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* manual/time.texi: Document MTASC-safety properties.
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Alexandre Oliva
parent
11087373a6
commit
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@ -1,3 +1,7 @@
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2014-02-01 Alexandre Oliva <aoliva@redhat.com>
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* manual/time.texi: Document MTASC-safety properties.
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2014-02-01 Alexandre Oliva <aoliva@redhat.com>
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* manual/string.texi: Document MTASC-safety properties.
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369
manual/time.texi
369
manual/time.texi
@ -79,6 +79,7 @@ two calendar times. This function is declared in @file{time.h}.
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@comment time.h
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@comment ISO
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@deftypefun double difftime (time_t @var{time1}, time_t @var{time0})
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@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
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The @code{difftime} function returns the number of seconds of elapsed
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time between calendar time @var{time1} and calendar time @var{time0}, as
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a value of type @code{double}. The difference ignores leap seconds
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@ -246,6 +247,12 @@ Values of type @code{clock_t} are numbers of clock ticks.
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@comment time.h
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@comment ISO
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@deftypefun clock_t clock (void)
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@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
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@c On Hurd, this calls task_info twice and adds user and system time
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@c from both basic and thread time info structs. On generic posix,
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@c calls times and adds utime and stime. On bsd, calls getrusage and
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@c safely converts stime and utime to clock. On linux, calls
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@c clock_gettime.
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This function returns the calling process' current CPU time. If the CPU
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time is not available or cannot be represented, @code{clock} returns the
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value @code{(clock_t)(-1)}.
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@ -310,6 +317,12 @@ This is an obsolete name for the number of clock ticks per second. Use
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@comment sys/times.h
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@comment POSIX.1
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@deftypefun clock_t times (struct tms *@var{buffer})
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@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
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@c On HURD, this calls task_info twice, for basic and thread times info,
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@c adding user and system times into tms, and then gettimeofday, to
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@c compute the real time. On BSD, it calls getclktck, getrusage (twice)
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@c and time. On Linux, it's a syscall with special handling to account
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@c for clock_t counts that look like error values.
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The @code{times} function stores the processor time information for
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the calling process in @var{buffer}.
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@ -409,6 +422,7 @@ subtracting. @xref{Elapsed Time}.
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@comment time.h
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@comment ISO
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@deftypefun time_t time (time_t *@var{result})
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@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
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The @code{time} function returns the current calendar time as a value of
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type @code{time_t}. If the argument @var{result} is not a null pointer,
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the calendar time value is also stored in @code{*@var{result}}. If the
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@ -421,6 +435,8 @@ current calendar time is not available, the value
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@comment time.h
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@comment SVID, XPG
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@deftypefun int stime (const time_t *@var{newtime})
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@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
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@c On unix, this is implemented in terms of settimeofday.
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@code{stime} sets the system clock, i.e., it tells the system that the
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current calendar time is @var{newtime}, where @code{newtime} is
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interpreted as described in the above definition of @code{time_t}.
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@ -475,6 +491,12 @@ Instead, use the facilities described in @ref{Time Zone Functions}.
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@comment sys/time.h
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@comment BSD
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@deftypefun int gettimeofday (struct timeval *@var{tp}, struct timezone *@var{tzp})
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@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
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@c On most GNU/Linux systems this is a direct syscall, but the posix/
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@c implementation (not used on GNU/Linux or GNU/Hurd) relies on time and
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@c localtime_r, saving and restoring tzname in an unsafe manner.
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@c On some GNU/Linux variants, ifunc resolvers are used in shared libc
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@c for vdso resolution. ifunc-vdso-revisit.
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The @code{gettimeofday} function returns the current calendar time as
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the elapsed time since the epoch in the @code{struct timeval} structure
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indicated by @var{tp}. (@pxref{Elapsed Time} for a description of
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@ -498,6 +520,9 @@ Instead, use the facilities described in @ref{Time Zone Functions}.
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@comment sys/time.h
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@comment BSD
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@deftypefun int settimeofday (const struct timeval *@var{tp}, const struct timezone *@var{tzp})
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@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
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@c On HURD, it calls host_set_time with a privileged port. On other
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@c unix systems, it's a syscall.
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The @code{settimeofday} function sets the current calendar time in the
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system clock according to the arguments. As for @code{gettimeofday},
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the calendar time is represented as the elapsed time since the epoch.
