libsyscall/wrappers/remove-counter.c

   1 /*
   2  * Copyright (c) 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 <sys/types.h>
  25 #if defined(__arm__)
  26 #include <arm/arch.h>
  27 #endif
  28
  29 #if defined(__ppc64__) || defined(__i386__) || defined(__x86_64__)
  30 static int64_t __remove_counter = 0;
  31 #else
  32 static int32_t __remove_counter = 0;
  33 #endif
  34
  35 __uint64_t
  36 __get_remove_counter(void)
  37 {
  38 #if defined(__arm__) && !defined(_ARM_ARCH_6)
  39         return __remove_counter;
  40 #else
  41         return __sync_add_and_fetch(&__remove_counter, 0);
  42 #endif
  43 }
  44
  45 void
  46 __inc_remove_counter(void)
  47 {
  48 #if defined(__arm__) && !defined(_ARM_ARCH_6)
  49         __remove_counter++;
  50 #else
  51         __sync_add_and_fetch(&__remove_counter, 1);
  52 #endif
  53 }