673 lines
25 KiB
C
673 lines
25 KiB
C
/* Copyright (C) 2002-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _PTHREADP_H
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#define _PTHREADP_H 1
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#include <pthread.h>
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#include <setjmp.h>
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#include <stdbool.h>
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#include <sys/syscall.h>
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#include "descr.h"
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#include <tls.h>
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#include <lowlevellock.h>
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#include <stackinfo.h>
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#include <internaltypes.h>
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#include <pthread-functions.h>
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#include <atomic.h>
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#include <kernel-features.h>
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#include <errno.h>
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#include <internal-signals.h>
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#include "pthread_mutex_conf.h"
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/* Atomic operations on TLS memory. */
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#ifndef THREAD_ATOMIC_CMPXCHG_VAL
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# define THREAD_ATOMIC_CMPXCHG_VAL(descr, member, new, old) \
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atomic_compare_and_exchange_val_acq (&(descr)->member, new, old)
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#endif
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#ifndef THREAD_ATOMIC_BIT_SET
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# define THREAD_ATOMIC_BIT_SET(descr, member, bit) \
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atomic_bit_set (&(descr)->member, bit)
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#endif
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static inline short max_adaptive_count (void)
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{
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#if HAVE_TUNABLES
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return __mutex_aconf.spin_count;
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#else
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return DEFAULT_ADAPTIVE_COUNT;
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#endif
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}
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/* Magic cookie representing robust mutex with dead owner. */
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#define PTHREAD_MUTEX_INCONSISTENT INT_MAX
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/* Magic cookie representing not recoverable robust mutex. */
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#define PTHREAD_MUTEX_NOTRECOVERABLE (INT_MAX - 1)
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/* Internal mutex type value. */
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enum
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{
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PTHREAD_MUTEX_KIND_MASK_NP = 3,
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PTHREAD_MUTEX_ELISION_NP = 256,
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PTHREAD_MUTEX_NO_ELISION_NP = 512,
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PTHREAD_MUTEX_ROBUST_NORMAL_NP = 16,
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PTHREAD_MUTEX_ROBUST_RECURSIVE_NP
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= PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_RECURSIVE_NP,
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PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP
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= PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
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PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP
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= PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_ADAPTIVE_NP,
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PTHREAD_MUTEX_PRIO_INHERIT_NP = 32,
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PTHREAD_MUTEX_PI_NORMAL_NP
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= PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_NORMAL,
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PTHREAD_MUTEX_PI_RECURSIVE_NP
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= PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_RECURSIVE_NP,
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PTHREAD_MUTEX_PI_ERRORCHECK_NP
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= PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
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PTHREAD_MUTEX_PI_ADAPTIVE_NP
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= PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ADAPTIVE_NP,
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PTHREAD_MUTEX_PI_ROBUST_NORMAL_NP
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= PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_NORMAL_NP,
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PTHREAD_MUTEX_PI_ROBUST_RECURSIVE_NP
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= PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_RECURSIVE_NP,
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PTHREAD_MUTEX_PI_ROBUST_ERRORCHECK_NP
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= PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP,
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PTHREAD_MUTEX_PI_ROBUST_ADAPTIVE_NP
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= PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP,
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PTHREAD_MUTEX_PRIO_PROTECT_NP = 64,
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PTHREAD_MUTEX_PP_NORMAL_NP
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= PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_NORMAL,
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PTHREAD_MUTEX_PP_RECURSIVE_NP
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= PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_RECURSIVE_NP,
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PTHREAD_MUTEX_PP_ERRORCHECK_NP
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= PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
