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diff --git a/lib/pthread.in.h b/lib/pthread.in.h
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+/* Implement a trivial subset of POSIX 1003.1-2008 pthread.h.
+
+ Copyright (C) 2009-2016 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, see <http://www.gnu.org/licenses/>. */
+
+/* Written by Paul Eggert and Glen Lenker. */
+
+#ifndef _@GUARD_PREFIX@_PTHREAD_H_
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* The include_next requires a split double-inclusion guard. */
+#if @HAVE_PTHREAD_H@
+# @INCLUDE_NEXT@ @NEXT_PTHREAD_H@
+#endif
+
+#ifndef _@GUARD_PREFIX@_PTHREAD_H_
+#define _@GUARD_PREFIX@_PTHREAD_H_
+
+#define __need_system_stdlib_h
+#include <stdlib.h>
+#undef __need_system_stdlib_h
+
+
+/* The pthreads-win32 <pthread.h> defines a couple of broken macros. */
+#undef asctime_r
+#undef ctime_r
+#undef gmtime_r
+#undef localtime_r
+#undef rand_r
+#undef strtok_r
+
+#include <errno.h>
+#include <sched.h>
+#include <sys/types.h>
+#include <time.h>
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef _GL_PTHREAD_INLINE
+# define _GL_PTHREAD_INLINE _GL_INLINE
+#endif
+
+#if ! @HAVE_PTHREAD_T@
+# if !GNULIB_defined_pthread_types
+ typedef int pthread_t;
+ typedef int pthread_attr_t;
+ typedef int pthread_barrier_t;
+ typedef int pthread_barrierattr_t;
+ typedef int pthread_cond_t;
+ typedef int pthread_condattr_t;
+ typedef int pthread_key_t;
+ typedef int pthread_mutex_t;
+ typedef int pthread_mutexattr_t;
+ typedef int pthread_once_t;
+ typedef int pthread_rwlock_t;
+ typedef int pthread_rwlockattr_t;
+# define GNULIB_defined_pthread_types 1
+# endif
+#endif
+
+#ifndef PTHREAD_COND_INITIALIZER
+#define PTHREAD_COND_INITIALIZER { 0 }
+#define PTHREAD_MUTEX_INITIALIZER { 0 }
+#define PTHREAD_ONCE_INIT { 0 }
+#define PTHREAD_RWLOCK_INITIALIZER { 0 }
+
+#define PTHREAD_BARRIER_SERIAL_THREAD (-1)
+
+#define PTHREAD_CANCEL_DEFERRED 0
+#define PTHREAD_CANCEL_ASYNCHRONOUS 1
+
+#define PTHREAD_CANCEL_ENABLE 0
+#define PTHREAD_CANCEL_DISABLE 1
+
+#define PTHREAD_CANCELED ((void *) -1)
+
+#define PTHREAD_CREATE_JOINABLE 0
+#define PTHREAD_CREATE_DETACHED 1
+
+#define PTHREAD_INHERIT_SCHED 0
+#define PTHREAD_EXPLICIT_SCHED 1
+
+#define PTHREAD_MUTEX_DEFAULT PTHREAD_MUTEX_NORMAL
+#define PTHREAD_MUTEX_NORMAL 0
+#define PTHREAD_MUTEX_ERRORCHECK 1
+#define PTHREAD_MUTEX_RECURSIVE 2
+
+#define PTHREAD_MUTEX_STALLED 0
+#define PTHREAD_MUTEX_ROBUST 1
+
+#define PTHREAD_PRIO_NONE 0
+#define PTHREAD_PRIO_INHERIT 1
+#define PTHREAD_PRIO_PROTECT 2
+
+#define PTHREAD_PROCESS_PRIVATE 0
+#define PTHREAD_PROCESS_SHARED 1
+
+#define PTHREAD_SCOPE_SYSTEM 0
+#define PTHREAD_SCOPE_PROCESS 1
+#endif
+
+#if ! @HAVE_PTHREAD_T@
+
+# if !GNULIB_defined_pthread_functions
+
+/* Provide substitutes for the thread functions that should work
+ adequately on a single-threaded implementation, where
+ pthread_create always fails. The goal is to let programs compile
+ on non-pthread hosts with minimal runtime overhead.
