95 lines
2.0 KiB
C++
95 lines
2.0 KiB
C++
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/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021-04-27 flybreak the first version.
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*/
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#include "thread"
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#include "__utils.h"
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#define _RT_NPROCS 0
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namespace std
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{
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extern "C"
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{
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static void* execute_native_thread_routine(void *p)
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{
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thread::invoker_base* t = static_cast<thread::invoker_base*>(p);
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thread::invoker_base_ptr local;
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local.swap(t->this_ptr); // tranfer the ownership of the invoker into the thread entry
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local->invoke();
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return NULL;
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}
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}
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void thread::start_thread(invoker_base_ptr b)
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{
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auto raw_ptr = b.get();
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// transfer the ownership of the invoker to the new thread
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raw_ptr->this_ptr = std::move(b);
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int err = pthread_create(&_m_thr.__cpp_thread_t, NULL,
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&execute_native_thread_routine, raw_ptr);
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if (err)
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{
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raw_ptr->this_ptr.reset();
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throw_system_error(err, "Failed to create a thread");
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}
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}
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thread::~thread()
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{
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if (joinable()) // when either not joined or not detached
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terminate();
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}
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void thread::join()
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{
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int err = EINVAL;
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if (joinable())
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err = pthread_join(native_handle(), NULL);
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if (err)
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{
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throw_system_error(err, "thread::join failed");
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}
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_m_thr = id();
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}
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void thread::detach()
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{
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int err = EINVAL;
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if (joinable())
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err = pthread_detach(native_handle());
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if (err)
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{
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throw_system_error(err, "thread::detach failed");
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}
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_m_thr = id();
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}
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// TODO: not yet actually implemented.
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// The standard states that the returned value should only be considered a hint.
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unsigned thread::hardware_concurrency() noexcept
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{
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int __n = _RT_NPROCS;
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if (__n < 0)
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__n = 0;
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return __n;
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}
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}
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