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@ -539,6 +564,10 @@ The operating system does not support setting time zone information, and
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@comment sys/time.h
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@comment BSD
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@deftypefun int adjtime (const struct timeval *@var{delta}, struct timeval *@var{olddelta})
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@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
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@c On hurd and mach, call host_adjust_time with a privileged port. On
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@c Linux, it's implemented in terms of adjtimex. On other unixen, it's
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@c a syscall.
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This function speeds up or slows down the system clock in order to make
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a gradual adjustment. This ensures that the calendar time reported by
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the system clock is always monotonically increasing, which might not
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@ -577,6 +606,8 @@ Symbols for the following function are declared in @file{sys/timex.h}.
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@comment sys/timex.h
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@comment GNU
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@deftypefun int adjtimex (struct timex *@var{timex})
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@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
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@c It's a syscall, only available on linux.
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@code{adjtimex} is functionally identical to @code{ntp_adjtime}.
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@xref{High Accuracy Clock}.
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@ -674,6 +705,10 @@ GNU extension, and is not visible in a strict @w{ISO C} environment.
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@comment time.h
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@comment ISO
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@deftypefun {struct tm *} localtime (const time_t *@var{time})
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@safety{@prelim{}@mtunsafe{@mtasurace{:tmbuf} @mtsenv{} @mtslocale{}}@asunsafe{@ascuheap{} @asulock{}}@acunsafe{@aculock{} @acsmem{} @acsfd{}}}
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@c Calls tz_convert with a static buffer.
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@c localtime @mtasurace:tmbuf @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
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@c tz_convert dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
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The @code{localtime} function converts the simple time pointed to by
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@var{time} to broken-down time representation, expressed relative to the
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user's specified time zone.
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@ -698,6 +733,87 @@ all threads. POSIX.1c introduced a variant of this function.
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@comment time.h
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@comment POSIX.1c
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@deftypefun {struct tm *} localtime_r (const time_t *@var{time}, struct tm *@var{resultp})
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@safety{@prelim{}@mtsafe{@mtsenv{} @mtslocale{}}@asunsafe{@ascuheap{} @asulock{}}@acunsafe{@aculock{} @acsmem{} @acsfd{}}}
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@c localtime_r @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
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@c tz_convert(use_localtime) @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
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@c libc_lock_lock dup @asulock @aculock
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@c tzset_internal @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
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@c always called with tzset_lock held
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@c sets static is_initialized before initialization;
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@c reads and sets old_tz; sets tz_rules.
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@c some of the issues only apply on the first call.
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@c subsequent calls only trigger these when called by localtime;
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@c otherwise, they're ok.
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@c getenv dup @mtsenv
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@c strcmp dup ok
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@c strdup @ascuheap
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@c tzfile_read @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
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@c memcmp dup ok
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@c strstr dup ok
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@c getenv dup @mtsenv
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@c asprintf dup @mtslocale @ascuheap @acsmem
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@c stat64 dup ok
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@c fopen dup @ascuheap @asulock @acsmem @acsfd @aculock
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@c fileno dup ok
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@c fstat64 dup ok
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@c fclose dup @ascuheap @asulock @aculock @acsmem @acsfd
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@c free dup @ascuheap @acsmem
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@c fsetlocking dup ok [no @mtasurace:stream @asulock, exclusive]
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@c fread_unlocked dup ok [no @mtasurace:stream @asucorrupt @acucorrupt]
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@c memcpy dup ok
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@c decode ok
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@c bswap_32 dup ok
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@c fseek dup ok [no @mtasurace:stream @asucorrupt @acucorrupt]
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@c ftello dup ok [no @mtasurace:stream @asucorrupt @acucorrupt]
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@c malloc dup @ascuheap @acsmem
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@c decode64 ok
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@c bswap_64 dup ok
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@c getc_unlocked ok [no @mtasurace:stream @asucorrupt @acucorrupt]
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@c tzstring dup @ascuheap @acsmem
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@c compute_tzname_max dup ok [guarded by tzset_lock]
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@c memset dup ok
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@c update_vars ok [guarded by tzset_lock]
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@c sets daylight, timezone, tzname and tzname_cur_max;
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@c called only with tzset_lock held, unless tzset_parse_tz
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@c (internal, but not static) gets called by users; given the its
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@c double-underscore-prefixed name, this interface violation could
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@c be regarded as undefined behavior.
