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Implement POSIX threads API
This commit is contained in:
Justine Tunney
parent
af24f21556
commit
9be364d40a
95 changed files with 6029 additions and 317 deletions
267
third_party/libcxx/thread.cc
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267
third_party/libcxx/thread.cc
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// clang-format off
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//===------------------------- thread.cpp----------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "third_party/libcxx/__config"
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#ifndef _LIBCPP_HAS_NO_THREADS
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#include "third_party/libcxx/thread"
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#include "third_party/libcxx/exception"
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#include "third_party/libcxx/vector"
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#include "third_party/libcxx/future"
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#include "third_party/libcxx/limits"
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#include "libc/calls/makedev.h"
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#include "libc/calls/weirdtypes.h"
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#include "libc/intrin/newbie.h"
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#include "libc/calls/typedef/u.h"
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#include "libc/calls/weirdtypes.h"
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#include "libc/sock/select.h"
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#include "libc/sysv/consts/endian.h"
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#if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
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#include "libc/intrin/newbie.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/struct/rlimit.h"
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#include "libc/calls/struct/rusage.h"
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#include "libc/calls/sysparam.h"
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#include "libc/calls/weirdtypes.h"
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#include "libc/limits.h"
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#include "libc/sysv/consts/endian.h"
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#include "libc/sysv/consts/prio.h"
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#include "libc/sysv/consts/rlim.h"
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#include "libc/sysv/consts/rlimit.h"
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#include "libc/sysv/consts/rusage.h"
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# if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
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// MISSING #include <sys/sysctl.h>
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# endif
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#endif // defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
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#if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__CloudABI__) || defined(__Fuchsia__) || defined(__wasi__)
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#include "libc/calls/calls.h"
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#include "libc/calls/weirdtypes.h"
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#include "libc/runtime/sysconf.h"
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#include "libc/sysv/consts/fileno.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/consts/ok.h"
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#include "third_party/getopt/getopt.h"
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#endif // defined(__unix__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__CloudABI__) || defined(__Fuchsia__) || defined(__wasi__)
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#if defined(__NetBSD__)
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#pragma weak pthread_create // Do not create libpthread dependency
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#endif
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#if defined(_LIBCPP_WIN32API)
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#include "libc/nt/accounting.h"
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#include "libc/nt/automation.h"
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#include "libc/nt/console.h"
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#include "libc/nt/debug.h"
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#include "libc/nt/dll.h"
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#include "libc/nt/enum/keyaccess.h"
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#include "libc/nt/enum/regtype.h"
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#include "libc/nt/errors.h"
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#include "libc/nt/events.h"
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#include "libc/nt/files.h"
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#include "libc/nt/ipc.h"
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#include "libc/nt/memory.h"
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#include "libc/nt/paint.h"
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#include "libc/nt/process.h"
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#include "libc/nt/registry.h"
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#include "libc/nt/synchronization.h"
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#include "libc/nt/thread.h"
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#include "libc/nt/windows.h"
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#include "libc/nt/winsock.h"
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#endif
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#if defined(__unix__) && !defined(__ANDROID__) && defined(__ELF__) && defined(_LIBCPP_HAS_COMMENT_LIB_PRAGMA)
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#pragma comment(lib, "pthread")
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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thread::~thread()
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{
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if (!__libcpp_thread_isnull(&__t_))
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terminate();
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}
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void
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thread::join()
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{
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int ec = EINVAL;
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if (!__libcpp_thread_isnull(&__t_))
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{
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ec = __libcpp_thread_join(&__t_);
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if (ec == 0)
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__t_ = _LIBCPP_NULL_THREAD;
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}
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if (ec)
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__throw_system_error(ec, "thread::join failed");
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}
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void
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thread::detach()
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{
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int ec = EINVAL;
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if (!__libcpp_thread_isnull(&__t_))
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{
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ec = __libcpp_thread_detach(&__t_);
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if (ec == 0)
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__t_ = _LIBCPP_NULL_THREAD;
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}
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if (ec)
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__throw_system_error(ec, "thread::detach failed");
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}
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unsigned
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thread::hardware_concurrency() _NOEXCEPT
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{
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#if defined(CTL_HW) && defined(HW_NCPU)
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unsigned n;
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int mib[2] = {CTL_HW, HW_NCPU};
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std::size_t s = sizeof(n);
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sysctl(mib, 2, &n, &s, 0, 0);
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return n;
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#elif defined(_SC_NPROCESSORS_ONLN)
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long result = sysconf(_SC_NPROCESSORS_ONLN);
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// sysconf returns -1 if the name is invalid, the option does not exist or
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// does not have a definite limit.