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PTHREAD_MUTEX_PP_ADAPTIVE_NP
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= PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ADAPTIVE_NP,
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PTHREAD_MUTEX_ELISION_FLAGS_NP
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= PTHREAD_MUTEX_ELISION_NP | PTHREAD_MUTEX_NO_ELISION_NP,
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PTHREAD_MUTEX_TIMED_ELISION_NP =
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PTHREAD_MUTEX_TIMED_NP | PTHREAD_MUTEX_ELISION_NP,
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PTHREAD_MUTEX_TIMED_NO_ELISION_NP =
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PTHREAD_MUTEX_TIMED_NP | PTHREAD_MUTEX_NO_ELISION_NP,
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};
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#define PTHREAD_MUTEX_PSHARED_BIT 128
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/* See concurrency notes regarding __kind in struct __pthread_mutex_s
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in sysdeps/nptl/bits/thread-shared-types.h. */
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#define PTHREAD_MUTEX_TYPE(m) \
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(atomic_load_relaxed (&((m)->__data.__kind)) & 127)
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/* Don't include NO_ELISION, as that type is always the same
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as the underlying lock type. */
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#define PTHREAD_MUTEX_TYPE_ELISION(m) \
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(atomic_load_relaxed (&((m)->__data.__kind)) \
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& (127 | PTHREAD_MUTEX_ELISION_NP))
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#if LLL_PRIVATE == 0 && LLL_SHARED == 128
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# define PTHREAD_MUTEX_PSHARED(m) \
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(atomic_load_relaxed (&((m)->__data.__kind)) & 128)
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#else
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# define PTHREAD_MUTEX_PSHARED(m) \
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((atomic_load_relaxed (&((m)->__data.__kind)) & 128) \
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? LLL_SHARED : LLL_PRIVATE)
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#endif
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/* The kernel when waking robust mutexes on exit never uses
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FUTEX_PRIVATE_FLAG FUTEX_WAKE. */
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#define PTHREAD_ROBUST_MUTEX_PSHARED(m) LLL_SHARED
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/* Ceiling in __data.__lock. __data.__lock is signed, so don't
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use the MSB bit in there, but in the mask also include that bit,
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so that the compiler can optimize & PTHREAD_MUTEX_PRIO_CEILING_MASK
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masking if the value is then shifted down by
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PTHREAD_MUTEX_PRIO_CEILING_SHIFT. */
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#define PTHREAD_MUTEX_PRIO_CEILING_SHIFT 19
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#define PTHREAD_MUTEX_PRIO_CEILING_MASK 0xfff80000
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/* Flags in mutex attr. */
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#define PTHREAD_MUTEXATTR_PROTOCOL_SHIFT 28
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#define PTHREAD_MUTEXATTR_PROTOCOL_MASK 0x30000000
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#define PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT 12
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#define PTHREAD_MUTEXATTR_PRIO_CEILING_MASK 0x00fff000
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#define PTHREAD_MUTEXATTR_FLAG_ROBUST 0x40000000
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#define PTHREAD_MUTEXATTR_FLAG_PSHARED 0x80000000
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#define PTHREAD_MUTEXATTR_FLAG_BITS \
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(PTHREAD_MUTEXATTR_FLAG_ROBUST | PTHREAD_MUTEXATTR_FLAG_PSHARED \
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| PTHREAD_MUTEXATTR_PROTOCOL_MASK | PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
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/* For the following, see pthread_rwlock_common.c. */
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#define PTHREAD_RWLOCK_WRPHASE 1
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#define PTHREAD_RWLOCK_WRLOCKED 2
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#define PTHREAD_RWLOCK_RWAITING 4
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#define PTHREAD_RWLOCK_READER_SHIFT 3
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#define PTHREAD_RWLOCK_READER_OVERFLOW ((unsigned int) 1 \
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<< (sizeof (unsigned int) * 8 - 1))
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#define PTHREAD_RWLOCK_WRHANDOVER ((unsigned int) 1 \
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<< (sizeof (unsigned int) * 8 - 1))
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#define PTHREAD_RWLOCK_FUTEX_USED 2
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/* Bits used in robust mutex implementation. */
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#define FUTEX_WAITERS 0x80000000
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#define FUTEX_OWNER_DIED 0x40000000
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#define FUTEX_TID_MASK 0x3fffffff
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/* pthread_once definitions. See __pthread_once for how these are used. */
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#define __PTHREAD_ONCE_INPROGRESS 1
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#define __PTHREAD_ONCE_DONE 2
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#define __PTHREAD_ONCE_FORK_GEN_INCR 4
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/* Attribute to indicate thread creation was issued from C11 thrd_create. */
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#define ATTR_C11_THREAD ((void*)(uintptr_t)-1)
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/* Condition variable definitions. See __pthread_cond_wait_common.
