mirror of
git://sourceware.org/git/glibc.git
synced 2025-03-06 20:58:33 +01:00
a3a5634d9b
This commit moves the `sem_*' family of functions from the IPC chapter, replacing them with a reference to their new location in the Threads chapter. `sem_clockwait' is also moved out of the Non-POSIX Extensions subsection since it is now included in the standard since Issue 8: https://pubs.opengroup.org/onlinepubs/9799919799/functions/sem_clockwait.html Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
51 lines
1.7 KiB
Text
51 lines
1.7 KiB
Text
@node Inter-Process Communication, Job Control, Processes, Top
|
|
@c %MENU% All about inter-process communication
|
|
@chapter Inter-Process Communication
|
|
@cindex ipc
|
|
|
|
This chapter describes the @glibcadj{} inter-process communication primitives.
|
|
|
|
@menu
|
|
* Semaphores:: Support for creating and managing semaphores
|
|
@end menu
|
|
|
|
@node Semaphores
|
|
@section Semaphores
|
|
|
|
@Theglibc{} implements the semaphore APIs as defined in POSIX and
|
|
System V. Semaphores can be used by multiple processes to coordinate shared
|
|
resources. The following is a complete list of the semaphore functions provided
|
|
by @theglibc{}.
|
|
|
|
@c Need descriptions for all of these functions.
|
|
|
|
@subsection System V Semaphores
|
|
@deftypefun int semctl (int @var{semid}, int @var{semnum}, int @var{cmd})
|
|
@safety{@prelim{}@mtsafe{}@assafe{}@acunsafe{@acucorrupt{/linux}}}
|
|
@c syscall(ipc) ok
|
|
@c
|
|
@c AC-unsafe because we need to translate the new kernel
|
|
@c semid_ds buf into the userspace layout. Cancellation
|
|
@c at that point results in an inconsistent userspace
|
|
@c semid_ds.
|
|
@end deftypefun
|
|
|
|
@deftypefun int semget (key_t @var{key}, int @var{nsems}, int @var{semflg})
|
|
@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
|
|
@c syscall(ipc) ok
|
|
@end deftypefun
|
|
|
|
@deftypefun int semop (int @var{semid}, struct sembuf *@var{sops}, size_t @var{nsops})
|
|
@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
|
|
@c syscall(ipc) ok
|
|
@end deftypefun
|
|
|
|
@deftypefun int semtimedop (int @var{semid}, struct sembuf *@var{sops}, size_t @var{nsops}, const struct timespec *@var{timeout})
|
|
@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
|
|
@c syscall(ipc) ok
|
|
@end deftypefun
|
|
|
|
@subsection POSIX Semaphores
|
|
@Theglibc{} provides POSIX semaphores as well. These functions' names begin
|
|
with @code{sem_} and they are declared in @file{semaphore.h}. @xref{POSIX
|
|
Semaphores}.
|