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239c2bf93e
* libc/misc/unctrl.c: Replace FUNCTION description.
* libc/signal/signal.c: Remove documentation for raise and _raise_r.
* libc/stdio/getdelim.c: Fix spelling errors.
* libc/stdio/getw.c: Put RETURNS on a separate line. Fix punctuation.
* libc/stdio/putw.c: Likewise.
* libc/stdlib/a64l.c: Fix formatting, spelling and punctuation in
documentation.
* libc/stdlib/assert.c: Do not capitalize FUNCTION description.
* libc/stdlib/efgcvt.c: Add spaces to FUNCTION description.
* libc/stdlib/envlock.c: Use em-dash in FUNCTION description.
* libc/stdlib/mlock.c: Likewise.
* libc/stdlib/mstats.c: Likewise.
* libc/time/tzlock.c: Likewise.
* libc/stdlib/rand.c: Use "multi-threaded" and "thread-safe" in NOTES.
* libc/stdlib/rand48.c: Remove extra space in FUNCTION description
and hyphenate "pseudo-random".
* libc/string/bcmp.c: Remove extra blank lines in documentation.
* libc/string/strncat.c: Likewise.
* libc/string/memchr.c: Remove extra ">" character in documentation.
* libc/string/strcspn.c: Use "characters" instead of "chars".
* libc/string/strpbrk.c: Likewise.
* libc/string/strerror_r.c: Capitalize "GNU".
* libc/string/strnlen.c: Likewise.
* libc/string/strtok.c: Fix formatting, spelling and punctuation in
documentation. Use "multi-threaded" and "thread-safe" in NOTES.
* libc/string/wcscat.c: Split PORTABILITY into two paragraphs.
* libc/string/wcschr.c: Likewise.
* libc/string/wcscmp.c: Likewise.
* libc/string/wcscpy.c: Likewise.
* libc/string/wcscspn.c: Likewise.
* libc/string/wcslen.c: Likewise.
* libc/string/wcsncat.c: Likewise.
* libc/string/wcsncmp.c: Likewise.
* libc/string/wcsncpy.c: Likewise.
* libc/string/wcsnlen.c: Likewise.
* libc/string/wcspbrk.c: Likewise.
* libc/string/wcsrchr.c: Likewise.
* libc/string/wcsspn.c: Likewise.
* libc/string/wmemchr.c: Likewise.
* libc/string/wmemcmp.c: Likewise.
* libc/string/wmemcpy.c: Likewise.
* libc/string/wmemset.c: Likewise.
* libc/string/wmemmove.c: Likewise. Also fix FUNCTION description.
* libc/string/wcswidth.c: Formatting and punctuation in documentation.
* libc/string/wcwidth.c: Likewise.
* libm/common/s_modf.c: Remove extra period from documentation.
* libm/math/s_isnan.c: Fix formatting, grammar and punctuation in
documentation.
* libm/mathfp/s_isnan.c: Likewise.
* libm/math/s_ldexp.c: Fix punctuation.
* libm/mathfp/s_ldexp.c: Likewise.
* libm/math/w_log.c: Likewise.
* libm/mathfp/s_logarithm.c: Likewise.
* libm/math/w_j0.c: Add spaces to FUNCTION description.
* libm/mathfp/w_jn.c: Likewise.
57 lines
1.3 KiB
C
57 lines
1.3 KiB
C
/*
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FUNCTION
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<<__tz_lock>>, <<__tz_unlock>>---lock time zone global variables
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INDEX
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__tz_lock
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INDEX
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__tz_unlock
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ANSI_SYNOPSIS
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#include "local.h"
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void __tz_lock (void);
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void __tz_unlock (void);
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TRAD_SYNOPSIS
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void __tz_lock();
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void __tz_unlock();
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DESCRIPTION
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The <<tzset>> facility functions call these functions when they need to
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ensure the values of global variables. The version of these routines
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supplied in the library use the lock API defined in sys/lock.h. If multiple
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threads of execution can call the time functions and give up scheduling in
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the middle, then you you need to define your own versions of these functions
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in order to safely lock the time zone variables during a call. If you do
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not, the results of <<localtime>>, <<mktime>>, <<ctime>>, and <<strftime>>
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are undefined.
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The lock <<__tz_lock>> may not be called recursively; that is,
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a call <<__tz_lock>> will always lock all subsequent <<__tz_lock>> calls
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until the corresponding <<__tz_unlock>> call on the same thread is made.
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*/
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#include <_ansi.h>
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#include "local.h"
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#include <sys/lock.h>
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#ifndef __SINGLE_THREAD__
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__LOCK_INIT(static, __tz_lock_object);
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#endif
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_VOID
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_DEFUN_VOID (__tz_lock)
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{
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#ifndef __SINGLE_THREAD__
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__lock_acquire(__tz_lock_object);
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#endif
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}
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_VOID
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_DEFUN_VOID (__tz_unlock)
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{
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#ifndef __SINGLE_THREAD__
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__lock_release(__tz_lock_object);
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#endif
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}
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