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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 07:24:22 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 07:24:22 +0000
commit45d6379135504814ab723b57f0eb8be23393a51d (patch)
treed4f2ec4acca824a8446387a758b0ce4238a4dffa /lib/isc/unix/os.c
parentInitial commit. (diff)
downloadbind9-45d6379135504814ab723b57f0eb8be23393a51d.tar.xz
bind9-45d6379135504814ab723b57f0eb8be23393a51d.zip
Adding upstream version 1:9.16.44.upstream/1%9.16.44upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'lib/isc/unix/os.c')
-rw-r--r--lib/isc/unix/os.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/lib/isc/unix/os.c b/lib/isc/unix/os.c
new file mode 100644
index 0000000..5577587
--- /dev/null
+++ b/lib/isc/unix/os.c
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, you can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+#include <isc/os.h>
+
+#ifdef HAVE_SYSCONF
+
+#include <unistd.h>
+
+static long
+sysconf_ncpus(void) {
+#if defined(_SC_NPROCESSORS_ONLN)
+ return (sysconf((_SC_NPROCESSORS_ONLN)));
+#elif defined(_SC_NPROC_ONLN)
+ return (sysconf((_SC_NPROC_ONLN)));
+#else /* if defined(_SC_NPROCESSORS_ONLN) */
+ return (0);
+#endif /* if defined(_SC_NPROCESSORS_ONLN) */
+}
+#endif /* HAVE_SYSCONF */
+
+#if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME)
+#include <sys/param.h> /* for NetBSD */
+#include <sys/sysctl.h>
+#include <sys/types.h> /* for FreeBSD */
+
+static int
+sysctl_ncpus(void) {
+ int ncpu, result;
+ size_t len;
+
+ len = sizeof(ncpu);
+ result = sysctlbyname("hw.ncpu", &ncpu, &len, 0, 0);
+ if (result != -1) {
+ return (ncpu);
+ }
+ return (0);
+}
+#endif /* if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME) */
+
+unsigned int
+isc_os_ncpus(void) {
+ long ncpus = 0;
+
+#if defined(HAVE_SYSCONF)
+ ncpus = sysconf_ncpus();
+#endif /* if defined(HAVE_SYSCONF) */
+#if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME)
+ if (ncpus <= 0) {
+ ncpus = sysctl_ncpus();
+ }
+#endif /* if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME) */
+ if (ncpus <= 0) {
+ ncpus = 1;
+ }
+
+ return ((unsigned int)ncpus);
+}