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 37 long _atomic_lock_stub(volatile long *); 38 void _spinlock_stub(spinlock_t *); 39 void _spinunlock_stub(spinlock_t *); 40 void _spinlock_debug_stub(spinlock_t *, char *, int); 41 42 /* 43 * Declare weak definitions in case the application is not linked 44 * with libpthread. 45 */ 46 __weak_reference(_atomic_lock_stub, _atomic_lock); 47 __weak_reference(_spinlock_stub, _spinlock); 48 __weak_reference(_spinunlock_stub, _spinunlock); 49 __weak_reference(_spinlock_debug_stub, _spinlock_debug); 50 51 /* 52 * This function is a stub for the _atomic_lock function in libpthread. 53 */ 54 long 55 _atomic_lock_stub(volatile long *lck __unused) 56 { 57 return (0L); 58 } 59 60 61 /* 62 * This function is a stub for the spinlock function in libpthread. 63 */ 64 void 65 _spinlock_stub(spinlock_t *lck __unused) 66 { 67 } 68 69 /* 70 * This function is a stub for the spinunlock function in libpthread. 71 */ 72 void 73 _spinunlock_stub(spinlock_t *lck __unused) 74 { 75 } 76 77 /* 78 * This function is a stub for the debug spinlock function in libpthread. 79 */ 80 void 81 _spinlock_debug_stub(spinlock_t *lck __unused, char *fname __unused, int lineno __unused) 82 { 83 } 84