connection(THD *thd)
void end_connection(THD *thd)
{
NET *net= &thd->net;
plugin_thdvar_cleanup(thd);
@ -1060,7 +1061,7 @@ static void end_connection(THD *thd)
Initialize THD to handle queries
*/
static void prepare_new_connection_state(THD* thd)
void prepare_new_connection_state(THD* thd)
{
Security_context *sctx= thd->security_ctx;
@ -1134,11 +1135,11 @@ void do_handle_one_connection(THD *thd_arg)
thd->thr_create_utime= my_micro_time();
if (thread_scheduler.init_new_connection_thread())
if (MYSQL_CALLBACK_ELSE(thread_scheduler, init_new_connection_thread, (), 0))
{
close_connection(thd, ER_OUT_OF_RESOURCES, 1);
statistic_increment(aborted_connects,&LOCK_status);
thread_scheduler.end_thread(thd,0);
MYSQL_CALLBACK(thread_scheduler, end_thread, (thd, 0));
return;
}
@ -1192,7 +1193,7 @@ void do_handle_one_connection(THD *thd_arg)
end_thread:
close_connection(thd, 0, 1);
if (thread_scheduler.end_thread(thd,1))
if (MYSQL_CALLBACK_ELSE(thread_scheduler, end_thread, (thd, 1), 0))
return; // Probably no-threads
/*