mirror of
https://github.com/RGBCube/serenity
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19bef90923
pthread_mutex is now an actual "sleeping" mutex, and not just a spinlock! It still has a fast path that only uses atomics and (in the successful case) returns immediately without sleeping. In case of contention, it calls futex_wait(), which lets the kernel scheduler put this thread to sleep, *and* lets it know exactly when to consider scheduling it again.
44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
/*
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* Copyright (c) 2021, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <sys/cdefs.h>
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#include <sys/types.h>
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__BEGIN_DECLS
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void __pthread_fork_prepare(void);
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void __pthread_fork_child(void);
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void __pthread_fork_parent(void);
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void __pthread_fork_atfork_register_prepare(void (*)(void));
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void __pthread_fork_atfork_register_parent(void (*)(void));
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void __pthread_fork_atfork_register_child(void (*)(void));
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int __pthread_mutex_init(pthread_mutex_t*, const pthread_mutexattr_t*);
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int __pthread_mutex_lock(pthread_mutex_t*);
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int __pthread_mutex_trylock(pthread_mutex_t*);
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int __pthread_mutex_unlock(pthread_mutex_t*);
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typedef void (*KeyDestructor)(void*);
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int __pthread_key_create(pthread_key_t*, KeyDestructor);
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int __pthread_key_delete(pthread_key_t);
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void* __pthread_getspecific(pthread_key_t);
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int __pthread_setspecific(pthread_key_t, const void*);
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int __pthread_self();
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void __pthread_key_destroy_for_current_thread();
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#define __PTHREAD_MUTEX_NORMAL 0
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#define __PTHREAD_MUTEX_RECURSIVE 1
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#define __PTHREAD_MUTEX_INITIALIZER \
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{ \
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0, 0, 0, __PTHREAD_MUTEX_NORMAL \
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}
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__END_DECLS
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