b639d0c939
2004-11-20 Jakub Jelinek <jakub@redhat.com> * sysdeps/unix/sysv/linux/bits/socket.h (SCM_RIGHTS): Avoid comma at the end of enum if __USE_BSD is not defined. (calc_inveclosure, calc_eclosure): Skip OP_DELETED_SUBEXP nodes.
467 lines
18 KiB
C
467 lines
18 KiB
C
/* Copyright (C) 2002, 2003, 2004 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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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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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/* 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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/* Adaptive mutex definitions. */
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#ifndef MAX_ADAPTIVE_COUNT
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# define MAX_ADAPTIVE_COUNT 100
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#endif
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/* Internal variables. */
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/* Default stack size. */
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extern size_t __default_stacksize 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 lll_lock_t __attr_list_lock attribute_hidden;
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/* First available RT signal. */
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extern int __current_sigrtmin attribute_hidden;
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/* Last available RT signal. */
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extern int __current_sigrtmax 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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/* 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 && !defined 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 defined NOT_IN_libc && defined 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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#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 !defined NOT_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 defined NOT_IN_libc && defined 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 defined NOT_IN_libc && defined 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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/* The signal used for asynchronous cancelation. */
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#define SIGCANCEL __SIGRTMIN
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/* Signal needed for the kernel-supported POSIX timer implementation.
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We can reuse the cancellation signal since we can distinguish
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cancellation from timer expirations. */
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#define SIGTIMER SIGCANCEL
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/* Signal used to implement the setuid et.al. functions. */
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#define SIGSETXID (__SIGRTMIN + 1)
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/* Used to communicate with signal handler. */
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extern struct xid_command *__xidcmd attribute_hidden;
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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 internal_function;
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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 internal_function;
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/* Free allocated stack. */
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extern void __deallocate_stack (struct pthread *pd)
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attribute_hidden internal_function;
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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)
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internal_function 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 defined NOT_IN_libc && defined 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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internal_function;
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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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internal_function;
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/* Variable set to a nonzero value if more than one thread runs or ran. */
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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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/* Namespace save aliases. */
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extern int __pthread_getschedparam (pthread_t thread_id, int *policy,
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struct sched_param *param);
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extern int __pthread_setschedparam (pthread_t thread_id, int policy,
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const struct sched_param *param);
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extern int __pthread_setcancelstate (int state, int *oldstate);
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extern int __pthread_mutex_init (pthread_mutex_t *__mutex,
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__const pthread_mutexattr_t *__mutexattr);
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extern int __pthread_mutex_init_internal (pthread_mutex_t *__mutex,
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__const pthread_mutexattr_t *__mutexattr)
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attribute_hidden;
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extern int __pthread_mutex_destroy (pthread_mutex_t *__mutex);
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extern int __pthread_mutex_destroy_internal (pthread_mutex_t *__mutex)
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attribute_hidden;
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extern int __pthread_mutex_trylock (pthread_mutex_t *_mutex);
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extern int __pthread_mutex_lock (pthread_mutex_t *__mutex);
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extern int __pthread_mutex_lock_internal (pthread_mutex_t *__mutex)
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attribute_hidden;
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extern int __pthread_mutex_cond_lock (pthread_mutex_t *__mutex)
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attribute_hidden internal_function;
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extern int __pthread_mutex_unlock (pthread_mutex_t *__mutex);
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extern int __pthread_mutex_unlock_internal (pthread_mutex_t *__mutex)
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attribute_hidden;
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extern int __pthread_mutex_unlock_usercnt (pthread_mutex_t *__mutex,
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int __decr)
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attribute_hidden internal_function;
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extern int __pthread_mutexattr_init (pthread_mutexattr_t *attr);
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extern int __pthread_mutexattr_destroy (pthread_mutexattr_t *attr);
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extern int __pthread_mutexattr_settype (pthread_mutexattr_t *attr, int kind);
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extern int __pthread_attr_destroy (pthread_attr_t *attr);
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extern int __pthread_attr_getdetachstate (const pthread_attr_t *attr,
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int *detachstate);
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extern int __pthread_attr_setdetachstate (pthread_attr_t *attr,
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int detachstate);
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extern int __pthread_attr_getinheritsched (const pthread_attr_t *attr,
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int *inherit);
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extern int __pthread_attr_setinheritsched (pthread_attr_t *attr, int inherit);
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extern int __pthread_attr_getschedparam (const pthread_attr_t *attr,
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struct sched_param *param);
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extern int __pthread_attr_setschedparam (pthread_attr_t *attr,
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const struct sched_param *param);
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extern int __pthread_attr_getschedpolicy (const pthread_attr_t *attr,
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int *policy);
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extern int __pthread_attr_setschedpolicy (pthread_attr_t *attr, int policy);
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extern int __pthread_attr_getscope (const pthread_attr_t *attr, int *scope);
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extern int __pthread_attr_setscope (pthread_attr_t *attr, int scope);
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extern int __pthread_attr_getstackaddr (__const pthread_attr_t *__restrict
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__attr, void **__restrict __stackaddr);
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extern int __pthread_attr_setstackaddr (pthread_attr_t *__attr,
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void *__stackaddr);
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extern int __pthread_attr_getstacksize (__const pthread_attr_t *__restrict
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__attr,
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size_t *__restrict __stacksize);
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extern int __pthread_attr_setstacksize (pthread_attr_t *__attr,
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size_t __stacksize);
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extern int __pthread_attr_getstack (__const pthread_attr_t *__restrict __attr,
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void **__restrict __stackaddr,
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size_t *__restrict __stacksize);
