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e870aac897
This is an internal function meant to return the number of avaliable
processor where the process can scheduled, different than the
__get_nprocs which returns a the system available online CPU.
The Linux implementation currently only calls __get_nprocs(), which
in tuns calls sched_getaffinity.
Reviewed-by: Florian Weimer <fweimer@redhat.com>
(cherry picked from commit 11a02b035b)
116 lines
3.1 KiB
C
116 lines
3.1 KiB
C
/* System dependent pieces of sysconf; Mach version
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Copyright (C) 1996-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <mach.h>
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#include <hurd.h>
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#include <sys/sysinfo.h>
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/* Return the number of processors configured on the system. */
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int
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__get_nprocs_conf (void)
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{
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struct host_basic_info hbi;
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kern_return_t err;
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mach_msg_type_number_t cnt = HOST_BASIC_INFO_COUNT;
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err = __host_info (__mach_host_self (), HOST_BASIC_INFO,
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(host_info_t) &hbi, &cnt);
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if (err)
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return __hurd_fail (err);
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else if (cnt != HOST_BASIC_INFO_COUNT)
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return __hurd_fail (EIEIO);
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return hbi.max_cpus;
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}
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libc_hidden_def (__get_nprocs_conf)
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weak_alias (__get_nprocs_conf, get_nprocs_conf)
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/* Return the number of processors currently available on the system. */
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int
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__get_nprocs (void)
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{
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struct host_basic_info hbi;
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kern_return_t err;
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mach_msg_type_number_t cnt = HOST_BASIC_INFO_COUNT;
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err = __host_info (__mach_host_self (), HOST_BASIC_INFO,
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(host_info_t) &hbi, &cnt);
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if (err)
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return __hurd_fail (err);
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else if (cnt != HOST_BASIC_INFO_COUNT)
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return __hurd_fail (EIEIO);
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return hbi.avail_cpus;
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}
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libc_hidden_def (__get_nprocs)
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weak_alias (__get_nprocs, get_nprocs)
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int
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__get_nprocs_sched (void)
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{
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return __get_nprocs ();
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}
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/* Return the number of physical pages on the system. */
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long int
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__get_phys_pages (void)
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{
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struct host_basic_info hbi;
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kern_return_t err;
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mach_msg_type_number_t cnt = HOST_BASIC_INFO_COUNT;
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err = __host_info (__mach_host_self (), HOST_BASIC_INFO,
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(host_info_t) &hbi, &cnt);
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if (err)
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return __hurd_fail (err);
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else if (cnt != HOST_BASIC_INFO_COUNT)
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return __hurd_fail (EIEIO);
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return hbi.memory_size / __vm_page_size;
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}
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libc_hidden_def (__get_phys_pages)
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weak_alias (__get_phys_pages, get_phys_pages)
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/* Return the number of available physical pages */
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long int
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__get_avphys_pages (void)
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{
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vm_statistics_data_t vs;
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kern_return_t err;
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#ifdef HOST_VM_INFO
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{
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mach_msg_type_number_t count = HOST_VM_INFO_COUNT;
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err = __host_info (__mach_host_self (), HOST_VM_INFO,
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(host_info_t) &vs, &count);
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if (!err && count < HOST_VM_INFO_COUNT)
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err = EGRATUITOUS;
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}
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#else
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err = __vm_statistics (__mach_task_self (), &vs);
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#endif
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if (err)
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return __hurd_fail (err);
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return vs.free_count;
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}
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libc_hidden_def (__get_avphys_pages)
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weak_alias (__get_avphys_pages, get_avphys_pages)
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