159 lines
4.2 KiB
C++
159 lines
4.2 KiB
C++
/*
|
|
Portions Copyright (c) 2020, Alibaba Group Holding Limited
|
|
Portions Copyright (c) 2015-Present, Facebook, Inc.
|
|
Portions Copyright (c) 2012, Monty Program Ab
|
|
|
|
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, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
|
|
#pragma once
|
|
|
|
/* C++ standard header files */
|
|
#include <string>
|
|
|
|
/* MySQL includes */
|
|
//#include "./my_global.h"
|
|
#include <mysql/psi/mysql_thread.h>
|
|
#include <mysql/psi/mysql_table.h>
|
|
#include <mysql/thread_pool_priv.h>
|
|
|
|
/* MyX header files */
|
|
#include "./xdb_utils.h"
|
|
|
|
namespace myx {
|
|
|
|
class Xdb_thread {
|
|
private:
|
|
// Disable Copying
|
|
Xdb_thread(const Xdb_thread &);
|
|
Xdb_thread &operator=(const Xdb_thread &);
|
|
|
|
// Make sure we run only once
|
|
std::atomic_bool m_run_once;
|
|
|
|
my_thread_handle m_handle;
|
|
|
|
std::string m_name;
|
|
|
|
protected:
|
|
mysql_mutex_t m_signal_mutex;
|
|
mysql_cond_t m_signal_cond;
|
|
bool m_stop = false;
|
|
|
|
public:
|
|
Xdb_thread() : m_run_once(false) {}
|
|
|
|
#ifdef HAVE_PSI_INTERFACE
|
|
void init(my_core::PSI_mutex_key stop_bg_psi_mutex_key,
|
|
my_core::PSI_cond_key stop_bg_psi_cond_key);
|
|
int create_thread(const std::string &thread_name,
|
|
my_core::PSI_thread_key background_psi_thread_key);
|
|
#else
|
|
void init();
|
|
int create_thread(const std::string &thread_name);
|
|
#endif
|
|
|
|
virtual void run(void) = 0;
|
|
|
|
void signal(const bool &stop_thread = false);
|
|
|
|
int join() { return pthread_join(m_handle.thread, nullptr); }
|
|
|
|
void setname() {
|
|
/*
|
|
mysql_thread_create() ends up doing some work underneath and setting the
|
|
thread name as "my-func". This isn't what we want. Our intent is to name
|
|
the threads according to their purpose so that when displayed under the
|
|
debugger then they'll be more easily identifiable. Therefore we'll reset
|
|
the name if thread was successfully created.
|
|
*/
|
|
|
|
/*
|
|
We originally had the creator also set the thread name, but that seems to
|
|
not work correctly in all situations. Having the created thread do the
|
|
pthread_setname_np resolves the issue.
|
|
*/
|
|
DBUG_ASSERT(!m_name.empty());
|
|
int err = pthread_setname_np(m_handle.thread, m_name.c_str());
|
|
if (err)
|
|
{
|
|
// NO_LINT_DEBUG
|
|
sql_print_warning(
|
|
"XEngine: Failed to set name (%s) for current thread, errno=%d",
|
|
m_name.c_str(), errno);
|
|
}
|
|
}
|
|
|
|
void uninit();
|
|
|
|
virtual ~Xdb_thread() {}
|
|
|
|
private:
|
|
static void *thread_func(void *const thread_ptr);
|
|
};
|
|
|
|
/**
|
|
MyX background thread control
|
|
N.B. This is on top of XENGINE's own background threads
|
|
(@see xengine::common::CancelAllBackgroundWork())
|
|
*/
|
|
|
|
class Xdb_background_thread : public Xdb_thread {
|
|
private:
|
|
bool m_save_stats = false;
|
|
int32_t counter_ = 0;
|
|
std::string backup_snapshot_file_;
|
|
|
|
void reset() {
|
|
mysql_mutex_assert_owner(&m_signal_mutex);
|
|
m_stop = false;
|
|
m_save_stats = false;
|
|
}
|
|
|
|
public:
|
|
virtual void run() override;
|
|
|
|
void request_save_stats() {
|
|
XDB_MUTEX_LOCK_CHECK(m_signal_mutex);
|
|
|
|
m_save_stats = true;
|
|
|
|
XDB_MUTEX_UNLOCK_CHECK(m_signal_mutex);
|
|
}
|
|
|
|
void set_snapshot_counter(int32_t counter) {
|
|
XDB_MUTEX_LOCK_CHECK(m_signal_mutex);
|
|
counter_ = counter;
|
|
XDB_MUTEX_UNLOCK_CHECK(m_signal_mutex);
|
|
}
|
|
|
|
void set_backup_snapshot_hold_file(std::string &path) {
|
|
backup_snapshot_file_ = path;
|
|
}
|
|
};
|
|
|
|
/*
|
|
Drop index thread control
|
|
*/
|
|
|
|
struct Xdb_drop_index_thread : public Xdb_thread {
|
|
virtual void run() override;
|
|
// shrink extent space cann't do with the drop index
|
|
bool is_run() { return m_run_; }
|
|
void enter_race_condition() { XDB_MUTEX_LOCK_CHECK(m_signal_mutex); }
|
|
void exit_race_condition() { XDB_MUTEX_UNLOCK_CHECK(m_signal_mutex); }
|
|
private:
|
|
bool m_run_;
|
|
};
|
|
|
|
} // namespace myx
|