mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 02:32:45 +00:00
4a8683ea68
This patch implements a simple version of the futex (fast userspace mutex) API in the kernel and uses it to make the pthread_cond_t API's block instead of busily sched_yield(). An arbitrary userspace address is passed to the kernel as a "token" that identifies the futex and you can then FUTEX_WAIT and FUTEX_WAKE that specific userspace address. FUTEX_WAIT corresponds to pthread_cond_wait() and FUTEX_WAKE is used for pthread_cond_signal() and pthread_cond_broadcast(). I'm pretty sure I'm missing something in this implementation, but it's hopefully okay for a start. :^)
88 lines
3.3 KiB
C
88 lines
3.3 KiB
C
#pragma once
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#include <sched.h>
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#include <stdint.h>
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <time.h>
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__BEGIN_DECLS
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int pthread_create(pthread_t*, pthread_attr_t*, void* (*)(void*), void*);
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void pthread_exit(void*);
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int pthread_kill(pthread_t, int);
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void pthread_cleanup_push(void (*)(void*), void*);
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void pthread_cleanup_pop(int);
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int pthread_join(pthread_t, void**);
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int pthread_mutex_lock(pthread_mutex_t*);
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int pthread_mutex_trylock(pthread_mutex_t* mutex);
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int pthread_mutex_unlock(pthread_mutex_t*);
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int pthread_mutex_init(pthread_mutex_t*, const pthread_mutexattr_t*);
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int pthread_mutex_destroy(pthread_mutex_t*);
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int pthread_attr_init(pthread_attr_t*);
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int pthread_attr_destroy(pthread_attr_t*);
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#define PTHREAD_CREATE_JOINABLE 0
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#define PTHREAD_CREATE_DETACHED 1
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int pthread_attr_getdetachstate(const pthread_attr_t*, int*);
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int pthread_attr_setdetachstate(pthread_attr_t*, int);
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int pthread_attr_getguardsize(const pthread_attr_t*, size_t*);
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int pthread_attr_setguardsize(pthread_attr_t*, size_t);
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int pthread_attr_getschedparam(const pthread_attr_t*, struct sched_param*);
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int pthread_attr_setschedparam(pthread_attr_t*, const struct sched_param*);
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int pthread_attr_getstack(const pthread_attr_t*, void**, size_t*);
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int pthread_attr_setstack(pthread_attr_t* attr, void*, size_t);
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int pthread_attr_getstacksize(const pthread_attr_t*, size_t*);
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int pthread_attr_setstacksize(pthread_attr_t*, size_t);
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int pthread_once(pthread_once_t*, void (*)());
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#define PTHREAD_ONCE_INIT 0
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void* pthread_getspecific(pthread_key_t key);
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int pthread_setspecific(pthread_key_t key, const void* value);
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int pthread_getschedparam(pthread_t thread, int* policy, struct sched_param* param);
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int pthread_setschedparam(pthread_t thread, int policy, const struct sched_param* param);
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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_DEFAULT PTHREAD_MUTEX_NORMAL
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#define PTHREAD_MUTEX_INITIALIZER { 0, 0, 0, PTHREAD_MUTEX_DEFAULT }
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#define PTHREAD_COND_INITIALIZER { 0, 0, CLOCK_MONOTONIC }
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int pthread_key_create(pthread_key_t* key, void (*destructor)(void*));
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int pthread_key_delete(pthread_key_t key);
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int pthread_cond_broadcast(pthread_cond_t*);
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int pthread_cond_init(pthread_cond_t*, const pthread_condattr_t*);
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int pthread_cond_signal(pthread_cond_t*);
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int pthread_cond_wait(pthread_cond_t*, pthread_mutex_t*);
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int pthread_condattr_init(pthread_condattr_t*);
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int pthread_condattr_setclock(pthread_condattr_t*, clockid_t);
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int pthread_condattr_destroy(pthread_condattr_t*);
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int pthread_cancel(pthread_t);
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int pthread_cond_destroy(pthread_cond_t*);
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int pthread_cond_timedwait(pthread_cond_t*, pthread_mutex_t*, const struct timespec*);
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void pthread_testcancel(void);
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int pthread_spin_destroy(pthread_spinlock_t*);
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int pthread_spin_init(pthread_spinlock_t*, int);
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int pthread_spin_lock(pthread_spinlock_t*);
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int pthread_spin_trylock(pthread_spinlock_t*);
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int pthread_spin_unlock(pthread_spinlock_t*);
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pthread_t pthread_self(void);
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int pthread_detach(pthread_t);
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int pthread_equal(pthread_t, pthread_t);
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int pthread_mutexattr_init(pthread_mutexattr_t*);
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int pthread_mutexattr_settype(pthread_mutexattr_t*, int);
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int pthread_mutexattr_destroy(pthread_mutexattr_t*);
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int pthread_setname_np(pthread_t, const char*, int);
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int pthread_getname_np(pthread_t, char*, int);
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__END_DECLS
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