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@c strlen ok
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@c tzset_parse_tz @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
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@c sscanf dup @mtslocale @ascuheap @acsmem
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@c isalnum dup @mtsenv
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@c tzstring @ascuheap @acsmem
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@c reads and changes tzstring_list without synchronization, but
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@c only called with tzset_lock held (save for interface violations)
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@c strlen dup ok
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@c malloc dup @ascuheap @acsmem
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@c strcpy dup ok
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@c isdigit dup @mtslocale
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@c compute_offset ok
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@c tzfile_default @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
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@c sets tzname, timezone, types, zone_names, rule_*off, etc; no guards
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@c strlen dup ok
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@c tzfile_read dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
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@c mempcpy dup ok
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@c compute_tzname_max ok [if guarded by tzset_lock]
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@c iterates over zone_names; no guards
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@c free dup @ascuheap @acsmem
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@c strtoul dup @mtslocale
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@c update_vars dup ok
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@c tzfile_compute(use_localtime) @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
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@c sets tzname; no guards. with !use_localtime, as in gmtime, it's ok
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@c tzstring dup @acsuheap @acsmem
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@c tzset_parse_tz dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
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@c offtime dup ok
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@c tz_compute dup ok
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@c strcmp dup ok
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@c offtime ok
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@c isleap dup ok
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@c tz_compute ok
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@c compute_change ok
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@c isleap ok
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@c libc_lock_unlock dup @aculock
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The @code{localtime_r} function works just like the @code{localtime}
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function. It takes a pointer to a variable containing a simple time
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and converts it to the broken-down time format.
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@ -714,6 +830,9 @@ object the result was written into, i.e., it returns @var{resultp}.
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@comment time.h
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@comment ISO
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@deftypefun {struct tm *} gmtime (const time_t *@var{time})
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@safety{@prelim{}@mtunsafe{@mtasurace{:tmbuf} @mtsenv{} @mtslocale{}}@asunsafe{@ascuheap{} @asulock{}}@acunsafe{@aculock{} @acsmem{} @acsfd{}}}
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@c gmtime @mtasurace:tmbuf @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
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@c tz_convert dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
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This function is similar to @code{localtime}, except that the broken-down
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time is expressed as Coordinated Universal Time (UTC) (formerly called
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Greenwich Mean Time (GMT)) rather than relative to a local time zone.
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@ -727,6 +846,15 @@ is placed in a static variable. POSIX.1c also provides a replacement for
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@comment time.h
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@comment POSIX.1c
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@deftypefun {struct tm *} gmtime_r (const time_t *@var{time}, struct tm *@var{resultp})
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@safety{@prelim{}@mtsafe{@mtsenv{} @mtslocale{}}@asunsafe{@ascuheap{} @asulock{}}@acunsafe{@aculock{} @acsmem{} @acsfd{}}}
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@c You'd think tz_convert could avoid some safety issues with
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@c !use_localtime, but no such luck: tzset_internal will always bring
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@c about all possible AS and AC problems when it's first called.
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@c Calling any of localtime,gmtime_r once would run the initialization
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@c and avoid the heap, mem and fd issues in gmtime* in subsequent calls,
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@c but the unsafe locking would remain.
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@c gmtime_r @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
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@c tz_convert(gmtime_r) dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
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This function is similar to @code{localtime_r}, except that it converts
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just like @code{gmtime} the given time as Coordinated Universal Time.
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@ -738,6 +866,29 @@ object the result was written into, i.e., it returns @var{resultp}.
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@comment time.h
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@comment ISO
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@deftypefun time_t mktime (struct tm *@var{brokentime})
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@safety{@prelim{}@mtsafe{@mtsenv{} @mtslocale{}}@asunsafe{@ascuheap{} @asulock{}}@acunsafe{@aculock{} @acsmem{} @acsfd{}}}
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@c mktime @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
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@c passes a static localtime_offset to mktime_internal; it is read
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@c once, used as an initial guess, and updated at the end, but not
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@c used except as a guess for subsequent calls, so it should be safe.
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@c Even though a compiler might delay the load and perform it multiple
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@c times (bug 16346), there are at least two unconditional uses of the
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@c auto variable in which the first load is stored, separated by a
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@c call to an external function, and a conditional change of the
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@c variable before the external call, so refraining from allocating a
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@c local variable at the first load would be a very bad optimization.
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@c tzset dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
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@c mktime_internal(localtime_r) @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
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@c ydhms_diff ok
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@c ranged_convert(localtime_r) @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
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@c *convert = localtime_r dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
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@c time_t_avg dup ok
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@c guess_time_tm dup ok
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@c ydhms_diff dup ok
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@c time_t_add_ok ok
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@c time_t_avg ok
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@c isdst_differ ok
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@c time_t_int_add_ok ok
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The @code{mktime} function converts a broken-down time structure to a
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simple time representation. It also normalizes the contents of the
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broken-down time structure, and fills in some components based on the
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@ -765,6 +916,8 @@ members. @xref{Time Zone Functions}.
