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