status-go/vendor/github.com/tklauser/go-sysconf/sysconf_darwin.go

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// Copyright 2018 Tobias Klauser. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package sysconf
import (
"golang.org/x/sys/unix"
)
const (
_HOST_NAME_MAX = _MAXHOSTNAMELEN - 1
_LOGIN_NAME_MAX = _MAXLOGNAME
_SYMLOOP_MAX = _MAXSYMLINKS
)
// sysconf implements sysconf(3) as in the Darwin libc, version 1244.30.3
// (derived from the FreeBSD libc).
func sysconf(name int) (int64, error) {
switch name {
case SC_AIO_LISTIO_MAX:
fallthrough
case SC_AIO_MAX:
return sysctl32("kern.aiomax"), nil
case SC_AIO_PRIO_DELTA_MAX:
return -1, nil
case SC_ARG_MAX:
return sysctl32("kern.argmax"), nil
case SC_ATEXIT_MAX:
return _INT_MAX, nil
case SC_CHILD_MAX:
var rlim unix.Rlimit
if err := unix.Getrlimit(unix.RLIMIT_NPROC, &rlim); err == nil {
if rlim.Cur != unix.RLIM_INFINITY {
return int64(rlim.Cur), nil
}
}
return -1, nil
case SC_CLK_TCK:
return _CLK_TCK, nil
case SC_DELAYTIMER_MAX:
return -1, nil
case SC_GETGR_R_SIZE_MAX:
return 4096, nil
case SC_GETPW_R_SIZE_MAX:
return 4096, nil
case SC_IOV_MAX:
return _IOV_MAX, nil
case SC_MQ_OPEN_MAX:
return -1, nil
case SC_MQ_PRIO_MAX:
return -1, nil
case SC_NGROUPS_MAX:
return sysctl32("kern.ngroups"), nil
case SC_OPEN_MAX, SC_STREAM_MAX:
var rlim unix.Rlimit
if err := unix.Getrlimit(unix.RLIMIT_NOFILE, &rlim); err == nil {
if rlim.Cur != unix.RLIM_INFINITY {
return int64(rlim.Cur), nil
}
}
return -1, nil
case SC_RTSIG_MAX:
return -1, nil
case SC_SEM_NSEMS_MAX:
return sysctl32("kern.sysv.semmns"), nil
case SC_SEM_VALUE_MAX:
return _POSIX_SEM_VALUE_MAX, nil
case SC_SIGQUEUE_MAX:
return -1, nil
case SC_THREAD_DESTRUCTOR_ITERATIONS:
return _PTHREAD_DESTRUCTOR_ITERATIONS, nil
case SC_THREAD_KEYS_MAX:
return _PTHREAD_KEYS_MAX, nil
case SC_THREAD_PRIO_INHERIT:
return _POSIX_THREAD_PRIO_INHERIT, nil
case SC_THREAD_PRIO_PROTECT:
return _POSIX_THREAD_PRIO_PROTECT, nil
case SC_THREAD_STACK_MIN:
return _PTHREAD_STACK_MIN, nil
case SC_THREAD_THREADS_MAX:
return -1, nil
case SC_TIMER_MAX:
return -1, nil
case SC_TTY_NAME_MAX:
// should be _PATH_DEV instead of "/"
return pathconf("/", _PC_NAME_MAX), nil
case SC_TZNAME_MAX:
return pathconf(_PATH_ZONEINFO, _PC_NAME_MAX), nil
case SC_IPV6:
if _POSIX_IPV6 == 0 {
fd, err := unix.Socket(unix.AF_INET6, unix.SOCK_DGRAM, 0)
if err == nil && fd >= 0 {
unix.Close(fd)
return int64(200112), nil
}
return 0, nil
}
return _POSIX_IPV6, nil
case SC_MESSAGE_PASSING:
if _POSIX_MESSAGE_PASSING == 0 {
return yesno(sysctl32("p1003_1b.message_passing")), nil
}
return _POSIX_MESSAGE_PASSING, nil
case SC_PRIORITIZED_IO:
if _POSIX_PRIORITIZED_IO == 0 {
return yesno(sysctl32("p1003_1b.prioritized_io")), nil
}
return _POSIX_PRIORITIZED_IO, nil
case SC_PRIORITY_SCHEDULING:
if _POSIX_PRIORITY_SCHEDULING == 0 {
return yesno(sysctl32("p1003_1b.priority_scheduling")), nil
}
return _POSIX_PRIORITY_SCHEDULING, nil
case SC_REALTIME_SIGNALS:
if _POSIX_REALTIME_SIGNALS == 0 {
return yesno(sysctl32("p1003_1b.realtime_signals")), nil
}
return _POSIX_REALTIME_SIGNALS, nil
case SC_SAVED_IDS:
return yesno(sysctl32("kern.saved_ids")), nil
case SC_SEMAPHORES:
if _POSIX_SEMAPHORES == 0 {
return yesno(sysctl32("p1003_1b.semaphores")), nil
}
return _POSIX_SEMAPHORES, nil
case SC_SPAWN:
return _POSIX_SPAWN, nil
case SC_SPIN_LOCKS:
return _POSIX_SPIN_LOCKS, nil
case SC_SPORADIC_SERVER:
return _POSIX_SPORADIC_SERVER, nil
case SC_SS_REPL_MAX:
return _POSIX_SS_REPL_MAX, nil
case SC_SYNCHRONIZED_IO:
if _POSIX_SYNCHRONIZED_IO == 0 {
return yesno(sysctl32("p1003_1b.synchronized_io")), nil
}
return _POSIX_SYNCHRONIZED_IO, nil
case SC_THREAD_ATTR_STACKADDR:
return _POSIX_THREAD_ATTR_STACKADDR, nil
case SC_THREAD_ATTR_STACKSIZE:
return _POSIX_THREAD_ATTR_STACKSIZE, nil
case SC_THREAD_CPUTIME:
return _POSIX_THREAD_CPUTIME, nil
case SC_THREAD_PRIORITY_SCHEDULING:
return _POSIX_THREAD_PRIORITY_SCHEDULING, nil
case SC_THREAD_PROCESS_SHARED:
return _POSIX_THREAD_PROCESS_SHARED, nil
case SC_THREAD_SAFE_FUNCTIONS:
return _POSIX_THREAD_SAFE_FUNCTIONS, nil
case SC_THREAD_SPORADIC_SERVER:
return _POSIX_THREAD_SPORADIC_SERVER, nil
case SC_TIMERS:
if _POSIX_TIMERS == 0 {
return yesno(sysctl32("p1003_1b.timers")), nil
}
return _POSIX_TIMERS, nil
case SC_TRACE:
return _POSIX_TRACE, nil
case SC_TRACE_EVENT_FILTER:
return _POSIX_TRACE_EVENT_FILTER, nil
case SC_TRACE_EVENT_NAME_MAX:
return _POSIX_TRACE_EVENT_NAME_MAX, nil
case SC_TRACE_INHERIT:
return _POSIX_TRACE_INHERIT, nil
case SC_TRACE_LOG:
return _POSIX_TRACE_LOG, nil
case SC_TRACE_NAME_MAX:
return _POSIX_TRACE_NAME_MAX, nil
case SC_TRACE_SYS_MAX:
return _POSIX_TRACE_SYS_MAX, nil
case SC_TRACE_USER_EVENT_MAX:
return _POSIX_TRACE_USER_EVENT_MAX, nil
case SC_TYPED_MEMORY_OBJECTS:
return _POSIX_TYPED_MEMORY_OBJECTS, nil
case SC_VERSION:
// TODO(tk): darwin libc uses sysctl(CTL_KERN, KERN_POSIX1)
return _POSIX_VERSION, nil
case SC_V6_ILP32_OFF32:
if _V6_ILP32_OFF32 == 0 {
if unix.SizeofInt*_CHAR_BIT == 32 &&
unix.SizeofInt == unix.SizeofLong &&
unix.SizeofLong == unix.SizeofPtr &&
unix.SizeofPtr == sizeofOffT {
return 1, nil
}
return -1, nil
}
return _V6_ILP32_OFF32, nil
case SC_V6_ILP32_OFFBIG:
if _V6_ILP32_OFFBIG == 0 {
if unix.SizeofInt*_CHAR_BIT == 32 &&
unix.SizeofInt == unix.SizeofLong &&
unix.SizeofLong == unix.SizeofPtr &&
sizeofOffT*_CHAR_BIT >= 64 {
return 1, nil
}
return -1, nil
}
return _V6_ILP32_OFFBIG, nil
case SC_V6_LP64_OFF64:
if _V6_LP64_OFF64 == 0 {
if unix.SizeofInt*_CHAR_BIT == 32 &&
unix.SizeofLong*_CHAR_BIT == 64 &&
unix.SizeofLong == unix.SizeofPtr &&
unix.SizeofPtr == sizeofOffT {
return 1, nil
}
return -1, nil
}
return _V6_LP64_OFF64, nil
case SC_V6_LPBIG_OFFBIG:
if _V6_LPBIG_OFFBIG == 0 {
if unix.SizeofInt*_CHAR_BIT >= 32 &&
unix.SizeofLong*_CHAR_BIT >= 64 &&
unix.SizeofPtr*_CHAR_BIT >= 64 &&
sizeofOffT*_CHAR_BIT >= 64 {
return 1, nil
}
return -1, nil
}
return _V6_LPBIG_OFFBIG, nil
case SC_2_CHAR_TERM:
return _POSIX2_CHAR_TERM, nil
case SC_2_PBS,
SC_2_PBS_ACCOUNTING,
SC_2_PBS_CHECKPOINT,
SC_2_PBS_LOCATE,
SC_2_PBS_MESSAGE,
SC_2_PBS_TRACK:
return _POSIX2_PBS, nil
case SC_2_UPE:
return _POSIX2_UPE, nil
case SC_XOPEN_CRYPT:
return _XOPEN_CRYPT, nil
case SC_XOPEN_ENH_I18N:
return _XOPEN_ENH_I18N, nil
case SC_XOPEN_REALTIME:
return _XOPEN_REALTIME, nil
case SC_XOPEN_REALTIME_THREADS:
return _XOPEN_REALTIME_THREADS, nil
case SC_XOPEN_SHM:
return _XOPEN_SHM, nil
case SC_XOPEN_STREAMS:
return -1, nil
case SC_XOPEN_UNIX:
return _XOPEN_UNIX, nil
case SC_XOPEN_VERSION:
return _XOPEN_VERSION, nil
case SC_XOPEN_XCU_VERSION:
return _XOPEN_XCU_VERSION, nil
case SC_PHYS_PAGES:
return sysctl64("hw.memsize") / int64(unix.Getpagesize()), nil
case SC_NPROCESSORS_CONF:
fallthrough
case SC_NPROCESSORS_ONLN:
return sysctl32("hw.ncpu"), nil
}
return sysconfGeneric(name)
}