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@comment time.h
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@comment ???
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@deftypefun time_t timelocal (struct tm *@var{brokentime})
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@safety{@prelim{}@mtsafe{@mtsenv{} @mtslocale{}}@asunsafe{@ascuheap{} @asulock{}}@acunsafe{@aculock{} @acsmem{} @acsfd{}}}
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@c Alias to mktime.
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@code{timelocal} is functionally identical to @code{mktime}, but more
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mnemonically named. Note that it is the inverse of the @code{localtime}
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@ -778,6 +931,19 @@ available. @code{timelocal} is rather rare.
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@comment time.h
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@comment ???
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@deftypefun time_t timegm (struct tm *@var{brokentime})
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@safety{@prelim{}@mtsafe{@mtsenv{} @mtslocale{}}@asunsafe{@ascuheap{} @asulock{}}@acunsafe{@aculock{} @acsmem{} @acsfd{}}}
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@c timegm @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
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@c gmtime_offset triggers the same caveats as localtime_offset in mktime.
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@c although gmtime_r, as called by mktime, might save some issues,
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@c tzset calls tzset_internal with always, which forces
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@c reinitialization, so all issues may arise.
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@c tzset dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
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@c mktime_internal(gmtime_r) @asulock @aculock
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@c...gmtime_r @asulock @aculock
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@c ... dup ok
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@c tz_convert(!use_localtime) @asulock @aculock
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@c ... dup @asulock @aculock
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@c tzfile_compute(!use_localtime) ok
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@code{timegm} is functionally identical to @code{mktime} except it
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always takes the input values to be Coordinated Universal Time (UTC)
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@ -839,6 +1005,8 @@ system clock from the true calendar time.
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@comment sys/timex.h
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@comment GNU
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@deftypefun int ntp_gettime (struct ntptimeval *@var{tptr})
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@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
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@c Wrapper for adjtimex.
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The @code{ntp_gettime} function sets the structure pointed to by
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@var{tptr} to current values. The elements of the structure afterwards
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contain the values the timer implementation in the kernel assumes. They
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@ -956,6 +1124,8 @@ exceeded the threshold.
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@comment sys/timex.h
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@comment GNU
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@deftypefun int ntp_adjtime (struct timex *@var{tptr})
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@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
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@c Alias to adjtimex syscall.
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The @code{ntp_adjtime} function sets the structure specified by
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@var{tptr} to current values.
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@ -1010,6 +1180,13 @@ strings. These functions are declared in the header file @file{time.h}.
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@comment time.h
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@comment ISO
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@deftypefun {char *} asctime (const struct tm *@var{brokentime})
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@safety{@prelim{}@mtunsafe{@mtasurace{:asctime} @mtslocale{}}@asunsafe{}@acsafe{}}
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@c asctime @mtasurace:asctime @mtslocale
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@c Uses a static buffer.
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@c asctime_internal @mtslocale
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@c snprintf dup @mtslocale [no @acsuheap @acsmem]
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@c ab_day_name @mtslocale
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@c ab_month_name @mtslocale
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The @code{asctime} function converts the broken-down time value that
|
||||
@var{brokentime} points to into a string in a standard format:
|
||||
|
||||
@ -1033,6 +1210,9 @@ string.)
|
||||
@comment time.h
|
||||
@comment POSIX.1c
|
||||
@deftypefun {char *} asctime_r (const struct tm *@var{brokentime}, char *@var{buffer})
|
||||
@safety{@prelim{}@mtsafe{@mtslocale{}}@assafe{}@acsafe{}}
|
||||
@c asctime_r @mtslocale
|
||||
@c asctime_internal dup @mtslocale
|
||||
This function is similar to @code{asctime} but instead of placing the
|
||||
result in a static buffer it writes the string in the buffer pointed to
|
||||
by the parameter @var{buffer}. This buffer should have room
|
||||
@ -1047,6 +1227,10 @@ return @code{NULL}.
