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/* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */
/**
@file storage/perfschema/pfs_server.cc
Private interface for the server (implementation).
*/
#include "my_global.h"
#include "my_sys.h"
#include "mysys_err.h"
#include "pfs_server.h"
#include "pfs.h"
#include "pfs_global.h"
#include "pfs_instr_class.h"
#include "pfs_instr.h"
#include "pfs_events_waits.h"
#include "pfs_timer.h"
PFS_global_param pfs_param;
C_MODE_START
static void destroy_pfs_thread(void *key);
C_MODE_END
static void cleanup_performance_schema(void);
struct PSI_bootstrap*
initialize_performance_schema(const PFS_global_param *param)
{
pfs_initialized= false;
if (! param->m_enabled)
{
/*
The performance schema is disabled in the startup command line.
All the instrumentation is turned off.
*/
return NULL;
}
init_timers();
PFS_atomic::init();
if (pthread_key_create(&THR_PFS, destroy_pfs_thread))
return NULL;
THR_PFS_initialized= true;
if (init_sync_class(param->m_mutex_class_sizing,
param->m_rwlock_class_sizing,
param->m_cond_class_sizing) ||
init_thread_class(param->m_thread_class_sizing) ||
init_table_share(param->m_table_share_sizing) ||
init_file_class(param->m_file_class_sizing) ||
init_instruments(param) ||
init_events_waits_history_long(
param->m_events_waits_history_long_sizing) ||
init_file_hash() ||
init_table_share_hash())
{
/*
The performance schema initialization failed.
Free the memory used, and disable the instrumentation.
*/
cleanup_performance_schema();
return NULL;
}
pfs_initialized= true;
return &PFS_bootstrap;
}
static void destroy_pfs_thread(void *key)
{
PFS_thread* pfs= reinterpret_cast<PFS_thread*> (key);
DBUG_ASSERT(pfs);
/*
This automatic cleanup is a last resort and best effort to avoid leaks,
and may not work on windows due to the implementation of pthread_key_create().
Please either use:
- my_thread_end()
- or PSI_server->delete_current_thread()
in the instrumented code, to explicitly cleanup the instrumentation.
Avoid invalid writes when the main() thread completes after shutdown:
the memory pointed by pfs is already released.
*/
if (pfs_initialized)
destroy_thread(pfs);
}
static void cleanup_performance_schema(void)
{
cleanup_instruments();
cleanup_sync_class();
cleanup_thread_class();
cleanup_table_share();
cleanup_file_class();
cleanup_events_waits_history_long();
cleanup_table_share_hash();
cleanup_file_hash();
PFS_atomic::cleanup();
}
void shutdown_performance_schema(void)
{
pfs_initialized= false;
cleanup_performance_schema();
/*
Be careful to not delete un-initialized keys,
this would affect key 0, which is THR_KEY_mysys,
*/
if (THR_PFS_initialized)
{
my_pthread_setspecific_ptr(THR_PFS, NULL);
pthread_key_delete(THR_PFS);
THR_PFS_initialized= false;
}
}
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