mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-22 10:50:07 +00:00
d08a7e4cbe
The Summary is now generated from @standards, and syntax-checking is performed. If invalid @standards syntax is detected, summary.pl will fail, reporting all errors. Failure and error reporting is disabled for now, however, since much of the manual is still incomplete wrt. header and standards annotations. Note that the sorting order of the Summary has changed; summary.pl respects the locale, like summary.awk did, but the use of LC_ALL=C is introduced in the Makefile. Other notable deviations are improved detection of the annotated elements' names, which are used for sorting, and improved detection of the @node used to reference into the manual. The most noticeable difference in the rendered Summary is that entries may now contain multiple lines, one for each header and standard combination. summary.pl accepts a `--help' option, which details the expected syntax of @standards. If errors are reported, the user is directed to this feature for further information. * manual/Makefile: Generate summary.texi with summary.pl. Force use of the C locale. Update Perl dependency comment. * manual/header.texi: Update reference to summary.awk. * manual/macros.texi: Refer authors to `summary.pl --help'. * manual/summary.awk: Remove file. * manual/summary.pl: New file. Generate summary.texi, and check for @standards-related syntax errors. * manual/argp.texi: Convert header and standards @comments to @standards. * manual/arith.texi: Likewise. * manual/charset.texi: Likewise. * manual/conf.texi: Likewise. * manual/creature.texi: Likewise. * manual/crypt.texi: Likewise. * manual/ctype.texi: Likewise. * manual/debug.texi: Likewise. * manual/errno.texi: Likewise. * manual/filesys.texi: Likewise. * manual/getopt.texi: Likewise. * manual/job.texi: Likewise. * manual/lang.texi: Likewise. * manual/llio.texi: Likewise. * manual/locale.texi: Likewise. * manual/math.texi: Likewise. * manual/memory.texi: Likewise. * manual/message.texi: Likewise. * manual/pattern.texi: Likewise. * manual/pipe.texi: Likewise. * manual/process.texi: Likewise. * manual/resource.texi: Likewise. * manual/search.texi: Likewise. * manual/setjmp.texi: Likewise. * manual/signal.texi: Likewise. * manual/socket.texi: Likewise. * manual/startup.texi: Likewise. * manual/stdio.texi: Likewise. * manual/string.texi: Likewise. * manual/sysinfo.texi: Likewise. * manual/syslog.texi: Likewise. * manual/terminal.texi: Likewise. * manual/threads.texi: Likewise. * manual/time.texi: Likewise. * manual/users.texi: Likewise.
247 lines
7.8 KiB
Plaintext
247 lines
7.8 KiB
Plaintext
@node POSIX Threads
|
|
@c @node POSIX Threads, Internal Probes, Cryptographic Functions, Top
|
|
@chapter POSIX Threads
|
|
@c %MENU% POSIX Threads
|
|
@cindex pthreads
|
|
|
|
This chapter describes the @glibcadj{} POSIX Threads implementation.
|
|
|
|
@menu
|
|
* Thread-specific Data:: Support for creating and
|
|
managing thread-specific data
|
|
* Non-POSIX Extensions:: Additional functions to extend
|
|
POSIX Thread functionality
|
|
@end menu
|
|
|
|
@node Thread-specific Data
|
|
@section Thread-specific Data
|
|
|
|
The @glibcadj{} implements functions to allow users to create and manage
|
|
data specific to a thread. Such data may be destroyed at thread exit,
|
|
if a destructor is provided. The following functions are defined:
|
|
|
|
@deftypefun int pthread_key_create (pthread_key_t *@var{key}, void (*@var{destructor})(void*))
|
|
@standards{POSIX, pthread.h}
|
|
@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
|
|
@c pthread_key_create ok
|
|
@c KEY_UNUSED ok
|
|
@c KEY_USABLE ok
|
|
Create a thread-specific data key for the calling thread, referenced by
|
|
@var{key}.
|
|
|
|
Objects declared with the C++11 @code{thread_local} keyword are destroyed
|
|
before thread-specific data, so they should not be used in thread-specific
|
|
data destructors or even as members of the thread-specific data, since the
|
|
latter is passed as an argument to the destructor function.
|
|
@end deftypefun
|
|
|
|
@deftypefun int pthread_key_delete (pthread_key_t @var{key})
|
|
@standards{POSIX, pthread.h}
|
|
@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
|
|
@c pthread_key_delete ok
|
|
@c This uses atomic compare and exchange to increment the seq number
|
|
@c after testing it's not a KEY_UNUSED seq number.
|
|
@c KEY_UNUSED dup ok
|
|
Destroy the thread-specific data @var{key} in the calling thread. The
|
|
destructor for the thread-specific data is not called during destruction, nor
|
|
is it called during thread exit.
