e78f53d1e8
This reverts commit 68c04b0ae6.
This disables the IWYU mapping that caused the failure, since
the headers aren't reachable for now.
This is the first part of the "Freezing C++03 headers" proposal
explained in
https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc/77319/58.
This patch mechanically copies the headers as of the LLVM 19.1 release
into a subdirectory of libc++ so that we can start using these headers
when building in C++03 mode. We are going to be backporting important
changes to that copy of the headers until the LLVM 21 release. After the
LLVM 21 release, only critical bugfixes will be fixed in the C++03 copy
of the headers.
This patch only performs a copy of the headers -- these headers are
still unused by the rest of the codebase.
222 lines
6.9 KiB
C++
222 lines
6.9 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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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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#ifndef _LIBCPP___THREAD_SUPPORT_PTHREAD_H
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#define _LIBCPP___THREAD_SUPPORT_PTHREAD_H
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#include <__chrono/convert_to_timespec.h>
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#include <__chrono/duration.h>
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#include <__config>
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#include <ctime>
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#include <errno.h>
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#include <pthread.h>
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#include <sched.h>
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#ifdef __MVS__
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# include <__support/ibm/nanosleep.h>
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#endif
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// Some platforms require <bits/atomic_wide_counter.h> in order for
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// PTHREAD_COND_INITIALIZER to be expanded. Normally that would come
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// in via <pthread.h>, but it's a non-modular header on those platforms,
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// so libc++'s <math.h> usually absorbs atomic_wide_counter.h into the
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// module with <math.h> and makes atomic_wide_counter.h invisible.
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// Include <math.h> here to work around that.
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// This checks wheter a Clang module is built
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#if __building_module(std)
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# include <math.h>
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#endif
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#ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
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# pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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using __libcpp_timespec_t = ::timespec;
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//
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// Mutex
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//
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typedef pthread_mutex_t __libcpp_mutex_t;
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#define _LIBCPP_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
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typedef pthread_mutex_t __libcpp_recursive_mutex_t;
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inline _LIBCPP_HIDE_FROM_ABI int __libcpp_recursive_mutex_init(__libcpp_recursive_mutex_t* __m) {
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pthread_mutexattr_t __attr;
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int __ec = pthread_mutexattr_init(&__attr);
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if (__ec)
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return __ec;
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__ec = pthread_mutexattr_settype(&__attr, PTHREAD_MUTEX_RECURSIVE);
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if (__ec) {
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pthread_mutexattr_destroy(&__attr);
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return __ec;
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}
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__ec = pthread_mutex_init(__m, &__attr);
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if (__ec) {
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pthread_mutexattr_destroy(&__attr);
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return __ec;
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}
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__ec = pthread_mutexattr_destroy(&__attr);
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if (__ec) {
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pthread_mutex_destroy(__m);
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return __ec;
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}
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return 0;
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}
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inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_NO_THREAD_SAFETY_ANALYSIS int
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__libcpp_recursive_mutex_lock(__libcpp_recursive_mutex_t* __m) {
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return pthread_mutex_lock(__m);
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}
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inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_NO_THREAD_SAFETY_ANALYSIS bool
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__libcpp_recursive_mutex_trylock(__libcpp_recursive_mutex_t* __m) {
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return pthread_mutex_trylock(__m) == 0;
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}
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inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_NO_THREAD_SAFETY_ANALYSIS int
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__libcpp_recursive_mutex_unlock(__libcpp_recursive_mutex_t* __m) {
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return pthread_mutex_unlock(__m);
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}
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inline _LIBCPP_HIDE_FROM_ABI int __libcpp_recursive_mutex_destroy(__libcpp_recursive_mutex_t* __m) {
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return pthread_mutex_destroy(__m);
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}
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inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_NO_THREAD_SAFETY_ANALYSIS int __libcpp_mutex_lock(__libcpp_mutex_t* __m) {
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return pthread_mutex_lock(__m);
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}
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inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_NO_THREAD_SAFETY_ANALYSIS bool __libcpp_mutex_trylock(__libcpp_mutex_t* __m) {
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return pthread_mutex_trylock(__m) == 0;
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}
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inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_NO_THREAD_SAFETY_ANALYSIS int __libcpp_mutex_unlock(__libcpp_mutex_t* __m) {
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return pthread_mutex_unlock(__m);
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}
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inline _LIBCPP_HIDE_FROM_ABI int __libcpp_mutex_destroy(__libcpp_mutex_t* __m) { return pthread_mutex_destroy(__m); }
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//