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Need to be defined here so there is one place from which
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nptl_lock_constants can grab them. */
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#define __PTHREAD_COND_CLOCK_MONOTONIC_MASK 2
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#define __PTHREAD_COND_SHARED_MASK 1
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/* Internal variables. */
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/* Default pthread attributes. */
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extern struct pthread_attr __default_pthread_attr attribute_hidden;
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extern int __default_pthread_attr_lock attribute_hidden;
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/* Size and alignment of static TLS block. */
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extern size_t __static_tls_size attribute_hidden;
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extern size_t __static_tls_align_m1 attribute_hidden;
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/* Flag whether the machine is SMP or not. */
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extern int __is_smp attribute_hidden;
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/* Thread descriptor handling. */
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extern list_t __stack_user;
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hidden_proto (__stack_user)
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/* Attribute handling. */
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extern struct pthread_attr *__attr_list attribute_hidden;
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extern int __attr_list_lock attribute_hidden;
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/* Concurrency handling. */
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extern int __concurrency_level attribute_hidden;
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/* Thread-local data key handling. */
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extern struct pthread_key_struct __pthread_keys[PTHREAD_KEYS_MAX];
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hidden_proto (__pthread_keys)
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/* Number of threads running. */
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extern unsigned int __nptl_nthreads attribute_hidden;
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#ifndef __ASSUME_SET_ROBUST_LIST
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/* Negative if we do not have the system call and we can use it. */
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extern int __set_robust_list_avail attribute_hidden;
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#endif
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/* Thread Priority Protection. */
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extern int __sched_fifo_min_prio attribute_hidden;
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extern int __sched_fifo_max_prio attribute_hidden;
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extern void __init_sched_fifo_prio (void) attribute_hidden;
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extern int __pthread_tpp_change_priority (int prev_prio, int new_prio)
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attribute_hidden;
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extern int __pthread_current_priority (void) attribute_hidden;
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/* The library can run in debugging mode where it performs a lot more
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tests. */
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extern int __pthread_debug attribute_hidden;
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/** For now disable debugging support. */
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#if 0
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# define DEBUGGING_P __builtin_expect (__pthread_debug, 0)
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# define INVALID_TD_P(pd) (DEBUGGING_P && __find_in_stack_list (pd) == NULL)
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# define INVALID_NOT_TERMINATED_TD_P(pd) INVALID_TD_P (pd)
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#else
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# define DEBUGGING_P 0
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/* Simplified test. This will not catch all invalid descriptors but
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is better than nothing. And if the test triggers the thread
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descriptor is guaranteed to be invalid. */
