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https://github.com/jart/cosmopolitan.git
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d2f49ca175
Our makefile generator now accepts badly formatted include lines. It's now more hermetic with better error checking in the cosmo repo, and it can be configured to not be hermetic at all.
494 lines
13 KiB
C++
494 lines
13 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_THREADING_SUPPORT
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#define _LIBCPP_THREADING_SUPPORT
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#include "third_party/libcxx/__config"
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#include "third_party/libcxx/chrono"
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#include "third_party/libcxx/iosfwd"
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#include "libc/thread/thread2.h"
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#include "libc/thread/thread.h"
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#include "third_party/libcxx/errno.h"
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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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#if defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
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//# include "third_party/libcxx/__external_threading"
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#elif !defined(_LIBCPP_HAS_NO_THREADS)
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#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
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#include "libc/thread/thread.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/struct/sched_param.h"
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#include "libc/sysv/consts/sched.h"
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#endif
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#if defined(_LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL) || \
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defined(_LIBCPP_BUILDING_THREAD_LIBRARY_EXTERNAL) || \
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defined(_LIBCPP_HAS_THREAD_API_WIN32)
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#define _LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_FUNC_VIS
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#else
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#define _LIBCPP_THREAD_ABI_VISIBILITY inline _LIBCPP_INLINE_VISIBILITY
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#endif
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#if defined(__FreeBSD__) && defined(__clang__) && __has_attribute(no_thread_safety_analysis)
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#define _LIBCPP_NO_THREAD_SAFETY_ANALYSIS __attribute__((no_thread_safety_analysis))
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#else
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#define _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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#endif
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typedef ::timespec __libcpp_timespec_t;
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#endif // !defined(_LIBCPP_HAS_NO_THREADS)
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_LIBCPP_PUSH_MACROS
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#include "third_party/libcxx/__undef_macros"
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_LIBCPP_BEGIN_NAMESPACE_STD
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#if !defined(_LIBCPP_HAS_NO_THREADS)
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#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
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// Mutex
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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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// Condition Variable
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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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// Execute once
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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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// Thread id
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typedef pthread_t __libcpp_thread_id;
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// Thread
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#define _LIBCPP_NULL_THREAD 0U
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typedef pthread_t __libcpp_thread_t;
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// Thread Local Storage
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typedef pthread_key_t __libcpp_tls_key;
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#define _LIBCPP_TLS_DESTRUCTOR_CC
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#elif !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
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// Mutex
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typedef void* __libcpp_mutex_t;
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#define _LIBCPP_MUTEX_INITIALIZER 0
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#if defined(_M_IX86) || defined(__i386__) || defined(_M_ARM) || defined(__arm__)
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typedef void* __libcpp_recursive_mutex_t[6];
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#elif defined(_M_AMD64) || defined(__x86_64__) || defined(_M_ARM64) || defined(__aarch64__)
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typedef void* __libcpp_recursive_mutex_t[5];
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#else
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# error Unsupported architecture
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#endif
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// Condition Variable
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typedef void* __libcpp_condvar_t;
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#define _LIBCPP_CONDVAR_INITIALIZER 0
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// Execute Once
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typedef void* __libcpp_exec_once_flag;
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#define _LIBCPP_EXEC_ONCE_INITIALIZER 0
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// Thread ID
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typedef long __libcpp_thread_id;
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// Thread
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#define _LIBCPP_NULL_THREAD 0U
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typedef void* __libcpp_thread_t;
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// Thread Local Storage
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typedef long __libcpp_tls_key;
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#define _LIBCPP_TLS_DESTRUCTOR_CC __stdcall
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#endif // !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
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#if !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
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// Mutex
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_LIBCPP_THREAD_ABI_VISIBILITY
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int __libcpp_recursive_mutex_init(__libcpp_recursive_mutex_t *__m);
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_LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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int __libcpp_recursive_mutex_lock(__libcpp_recursive_mutex_t *__m);
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_LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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bool __libcpp_recursive_mutex_trylock(__libcpp_recursive_mutex_t *__m);
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_LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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int __libcpp_recursive_mutex_unlock(__libcpp_recursive_mutex_t *__m);
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_LIBCPP_THREAD_ABI_VISIBILITY
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int __libcpp_recursive_mutex_destroy(__libcpp_recursive_mutex_t *__m);
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_LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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int __libcpp_mutex_lock(__libcpp_mutex_t *__m);
