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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-05 18:37:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-05 18:37:14 +0000 |
commit | ea648e70a989cca190cd7403fe892fd2dcc290b4 (patch) | |
tree | e2b6b1c647da68b0d4d66082835e256eb30970e8 /lib/isc/unix/os.c | |
parent | Initial commit. (diff) | |
download | bind9-ea648e70a989cca190cd7403fe892fd2dcc290b4.tar.xz bind9-ea648e70a989cca190cd7403fe892fd2dcc290b4.zip |
Adding upstream version 1:9.11.5.P4+dfsg.upstream/1%9.11.5.P4+dfsgupstream
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.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/lib/isc/unix/os.c b/lib/isc/unix/os.c new file mode 100644 index 0000000..8cff6b6 --- /dev/null +++ b/lib/isc/unix/os.c @@ -0,0 +1,87 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * 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 http://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + + +#include <config.h> + +#include <isc/os.h> + + +#ifdef HAVE_SYSCONF + +#include <unistd.h> + +#ifndef __hpux +static inline 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 + return (0); +#endif +} +#endif +#endif /* HAVE_SYSCONF */ + + +#ifdef __hpux + +#include <sys/pstat.h> + +static inline int +hpux_ncpus(void) { + struct pst_dynamic psd; + if (pstat_getdynamic(&psd, sizeof(psd), 1, 0) != -1) + return (psd.psd_proc_cnt); + else + return (0); +} + +#endif /* __hpux */ + +#if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME) +#include <sys/types.h> /* for FreeBSD */ +#include <sys/param.h> /* for NetBSD */ +#include <sys/sysctl.h> + +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 + +unsigned int +isc_os_ncpus(void) { + long ncpus = 0; + +#ifdef __hpux + ncpus = hpux_ncpus(); +#elif defined(HAVE_SYSCONF) + ncpus = sysconf_ncpus(); +#endif +#if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME) + if (ncpus <= 0) + ncpus = sysctl_ncpus(); +#endif + if (ncpus <= 0) + ncpus = 1; + + return ((unsigned int)ncpus); +} |