|
||||
@comment time.h
|
||||
@comment ISO
|
||||
@deftypefun {char *} ctime (const time_t *@var{time})
|
||||
@safety{@prelim{}@mtunsafe{@mtasurace{:tmbuf} @mtasurace{:asctime} @mtsenv{} @mtslocale{}}@asunsafe{@ascuheap{} @asulock{}}@acunsafe{@aculock{} @acsmem{} @acsfd{}}}
|
||||
@c ctime @mtasurace:tmbuf @mtasurace:asctime @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c localtime dup @mtasurace:tmbuf @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c asctime dup @mtasurace:asctime @mtslocale
|
||||
The @code{ctime} function is similar to @code{asctime}, except that you
|
||||
specify the calendar time argument as a @code{time_t} simple time value
|
||||
rather than in broken-down local time format. It is equivalent to
|
||||
@ -1062,6 +1246,10 @@ Calling @code{ctime} also sets the current time zone as if
|
||||
@comment time.h
|
||||
@comment POSIX.1c
|
||||
@deftypefun {char *} ctime_r (const time_t *@var{time}, char *@var{buffer})
|
||||
@safety{@prelim{}@mtsafe{@mtsenv{} @mtslocale{}}@asunsafe{@ascuheap{} @asulock{}}@acunsafe{@aculock{} @acsmem{} @acsfd{}}}
|
||||
@c ctime_r @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c localtime_r dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c asctime_r dup @mtslocale
|
||||
This function is similar to @code{ctime}, but places the result in the
|
||||
string pointed to by @var{buffer}. It is equivalent to (written using
|
||||
gcc extensions, @pxref{Statement Exprs,,,gcc,Porting and Using gcc}):
|
||||
@ -1079,6 +1267,63 @@ return @code{NULL}.
|
||||
@comment time.h
|
||||
@comment ISO
|
||||
@deftypefun size_t strftime (char *@var{s}, size_t @var{size}, const char *@var{template}, const struct tm *@var{brokentime})
|
||||
@safety{@prelim{}@mtsafe{@mtsenv{} @mtslocale{}}@asunsafe{@asucorrupt{} @ascuheap{} @asulock{} @ascudlopen{}}@acunsafe{@acucorrupt{} @aculock{} @acsmem{} @acsfd{}}}
|
||||
@c strftime @mtsenv @mtslocale @asucorrupt @ascuheap @asulock @ascudlopen @acucorrupt @aculock @acsmem @acsfd
|
||||
@c strftime_l @mtsenv @mtslocale @asucorrupt @ascuheap @asulock @ascudlopen @acucorrupt @aculock @acsmem @acsfd
|
||||
@c strftime_internal @mtsenv @mtslocale @asucorrupt @ascuheap @asulock @ascudlopen @acucorrupt @aculock @acsmem @acsfd
|
||||
@c add ok
|
||||
@c memset_zero dup ok
|
||||
@c memset_space dup ok
|
||||
@c strlen dup ok
|
||||
@c mbrlen @asucorrupt @ascuheap @asulock @ascudlopen @acucorrupt @aculock @acsmem @acsfd [no @mtasurace:mbstate/!ps]
|
||||
@c mbsinit dup ok
|
||||
@c cpy ok
|
||||
@c add dup ok
|
||||
@c memcpy_lowcase ok
|
||||
@c TOLOWER ok
|
||||
@c tolower_l ok
|
||||
@c memcpy_uppcase ok
|
||||
@c TOUPPER ok
|
||||
@c toupper_l ok
|
||||
@c MEMCPY ok
|
||||
@c memcpy dup ok
|
||||
@c ISDIGIT ok
|
||||
@c STRLEN ok
|
||||
@c strlen dup ok
|
||||
@c strftime_internal dup @mtsenv @mtslocale @asucorrupt @ascuheap @asulock @ascudlopen @acucorrupt @aculock @acsmem @acsfd
|
||||
@c TOUPPER dup ok
|
||||
@c nl_get_era_entry @ascuheap @asulock @acsmem @aculock
|
||||
@c nl_init_era_entries @ascuheap @asulock @acsmem @aculock
|
||||
@c libc_rwlock_wrlock dup @asulock @aculock
|
||||
@c malloc dup @ascuheap @acsmem
|
||||
@c memset dup ok
|
||||
@c free dup @ascuheap @acsmem
|
||||
@c realloc dup @ascuheap @acsmem
|
||||
@c memcpy dup ok
|
||||
@c strchr dup ok
|
||||
@c wcschr dup ok
|
||||
@c libc_rwlock_unlock dup @asulock @aculock
|
||||
@c ERA_DATE_CMP ok
|
||||
@c DO_NUMBER ok
|
||||
@c DO_NUMBER_SPACEPAD ok
|
||||
@c nl_get_alt_digit @ascuheap @asulock @acsmem @aculock
|
||||
@c libc_rwlock_wrlock dup @asulock @aculock
|
||||
@c nl_init_alt_digit @ascuheap @acsmem
|
||||
@c malloc dup @ascuheap @acsmem
|
||||
@c memset dup ok
|
||||
@c strchr dup ok
|
||||
@c libc_rwlock_unlock dup @aculock
|
||||
@c memset_space ok
|
||||
@c memset dup ok
|
||||
@c memset_zero ok
|
||||
@c memset dup ok
|
||||
@c mktime dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c iso_week_days ok
|
||||
@c isleap ok
|
||||
@c tzset dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c localtime_r dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c gmtime_r dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c tm_diff ok
|
||||
This function is similar to the @code{sprintf} function (@pxref{Formatted
|
||||
Input}), but the conversion specifications that can appear in the format
|
||||
template @var{template} are specialized for printing components of the date
|
||||
@ -1406,6 +1651,53 @@ For an example of @code{strftime}, see @ref{Time Functions Example}.
