1 /* 2 * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the author nor the names of any co-contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <stdio.h> 34 35 #include "spinlock.h" 36 #include "libc_private.h" 37 38 long _atomic_lock_stub(volatile long *); 39 void _spinlock_stub(spinlock_t *); 40 void _spinunlock_stub(spinlock_t *); 41 void _spinlock_debug_stub(spinlock_t *, char *, int); 42 43 __weak_reference(_atomic_lock_stub, _atomic_lock); 44 45 long 46 _atomic_lock_stub(volatile long *lck __unused) 47 { 48 return (0L); 49 } 50 51 __weak_reference(_spinlock, _spinlock_debug); 52 #pragma weak _spinlock 53 void 54 _spinlock(spinlock_t *lck) 55 { 56 57 ((void (*)(spinlock_t *lck))__libc_interposing[INTERPOS_spinlock]) 58 (lck); 59 60 } 61 62 #pragma weak _spinunlock 63 void 64 _spinunlock(spinlock_t *lck) 65 { 66 67 ((void (*)(spinlock_t *lck))__libc_interposing[INTERPOS_spinunlock]) 68 (lck); 69 70 } 71 72 void 73 __libc_spinlock_stub(spinlock_t *lck __unused) 74 { 75 } 76 77 void 78 __libc_spinunlock_stub(spinlock_t *lck __unused) 79 { 80 } 81