i386/sys/spinlocks.c

   1 /*
   2  * Copyright (c) 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #include <machine/cpu_capabilities.h>
  25 #include <platfunc.h>
  26
  27 #define RESOLVER_UP_MP(symbol)  \
  28         PLATFUNC_DESCRIPTOR_PROTOTYPE(symbol, up); \
  29         PLATFUNC_DESCRIPTOR_PROTOTYPE(symbol, mp); \
  30         static const platfunc_descriptor* symbol ## _platfunc_descriptors[] = { \
  31                 PLATFUNC_DESCRIPTOR_REFERENCE(symbol, mp), \
  32                 PLATFUNC_DESCRIPTOR_REFERENCE(symbol, up), \
  33                 0 \
  34         }; \
  35         void* symbol ## _chooser() __asm__("_" #symbol); \
  36         void* symbol ## _chooser() { \
  37                 __asm__(".symbol_resolver _" #symbol); \
  38                 return find_platform_function((const platfunc_descriptor**) symbol ## _platfunc_descriptors); \
  39         }
  40
  41 RESOLVER_UP_MP(OSSpinLockTry)
  42 RESOLVER_UP_MP(_spin_lock_try)
  43 RESOLVER_UP_MP(OSSpinLockLock)
  44 RESOLVER_UP_MP(_spin_lock)
  45 RESOLVER_UP_MP(spin_lock)