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# define INVALID_TD_P(pd) __builtin_expect ((pd)->tid <= 0, 0)
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# define INVALID_NOT_TERMINATED_TD_P(pd) __builtin_expect ((pd)->tid < 0, 0)
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#endif
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/* Cancellation test. */
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#define CANCELLATION_P(self) \
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do { \
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int cancelhandling = THREAD_GETMEM (self, cancelhandling); \
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if (CANCEL_ENABLED_AND_CANCELED (cancelhandling)) \
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{ \
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THREAD_SETMEM (self, result, PTHREAD_CANCELED); \
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__do_cancel (); \
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} \
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} while (0)
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extern void __pthread_unwind (__pthread_unwind_buf_t *__buf)
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__cleanup_fct_attribute __attribute ((__noreturn__))
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#if !defined SHARED && !IS_IN (libpthread)
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weak_function
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#endif
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;
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extern void __pthread_unwind_next (__pthread_unwind_buf_t *__buf)
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__cleanup_fct_attribute __attribute ((__noreturn__))
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#ifndef SHARED
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weak_function
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#endif
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;
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extern void __pthread_register_cancel (__pthread_unwind_buf_t *__buf)
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__cleanup_fct_attribute;
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extern void __pthread_unregister_cancel (__pthread_unwind_buf_t *__buf)
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__cleanup_fct_attribute;
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#if IS_IN (libpthread)
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hidden_proto (__pthread_unwind)
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hidden_proto (__pthread_unwind_next)
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hidden_proto (__pthread_register_cancel)
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hidden_proto (__pthread_unregister_cancel)
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# ifdef SHARED
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extern void attribute_hidden pthread_cancel_init (void);
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# endif
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extern void __nptl_unwind_freeres (void) attribute_hidden;
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#endif
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/* Called when a thread reacts on a cancellation request. */
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static inline void
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__attribute ((noreturn, always_inline))
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__do_cancel (void)
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{
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struct pthread *self = THREAD_SELF;
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/* Make sure we get no more cancellations. */
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THREAD_ATOMIC_BIT_SET (self, cancelhandling, EXITING_BIT);
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__pthread_unwind ((__pthread_unwind_buf_t *)
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THREAD_GETMEM (self, cleanup_jmp_buf));
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}
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/* Set cancellation mode to asynchronous. */
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#define CANCEL_ASYNC() \
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__pthread_enable_asynccancel ()
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/* Reset to previous cancellation mode. */
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#define CANCEL_RESET(oldtype) \
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__pthread_disable_asynccancel (oldtype)
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#if IS_IN (libc)
