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