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C++11 patchset 5: use std::threads and remove old compat layer (#5928)
* C++11 patchset 5: use std::threads and remove old compat layer * use pragma once in modified headers * use C++11 function delete for object copy
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Loïc Blot
GitHub
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5bd33a1586
@ -28,31 +28,6 @@ DEALINGS IN THE SOFTWARE.
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#include "log.h"
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#include "porting.h"
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#define UNUSED(expr) do { (void)(expr); } while (0)
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#if USE_CPP11_THREADS
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#include <chrono>
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#include <system_error>
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#elif USE_WIN_THREADS
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#ifndef _WIN32_WCE
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#include <process.h>
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#endif
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#elif USE_POSIX_THREADS
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#include <time.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/time.h>
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#if defined(__FreeBSD__) || defined(__APPLE__)
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#elif defined(_GNU_SOURCE)
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#include <sys/sysinfo.h>
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#endif
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#endif
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// for setName
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#if defined(__linux__)
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#include <sys/prctl.h>
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@ -70,8 +45,6 @@ DEALINGS IN THE SOFTWARE.
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// for bindToProcessor
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#if __FreeBSD_version >= 702106
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typedef cpuset_t cpu_set_t;
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#elif defined(__linux__)
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#include <sched.h>
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#elif defined(__sun) || defined(sun)
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#include <sys/types.h>
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#include <sys/processor.h>
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@ -121,28 +94,12 @@ bool Thread::start()
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// The mutex may already be locked if the thread is being restarted
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m_start_finished_mutex.try_lock();
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#if USE_CPP11_THREADS
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try {
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m_thread_obj = new std::thread(threadProc, this);
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} catch (const std::system_error &e) {
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return false;
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}
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#elif USE_WIN_THREADS
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m_thread_handle = CreateThread(NULL, 0, threadProc, this, 0, &m_thread_id);
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if (!m_thread_handle)
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return false;
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#elif USE_POSIX_THREADS
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int status = pthread_create(&m_thread_handle, NULL, threadProc, this);
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if (status)
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return false;
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#endif
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// Allow spawned thread to continue
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m_start_finished_mutex.unlock();
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@ -169,31 +126,12 @@ bool Thread::wait()
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if (!m_joinable)
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return false;
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#if USE_CPP11_THREADS
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m_thread_obj->join();
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delete m_thread_obj;
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m_thread_obj = NULL;
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#elif USE_WIN_THREADS
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int ret = WaitForSingleObject(m_thread_handle, INFINITE);
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assert(ret == WAIT_OBJECT_0);
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UNUSED(ret);
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CloseHandle(m_thread_handle);
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m_thread_handle = NULL;
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m_thread_id = -1;
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#elif USE_POSIX_THREADS
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int ret = pthread_join(m_thread_handle, NULL);
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assert(ret == 0);
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UNUSED(ret);
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#endif
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assert(m_running == false);
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m_joinable = false;
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return true;
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@ -209,9 +147,10 @@ bool Thread::kill()
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m_running = false;
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#if USE_WIN_THREADS
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TerminateThread(m_thread_handle, 0);
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CloseHandle(m_thread_handle);
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#if defined(_WIN32)
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// See https://msdn.microsoft.com/en-us/library/hh920601.aspx#thread__native_handle_method
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TerminateThread((HANDLE) m_thread_obj->native_handle(), 0);
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CloseHandle((HANDLE) m_thread_obj->native_handle());
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#else
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// We need to pthread_kill instead on Android since NDKv5's pthread
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// implementation is incomplete.
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@ -241,13 +180,7 @@ bool Thread::getReturnValue(void **ret)
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}
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#if USE_CPP11_THREADS || USE_POSIX_THREADS
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void *Thread::threadProc(void *param)
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#elif defined(_WIN32_WCE)
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DWORD Thread::threadProc(LPVOID param)
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#elif defined(_WIN32)
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DWORD WINAPI Thread::threadProc(LPVOID param)
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#endif
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{
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Thread *thr = (Thread *)param;
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@ -325,46 +258,7 @@ void Thread::setName(const std::string &name)
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unsigned int Thread::getNumberOfProcessors()
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{
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#if USE_CPP11_THREADS
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return std::thread::hardware_concurrency();
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#elif USE_WIN_THREADS
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SYSTEM_INFO sysinfo;
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GetSystemInfo(&sysinfo);
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return sysinfo.dwNumberOfProcessors;
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#elif defined(_SC_NPROCESSORS_ONLN)
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return sysconf(_SC_NPROCESSORS_ONLN);
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#elif defined(__FreeBSD__) || defined(__NetBSD__) || \
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defined(__DragonFly__) || defined(__APPLE__)
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unsigned int num_cpus = 1;
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size_t len = sizeof(num_cpus);
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int mib[2];
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mib[0] = CTL_HW;
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mib[1] = HW_NCPU;
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sysctl(mib, 2, &num_cpus, &len, NULL, 0);
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return num_cpus;
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#elif defined(_GNU_SOURCE)
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return get_nprocs();
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#elif defined(PTW32_VERSION) || defined(__hpux)
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return pthread_num_processors_np();
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#else
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return 1;
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#endif
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}
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@ -23,8 +23,7 @@ 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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#ifndef THREADING_THREAD_H
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#define THREADING_THREAD_H
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#pragma once
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#include "util/basic_macros.h"
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#include "threads.h"
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@ -93,17 +92,8 @@ public:
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inline bool isRunning() { return m_running; }
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inline bool stopRequested() { return m_request_stop; }
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#if USE_CPP11_THREADS
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inline threadid_t getThreadId() { return m_thread_obj->get_id(); }
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inline threadhandle_t getThreadHandle() { return m_thread_obj->native_handle(); }
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#else
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# if USE_WIN_THREADS
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inline threadid_t getThreadId() { return m_thread_id; }
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# else
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inline threadid_t getThreadId() { return m_thread_handle; }
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# endif
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inline threadhandle_t getThreadHandle() { return m_thread_handle; }
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#endif
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/*
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* Gets the thread return value.