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/* Same as CANCEL_ASYNC, but for use in libc.so. */
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# define LIBC_CANCEL_ASYNC() \
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__libc_enable_asynccancel ()
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/* Same as CANCEL_RESET, but for use in libc.so. */
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# define LIBC_CANCEL_RESET(oldtype) \
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__libc_disable_asynccancel (oldtype)
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# define LIBC_CANCEL_HANDLED() \
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__asm (".globl " __SYMBOL_PREFIX "__libc_enable_asynccancel"); \
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__asm (".globl " __SYMBOL_PREFIX "__libc_disable_asynccancel")
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#elif IS_IN (libpthread)
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# define LIBC_CANCEL_ASYNC() CANCEL_ASYNC ()
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# define LIBC_CANCEL_RESET(val) CANCEL_RESET (val)
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# define LIBC_CANCEL_HANDLED() \
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__asm (".globl " __SYMBOL_PREFIX "__pthread_enable_asynccancel"); \
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__asm (".globl " __SYMBOL_PREFIX "__pthread_disable_asynccancel")
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#elif IS_IN (librt)
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# define LIBC_CANCEL_ASYNC() \
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__librt_enable_asynccancel ()
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# define LIBC_CANCEL_RESET(val) \
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__librt_disable_asynccancel (val)
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# define LIBC_CANCEL_HANDLED() \
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__asm (".globl " __SYMBOL_PREFIX "__librt_enable_asynccancel"); \
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__asm (".globl " __SYMBOL_PREFIX "__librt_disable_asynccancel")
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#else
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# define LIBC_CANCEL_ASYNC() 0 /* Just a dummy value. */
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# define LIBC_CANCEL_RESET(val) ((void)(val)) /* Nothing, but evaluate it. */
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# define LIBC_CANCEL_HANDLED() /* Nothing. */
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#endif
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/* Internal prototypes. */
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/* Thread list handling. */
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extern struct pthread *__find_in_stack_list (struct pthread *pd)
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attribute_hidden;
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/* Deallocate a thread's stack after optionally making sure the thread
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descriptor is still valid. */
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extern void __free_tcb (struct pthread *pd) attribute_hidden;
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/* Free allocated stack. */
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extern void __deallocate_stack (struct pthread *pd) attribute_hidden;
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/* Mark all the stacks except for the current one as available. This
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function also re-initializes the lock for the stack cache. */
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extern void __reclaim_stacks (void) attribute_hidden;
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/* Make all threads's stacks executable. */
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extern int __make_stacks_executable (void **stack_endp) attribute_hidden;
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/* longjmp handling. */
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extern void __pthread_cleanup_upto (__jmp_buf target, char *targetframe);
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#if IS_IN (libpthread)
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hidden_proto (__pthread_cleanup_upto)
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#endif
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/* Functions with versioned interfaces. */
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extern int __pthread_create_2_1 (pthread_t *newthread,
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const pthread_attr_t *attr,
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void *(*start_routine) (void *), void *arg);