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_LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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bool __libcpp_mutex_trylock(__libcpp_mutex_t *__m);
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_LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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int __libcpp_mutex_unlock(__libcpp_mutex_t *__m);
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_LIBCPP_THREAD_ABI_VISIBILITY
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int __libcpp_mutex_destroy(__libcpp_mutex_t *__m);
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// Condition variable
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_LIBCPP_THREAD_ABI_VISIBILITY
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int __libcpp_condvar_signal(__libcpp_condvar_t* __cv);
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_LIBCPP_THREAD_ABI_VISIBILITY
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int __libcpp_condvar_broadcast(__libcpp_condvar_t* __cv);
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_LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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int __libcpp_condvar_wait(__libcpp_condvar_t* __cv, __libcpp_mutex_t* __m);
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_LIBCPP_THREAD_ABI_VISIBILITY _LIBCPP_NO_THREAD_SAFETY_ANALYSIS
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int __libcpp_condvar_timedwait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m,
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__libcpp_timespec_t *__ts);
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_LIBCPP_THREAD_ABI_VISIBILITY
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int __libcpp_condvar_destroy(__libcpp_condvar_t* __cv);
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// Execute once
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_LIBCPP_THREAD_ABI_VISIBILITY
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int __libcpp_execute_once(__libcpp_exec_once_flag *flag,
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void (*init_routine)());
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// Thread id
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_LIBCPP_THREAD_ABI_VISIBILITY
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bool __libcpp_thread_id_equal(__libcpp_thread_id t1, __libcpp_thread_id t2);
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_LIBCPP_THREAD_ABI_VISIBILITY
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bool __libcpp_thread_id_less(__libcpp_thread_id t1, __libcpp_thread_id t2);
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// Thread
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_LIBCPP_THREAD_ABI_VISIBILITY
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bool __libcpp_thread_isnull(const __libcpp_thread_t *__t);
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_LIBCPP_THREAD_ABI_VISIBILITY
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int __libcpp_thread_create(__libcpp_thread_t *__t, void *(*__func)(void *),
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void *__arg);
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_LIBCPP_THREAD_ABI_VISIBILITY
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__libcpp_thread_id __libcpp_thread_get_current_id();
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_LIBCPP_THREAD_ABI_VISIBILITY
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__libcpp_thread_id __libcpp_thread_get_id(const __libcpp_thread_t *__t);
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_LIBCPP_THREAD_ABI_VISIBILITY
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int __libcpp_thread_join(__libcpp_thread_t *__t);
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_LIBCPP_THREAD_ABI_VISIBILITY
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int __libcpp_thread_detach(__libcpp_thread_t *__t);
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_LIBCPP_THREAD_ABI_VISIBILITY
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void __libcpp_thread_yield();
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_LIBCPP_THREAD_ABI_VISIBILITY
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void __libcpp_thread_sleep_for(const chrono::nanoseconds& __ns);
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// Thread local storage
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_LIBCPP_THREAD_ABI_VISIBILITY
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int __libcpp_tls_create(__libcpp_tls_key* __key,
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void(_LIBCPP_TLS_DESTRUCTOR_CC* __at_exit)(void*));
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_LIBCPP_THREAD_ABI_VISIBILITY
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void *__libcpp_tls_get(__libcpp_tls_key __key);
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_LIBCPP_THREAD_ABI_VISIBILITY
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int __libcpp_tls_set(__libcpp_tls_key __key, void *__p);
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#endif // !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
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#if (!defined(_LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL) || \
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defined(_LIBCPP_BUILDING_THREAD_LIBRARY_EXTERNAL)) && \
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defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
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int __libcpp_recursive_mutex_init(__libcpp_recursive_mutex_t *__m)
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{
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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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int __libcpp_recursive_mutex_lock(__libcpp_recursive_mutex_t *__m)
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{
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return pthread_mutex_lock(__m);
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}
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bool __libcpp_recursive_mutex_trylock(__libcpp_recursive_mutex_t *__m)
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{
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return pthread_mutex_trylock(__m) == 0;
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}
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int __libcpp_recursive_mutex_unlock(__libcpp_mutex_t *__m)
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{
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return pthread_mutex_unlock(__m);
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}
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int __libcpp_recursive_mutex_destroy(__libcpp_recursive_mutex_t *__m)
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{
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return pthread_mutex_destroy(__m);
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}
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int __libcpp_mutex_lock(__libcpp_mutex_t *__m)
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{
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return pthread_mutex_lock(__m);
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}
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bool __libcpp_mutex_trylock(__libcpp_mutex_t *__m)
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{
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return pthread_mutex_trylock(__m) == 0;
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}
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int __libcpp_mutex_unlock(__libcpp_mutex_t *__m)
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{
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return pthread_mutex_unlock(__m);
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}
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int __libcpp_mutex_destroy(__libcpp_mutex_t *__m)
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{
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return pthread_mutex_destroy(__m);
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}
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// Condition Variable
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int __libcpp_condvar_signal(__libcpp_condvar_t *__cv)