|
|
@end deftypefun
|
|
|
|
@deftypefun void *pthread_getspecific (pthread_key_t @var{key})
|
|
@standards{POSIX, pthread.h}
|
|
@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
|
|
@c pthread_getspecific ok
|
|
Return the thread-specific data associated with @var{key} in the calling
|
|
thread.
|
|
@end deftypefun
|
|
|
|
@deftypefun int pthread_setspecific (pthread_key_t @var{key}, const void *@var{value})
|
|
@standards{POSIX, pthread.h}
|
|
@safety{@prelim{}@mtsafe{}@asunsafe{@asucorrupt{} @ascuheap{}}@acunsafe{@acucorrupt{} @acsmem{}}}
|
|
@c pthread_setspecific @asucorrupt @ascuheap @acucorrupt @acsmem
|
|
@c a level2 block may be allocated by a signal handler after
|
|
@c another call already made a decision to allocate it, thus losing
|
|
@c the allocated value. the seq number is updated before the
|
|
@c value, which might cause an earlier-generation value to seem
|
|
@c current if setspecific is cancelled or interrupted by a signal
|
|
@c KEY_UNUSED ok
|
|
@c calloc dup @ascuheap @acsmem
|
|
Associate the thread-specific @var{value} with @var{key} in the calling thread.
|
|
@end deftypefun
|
|
|
|
|
|
@node Non-POSIX Extensions
|
|
@section Non-POSIX Extensions
|
|
|
|
In addition to implementing the POSIX API for threads, @theglibc{} provides
|
|
additional functions and interfaces to provide functionality not specified in
|
|
the standard.
|
|
|
|
@menu
|
|
* Default Thread Attributes:: Setting default attributes for
|
|
threads in a process.
|
|
@end menu
|
|
|
|
@node Default Thread Attributes
|
|
@subsection Setting Process-wide defaults for thread attributes
|
|
|
|
@Theglibc{} provides non-standard API functions to set and get the default
|
|
attributes used in the creation of threads in a process.
|
|
|
|
@deftypefun int pthread_getattr_default_np (pthread_attr_t *@var{attr})
|
|
@standards{GNU, pthread.h}
|
|
@safety{@prelim{}@mtsafe{}@asunsafe{@asulock{}}@acunsafe{@aculock{}}}
|
|
@c Takes lock around read from default_pthread_attr.
|
|
Get the default attribute values and set @var{attr} to match. This
|
|
function returns @math{0} on success and a non-zero error code on
|
|
failure.
|
|
@end deftypefun
|
|
|
|
@deftypefun int pthread_setattr_default_np (pthread_attr_t *@var{attr})
|
|
@standards{GNU, pthread.h}
|
|
@safety{@prelim{}@mtsafe{}@asunsafe{@ascuheap{} @asulock{}}@acunsafe{@aculock{} @acsmem{}}}
|
|
@c pthread_setattr_default_np @ascuheap @asulock @aculock @acsmem
|
|
@c check_sched_policy_attr ok
|
|
@c check_sched_priority_attr ok
|
|
@c sched_get_priority_min dup ok
|
|
@c sched_get_priority_max dup ok
|
|
@c check_stacksize_attr ok
|
|
@c lll_lock @asulock @aculock
|
|
@c free dup @ascuheap @acsmem
|
|
@c realloc dup @ascuheap @acsmem
|
|
@c memcpy dup ok
|
|
@c lll_unlock @asulock @aculock
|
|
Set the default attribute values to match the values in @var{attr}. The
|
|
function returns @math{0} on success and a non-zero error code on failure.
|
|
The following error codes are defined for this function:
|
|
|
|
@table @code
|
|
@item EINVAL
|
|
At least one of the values in @var{attr} does not qualify as valid for the
|
|
attributes or the stack address is set in the attribute.
|
|
@item ENOMEM
|
|
The system does not have sufficient memory.