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extern int __pthread_create_2_0 (pthread_t *newthread,
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const pthread_attr_t *attr,
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void *(*start_routine) (void *), void *arg);
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extern int __pthread_attr_init_2_1 (pthread_attr_t *attr);
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extern int __pthread_attr_init_2_0 (pthread_attr_t *attr);
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/* Event handlers for libthread_db interface. */
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extern void __nptl_create_event (void);
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extern void __nptl_death_event (void);
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hidden_proto (__nptl_create_event)
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hidden_proto (__nptl_death_event)
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/* Register the generation counter in the libpthread with the libc. */
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#ifdef TLS_MULTIPLE_THREADS_IN_TCB
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extern void __libc_pthread_init (unsigned long int *ptr,
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void (*reclaim) (void),
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const struct pthread_functions *functions);
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#else
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extern int *__libc_pthread_init (unsigned long int *ptr,
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void (*reclaim) (void),
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const struct pthread_functions *functions);
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/* Variable set to a nonzero value either if more than one thread runs or ran,
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or if a single-threaded process is trying to cancel itself. See
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nptl/descr.h for more context on the single-threaded process case. */
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extern int __pthread_multiple_threads attribute_hidden;
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/* Pointer to the corresponding variable in libc. */
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extern int *__libc_multiple_threads_ptr attribute_hidden;
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#endif
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/* Find a thread given its TID. */
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extern struct pthread *__find_thread_by_id (pid_t tid) attribute_hidden
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#ifdef SHARED
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;
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#else
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weak_function;
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#define __find_thread_by_id(tid) \
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(__find_thread_by_id ? (__find_thread_by_id) (tid) : (struct pthread *) NULL)
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#endif
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extern void __pthread_init_static_tls (struct link_map *) attribute_hidden;
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extern size_t __pthread_get_minstack (const pthread_attr_t *attr);
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/* Namespace save aliases. */
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extern int __pthread_getschedparam (pthread_t thread_id, int *policy,
|
|
struct sched_param *param);
|
|
extern int __pthread_setschedparam (pthread_t thread_id, int policy,
|
|
const struct sched_param *param);
|
|
extern int __pthread_setcancelstate (int state, int *oldstate);
|
|
extern int __pthread_mutex_init (pthread_mutex_t *__mutex,
|
|
const pthread_mutexattr_t *__mutexattr);
|
|
extern int __pthread_mutex_destroy (pthread_mutex_t *__mutex);
|
|
extern int __pthread_mutex_trylock (pthread_mutex_t *_mutex);
|
|
extern int __pthread_mutex_lock (pthread_mutex_t *__mutex);
|
|
extern int __pthread_mutex_timedlock (pthread_mutex_t *__mutex,
|
|
const struct timespec *__abstime);
|
|
extern int __pthread_mutex_cond_lock (pthread_mutex_t *__mutex)
|
|
attribute_hidden;
|
|
extern void __pthread_mutex_cond_lock_adjust (pthread_mutex_t *__mutex)
|
|
attribute_hidden;
|
|
extern int __pthread_mutex_unlock (pthread_mutex_t *__mutex);
|
|
extern int __pthread_mutex_unlock_usercnt (pthread_mutex_t *__mutex,
|
|
int __decr) attribute_hidden;
|
|
extern int __pthread_mutexattr_init (pthread_mutexattr_t *attr);
|
|
