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author | Michael Lutz <michi@icosahedron.de> | 2019-03-17 01:59:46 +0100 |
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committer | Michael Lutz <michi@icosahedron.de> | 2019-04-06 11:27:39 +0200 |
commit | 05bc2ed7cbe07cb4cd535932f10778b35f72e944 (patch) | |
tree | 0faaf12fd1bafb0786236ffc82052e8b83dfca60 /src/thread.h | |
parent | 05f4e7360886e36b221ef5c3af4426625a3de686 (diff) | |
download | openttd-05bc2ed7cbe07cb4cd535932f10778b35f72e944.tar.xz |
Codechange: Replace custom thread code with C++11 thread objects.
We assume a conforming C++11 compiler environment that has a valid <thread>-header.
Failure to run a real thread is handled gracefully.
Diffstat (limited to 'src/thread.h')
-rw-r--r-- | src/thread.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/src/thread.h b/src/thread.h new file mode 100644 index 000000000..086e2f51e --- /dev/null +++ b/src/thread.h @@ -0,0 +1,78 @@ +/* $Id$ */ + +/* + * This file is part of OpenTTD. + * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2. + * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>. + */ + +/** @file thread.h Base of all threads. */ + +#ifndef THREAD_H +#define THREAD_H + +#include "debug.h" +#include <system_error> +#include <thread> + +/** Signal used for signalling we knowingly want to end the thread. */ +class OTTDThreadExitSignal { }; + + +/** + * Get number of processor cores in the system, including HyperThreading or similar. + * @return Total number of processor cores. + */ +uint GetCPUCoreCount(); + +/** + * Name the thread this function is called on for the debugger. + * @param name Name to set for the thread.. + */ +void SetCurrentThreadName(const char *name); + + +/** + * Start a new thread. + * @tparam TFn Type of the function to call on the thread. + * @tparam TArgs Type of the parameters of the thread function. + * @param thr Pointer to a thread object; may be \c NULL if a detached thread is wanted. + * @param name Name of the thread. + * @param _Fx Function to call on the thread. + * @param _Ax Arguments for the thread function. + * @return True if the thread was successfully started, false otherwise. + */ +template<class TFn, class... TArgs> +inline bool StartNewThread(std::thread *thr, const char *name, TFn&& _Fx, TArgs&&... _Ax) +{ +#ifndef NO_THREADS + try { + std::thread t([] (const char *name, TFn&& F, TArgs&&... A) { + SetCurrentThreadName(name); + try { + /* Call user function with the given arguments. */ + F(A...); + } catch (OTTDThreadExitSignal&) { + } catch (...) { + NOT_REACHED(); + } + }, name, std::forward<TFn>(_Fx), std::forward<TArgs>(_Ax)...); + + if (thr != NULL) { + *thr = std::move(t); + } else { + t.detach(); + } + + return true; + } catch (const std::system_error& e) { + /* Something went wrong, the system we are running on might not support threads. */ + DEBUG(misc, 1, "Can't create thread '%s': %s", name, e.what()); + } +#endif + + return false; +} + +#endif /* THREAD_H */ |