|
|
@end table
|
|
@end deftypefun
|
|
|
|
@c FIXME these are undocumented:
|
|
@c pthread_atfork
|
|
@c pthread_attr_destroy
|
|
@c pthread_attr_getaffinity_np
|
|
@c pthread_attr_getdetachstate
|
|
@c pthread_attr_getguardsize
|
|
@c pthread_attr_getinheritsched
|
|
@c pthread_attr_getschedparam
|
|
@c pthread_attr_getschedpolicy
|
|
@c pthread_attr_getscope
|
|
@c pthread_attr_getstack
|
|
@c pthread_attr_getstackaddr
|
|
@c pthread_attr_getstacksize
|
|
@c pthread_attr_init
|
|
@c pthread_attr_setaffinity_np
|
|
@c pthread_attr_setdetachstate
|
|
@c pthread_attr_setguardsize
|
|
@c pthread_attr_setinheritsched
|
|
@c pthread_attr_setschedparam
|
|
@c pthread_attr_setschedpolicy
|
|
@c pthread_attr_setscope
|
|
@c pthread_attr_setstack
|
|
@c pthread_attr_setstackaddr
|
|
@c pthread_attr_setstacksize
|
|
@c pthread_barrierattr_destroy
|
|
@c pthread_barrierattr_getpshared
|
|
@c pthread_barrierattr_init
|
|
@c pthread_barrierattr_setpshared
|
|
@c pthread_barrier_destroy
|
|
@c pthread_barrier_init
|
|
@c pthread_barrier_wait
|
|
@c pthread_cancel
|
|
@c pthread_cleanup_push
|
|
@c pthread_cleanup_pop
|
|
@c pthread_condattr_destroy
|
|
@c pthread_condattr_getclock
|
|
@c pthread_condattr_getpshared
|
|
@c pthread_condattr_init
|
|
@c pthread_condattr_setclock
|
|
@c pthread_condattr_setpshared
|
|
@c pthread_cond_broadcast
|
|
@c pthread_cond_destroy
|
|
@c pthread_cond_init
|
|
@c pthread_cond_signal
|
|
@c pthread_cond_timedwait
|
|
@c pthread_cond_wait
|
|
@c pthread_create
|
|
@c pthread_detach
|
|
@c pthread_equal
|
|
@c pthread_exit
|
|
@c pthread_getaffinity_np
|
|
@c pthread_getattr_np
|
|
@c pthread_getconcurrency
|
|
@c pthread_getcpuclockid
|
|
@c pthread_getname_np
|
|
@c pthread_getschedparam
|
|
@c pthread_join
|
|
@c pthread_kill
|
|
@c pthread_kill_other_threads_np
|
|
@c pthread_mutexattr_destroy
|
|
@c pthread_mutexattr_getkind_np
|
|
@c pthread_mutexattr_getprioceiling
|
|
@c pthread_mutexattr_getprotocol
|
|
@c pthread_mutexattr_getpshared
|
|
@c pthread_mutexattr_getrobust
|
|
@c pthread_mutexattr_getrobust_np
|
|
@c pthread_mutexattr_gettype
|
|
@c pthread_mutexattr_init
|
|
@c pthread_mutexattr_setkind_np
|
|
@c pthread_mutexattr_setprioceiling
|
|
@c pthread_mutexattr_setprotocol
|
|
@c pthread_mutexattr_setpshared
|
|
@c pthread_mutexattr_setrobust
|
|
@c pthread_mutexattr_setrobust_np
|
|
@c pthread_mutexattr_settype
|
|
@c pthread_mutex_consistent
|
|
@c pthread_mutex_consistent_np
|
|
@c pthread_mutex_destroy
|
|
@c pthread_mutex_getprioceiling
|
|
@c pthread_mutex_init
|
|
@c pthread_mutex_lock
|
|
@c pthread_mutex_setprioceiling
|
|
@c pthread_mutex_timedlock
|
|
@c pthread_mutex_trylock
|
|
@c pthread_mutex_unlock
|
|
@c pthread_once
|
|
@c pthread_rwlockattr_destroy
|
|
@c pthread_rwlockattr_getkind_np
|
|
@c pthread_rwlockattr_getpshared
|
|
@c pthread_rwlockattr_init
|
|
@c pthread_rwlockattr_setkind_np
|
|
@c pthread_rwlockattr_setpshared
|
|
@c pthread_rwlock_destroy
|
|
@c pthread_rwlock_init
|
|
@c pthread_rwlock_rdlock
|
|
@c pthread_rwlock_timedrdlock
|
|
@c pthread_rwlock_timedwrlock
|
|
@c pthread_rwlock_tryrdlock
|
|
@c pthread_rwlock_trywrlock
|
|
@c pthread_rwlock_unlock
|
|
@c pthread_rwlock_wrlock
|
|
@c pthread_self
|
|
@c pthread_setaffinity_np
|
|
@c pthread_setcancelstate
|
|
@c pthread_setcanceltype
|
|
@c pthread_setconcurrency
|
|
@c pthread_setname_np
|
|
@c pthread_setschedparam
|
|
@c pthread_setschedprio
|
|
@c pthread_sigmask
|
|
@c pthread_sigqueue
|
|
@c pthread_spin_destroy
|
|
@c pthread_spin_init
|
|
@c pthread_spin_lock
|
|
@c pthread_spin_trylock
|
|
@c pthread_spin_unlock
|
|
@c pthread_testcancel
|
|
@c pthread_timedjoin_np
|
|
@c pthread_tryjoin_np
|
|
@c pthread_yield
|