96 lines
2.5 KiB
C++
96 lines
2.5 KiB
C++
/* Copyright (c) 2009, 2015, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#ifndef SQL_THREAD_INCLUDED
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#define SQL_THREAD_INCLUDED
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#include <my_global.h>
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#include <mysql/psi/mysql_thread.h>
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namespace thread {
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/*
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An abstract class for creating/running/joining threads.
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Thread::start() will create a new pthread, and execute the run() function.
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*/
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class Thread
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{
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public:
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Thread()
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{}
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virtual ~Thread()
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{}
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/*
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Will create a new pthread, and invoke run();
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Returns the value from my_thread_create().
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*/
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int start();
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/*
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You may invoke this to wait for the thread to finish.
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You should probalbly join() a thread before deleting it.
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*/
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void join();
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// The handle of the thread (valid only if it is actually running).
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my_thread_handle thread_handle() const { return m_thread_handle; }
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/*
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A wrapper for the run() function.
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Users should *not* call this function directly, they should rather
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invoke the start() function.
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*/
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static void run_wrapper(Thread*);
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protected:
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/*
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Define this function in derived classes.
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Users should *not* call this function directly, they should rather
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invoke the start() function.
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*/
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virtual void run() = 0;
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private:
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my_thread_handle m_thread_handle;
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Thread(const Thread&); /* Not copyable. */
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void operator=(const Thread&); /* Not assignable. */
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};
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// A barrier which can be used for one-time synchronization between threads.
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class Notification
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{
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public:
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Notification();
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~Notification();
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bool has_been_notified();
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void wait_for_notification();
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void notify();
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private:
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bool m_notified;
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mysql_cond_t m_cond;
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mysql_mutex_t m_mutex;
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Notification(const Notification&); /* Not copyable. */
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void operator=(const Notification&); /* Not assignable. */
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};
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} // namespace thread
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#endif // SQL_THREAD_INCLUDED
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