+
+ Omit interfaces that have not been analyzed and for which we do not
+ know what to do, so that they elicit a compile-time error for
+ now. */
+
+_GL_PTHREAD_INLINE int
+pthread_cond_destroy (pthread_cond_t *cond)
+{
+ /* COND is never seriously used. */
+ return 0;
+}
+
+_GL_PTHREAD_INLINE int
+pthread_cond_init (pthread_cond_t *restrict cond,
+ pthread_condattr_t const *restrict attr)
+{
+ /* COND is never seriously used. */
+ return 0;
+}
+
+_GL_PTHREAD_INLINE int
+pthread_cond_signal (pthread_cond_t *cond)
+{
+ /* No threads can currently be blocked on COND. */
+ return 0;
+}
+
+_GL_PTHREAD_INLINE int
+pthread_cond_wait (pthread_cond_t *restrict cond,
+ pthread_mutex_t *restrict mutex)
+{
+ /* Properly-written applications never come here. */
+ abort ();
+ return 0;
+}
+
+_GL_PTHREAD_INLINE int
+pthread_create (pthread_t *restrict thread,
+ pthread_attr_t const *restrict attr,
+ void * (*start_routine) (void*), void *restrict arg)
+{
+ /* Do not create a thread. */
+ return EAGAIN;
+}
+
+_GL_PTHREAD_INLINE void
+pthread_exit (void *value)
+{
+ /* There is just one thread, so the process exits. */
+ exit (0);
+}
+
+_GL_PTHREAD_INLINE int
+pthread_join (pthread_t thread, void **pvalue)
+{
+ /* Properly-written applications never come here. */
+ abort ();
+ return 0;
+}
+
+_GL_PTHREAD_INLINE int
+pthread_mutexattr_destroy (pthread_mutexattr_t *attr)
+{
+ return 0;
+}
+
+_GL_PTHREAD_INLINE int
+pthread_mutexattr_init (pthread_mutexattr_t *attr)
+{
+ return 0;
+}
+
+_GL_PTHREAD_INLINE int
+pthread_mutexattr_settype (pthread_mutexattr_t *attr, int attr_type)
+{
+ return 0;
+}
+
+_GL_PTHREAD_INLINE int
+pthread_mutex_destroy (pthread_mutex_t *mutex)
+{
+ /* MUTEX is never seriously used. */
+ return 0;
+}
+
+_GL_PTHREAD_INLINE int
+pthread_mutex_init (pthread_mutex_t *restrict mutex,
+ pthread_mutexattr_t const *restrict attr)
+{
+ /* MUTEX is never seriously used. */
+ return 0;
+}
+
+_GL_PTHREAD_INLINE int
+pthread_mutex_lock (pthread_mutex_t *mutex)
+{
+ /* There is only one thread, so it always gets the lock. This
+ implementation does not support PTHREAD_MUTEX_ERRORCHECK. */
+ return 0;
+}
+
+_GL_PTHREAD_INLINE int
+pthread_mutex_trylock (pthread_mutex_t *mutex)
+{
+ return pthread_mutex_lock (mutex);
+}
+
+_GL_PTHREAD_INLINE int
+pthread_mutex_unlock (pthread_mutex_t *mutex)
+{
+ /* There is only one thread, so it always unlocks successfully.
+ This implementation does not support robust mutexes or
+ PTHREAD_MUTEX_ERRORCHECK. */
+ return 0;
+}
+
+# define GNULIB_defined_pthread_functions 1
+# endif
+
+#endif
+
+#if ! @HAVE_PTHREAD_SPINLOCK_T@
+
+# if !GNULIB_defined_pthread_spinlock_t
+
+/* Approximate spinlocks with mutexes. */
+
+typedef pthread_mutex_t pthread_spinlock_t;
+
+_GL_PTHREAD_INLINE int
+pthread_spin_init (pthread_spinlock_t *lock, int pshared)
+{
+ return pthread_mutex_init (lock, NULL);
+}
+
+_GL_PTHREAD_INLINE int
+pthread_spin_destroy (pthread_spinlock_t *lock)
+{
+ return pthread_mutex_destroy (lock);
+}
+
+_GL_PTHREAD_INLINE int
+pthread_spin_lock (pthread_spinlock_t *lock)
+{
+ return pthread_mutex_lock (lock);
+}
+
+_GL_PTHREAD_INLINE int
+pthread_spin_trylock (pthread_spinlock_t *lock)
+{
+ return pthread_mutex_trylock (lock);
+}
+
+_GL_PTHREAD_INLINE int
+pthread_spin_unlock (pthread_spinlock_t *lock)
+{
+ return pthread_mutex_unlock (lock);
+}
+
+# define GNULIB_defined_pthread_spinlock_t 1
+# endif
+
+#endif
+
+_GL_INLINE_HEADER_END
+
+#endif /* _@GUARD_PREFIX@_PTHREAD_H_ */
+#endif /* _@GUARD_PREFIX@_PTHREAD_H_ */