extern int __pthread_mutexattr_destroy (pthread_mutexattr_t *attr);
|
|
extern int __pthread_mutexattr_settype (pthread_mutexattr_t *attr, int kind);
|
|
extern int __pthread_attr_destroy (pthread_attr_t *attr);
|
|
extern int __pthread_attr_getdetachstate (const pthread_attr_t *attr,
|
|
int *detachstate);
|
|
extern int __pthread_attr_setdetachstate (pthread_attr_t *attr,
|
|
int detachstate);
|
|
extern int __pthread_attr_getinheritsched (const pthread_attr_t *attr,
|
|
int *inherit);
|
|
extern int __pthread_attr_setinheritsched (pthread_attr_t *attr, int inherit);
|
|
extern int __pthread_attr_getschedparam (const pthread_attr_t *attr,
|
|
struct sched_param *param);
|
|
extern int __pthread_attr_setschedparam (pthread_attr_t *attr,
|
|
const struct sched_param *param);
|
|
extern int __pthread_attr_getschedpolicy (const pthread_attr_t *attr,
|
|
int *policy);
|
|
extern int __pthread_attr_setschedpolicy (pthread_attr_t *attr, int policy);
|
|
extern int __pthread_attr_getscope (const pthread_attr_t *attr, int *scope);
|
|
extern int __pthread_attr_setscope (pthread_attr_t *attr, int scope);
|
|
extern int __pthread_attr_getstackaddr (const pthread_attr_t *__restrict
|
|
__attr, void **__restrict __stackaddr);
|
|
extern int __pthread_attr_setstackaddr (pthread_attr_t *__attr,
|
|
void *__stackaddr);
|
|
extern int __pthread_attr_getstacksize (const pthread_attr_t *__restrict
|
|
__attr,
|
|
size_t *__restrict __stacksize);
|
|
extern int __pthread_attr_setstacksize (pthread_attr_t *__attr,
|
|
size_t __stacksize);
|
|
extern int __pthread_attr_getstack (const pthread_attr_t *__restrict __attr,
|
|
void **__restrict __stackaddr,
|
|
size_t *__restrict __stacksize);
|
|
extern int __pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr,
|
|
size_t __stacksize);
|
|
extern int __pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock,
|
|
const pthread_rwlockattr_t *__restrict
|
|
__attr);
|
|
extern int __pthread_rwlock_destroy (pthread_rwlock_t *__rwlock);
|
|
extern int __pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock);
|
|
extern int __pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock);
|
|
extern int __pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock);
|
|
extern int __pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock);
|
|
extern int __pthread_rwlock_unlock (pthread_rwlock_t *__rwlock);
|
|
extern int __pthread_cond_broadcast (pthread_cond_t *cond);
|
|
extern int __pthread_cond_destroy (pthread_cond_t *cond);
|
|
extern int __pthread_cond_init (pthread_cond_t *cond,
|
|
const pthread_condattr_t *cond_attr);
|
|
extern int __pthread_cond_signal (pthread_cond_t *cond);
|
|
extern int __pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex);
|
|
extern int __pthread_cond_timedwait (pthread_cond_t *cond,
|
|
pthread_mutex_t *mutex,
|
|
const struct timespec *abstime);
|
|
extern int __pthread_condattr_destroy (pthread_condattr_t *attr);
|
|
extern int __pthread_condattr_init (pthread_condattr_t *attr);
|
|
extern int __pthread_key_create (pthread_key_t *key, void (*destr) (void *));
|
|
extern int __pthread_key_delete (pthread_key_t key);
|
|
extern void *__pthread_getspecific (pthread_key_t key);
|
|
extern int __pthread_setspecific (pthread_key_t key, const void *value);
|
|
extern int __pthread_once (pthread_once_t *once_control,
|
|
void (*init_routine) (void));
|
|
extern int __pthread_atfork (void (*prepare) (void), void (*parent) (void),
|
|
void (*child) (void));
|
|
extern pthread_t __pthread_self (void);
|
|
extern int __pthread_equal (pthread_t thread1, pthread_t thread2);
|
|
extern int __pthread_detach (pthread_t th);
|
|
extern int __pthread_cancel (pthread_t th);
|
|
extern int __pthread_kill (pthread_t threadid, int signo);
|
|
extern void __pthread_exit (void *value) __attribute__ ((__noreturn__));
|
|
extern int __pthread_join (pthread_t threadid, void **thread_return);
|
|
extern int __pthread_setcanceltype (int type, int *oldtype);
|
|
extern int __pthread_enable_asynccancel (void) attribute_hidden;
|
|
extern void __pthread_disable_asynccancel (int oldtype) attribute_hidden;
|
|
extern void __pthread_testcancel (void);
|
|
extern int __pthread_timedjoin_ex (pthread_t, void **, const struct timespec *,
|
|
bool);
|
|
|
|
#if IS_IN (libpthread)
|
|
hidden_proto (__pthread_mutex_init)
|
|
hidden_proto (__pthread_mutex_destroy)
|
|
hidden_proto (__pthread_mutex_lock)
|
|
hidden_proto (__pthread_mutex_trylock)
|
|
hidden_proto (__pthread_mutex_unlock)
|
|
hidden_proto (__pthread_rwlock_rdlock)
|
|
hidden_proto (__pthread_rwlock_wrlock)
|
|
hidden_proto (__pthread_rwlock_unlock)
|
|
hidden_proto (__pthread_key_create)
|
|
hidden_proto (__pthread_getspecific)
|
|
hidden_proto (__pthread_setspecific)
|
|
hidden_proto (__pthread_once)
|
|
hidden_proto (__pthread_setcancelstate)
|
|
hidden_proto (__pthread_testcancel)
|
|
hidden_proto (__pthread_mutexattr_init)