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@ -156,14 +146,7 @@ private:
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std::mutex m_mutex;
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std::mutex m_start_finished_mutex;
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#if USE_CPP11_THREADS
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std::thread *m_thread_obj;
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#else
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threadhandle_t m_thread_handle;
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# if USE_WIN_THREADS
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threadid_t m_thread_id;
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# endif
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#endif
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static ThreadStartFunc threadProc;
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@ -172,9 +155,6 @@ private:
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// available to us, so we maintain one ourselves. This is set on thread start.
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tid_t m_kernel_thread_id;
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#endif
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DISABLE_CLASS_COPY(Thread);
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Thread(const Thread &) = delete;
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};
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#endif
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@ -1,6 +1,7 @@
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/*
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Minetest
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Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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Copyright (C) 2017 nerzhul, Loic Blot <loic.blot@unix-experience.fr>
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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 Lesser General Public License as published by
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@ -17,92 +18,34 @@ with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef THREADS_HEADER
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#define THREADS_HEADER
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//
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// Determine which threading APIs we will use
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//
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#if __cplusplus >= 201103L
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#define USE_CPP11_THREADS 1
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#elif defined(_WIN32)
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#define USE_WIN_THREADS 1
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#else
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#define USE_POSIX_THREADS 1
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#endif
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#if defined(_WIN32)
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// Prefer critical section API because std::mutex is much slower on Windows
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#define USE_WIN_MUTEX 1
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#elif __cplusplus >= 201103L
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#define USE_CPP11_MUTEX 1
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#else
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#define USE_POSIX_MUTEX 1
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#endif
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#pragma once
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///////////////
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#if USE_CPP11_THREADS
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#include <thread>
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#elif USE_POSIX_THREADS
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#include <pthread.h>
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#else
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#ifndef WIN32_LEAN_AND_MEAN
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#define WIN32_LEAN_AND_MEAN
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#endif
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#include <windows.h>
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#endif
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#include <thread>
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//
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// threadid_t, threadhandle_t
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//
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#if USE_CPP11_THREADS
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typedef std::thread::id threadid_t;
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typedef std::thread::native_handle_type threadhandle_t;
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#elif USE_WIN_THREADS
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typedef DWORD threadid_t;
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typedef HANDLE threadhandle_t;
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#elif USE_POSIX_THREADS
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typedef pthread_t threadid_t;
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typedef pthread_t threadhandle_t;
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#endif
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typedef std::thread::id threadid_t;
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typedef std::thread::native_handle_type threadhandle_t;
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//
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// ThreadStartFunc
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//
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#if USE_CPP11_THREADS || USE_POSIX_THREADS
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typedef void *ThreadStartFunc(void *param);
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#elif defined(_WIN32_WCE)
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typedef DWORD ThreadStartFunc(LPVOID param);
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#elif defined(_WIN32)
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typedef DWORD WINAPI ThreadStartFunc(LPVOID param);
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#endif
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typedef void *ThreadStartFunc(void *param);
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inline threadid_t thr_get_current_thread_id()
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{
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#if USE_CPP11_THREADS
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return std::this_thread::get_id();
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#elif USE_WIN_THREADS
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return GetCurrentThreadId();
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#elif USE_POSIX_THREADS
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return pthread_self();
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#endif
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}
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inline bool thr_compare_thread_id(threadid_t thr1, threadid_t thr2)
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{
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#if USE_POSIX_THREADS
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return pthread_equal(thr1, thr2);
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#else
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return thr1 == thr2;
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#endif
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}
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inline bool thr_is_current_thread(threadid_t thr)
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{
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return thr_compare_thread_id(thr_get_current_thread_id(), thr);
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}
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#endif
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