Add an unpatched version of xz, XZ Utils, to /trunk/deps/third_party

xz/src/common/tuklib_cpucores.c

+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       tuklib_cpucores.c
+/// \brief      Get the number of CPU cores online
+//
+//  Author:     Lasse Collin
+//
+//  This file has been put into the public domain.
+//  You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "tuklib_cpucores.h"
+
+#if defined(TUKLIB_CPUCORES_SYSCTL)
+#       ifdef HAVE_SYS_PARAM_H
+#               include <sys/param.h>
+#       endif
+#       include <sys/sysctl.h>
+
+#elif defined(TUKLIB_CPUCORES_SYSCONF)
+#       include <unistd.h>
+
+// HP-UX
+#elif defined(TUKLIB_CPUCORES_PSTAT_GETDYNAMIC)
+#       include <sys/param.h>
+#       include <sys/pstat.h>
+#endif
+
+
+extern uint32_t
+tuklib_cpucores(void)
+{
+        uint32_t ret = 0;
+
+#if defined(TUKLIB_CPUCORES_SYSCTL)
+        int name[2] = { CTL_HW, HW_NCPU };
+        int cpus;
+        size_t cpus_size = sizeof(cpus);
+        if (sysctl(name, 2, &cpus, &cpus_size, NULL, 0) != -1
+                        && cpus_size == sizeof(cpus) && cpus > 0)
+                ret = cpus;
+
+#elif defined(TUKLIB_CPUCORES_SYSCONF)
+#       ifdef _SC_NPROCESSORS_ONLN
+        // Most systems
+        const long cpus = sysconf(_SC_NPROCESSORS_ONLN);
+#       else
+        // IRIX
+        const long cpus = sysconf(_SC_NPROC_ONLN);
+#       endif
+        if (cpus > 0)
+                ret = cpus;
+
+#elif defined(TUKLIB_CPUCORES_PSTAT_GETDYNAMIC)
+        struct pst_dynamic pst;
+        if (pstat_getdynamic(&pst, sizeof(pst), 1, 0) != -1)
+                ret = pst.psd_proc_cnt;
+#endif
+
+        return ret;
+}