|
||||
@comment time.h
|
||||
@comment ISO/Amend1
|
||||
@deftypefun size_t wcsftime (wchar_t *@var{s}, size_t @var{size}, const wchar_t *@var{template}, const struct tm *@var{brokentime})
|
||||
@safety{@prelim{}@mtsafe{@mtsenv{} @mtslocale{}}@asunsafe{@asucorrupt{} @ascuheap{} @asulock{} @ascudlopen{}}@acunsafe{@acucorrupt{} @aculock{} @acsmem{} @acsfd{}}}
|
||||
@c wcsftime @mtsenv @mtslocale @asucorrupt @ascuheap @asulock @ascudlopen @acucorrupt @aculock @acsmem @acsfd
|
||||
@c wcsftime_l @mtsenv @mtslocale @asucorrupt @ascuheap @asulock @ascudlopen @acucorrupt @aculock @acsmem @acsfd
|
||||
@c wcsftime_internal @mtsenv @mtslocale @asucorrupt @ascuheap @asulock @ascudlopen @acucorrupt @aculock @acsmem @acsfd
|
||||
@c add ok
|
||||
@c memset_zero dup ok
|
||||
@c memset_space dup ok
|
||||
@c wcslen dup ok
|
||||
@c cpy ok
|
||||
@c add dup ok
|
||||
@c memcpy_lowcase ok
|
||||
@c TOLOWER ok
|
||||
@c towlower_l dup ok
|
||||
@c memcpy_uppcase ok
|
||||
@c TOUPPER ok
|
||||
@c towupper_l dup ok
|
||||
@c MEMCPY ok
|
||||
@c wmemcpy dup ok
|
||||
@c widen @asucorrupt @ascuheap @asulock @ascudlopen @acucorrupt @aculock @acsmem @acsfd
|
||||
@c memset dup ok
|
||||
@c mbsrtowcs_l @asucorrupt @ascuheap @asulock @ascudlopen @acucorrupt @aculock @acsmem @acsfd [no @mtasurace:mbstate/!ps]
|
||||
@c ISDIGIT ok
|
||||
@c STRLEN ok
|
||||
@c wcslen dup ok
|
||||
@c wcsftime_internal dup @mtsenv @mtslocale @asucorrupt @ascuheap @asulock @ascudlopen @acucorrupt @aculock @acsmem @acsfd
|
||||
@c TOUPPER dup ok
|
||||
@c nl_get_era_entry dup @ascuheap @asulock @acsmem @aculock
|
||||
@c DO_NUMBER ok
|
||||
@c DO_NUMBER_SPACEPAD ok
|
||||
@c nl_get_walt_digit dup @ascuheap @asulock @acsmem @aculock
|
||||
@c libc_rwlock_wrlock dup @asulock @aculock
|
||||
@c nl_init_alt_digit dup @ascuheap @acsmem
|
||||
@c malloc dup @ascuheap @acsmem
|
||||
@c memset dup ok
|
||||
@c wcschr dup ok
|
||||
@c libc_rwlock_unlock dup @aculock
|
||||
@c memset_space ok
|
||||
@c wmemset dup ok
|
||||
@c memset_zero ok
|
||||
@c wmemset dup ok
|
||||
@c mktime dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c iso_week_days ok
|
||||
@c isleap ok
|
||||
@c tzset dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c localtime_r dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c gmtime_r dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c tm_diff ok
|
||||
The @code{wcsftime} function is equivalent to the @code{strftime}
|
||||
function with the difference that it operates on wide character
|
||||
strings. The buffer where the result is stored, pointed to by @var{s},
|
||||
@ -1456,6 +1748,32 @@ which is defined and implemented in terms of calls to @code{strptime}.