|
|
hidden_proto (__pthread_mutexattr_settype)
|
|
hidden_proto (__pthread_timedjoin_ex)
|
|
#endif
|
|
|
|
extern int __pthread_cond_broadcast_2_0 (pthread_cond_2_0_t *cond);
|
|
extern int __pthread_cond_destroy_2_0 (pthread_cond_2_0_t *cond);
|
|
extern int __pthread_cond_init_2_0 (pthread_cond_2_0_t *cond,
|
|
const pthread_condattr_t *cond_attr);
|
|
extern int __pthread_cond_signal_2_0 (pthread_cond_2_0_t *cond);
|
|
extern int __pthread_cond_timedwait_2_0 (pthread_cond_2_0_t *cond,
|
|
pthread_mutex_t *mutex,
|
|
const struct timespec *abstime);
|
|
extern int __pthread_cond_wait_2_0 (pthread_cond_2_0_t *cond,
|
|
pthread_mutex_t *mutex);
|
|
|
|
extern int __pthread_getaffinity_np (pthread_t th, size_t cpusetsize,
|
|
cpu_set_t *cpuset);
|
|
|
|
/* The two functions are in libc.so and not exported. */
|
|
extern int __libc_enable_asynccancel (void) attribute_hidden;
|
|
extern void __libc_disable_asynccancel (int oldtype) attribute_hidden;
|
|
|
|
|
|
/* The two functions are in librt.so and not exported. */
|
|
extern int __librt_enable_asynccancel (void) attribute_hidden;
|
|
extern void __librt_disable_asynccancel (int oldtype) attribute_hidden;
|
|
|
|
#if IS_IN (libpthread)
|
|
/* Special versions which use non-exported functions. */
|
|
extern void __pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,
|
|
void (*routine) (void *), void *arg)
|
|
attribute_hidden;
|
|
|
|
/* Replace cleanup macros defined in <pthread.h> with internal
|
|
versions that don't depend on unwind info and better support
|
|
cancellation. */
|
|
# undef pthread_cleanup_push
|
|
# define pthread_cleanup_push(routine,arg) \
|
|
{ struct _pthread_cleanup_buffer _buffer; \
|
|
__pthread_cleanup_push (&_buffer, (routine), (arg));
|
|
|
|
extern void __pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,
|
|
int execute) attribute_hidden;
|
|
# undef pthread_cleanup_pop
|
|
# define pthread_cleanup_pop(execute) \
|
|
__pthread_cleanup_pop (&_buffer, (execute)); }
|
|
#endif
|
|
|
|
extern void __pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,
|
|
void (*routine) (void *), void *arg);
|
|
extern void __pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,
|
|
int execute);
|
|
|
|
/* Old cleanup interfaces, still used in libc.so. */
|
|
extern void _pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,
|
|
void (*routine) (void *), void *arg);
|
|
extern void _pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,
|
|
int execute);
|
|
extern void _pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,
|
|
void (*routine) (void *), void *arg);
|
|
extern void _pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,
|
|
int execute);
|
|
|
|
extern void __nptl_deallocate_tsd (void) attribute_hidden;
|
|
|
|
extern void __nptl_setxid_error (struct xid_command *cmdp, int error)
|
|
attribute_hidden;
|
|
extern int __nptl_setxid (struct xid_command *cmdp) attribute_hidden;
|
|
#ifndef SHARED
|
|
extern void __nptl_set_robust (struct pthread *self);
|
|
#endif
|
|
|
|
extern void __nptl_stacks_freeres (void) attribute_hidden;
|
|
extern void __shm_directory_freeres (void) attribute_hidden;
|
|
|
|
extern void __wait_lookup_done (void) attribute_hidden;
|
|
|
|
#ifdef SHARED
|
|
# define PTHREAD_STATIC_FN_REQUIRE(name)
|
|
#else
|
|
# define PTHREAD_STATIC_FN_REQUIRE(name) __asm (".globl " #name);
|
|
#endif
|
|
|
|
/* Returns 0 if POL is a valid scheduling policy. */
|
|
static inline int
|
|
check_sched_policy_attr (int pol)
|
|
{
|
|
if (pol == SCHED_OTHER || pol == SCHED_FIFO || pol == SCHED_RR)
|
|
return 0;
|
|
|
|
return EINVAL;
|
|
}
|
|
|
|
/* Returns 0 if PR is within the accepted range of priority values for
|
|
the scheduling policy POL or EINVAL otherwise. */
|
|
static inline int
|
|
check_sched_priority_attr (int pr, int pol)
|
|
{
|
|
int min = __sched_get_priority_min (pol);
|
|
int max = __sched_get_priority_max (pol);
|
|
|
|
if (min >= 0 && max >= 0 && pr >= min && pr <= max)
|
|
return 0;
|
|
|
|
return EINVAL;
|
|
}
|
|
|
|
/* Returns 0 if ST is a valid stack size for a thread stack and EINVAL
|
|
otherwise. */
|
|
static inline int
|
|
check_stacksize_attr (size_t st)
|
|
{
|
|
if (st >= PTHREAD_STACK_MIN)
|
|
return 0;
|
|
|
|
return EINVAL;
|
|
}
|
|
|
|
#define ASSERT_TYPE_SIZE(type, size) \
|
|
_Static_assert (sizeof (type) == size, \
|
|
"sizeof (" #type ") != " #size)
|
|
|
|
#define ASSERT_PTHREAD_INTERNAL_SIZE(type, internal) \
|
|
_Static_assert (sizeof ((type) { { 0 } }).__size >= sizeof (internal),\
|
|
"sizeof (" #type ".__size) < sizeof (" #internal ")")
|
|
|
|
#define ASSERT_PTHREAD_STRING(x) __STRING (x)
|
|
#define ASSERT_PTHREAD_INTERNAL_OFFSET(type, member, offset) \
|
|
_Static_assert (offsetof (type, member) == offset, \
|
|
"offset of " #member " field of " #type " != " \
|
|
ASSERT_PTHREAD_STRING (offset))
|
|
|
|
#endif /* pthreadP.h */
|