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{
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return pthread_cond_signal(__cv);
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}
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int __libcpp_condvar_broadcast(__libcpp_condvar_t *__cv)
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{
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return pthread_cond_broadcast(__cv);
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}
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int __libcpp_condvar_wait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m)
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{
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return pthread_cond_wait(__cv, __m);
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}
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int __libcpp_condvar_timedwait(__libcpp_condvar_t *__cv, __libcpp_mutex_t *__m,
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__libcpp_timespec_t *__ts)
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{
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return pthread_cond_timedwait(__cv, __m, __ts);
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}
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int __libcpp_condvar_destroy(__libcpp_condvar_t *__cv)
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{
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return pthread_cond_destroy(__cv);
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}
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// Execute once
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int __libcpp_execute_once(__libcpp_exec_once_flag *flag,
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void (*init_routine)()) {
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return pthread_once(flag, init_routine);
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}
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// Thread id
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// Returns non-zero if the thread ids are equal, otherwise 0
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bool __libcpp_thread_id_equal(__libcpp_thread_id t1, __libcpp_thread_id t2)
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{
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return pthread_equal(t1, t2) != 0;
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}
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// Returns non-zero if t1 < t2, otherwise 0
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bool __libcpp_thread_id_less(__libcpp_thread_id t1, __libcpp_thread_id t2)
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{
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return t1 < t2;
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}
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// Thread
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bool __libcpp_thread_isnull(const __libcpp_thread_t *__t) {
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return *__t == 0;
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}
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int __libcpp_thread_create(__libcpp_thread_t *__t, void *(*__func)(void *),
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void *__arg)
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{
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return pthread_create(__t, 0, __func, __arg);
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}
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__libcpp_thread_id __libcpp_thread_get_current_id()
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{
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return pthread_self();
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}
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__libcpp_thread_id __libcpp_thread_get_id(const __libcpp_thread_t *__t)
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{
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return *__t;
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}
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int __libcpp_thread_join(__libcpp_thread_t *__t)
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{
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return pthread_join(*__t, 0);
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}
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int __libcpp_thread_detach(__libcpp_thread_t *__t)
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{
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return pthread_detach(*__t);
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}
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void __libcpp_thread_yield()
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{
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pthread_yield();
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}
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void __libcpp_thread_sleep_for(const chrono::nanoseconds& __ns)
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{
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using namespace chrono;
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seconds __s = duration_cast<seconds>(__ns);
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__libcpp_timespec_t __ts;
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typedef decltype(__ts.tv_sec) ts_sec;
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_LIBCPP_CONSTEXPR ts_sec __ts_sec_max = numeric_limits<ts_sec>::max();
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if (__s.count() < __ts_sec_max)
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{
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__ts.tv_sec = static_cast<ts_sec>(__s.count());
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__ts.tv_nsec = static_cast<decltype(__ts.tv_nsec)>((__ns - __s).count());
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}
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else
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{
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__ts.tv_sec = __ts_sec_max;
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__ts.tv_nsec = 999999999; // (10^9 - 1)
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}
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while (nanosleep(&__ts, &__ts) == -1 && errno == EINTR);
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}
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// Thread local storage
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int __libcpp_tls_create(__libcpp_tls_key *__key, void (*__at_exit)(void *))
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{
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return pthread_key_create(__key, __at_exit);
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}
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void *__libcpp_tls_get(__libcpp_tls_key __key)
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{
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return pthread_getspecific(__key);
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}
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int __libcpp_tls_set(__libcpp_tls_key __key, void *__p)
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{
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return pthread_setspecific(__key, __p);
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}
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#endif // !_LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL || _LIBCPP_BUILDING_THREAD_LIBRARY_EXTERNAL
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class _LIBCPP_TYPE_VIS thread;
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class _LIBCPP_TYPE_VIS __thread_id;
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namespace this_thread
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{
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_LIBCPP_INLINE_VISIBILITY __thread_id get_id() _NOEXCEPT;
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} // this_thread
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template<> struct hash<__thread_id>;
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class _LIBCPP_TEMPLATE_VIS __thread_id
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{
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// FIXME: pthread_t is a pointer on Darwin but a long on Linux.