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// Condition Variable
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//
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typedef pthread_cond_t __libcpp_condvar_t;
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#define _LIBCPP_CONDVAR_INITIALIZER PTHREAD_COND_INITIALIZER
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inline _LIBCPP_HIDE_FROM_ABI int __libcpp_condvar_signal(__libcpp_condvar_t* __cv) { return pthread_cond_signal(__cv); }
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inline _LIBCPP_HIDE_FROM_ABI int __libcpp_condvar_broadcast(__libcpp_condvar_t* __cv) {
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return pthread_cond_broadcast(__cv);
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}
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inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_NO_THREAD_SAFETY_ANALYSIS int
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__libcpp_condvar_wait(__libcpp_condvar_t* __cv, __libcpp_mutex_t* __m) {
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return pthread_cond_wait(__cv, __m);
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}
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inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_NO_THREAD_SAFETY_ANALYSIS int
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__libcpp_condvar_timedwait(__libcpp_condvar_t* __cv, __libcpp_mutex_t* __m, __libcpp_timespec_t* __ts) {
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return pthread_cond_timedwait(__cv, __m, __ts);
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}
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inline _LIBCPP_HIDE_FROM_ABI int __libcpp_condvar_destroy(__libcpp_condvar_t* __cv) {
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return pthread_cond_destroy(__cv);
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}
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//
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// Execute once
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//
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typedef pthread_once_t __libcpp_exec_once_flag;
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#define _LIBCPP_EXEC_ONCE_INITIALIZER PTHREAD_ONCE_INIT
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inline _LIBCPP_HIDE_FROM_ABI int __libcpp_execute_once(__libcpp_exec_once_flag* __flag, void (*__init_routine)()) {
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return pthread_once(__flag, __init_routine);
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}
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//
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// Thread id
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//
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#if defined(__MVS__)
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typedef unsigned long long __libcpp_thread_id;
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#else
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typedef pthread_t __libcpp_thread_id;
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#endif
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// Returns non-zero if the thread ids are equal, otherwise 0
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inline _LIBCPP_HIDE_FROM_ABI bool __libcpp_thread_id_equal(__libcpp_thread_id __t1, __libcpp_thread_id __t2) {
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return __t1 == __t2;
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}
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// Returns non-zero if t1 < t2, otherwise 0
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inline _LIBCPP_HIDE_FROM_ABI bool __libcpp_thread_id_less(__libcpp_thread_id __t1, __libcpp_thread_id __t2) {
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return __t1 < __t2;
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}
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//
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// Thread
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//
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#define _LIBCPP_NULL_THREAD ((__libcpp_thread_t()))
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typedef pthread_t __libcpp_thread_t;
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inline _LIBCPP_HIDE_FROM_ABI __libcpp_thread_id __libcpp_thread_get_id(const __libcpp_thread_t* __t) {
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#if defined(__MVS__)
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return __t->__;
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#else
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return *__t;
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#endif
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}
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inline _LIBCPP_HIDE_FROM_ABI bool __libcpp_thread_isnull(const __libcpp_thread_t* __t) {
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return __libcpp_thread_get_id(__t) == 0;
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}
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inline _LIBCPP_HIDE_FROM_ABI int __libcpp_thread_create(__libcpp_thread_t* __t, void* (*__func)(void*), void* __arg) {
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return pthread_create(__t, nullptr, __func, __arg);
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}
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inline _LIBCPP_HIDE_FROM_ABI __libcpp_thread_id __libcpp_thread_get_current_id() {
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const __libcpp_thread_t __current_thread = pthread_self();
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return __libcpp_thread_get_id(&__current_thread);
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}
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inline _LIBCPP_HIDE_FROM_ABI int __libcpp_thread_join(__libcpp_thread_t* __t) { return pthread_join(*__t, nullptr); }
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inline _LIBCPP_HIDE_FROM_ABI int __libcpp_thread_detach(__libcpp_thread_t* __t) { return pthread_detach(*__t); }
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inline _LIBCPP_HIDE_FROM_ABI void __libcpp_thread_yield() { sched_yield(); }
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inline _LIBCPP_HIDE_FROM_ABI void __libcpp_thread_sleep_for(const chrono::nanoseconds& __ns) {
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__libcpp_timespec_t __ts = std::__convert_to_timespec<__libcpp_timespec_t>(__ns);
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while (nanosleep(&__ts, &__ts) == -1 && errno == EINTR)
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;
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}
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//
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// Thread local storage
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//
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#define _LIBCPP_TLS_DESTRUCTOR_CC /* nothing */
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typedef pthread_key_t __libcpp_tls_key;
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inline _LIBCPP_HIDE_FROM_ABI int __libcpp_tls_create(__libcpp_tls_key* __key, void (*__at_exit)(void*)) {
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return pthread_key_create(__key, __at_exit);
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}
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inline _LIBCPP_HIDE_FROM_ABI void* __libcpp_tls_get(__libcpp_tls_key __key) { return pthread_getspecific(__key); }
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inline _LIBCPP_HIDE_FROM_ABI int __libcpp_tls_set(__libcpp_tls_key __key, void* __p) {
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return pthread_setspecific(__key, __p);
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}
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___THREAD_SUPPORT_PTHREAD_H
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