99 lines
2.1 KiB
C++
99 lines
2.1 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2019
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include "td/utils/port/detail/ThreadPthread.h"
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char disable_linker_warning_about_empty_file_thread_pthread_cpp TD_UNUSED;
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#if TD_THREAD_PTHREAD
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#include "td/utils/misc.h"
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#include <pthread.h>
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#include <sched.h>
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#include <sys/sysctl.h>
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#include <unistd.h>
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namespace td {
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namespace detail {
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unsigned ThreadPthread::hardware_concurrency() {
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// Linux and macOS
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#if defined(_SC_NPROCESSORS_ONLN)
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{
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auto res = sysconf(_SC_NPROCESSORS_ONLN);
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if (res > 0) {
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return narrow_cast<unsigned>(res);
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}
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}
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#endif
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// *BSD
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#if defined(HW_AVAILCPU) && defined(CTL_HW)
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{
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int mib[2] = {CTL_HW, HW_AVAILCPU};
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int res{0};
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size_t len = sizeof(res);
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if (sysctl(mib, 2, &res, &len, nullptr, 0) == 0 && res != 0) {
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return res;
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}
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}
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#endif
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#if defined(HW_NCPU) && defined(CTL_HW)
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{
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int mib[2] = {CTL_HW, HW_NCPU};
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int res{0};
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size_t len = sizeof(res);
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if (sysctl(mib, 2, &res, &len, nullptr, 0) == 0 && res != 0) {
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return res;
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}
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}
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#endif
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// Just in case
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return 8;
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}
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void ThreadPthread::set_name(CSlice name) {
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#if defined(_GNU_SOURCE) && defined(__GLIBC_PREREQ)
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#if __GLIBC_PREREQ(2, 12)
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pthread_setname_np(thread_, name.c_str());
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#endif
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#endif
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}
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void ThreadPthread::join() {
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if (is_inited_.get()) {
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is_inited_ = false;
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pthread_join(thread_, nullptr);
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}
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}
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void ThreadPthread::detach() {
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if (is_inited_.get()) {
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is_inited_ = false;
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pthread_detach(thread_);
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}
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}
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int ThreadPthread::do_pthread_create(pthread_t *thread, const pthread_attr_t *attr, void *(*start_routine)(void *),
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void *arg) {
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return pthread_create(thread, attr, start_routine, arg);
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}
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namespace this_thread_pthread {
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void yield() {
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sched_yield();
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}
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ThreadPthread::id get_id() {
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return pthread_self();
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}
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} // namespace this_thread_pthread
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} // namespace detail
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} // namespace td
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#endif
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