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// NULL is the no-thread value on Darwin. Someone needs to check
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// on other platforms. We assume 0 works everywhere for now.
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__libcpp_thread_id __id_;
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public:
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_LIBCPP_INLINE_VISIBILITY
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__thread_id() _NOEXCEPT : __id_(0) {}
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friend _LIBCPP_INLINE_VISIBILITY
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bool operator==(__thread_id __x, __thread_id __y) _NOEXCEPT
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{ // don't pass id==0 to underlying routines
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if (__x.__id_ == 0) return __y.__id_ == 0;
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if (__y.__id_ == 0) return false;
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return __libcpp_thread_id_equal(__x.__id_, __y.__id_);
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}
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friend _LIBCPP_INLINE_VISIBILITY
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bool operator!=(__thread_id __x, __thread_id __y) _NOEXCEPT
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{return !(__x == __y);}
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friend _LIBCPP_INLINE_VISIBILITY
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bool operator< (__thread_id __x, __thread_id __y) _NOEXCEPT
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{ // id==0 is always less than any other thread_id
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if (__x.__id_ == 0) return __y.__id_ != 0;
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if (__y.__id_ == 0) return false;
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return __libcpp_thread_id_less(__x.__id_, __y.__id_);
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}
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friend _LIBCPP_INLINE_VISIBILITY
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bool operator<=(__thread_id __x, __thread_id __y) _NOEXCEPT
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{return !(__y < __x);}
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friend _LIBCPP_INLINE_VISIBILITY
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bool operator> (__thread_id __x, __thread_id __y) _NOEXCEPT
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{return __y < __x ;}
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friend _LIBCPP_INLINE_VISIBILITY
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bool operator>=(__thread_id __x, __thread_id __y) _NOEXCEPT
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{return !(__x < __y);}
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_LIBCPP_INLINE_VISIBILITY
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void __reset() { __id_ = 0; }
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template<class _CharT, class _Traits>
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friend
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_LIBCPP_INLINE_VISIBILITY
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basic_ostream<_CharT, _Traits>&
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operator<<(basic_ostream<_CharT, _Traits>& __os, __thread_id __id);
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private:
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_LIBCPP_INLINE_VISIBILITY
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__thread_id(__libcpp_thread_id __id) : __id_(__id) {}
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friend __thread_id this_thread::get_id() _NOEXCEPT;
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friend class _LIBCPP_TYPE_VIS thread;
|
|
friend struct _LIBCPP_TEMPLATE_VIS hash<__thread_id>;
|
|
};
|
|
|
|
namespace this_thread
|
|
{
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|
|
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inline _LIBCPP_INLINE_VISIBILITY
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|
__thread_id
|
|
get_id() _NOEXCEPT
|
|
{
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|
return __libcpp_thread_get_current_id();
|
|
}
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|
|
|
} // this_thread
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|
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#endif // !_LIBCPP_HAS_NO_THREADS
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|
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_LIBCPP_END_NAMESPACE_STD
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|
|
|
_LIBCPP_POP_MACROS
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|
|
|
#endif // _LIBCPP_THREADING_SUPPORT
|