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// if sysconf returns some other negative number, we have no idea
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// what is going on. Default to something safe.
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if (result < 0)
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return 0;
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return static_cast<unsigned>(result);
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#elif defined(_LIBCPP_WIN32API)
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SYSTEM_INFO info;
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GetSystemInfo(&info);
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return info.dwNumberOfProcessors;
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#else // defined(CTL_HW) && defined(HW_NCPU)
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// TODO: grovel through /proc or check cpuid on x86 and similar
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// instructions on other architectures.
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# if defined(_LIBCPP_WARNING)
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_LIBCPP_WARNING("hardware_concurrency not yet implemented")
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# else
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# warning hardware_concurrency not yet implemented
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# endif
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return 0; // Means not computable [thread.thread.static]
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#endif // defined(CTL_HW) && defined(HW_NCPU)
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}
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namespace this_thread
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{
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void
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sleep_for(const chrono::nanoseconds& ns)
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{
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if (ns > chrono::nanoseconds::zero())
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{
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__libcpp_thread_sleep_for(ns);
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}
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}
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} // this_thread
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__thread_specific_ptr<__thread_struct>&
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__thread_local_data()
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{
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static __thread_specific_ptr<__thread_struct> __p;
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return __p;
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}
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// __thread_struct_imp
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template <class T>
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class _LIBCPP_HIDDEN __hidden_allocator
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{
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public:
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typedef T value_type;
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T* allocate(size_t __n)
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{return static_cast<T*>(::operator new(__n * sizeof(T)));}
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void deallocate(T* __p, size_t) {::operator delete(static_cast<void*>(__p));}
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size_t max_size() const {return size_t(~0) / sizeof(T);}
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};
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class _LIBCPP_HIDDEN __thread_struct_imp
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{
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typedef vector<__assoc_sub_state*,
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__hidden_allocator<__assoc_sub_state*> > _AsyncStates;
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typedef vector<pair<condition_variable*, mutex*>,
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__hidden_allocator<pair<condition_variable*, mutex*> > > _Notify;
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_AsyncStates async_states_;
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_Notify notify_;
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__thread_struct_imp(const __thread_struct_imp&);
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__thread_struct_imp& operator=(const __thread_struct_imp&);
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public:
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__thread_struct_imp() {}
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~__thread_struct_imp();
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void notify_all_at_thread_exit(condition_variable* cv, mutex* m);
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void __make_ready_at_thread_exit(__assoc_sub_state* __s);
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};
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__thread_struct_imp::~__thread_struct_imp()
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{
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for (_Notify::iterator i = notify_.begin(), e = notify_.end();
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i != e; ++i)
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{
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i->second->unlock();
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i->first->notify_all();
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}
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for (_AsyncStates::iterator i = async_states_.begin(), e = async_states_.end();
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i != e; ++i)
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{
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(*i)->__make_ready();
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(*i)->__release_shared();
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}
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}
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void
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__thread_struct_imp::notify_all_at_thread_exit(condition_variable* cv, mutex* m)
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{
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notify_.push_back(pair<condition_variable*, mutex*>(cv, m));
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}
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void
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__thread_struct_imp::__make_ready_at_thread_exit(__assoc_sub_state* __s)
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{
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async_states_.push_back(__s);
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__s->__add_shared();
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}
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// __thread_struct
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__thread_struct::__thread_struct()
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: __p_(new __thread_struct_imp)
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{
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}
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__thread_struct::~__thread_struct()
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{
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delete __p_;
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}
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void
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__thread_struct::notify_all_at_thread_exit(condition_variable* cv, mutex* m)
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{
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__p_->notify_all_at_thread_exit(cv, m);
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}
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void
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__thread_struct::__make_ready_at_thread_exit(__assoc_sub_state* __s)
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{
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__p_->__make_ready_at_thread_exit(__s);
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}
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_LIBCPP_END_NAMESPACE_STD
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#endif // !_LIBCPP_HAS_NO_THREADS
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