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GCC will insert various calls to pthread functions when compiling C++ code with static initializers, even when the user doesn't link their program against libpthread explicitly. This is used to make static initializers thread-safe, e.g. when building a library that does not itself use thread functionality and thus does not link against libpthread - but is intended to be used with other code that does use libpthread explicitly. This makes these symbols available in libc.
107 lines
3.7 KiB
C++
107 lines
3.7 KiB
C++
/*
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* Copyright (c) 2021, Gunnar Beutner <gunnar@beutner.name>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <LibC/assert.h>
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#include <LibC/bits/pthread_forward.h>
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static PthreadFunctions s_pthread_functions;
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void __init_pthread_forward(PthreadFunctions funcs)
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{
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s_pthread_functions = funcs;
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}
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int pthread_mutex_trylock(pthread_mutex_t* mutex)
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{
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VERIFY(s_pthread_functions.pthread_mutex_trylock);
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return s_pthread_functions.pthread_mutex_trylock(mutex);
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}
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int pthread_mutex_destroy(pthread_mutex_t* mutex)
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{
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VERIFY(s_pthread_functions.pthread_mutex_destroy);
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return s_pthread_functions.pthread_mutex_destroy(mutex);
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}
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int pthread_mutexattr_init(pthread_mutexattr_t* attr)
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{
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VERIFY(s_pthread_functions.pthread_mutexattr_init);
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return s_pthread_functions.pthread_mutexattr_init(attr);
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}
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int pthread_mutexattr_settype(pthread_mutexattr_t* attr, int type)
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{
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VERIFY(s_pthread_functions.pthread_mutexattr_settype);
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return s_pthread_functions.pthread_mutexattr_settype(attr, type);
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}
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int pthread_mutexattr_destroy(pthread_mutexattr_t* attr)
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{
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VERIFY(s_pthread_functions.pthread_mutexattr_destroy);
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return s_pthread_functions.pthread_mutexattr_destroy(attr);
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}
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int pthread_once(pthread_once_t* self, void (*callback)(void))
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{
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VERIFY(s_pthread_functions.pthread_once);
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return s_pthread_functions.pthread_once(self, callback);
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}
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int pthread_cond_broadcast(pthread_cond_t* cond)
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{
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VERIFY(s_pthread_functions.pthread_cond_broadcast);
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return s_pthread_functions.pthread_cond_broadcast(cond);
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}
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int pthread_cond_init(pthread_cond_t* cond, const pthread_condattr_t* attr)
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{
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VERIFY(s_pthread_functions.pthread_cond_init);
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return s_pthread_functions.pthread_cond_init(cond, attr);
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}
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int pthread_cond_signal(pthread_cond_t* cond)
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{
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VERIFY(s_pthread_functions.pthread_cond_signal);
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return s_pthread_functions.pthread_cond_signal(cond);
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}
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int pthread_cond_wait(pthread_cond_t* cond, pthread_mutex_t* mutex)
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{
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VERIFY(s_pthread_functions.pthread_cond_wait);
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return s_pthread_functions.pthread_cond_wait(cond, mutex);
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}
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int pthread_cond_destroy(pthread_cond_t* cond)
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{
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VERIFY(s_pthread_functions.pthread_cond_destroy);
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return s_pthread_functions.pthread_cond_destroy(cond);
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}
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int pthread_cond_timedwait(pthread_cond_t* cond, pthread_mutex_t* mutex, const struct timespec* abstime)
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{
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VERIFY(s_pthread_functions.pthread_cond_timedwait);
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return s_pthread_functions.pthread_cond_timedwait(cond, mutex, abstime);
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}
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