BRE12
macos_common.h
1 /*
2  Copyright 2005-2016 Intel Corporation. All Rights Reserved.
3 
4  This file is part of Threading Building Blocks. Threading Building Blocks is free software;
5  you can redistribute it and/or modify it under the terms of the GNU General Public License
6  version 2 as published by the Free Software Foundation. Threading Building Blocks is
7  distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the
8  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
9  See the GNU General Public License for more details. You should have received a copy of
10  the GNU General Public License along with Threading Building Blocks; if not, write to the
11  Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
12 
13  As a special exception, you may use this file as part of a free software library without
14  restriction. Specifically, if other files instantiate templates or use macros or inline
15  functions from this file, or you compile this file and link it with other files to produce
16  an executable, this file does not by itself cause the resulting executable to be covered
17  by the GNU General Public License. This exception does not however invalidate any other
18  reasons why the executable file might be covered by the GNU General Public License.
19 */
20 
21 #if !defined(__TBB_machine_H) || defined(__TBB_machine_macos_common_H)
22 #error Do not #include this internal file directly; use public TBB headers instead.
23 #endif
24 
25 #define __TBB_machine_macos_common_H
26 
27 #include <sched.h>
28 #define __TBB_Yield() sched_yield()
29 
30 // __TBB_HardwareConcurrency
31 
32 #include <sys/types.h>
33 #include <sys/sysctl.h>
34 
35 static inline int __TBB_macos_available_cpu() {
36  int name[2] = {CTL_HW, HW_AVAILCPU};
37  int ncpu;
38  size_t size = sizeof(ncpu);
39  sysctl( name, 2, &ncpu, &size, NULL, 0 );
40  return ncpu;
41 }
42 
43 #define __TBB_HardwareConcurrency() __TBB_macos_available_cpu()
44 
45 #ifndef __TBB_full_memory_fence
46  // TBB has not recognized the architecture (none of the architecture abstraction
47  // headers was included).
48  #define __TBB_UnknownArchitecture 1
49 #endif
50 
51 #if __TBB_UnknownArchitecture
52 // Implementation of atomic operations based on OS provided primitives
53 #include <libkern/OSAtomic.h>
54 
55 static inline int64_t __TBB_machine_cmpswp8_OsX(volatile void *ptr, int64_t value, int64_t comparand)
56 {
57  __TBB_ASSERT( tbb::internal::is_aligned(ptr,8), "address not properly aligned for OS X* atomics");
58  int64_t* address = (int64_t*)ptr;
59  while( !OSAtomicCompareAndSwap64Barrier(comparand, value, address) ){
60 #if __TBB_WORDSIZE==8
61  int64_t snapshot = *address;
62 #else
63  int64_t snapshot = OSAtomicAdd64( 0, address );
64 #endif
65  if( snapshot!=comparand ) return snapshot;
66  }
67  return comparand;
68 }
69 
70 #define __TBB_machine_cmpswp8 __TBB_machine_cmpswp8_OsX
71 
72 #endif /* __TBB_UnknownArchitecture */
73 
74 #if __TBB_UnknownArchitecture
75 
76 #ifndef __TBB_WORDSIZE
77 #define __TBB_WORDSIZE __SIZEOF_POINTER__
78 #endif
79 
80 #ifdef __TBB_ENDIANNESS
81  // Already determined based on hardware architecture.
82 #elif __BIG_ENDIAN__
83  #define __TBB_ENDIANNESS __TBB_ENDIAN_BIG
84 #elif __LITTLE_ENDIAN__
85  #define __TBB_ENDIANNESS __TBB_ENDIAN_LITTLE
86 #else
87  #define __TBB_ENDIANNESS __TBB_ENDIAN_UNSUPPORTED
88 #endif
89 
95 #define __TBB_control_consistency_helper() OSMemoryBarrier()
96 #define __TBB_acquire_consistency_helper() OSMemoryBarrier()
97 #define __TBB_release_consistency_helper() OSMemoryBarrier()
98 #define __TBB_full_memory_fence() OSMemoryBarrier()
99 
100 static inline int32_t __TBB_machine_cmpswp4(volatile void *ptr, int32_t value, int32_t comparand)
101 {
102  __TBB_ASSERT( tbb::internal::is_aligned(ptr,4), "address not properly aligned for OS X* atomics");
103  int32_t* address = (int32_t*)ptr;
104  while( !OSAtomicCompareAndSwap32Barrier(comparand, value, address) ){
105  int32_t snapshot = *address;
106  if( snapshot!=comparand ) return snapshot;
107  }
108  return comparand;
109 }
110 
111 static inline int32_t __TBB_machine_fetchadd4(volatile void *ptr, int32_t addend)
112 {
113  __TBB_ASSERT( tbb::internal::is_aligned(ptr,4), "address not properly aligned for OS X* atomics");
114  return OSAtomicAdd32Barrier(addend, (int32_t*)ptr) - addend;
115 }
116 
117 static inline int64_t __TBB_machine_fetchadd8(volatile void *ptr, int64_t addend)
118 {
119  __TBB_ASSERT( tbb::internal::is_aligned(ptr,8), "address not properly aligned for OS X* atomics");
120  return OSAtomicAdd64Barrier(addend, (int64_t*)ptr) - addend;
121 }
122 
123 #define __TBB_USE_GENERIC_PART_WORD_CAS 1
124 #define __TBB_USE_GENERIC_PART_WORD_FETCH_ADD 1
125 #define __TBB_USE_GENERIC_FETCH_STORE 1
126 #define __TBB_USE_GENERIC_HALF_FENCED_LOAD_STORE 1
127 #define __TBB_USE_GENERIC_RELAXED_LOAD_STORE 1
128 #if __TBB_WORDSIZE == 4
129  #define __TBB_USE_GENERIC_DWORD_LOAD_STORE 1
130 #endif
131 #define __TBB_USE_GENERIC_SEQUENTIAL_CONSISTENCY_LOAD_STORE 1
132 
133 #endif /* __TBB_UnknownArchitecture */