mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-27 03:41:23 +08:00
45 lines
1.6 KiB
Plaintext
45 lines
1.6 KiB
Plaintext
|
@node POSIX Threads
|
||
|
|
@c @node POSIX Threads, , Cryptographic Functions, Top
|
||
|
|
@chapter POSIX Threads
|
||
|
|
@c %MENU% POSIX Threads
|
||
|
|
@cindex threads
|
||
|
|
|
||
|
|
This chapter describes the @glibcadj{} POSIX Thread implementation.
|
||
|
|
|
||
|
|
@menu
|
||
|
|
* Thread-specific Data:: Support for creating and
|
||
|
|
managing thread-specific data
|
||
|
|
@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:
|
||
|
|
|
||
|
|
@table @code
|
||
|
|
|
||
|
|
@item int pthread_key_create (pthread_key_t *@var{key}, void (*@var{destructor})(void*))
|
||
|
|
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.
|
||
|
|
|
||
|
|
@item int pthread_key_delete (pthread_key_t @var{key})
|
||
|
|
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.
|
||
|
|
|
||
|
|
@item void *pthread_getspecific (pthread_key_t @var{key})
|
||
|
|
Return the thread-specific data associated with @var{key} in the calling
|
||
|
|
thread.
|
||
|
|
|
||
|
|
@item int pthread_setspecific (pthread_key_t @var{key}, const void *@var{value})
|
||
|
|
Associate the thread-specific @var{value} with @var{key} in the calling thread.
|
||
|
|
|
||
|
|
@end table
|