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extern int __pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr,
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size_t __stacksize);
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extern int __pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock,
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__const pthread_rwlockattr_t *__restrict
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__attr);
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extern int __pthread_rwlock_destroy (pthread_rwlock_t *__rwlock);
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extern int __pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock);
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extern int __pthread_rwlock_rdlock_internal (pthread_rwlock_t *__rwlock);
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extern int __pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock);
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extern int __pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock);
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extern int __pthread_rwlock_wrlock_internal (pthread_rwlock_t *__rwlock);
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extern int __pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock);
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extern int __pthread_rwlock_unlock (pthread_rwlock_t *__rwlock);
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extern int __pthread_rwlock_unlock_internal (pthread_rwlock_t *__rwlock);
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extern int __pthread_cond_broadcast (pthread_cond_t *cond);
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extern int __pthread_cond_destroy (pthread_cond_t *cond);
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extern int __pthread_cond_init (pthread_cond_t *cond,
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const pthread_condattr_t *cond_attr);
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extern int __pthread_cond_signal (pthread_cond_t *cond);
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extern int __pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex);
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extern int __pthread_cond_timedwait (pthread_cond_t *cond,
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pthread_mutex_t *mutex,
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const struct timespec *abstime);
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extern int __pthread_condattr_destroy (pthread_condattr_t *attr);
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extern int __pthread_condattr_init (pthread_condattr_t *attr);
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extern int __pthread_key_create (pthread_key_t *key, void (*destr) (void *));
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extern int __pthread_key_create_internal (pthread_key_t *key,
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void (*destr) (void *));
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extern void *__pthread_getspecific (pthread_key_t key);
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extern void *__pthread_getspecific_internal (pthread_key_t key);
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extern int __pthread_setspecific (pthread_key_t key, const void *value);
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extern int __pthread_setspecific_internal (pthread_key_t key,
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const void *value);
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extern int __pthread_once (pthread_once_t *once_control,
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void (*init_routine) (void));
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extern int __pthread_once_internal (pthread_once_t *once_control,
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void (*init_routine) (void));
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extern int __pthread_atfork (void (*prepare) (void), void (*parent) (void),
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void (*child) (void));
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extern pthread_t __pthread_self (void);
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extern int __pthread_equal (pthread_t thread1, pthread_t thread2);
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extern int __pthread_kill (pthread_t threadid, int signo);
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extern void __pthread_exit (void *value);
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extern int __pthread_setcanceltype (int type, int *oldtype);
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extern int __pthread_enable_asynccancel (void) attribute_hidden;
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extern void __pthread_disable_asynccancel (int oldtype)
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internal_function attribute_hidden;
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extern int __pthread_cond_broadcast_2_0 (pthread_cond_2_0_t *cond);
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extern int __pthread_cond_destroy_2_0 (pthread_cond_2_0_t *cond);
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extern int __pthread_cond_init_2_0 (pthread_cond_2_0_t *cond,
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const pthread_condattr_t *cond_attr);
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extern int __pthread_cond_signal_2_0 (pthread_cond_2_0_t *cond);
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extern int __pthread_cond_timedwait_2_0 (pthread_cond_2_0_t *cond,
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pthread_mutex_t *mutex,
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const struct timespec *abstime);
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extern int __pthread_cond_wait_2_0 (pthread_cond_2_0_t *cond,
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pthread_mutex_t *mutex);
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extern int __pthread_getaffinity_np (pthread_t th, size_t cpusetsize,
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cpu_set_t *cpuset);
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/* The two functions are in libc.so and not exported. */
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extern int __libc_enable_asynccancel (void) attribute_hidden;
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extern void __libc_disable_asynccancel (int oldtype)
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internal_function attribute_hidden;
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/* The two functions are in librt.so and not exported. */
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extern int __librt_enable_asynccancel (void) attribute_hidden;
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extern void __librt_disable_asynccancel (int oldtype)
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internal_function attribute_hidden;
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#ifdef IS_IN_libpthread
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/* Special versions which use non-exported functions. */
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extern void __pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,
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void (*routine) (void *), void *arg)
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attribute_hidden;
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# undef pthread_cleanup_push
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# define pthread_cleanup_push(routine,arg) \
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{ struct _pthread_cleanup_buffer _buffer; \
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__pthread_cleanup_push (&_buffer, (routine), (arg));
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extern void __pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,
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int execute) attribute_hidden;
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# undef pthread_cleanup_pop
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# define pthread_cleanup_pop(execute) \
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__pthread_cleanup_pop (&_buffer, (execute)); }
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#endif
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extern void __pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,
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void (*routine) (void *), void *arg);
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extern void __pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,
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int execute);
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/* Old cleanup interfaces, still used in libc.so. */
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extern void _pthread_cleanup_push (struct _pthread_cleanup_buffer *buffer,
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void (*routine) (void *), void *arg);
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extern void _pthread_cleanup_pop (struct _pthread_cleanup_buffer *buffer,
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int execute);
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extern void _pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer,
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void (*routine) (void *), void *arg);
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extern void _pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer,
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int execute);
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extern void __nptl_deallocate_tsd (void) attribute_hidden;
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extern int __nptl_setxid (struct xid_command *cmdp) attribute_hidden;
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#ifdef SHARED
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# define PTHREAD_STATIC_FN_REQUIRE(name)
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#else
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# define PTHREAD_STATIC_FN_REQUIRE(name) __asm (".globl " #name);
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#endif
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#endif /* pthreadP.h */
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