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https://github.com/MariaDB/server.git
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3d6eb7afcf
This fixed the MySQL bug# 20338 about misuse of double underscore prefix __WIN__, which was old MySQL's idea of identifying Windows Replace it by _WIN32 standard symbol for targeting Windows OS (both 32 and 64 bit) Not that connect storage engine is not fixed in this patch (must be fixed in "upstream" branch)
85 lines
2.4 KiB
C
85 lines
2.4 KiB
C
/*
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Copyright (c) 2006, 2010, Oracle and/or its affiliates
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
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/* get the number of (online) CPUs */
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#include "mysys_priv.h"
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if defined(__FreeBSD__) && defined(HAVE_PTHREAD_GETAFFINITY_NP)
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#include <pthread_np.h>
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#include <sys/cpuset.h>
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#endif
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static int ncpus=0;
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int my_getncpus(void)
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{
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if (!ncpus)
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{
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/*
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First attempt to get the total number of available cores. sysconf is
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the fallback, but it can return a larger number. It will return the
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total number of cores, not the ones available to the process - as
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configured via core affinity.
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*/
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#if (defined(__linux__) || defined(__FreeBSD__)) && defined(HAVE_PTHREAD_GETAFFINITY_NP)
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#ifdef __linux__
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cpu_set_t set;
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#else
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cpuset_t set;
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#endif
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if (pthread_getaffinity_np(pthread_self(), sizeof(set), &set) == 0)
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{
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#ifdef CPU_COUNT
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/* CPU_COUNT was introduced with glibc 2.6. */
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ncpus= CPU_COUNT(&set);
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#else
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/* Implementation for platforms with glibc < 2.6 */
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size_t i;
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for (i= 0; i < CPU_SETSIZE; i++)
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if (CPU_ISSET(i, &set))
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ncpus++;
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#endif
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return ncpus;
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}
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#endif /* (__linux__ || __FreeBSD__) && HAVE_PTHREAD_GETAFFINITY_NP */
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#ifdef _SC_NPROCESSORS_ONLN
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ncpus= sysconf(_SC_NPROCESSORS_ONLN);
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#elif defined(_WIN32)
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SYSTEM_INFO sysinfo;
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/*
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We are not calling GetNativeSystemInfo here because (1) we
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don't believe that they return different values for number
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of processors and (2) if WOW64 limits processors for Win32
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then we don't want to try to override that.
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*/
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GetSystemInfo(&sysinfo);
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ncpus= sysinfo.dwNumberOfProcessors;
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#else
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/* Unknown so play safe: assume SMP and forbid uniprocessor build */
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ncpus= 2;
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#endif
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}
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return ncpus;
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}
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