2 This file is a part of libcds - Concurrent Data Structures library
4 (C) Copyright Maxim Khizhinsky (libcds.dev@gmail.com) 2006-2017
6 Source code repo: http://github.com/khizmax/libcds/
7 Download: http://sourceforge.net/projects/libcds/files/
9 Redistribution and use in source and binary forms, with or without
10 modification, are permitted provided that the following conditions are met:
12 * Redistributions of source code must retain the above copyright notice, this
13 list of conditions and the following disclaimer.
15 * Redistributions in binary form must reproduce the above copyright notice,
16 this list of conditions and the following disclaimer in the documentation
17 and/or other materials provided with the distribution.
19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
23 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
25 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
26 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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28 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #ifndef CDSLIB_OS_FREE_BSD_TOPOLOGY_H
32 #define CDSLIB_OS_FREE_BSD_TOPOLOGY_H
34 #ifndef CDSLIB_OS_TOPOLOGY_H
35 # error "<cds/os/topology.h> must be included instead"
38 #include <cds/os/details/fake_topology.h>
40 #include <sys/types.h>
41 #include <sys/sysctl.h>
43 namespace cds { namespace OS {
45 /// FreeBSD-specific wrappers
46 CDS_CXX11_INLINE_NAMESPACE namespace Free_BSD {
50 The implementation assumes that processor IDs are in numerical order
51 from 0 to N - 1, where N - count of processor in the system
53 struct topology: public OS::details::fake_topology
57 typedef OS::details::fake_topology base_class;
61 /// Logical processor count for the system
62 static unsigned int processor_count()
66 /* set the mib for hw.ncpu */
70 size_t len = sizeof(nCPU);
72 /* get the number of CPUs from the system */
73 return ::sysctl( mib, 2, &nCPU, &len, nullptr, 0 ) == 0 && nCPU > 0 ? (unsigned int)nCPU : 1;
76 /// Get current processor number
78 Caveat: FreeBSD has no "get current processor number" system call.
79 The function emulates "current processor number" using thread-specific data.
81 static unsigned int current_processor()
83 return base_class::current_processor();
86 /// Synonym for \ref current_processor
87 static unsigned int native_current_processor()
89 return current_processor();
99 } // namespace Free_BSD
101 #ifndef CDS_CXX11_INLINE_NAMESPACE_SUPPORT
102 using Free_BSD::topology;
104 }} // namespace cds::OS
106 #endif // #ifndef CDSLIB_OS_FREE_BSD_TOPOLOGY_H