|
||||
@comment time.h
|
||||
@comment XPG4
|
||||
@deftypefun {char *} strptime (const char *@var{s}, const char *@var{fmt}, struct tm *@var{tp})
|
||||
@safety{@prelim{}@mtsafe{@mtsenv{} @mtslocale{}}@asunsafe{@ascuheap{} @asulock{}}@acunsafe{@aculock{} @acsmem{} @acsfd{}}}
|
||||
@c strptime @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c strptime_internal @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c memset dup ok
|
||||
@c ISSPACE ok
|
||||
@c isspace_l dup ok
|
||||
@c match_char ok
|
||||
@c match_string ok
|
||||
@c strlen dup ok
|
||||
@c strncasecmp_l dup ok
|
||||
@c strcmp dup ok
|
||||
@c recursive @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c strptime_internal dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c get_number ok
|
||||
@c ISSPACE dup ok
|
||||
@c localtime_r dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c nl_select_era_entry @ascuheap @asulock @acsmem @aculock
|
||||
@c nl_init_era_entries dup @ascuheap @asulock @acsmem @aculock
|
||||
@c get_alt_number dup @ascuheap @asulock @acsmem @aculock
|
||||
@c nl_parse_alt_digit dup @ascuheap @asulock @acsmem @aculock
|
||||
@c libc_rwlock_wrlock dup @asulock @aculock
|
||||
@c nl_init_alt_digit dup @ascuheap @acsmem
|
||||
@c libc_rwlock_unlock dup @aculock
|
||||
@c get_number dup ok
|
||||
@c day_of_the_week ok
|
||||
@c day_of_the_year ok
|
||||
The @code{strptime} function parses the input string @var{s} according
|
||||
to the format string @var{fmt} and stores its results in the
|
||||
structure @var{tp}.
|
||||
@ -1869,6 +2187,9 @@ in a @code{time_t} variable.
|
||||
@comment time.h
|
||||
@comment Unix98
|
||||
@deftypefun {struct tm *} getdate (const char *@var{string})
|
||||
@safety{@prelim{}@mtunsafe{@mtasurace{:getdate} @mtsenv{} @mtslocale{}}@asunsafe{@ascuheap{} @asulock{}}@acunsafe{@aculock{} @acsmem{} @acsfd{}}}
|
||||
@c getdate @mtasurace:getdate @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c getdate_r dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
The interface to @code{getdate} is the simplest possible for a function
|
||||
to parse a string and return the value. @var{string} is the input
|
||||
string and the result is returned in a statically-allocated variable.
|
||||
@ -1980,6 +2301,30 @@ any arbitrary file and chances are high that with some bogus input
|
||||
@comment time.h
|
||||
@comment GNU
|
||||
@deftypefun int getdate_r (const char *@var{string}, struct tm *@var{tp})
|
||||
@safety{@prelim{}@mtsafe{@mtsenv{} @mtslocale{}}@asunsafe{@ascuheap{} @asulock{}}@acunsafe{@aculock{} @acsmem{} @acsfd{}}}
|
||||
@c getdate_r @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c getenv dup @mtsenv
|
||||
@c stat64 dup ok
|
||||
@c access dup ok
|
||||
@c fopen dup @ascuheap @asulock @acsmem @acsfd @aculock
|
||||
@c fsetlocking dup ok [no @mtasurace:stream @asulock, exclusive]
|
||||
@c isspace dup @mtslocale
|
||||
@c strlen dup ok
|
||||
@c malloc dup @ascuheap @acsmem
|
||||
@c fclose dup @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c memcpy dup ok
|
||||
@c getline dup @ascuheap @acsmem [no @asucorrupt @aculock @acucorrupt, exclusive]
|
||||
@c strptime dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c feof_unlocked dup ok
|
||||
@c free dup @ascuheap @acsmem
|
||||
@c ferror_unlocked dup dup ok
|
||||
@c time dup ok
|
||||
@c localtime_r dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c first_wday @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c memset dup ok
|
||||
@c mktime dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c check_mday ok
|
||||
@c mktime dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
The @code{getdate_r} function is the reentrant counterpart of
|
||||
@code{getdate}. It does not use the global variable @code{getdate_err}
|
||||
to signal an error, but instead returns an error code. The same error
|
||||
@ -2215,6 +2560,11 @@ lead to trouble.
