185 lines
3.3 KiB
C++
185 lines
3.3 KiB
C++
/*
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* Copyright (c) 2016 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
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*
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* Change Date: 2022-01-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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#include <maxscale/thread.h>
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#include <maxscale/thread.hh>
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#include <maxscale/log_manager.h>
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THREAD *thread_start(THREAD *thd, void (*entry)(void *), void *arg, size_t stack_size)
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{
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THREAD* rv = NULL;
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pthread_attr_t attr;
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int error = pthread_attr_init(&attr);
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if (error == 0)
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{
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if (stack_size != 0)
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{
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error = pthread_attr_setstacksize(&attr, stack_size);
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}
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if (error == 0)
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{
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error = pthread_create(thd, &attr, (void *(*)(void *))entry, arg);
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if (error == 0)
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{
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rv = thd;
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}
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else
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{
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MXS_ERROR("Could not start thread: %s", mxs_strerror(error));
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}
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}
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else
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{
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MXS_ERROR("Could not set thread stack size to %lu: %s", stack_size, mxs_strerror(error));
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}
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}
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else
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{
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MXS_ERROR("Could not initialize thread attributes: %s", mxs_strerror(error));
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}
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return rv;
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}
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void thread_wait(THREAD thd)
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{
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void *rval;
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pthread_join((pthread_t)thd, &rval);
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}
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void thread_millisleep(int ms)
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{
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struct timespec req;
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req.tv_sec = ms / 1000;
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req.tv_nsec = (ms % 1000) * 1000000;
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nanosleep(&req, NULL);
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}
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//
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// maxscale::thread
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//
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namespace maxscale
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{
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thread::thread()
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: m_pInternal(NULL)
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{
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}
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thread::thread(const thread& other)
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: m_pInternal(other.m_pInternal)
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{
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other.m_pInternal = NULL;
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}
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thread& thread::operator = (const thread& rhs)
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{
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thread copy(rhs);
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copy.swap(*this);
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return *this;
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}
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thread::~thread()
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{
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ss_dassert(!joinable());
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if (joinable())
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{
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MXS_ERROR("A thread that has not been joined is destructed.");
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}
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else
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{
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delete m_pInternal;
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}
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}
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bool thread::joinable() const
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{
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return m_pInternal ? m_pInternal->joinable() : false;
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}
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void thread::join()
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{
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ss_dassert(m_pInternal);
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if (!m_pInternal)
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{
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MXS_ERROR("Attempt to join a non-joinable thread.");
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}
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else
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{
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m_pInternal->join();
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}
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}
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void thread::swap(thread& rhs)
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{
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std::swap(m_pInternal, rhs.m_pInternal);
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}
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void thread::run()
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{
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ss_dassert(m_pInternal);
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m_pInternal->run();
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}
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thread::internal::internal(thread::task* pTask)
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: m_pTask(pTask)
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, m_thread(0)
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{
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}
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thread::internal::~internal()
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{
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ss_info_dassert(!m_pTask, "Thread not joined before destructed.");
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ss_dassert(m_thread == 0);
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}
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bool thread::internal::joinable() const
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{
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return m_thread != 0;
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}
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void thread::internal::join()
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{
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ss_dassert(joinable());
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thread_wait(m_thread);
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delete m_pTask;
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m_pTask = NULL;
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m_thread = 0;
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}
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void thread::internal::run()
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{
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if (!thread_start(&m_thread, &thread::internal::main, this, 0))
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{
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MXS_ALERT("Could not start thread, MaxScale is likely to malfunction.");
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}
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}
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void thread::internal::main()
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{
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m_pTask->run();
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}
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void thread::internal::main(void* pArg)
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{
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static_cast<internal*>(pArg)->main();
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}
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}
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