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2000-09-05  Wolfram Gloger  <wg@malloc.de>

	* malloc/thread-m.h [_LIBC]: Even if not linking with libpthread,
	ensure usability of mutex as an `in use' flag.
This commit is contained in:
Ulrich Drepper 2000-09-10 18:43:37 +00:00
parent 2119c7059e
commit 6fb7c68eb5
2 changed files with 18 additions and 5 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2000-09-05 Wolfram Gloger <wg@malloc.de>
* malloc/thread-m.h [_LIBC]: Even if not linking with libpthread,
ensure usability of mutex as an `in use' flag.
2000-09-10 Ulrich Drepper <drepper@redhat.com>
* shlib-versions: Simplify libm entries. Correct a few Hurd entries.

18
malloc/thread-m.h
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@ -1,6 +1,6 @@
/* Basic platform-independent macro definitions for mutexes and
thread-specific data.
Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
Copyright (C) 1996, 1997, 1998, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Wolfram Gloger <wmglo@dent.med.uni-muenchen.de>, 1996.
@ -42,14 +42,22 @@ typedef pthread_mutex_t mutex_t;
#define MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
/* Even if not linking with libpthread, ensure usability of mutex as
an `in use' flag, see also the NO_THREADS case below. Assume
pthread_mutex_t is at least one int wide. */
#define mutex_init(m) \
(__pthread_mutex_init != NULL ? __pthread_mutex_init (m, NULL) : 0)
(__pthread_mutex_init != NULL \
? __pthread_mutex_init (m, NULL) : (*(int *)(m) = 0))
#define mutex_lock(m) \
(__pthread_mutex_lock != NULL ? __pthread_mutex_lock (m) : 0)
(__pthread_mutex_lock != NULL \
? __pthread_mutex_lock (m) : ((*(int *)(m) = 1), 0))
#define mutex_trylock(m) \
(__pthread_mutex_trylock != NULL ? __pthread_mutex_trylock (m) : 0)
(__pthread_mutex_trylock != NULL \
? __pthread_mutex_trylock (m) : (*(int *)(m) ? 1 : ((*(int *)(m) = 1), 0)))
#define mutex_unlock(m) \
(__pthread_mutex_unlock != NULL ? __pthread_mutex_unlock (m) : 0)
(__pthread_mutex_unlock != NULL \
? __pthread_mutex_unlock (m) : (*(int*)(m) = 0))
#define thread_atfork(prepare, parent, child) \
(__pthread_atfork != NULL ? __pthread_atfork(prepare, parent, child) : 0)