|
||||
@comment time.h
|
||||
@comment POSIX.1
|
||||
@deftypefun void tzset (void)
|
||||
@safety{@prelim{}@mtsafe{@mtsenv{} @mtslocale{}}@asunsafe{@ascuheap{} @asulock{}}@acunsafe{@aculock{} @acsmem{} @acsfd{}}}
|
||||
@c tzset @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c libc_lock_lock dup @asulock @aculock
|
||||
@c tzset_internal dup @mtsenv @mtslocale @ascuheap @asulock @aculock @acsmem @acsfd
|
||||
@c libc_lock_unlock dup @aculock
|
||||
The @code{tzset} function initializes the @code{tzname} variable from
|
||||
the value of the @code{TZ} environment variable. It is not usually
|
||||
necessary for your program to call this function, because it is called
|
||||
@ -2353,6 +2703,15 @@ The @code{struct timeval} data type is described in @ref{Elapsed Time}.
|
||||
@comment sys/time.h
|
||||
@comment BSD
|
||||
@deftypefun int setitimer (int @var{which}, const struct itimerval *@var{new}, struct itimerval *@var{old})
|
||||
@safety{@prelim{}@mtsafe{@mtstimer{}}@assafe{}@acsafe{}}
|
||||
@c This function is marked with @mtstimer because the same set of timers
|
||||
@c is shared by all threads of a process, so calling it in one thread
|
||||
@c may interfere with timers set by another thread. This interference
|
||||
@c is not regarded as destructive, because the interface specification
|
||||
@c makes this overriding while returning the previous value the expected
|
||||
@c behavior, and the kernel will serialize concurrent calls so that the
|
||||
@c last one prevails, with each call getting the timer information from
|
||||
@c the timer installed by the previous call in that serialization.
|
||||
The @code{setitimer} function sets the timer specified by @var{which}
|
||||
according to @var{new}. The @var{which} argument can have a value of
|
||||
@code{ITIMER_REAL}, @code{ITIMER_VIRTUAL}, or @code{ITIMER_PROF}.
|
||||
@ -2373,6 +2732,7 @@ The timer period is too large.
|
||||
@comment sys/time.h
|
||||
@comment BSD
|
||||
@deftypefun int getitimer (int @var{which}, struct itimerval *@var{old})
|
||||
@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
|
||||
The @code{getitimer} function stores information about the timer specified
|
||||
by @var{which} in the structure pointed at by @var{old}.
|
||||
|
||||
@ -2405,6 +2765,8 @@ timer.
|
||||
@comment unistd.h
|
||||
@comment POSIX.1
|
||||
@deftypefun {unsigned int} alarm (unsigned int @var{seconds})
|
||||
@safety{@prelim{}@mtsafe{@mtstimer{}}@assafe{}@acsafe{}}
|
||||
@c Wrapper for setitimer.
|
||||
The @code{alarm} function sets the real-time timer to expire in
|
||||
@var{seconds} seconds. If you want to cancel any existing alarm, you
|
||||
can do this by calling @code{alarm} with a @var{seconds} argument of
|
||||
@ -2464,6 +2826,10 @@ any descriptors to wait for.
|
||||
@comment unistd.h
|
||||
@comment POSIX.1
|
||||
@deftypefun {unsigned int} sleep (unsigned int @var{seconds})
|
||||
@safety{@prelim{}@mtunsafe{@mtascusig{:SIGCHLD/linux}}@asunsafe{}@acunsafe{}}
|
||||
@c On Mach, it uses ports and calls time. On generic posix, it calls
|
||||
@c nanosleep. On Linux, it temporarily blocks SIGCHLD, which is MT- and
|
||||
@c AS-Unsafe, and in a way that makes it AC-Unsafe (C-unsafe, even!).
|
||||
The @code{sleep} function waits for @var{seconds} or until a signal
|
||||
is delivered, whichever happens first.
|
||||
|
||||
@ -2508,6 +2874,9 @@ the same program, because @code{sleep} does not work by means of
|
||||
@comment time.h
|
||||
@comment POSIX.1
|
||||
@deftypefun int nanosleep (const struct timespec *@var{requested_time}, struct timespec *@var{remaining})
|
||||
@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
|
||||
@c On Linux, it's a syscall. On Mach, it calls gettimeofday and uses
|
||||
@c ports.
|
||||
If resolution to seconds is not enough the @code{nanosleep} function can
|
||||
be used. As the name suggests the sleep interval can be specified in
|
||||
nanoseconds. The actual elapsed time of the sleep interval might be
|
||||
|
||||
Loading…
Reference in New Issue
Block a user