117 lines
3.7 KiB
C++
117 lines
3.7 KiB
C++
#ifndef OSMIUM_THREAD_UTIL_HPP
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#define OSMIUM_THREAD_UTIL_HPP
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/*
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This file is part of Osmium (http://osmcode.org/libosmium).
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Copyright 2013-2016 Jochen Topf <jochen@topf.org> and others (see README).
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Boost Software License - Version 1.0 - August 17th, 2003
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Permission is hereby granted, free of charge, to any person or organization
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obtaining a copy of the software and accompanying documentation covered by
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this license (the "Software") to use, reproduce, display, distribute,
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execute, and transmit the Software, and to prepare derivative works of the
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Software, and to permit third-parties to whom the Software is furnished to
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do so, all subject to the following:
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The copyright notices in the Software and this entire statement, including
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the above license grant, this restriction and the following disclaimer,
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must be included in all copies of the Software, in whole or in part, and
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all derivative works of the Software, unless such copies or derivative
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works are solely in the form of machine-executable object code generated by
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a source language processor.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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*/
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#include <chrono>
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#include <future>
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#ifdef __linux__
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# include <sys/prctl.h>
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#endif
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namespace osmium {
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namespace thread {
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/**
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* Check if the future resulted in an exception. This will re-throw
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* the exception stored in the future if there was one. Otherwise it
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* will just return.
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*/
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template <typename T>
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inline void check_for_exception(std::future<T>& future) {
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if (future.valid() && future.wait_for(std::chrono::seconds(0)) == std::future_status::ready) {
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future.get();
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}
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}
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/**
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* Wait until the given future becomes ready. Will block if the future
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* is not ready. Can be called more than once unlike future.get().
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*/
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template <typename T>
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inline void wait_until_done(std::future<T>& future) {
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if (future.valid()) {
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future.get();
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}
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}
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/**
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* Set name of current thread for debugging. This only works on Linux.
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*/
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#ifdef __linux__
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inline void set_thread_name(const char* name) noexcept {
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prctl(PR_SET_NAME, name, 0, 0, 0);
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}
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#else
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inline void set_thread_name(const char*) noexcept {
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// intentionally left blank
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}
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#endif
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class thread_handler {
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std::thread m_thread;
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public:
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thread_handler() :
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m_thread() {
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}
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template <typename TFunction, typename... TArgs>
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explicit thread_handler(TFunction&& f, TArgs&&... args) :
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m_thread(std::forward<TFunction>(f), std::forward<TArgs>(args)...) {
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}
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thread_handler(const thread_handler&) = delete;
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thread_handler& operator=(const thread_handler&) = delete;
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thread_handler(thread_handler&&) = default;
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thread_handler& operator=(thread_handler&&) = default;
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~thread_handler() {
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if (m_thread.joinable()) {
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m_thread.join();
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}
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}
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}; // class thread_handler
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} // namespace thread
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} // namespace osmium
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#endif // OSMIUM_THREAD_UTIL_HPP
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