1 files changed, 96 insertions, 0 deletions
diff --git a/REORG.TODO/mach/lock-intern.h b/REORG.TODO/mach/lock-intern.h
new file mode 100644
index 0000000000..94f306d31a
--- /dev/null
+++ b/REORG.TODO/mach/lock-intern.h
@@ -0,0 +1,96 @@
+/* Copyright (C) 1994-2017 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _LOCK_INTERN_H
+#define	_LOCK_INTERN_H
+
+#include <sys/cdefs.h>
+#include <machine-lock.h>
+
+#ifndef _EXTERN_INLINE
+#define _EXTERN_INLINE __extern_inline
+#endif
+
+
+/* Initialize LOCK.  */
+
+_EXTERN_INLINE void
+__spin_lock_init (__spin_lock_t *__lock)
+{
+  *__lock = __SPIN_LOCK_INITIALIZER;
+}
+
+
+/* Lock LOCK, blocking if we can't get it.  */
+extern void __spin_lock_solid (__spin_lock_t *__lock);
+
+/* Lock the spin lock LOCK.  */
+
+_EXTERN_INLINE void
+__spin_lock (__spin_lock_t *__lock)
+{
+  if (! __spin_try_lock (__lock))
+    __spin_lock_solid (__lock);
+}
+
+/* Name space-clean internal interface to mutex locks.
+
+   Code internal to the C library uses these functions to lock and unlock
+   mutex locks.  These locks are of type `struct mutex', defined in
+   <cthreads.h>.  The functions here are name space-clean.  If the program
+   is linked with the cthreads library, `__mutex_lock_solid' and
+   `__mutex_unlock_solid' will invoke the corresponding cthreads functions
+   to implement real mutex locks.  If not, simple stub versions just use
+   spin locks.  */
+
+
+/* Initialize the newly allocated mutex lock LOCK for further use.  */
+extern void __mutex_init (void *__lock);
+
+/* Lock LOCK, blocking if we can't get it.  */
+extern void __mutex_lock_solid (void *__lock);
+
+/* Finish unlocking LOCK, after the spin lock LOCK->held has already been
+   unlocked.  This function will wake up any thread waiting on LOCK.  */
+extern void __mutex_unlock_solid (void *__lock);
+
+/* Lock the mutex lock LOCK.  */
+
+_EXTERN_INLINE void
+__mutex_lock (void *__lock)
+{
+  if (! __spin_try_lock ((__spin_lock_t *) __lock))
+    __mutex_lock_solid (__lock);
+}
+
+/* Unlock the mutex lock LOCK.  */
+
+_EXTERN_INLINE void
+__mutex_unlock (void *__lock)
+{
+  __spin_unlock ((__spin_lock_t *) __lock);
+  __mutex_unlock_solid (__lock);
+}
+
+
+_EXTERN_INLINE int
+__mutex_trylock (void *__lock)
+{
+  return __spin_try_lock ((__spin_lock_t *) __lock);
+}
+
+#endif /* lock-intern.h */