Import libpthread.

1 files changed, 139 insertions, 0 deletions

diff --git a/sysdeps/generic/bits/mutex.h b/sysdeps/generic/bits/mutex.h
new file mode 100644
index 0000000..2baf040
--- /dev/null
+++ b/sysdeps/generic/bits/mutex.h
@@ -0,0 +1,139 @@
+/* Mutex type.  Generic version.
+   Copyright (C) 2000,02 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef _BITS_MUTEX_H
+
+#ifndef __need_pthread_mutex
+# define _BITS_MUTEX_H	1
+#endif
+
+#ifndef __pthread_mutex_defined
+# if defined __need_pthread_mutex || defined _BITS_MUTEX_H
+#  undef __need_pthread_mutex
+#  define __pthread_mutex_defined
+
+#  include <bits/spin-lock.h>
+#  include <bits/mutex-attr.h>
+
+/* User visible part of a mutex.  */
+struct __pthread_mutex
+  {
+    __pthread_spinlock_t __held;
+    __pthread_spinlock_t __lock;
+    /* In cthreads, mutex_init does not initialized thre third
+       pointer, as such, we cannot rely on its value for anything.  */
+    char *cthreadscompat1;
+    struct __pthread *__queue;
+    struct __pthread_mutexattr *attr;
+    void *data;
+    /*  Up to this point, we are completely compatible with cthreads
+	and what libc expects.  */
+    void *owner;
+    unsigned locks;
+    /* If NULL then the default attributes apply.  */
+  };
+
+/* Initializer for a mutex.  N.B.  this also happens to be compatible
+   with the cthread mutex initializer.  */
+#  define __PTHREAD_MUTEX_INITIALIZER \
+    ((struct __pthread_mutex) \
+      { __SPIN_LOCK_INITIALIZER, __SPIN_LOCK_INITIALIZER, NULL, NULL, NULL, \
+	NULL, 0, 0 })
+
+# endif
+#endif /* Not __pthread_mutex_defined.  */
+
+#ifdef _BITS_MUTEX_H
+
+#include <errno.h>
+#include <stddef.h>
+
+#ifdef __USE_EXTERN_INLINES
+
+# ifndef _EXTERN_INLINE
+#  define _EXTERN_INLINE extern __inline
+# endif
+
+_EXTERN_INLINE int
+pthread_mutex_init (struct __pthread_mutex *__mutex,
+		    const pthread_mutexattr_t *attr)
+{
+  extern int _pthread_mutex_init (struct __pthread_mutex *,
+				  const pthread_mutexattr_t *);
+
+  if (attr)
+    return _pthread_mutex_init (__mutex, attr);
+
+  *__mutex = __PTHREAD_MUTEX_INITIALIZER;
+  return 0;
+}
+
+_EXTERN_INLINE int
+pthread_mutex_destroy (struct __pthread_mutex *__mutex)
+{
+  extern int _pthread_mutex_destroy (struct __pthread_mutex *);
+
+  if (__mutex->attr || __mutex->data)
+    return _pthread_mutex_destroy (__mutex);
+
+  return 0;
+}
+
+_EXTERN_INLINE int
+__pthread_mutex_lock (struct __pthread_mutex *__mutex)
+{
+  extern int _pthread_mutex_lock (struct __pthread_mutex *);
+  
+  if (__mutex->attr == NULL
+      && __mutex->data == NULL
+      && __pthread_spin_trylock (&__mutex->__held) == 0)
+    return 0;
+
+  return _pthread_mutex_lock (__mutex);
+}
+
+extern inline int
+__pthread_mutex_trylock (struct __pthread_mutex *__mutex)
+{
+  extern int _pthread_mutex_trylock (struct __pthread_mutex *);
+  
+  if (__mutex->attr == NULL
+      && __mutex->data == NULL)
+    return __pthread_spin_trylock (&__mutex->__held);
+
+  return _pthread_mutex_trylock (__mutex);
+}
+
+extern inline int
+pthread_mutex_lock (struct __pthread_mutex *__mutex)
+{
+  return __pthread_mutex_lock (__mutex);
+}
+
+extern inline int
+pthread_mutex_trylock (struct __pthread_mutex *__mutex)
+{
+  return __pthread_mutex_trylock (__mutex);
+}
+
+#endif /* Use extern inlines.  */
+
+#endif
+
+#endif /* bits/mutex.h */