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45 lines
1.6 KiB
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45 lines
1.6 KiB
Plaintext
@node POSIX Threads
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@c @node POSIX Threads, , Cryptographic Functions, Top
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@chapter POSIX Threads
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@c %MENU% POSIX Threads
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@cindex pthreads
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This chapter describes the @glibcadj{} POSIX Thread implementation.
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@menu
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* Thread-specific Data:: Support for creating and
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managing thread-specific data
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@end menu
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@node Thread-specific Data
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@section Thread-specific Data
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The @glibcadj{} implements functions to allow users to create and manage
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data specific to a thread. Such data may be destroyed at thread exit,
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if a destructor is provided. The following functions are defined:
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@table @code
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@item int pthread_key_create (pthread_key_t *@var{key}, void (*@var{destructor})(void*))
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Create a thread-specific data key for the calling thread, referenced by
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@var{key}.
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Objects declared with the C++11 @code{thread_local} keyword are destroyed
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before thread-specific data, so they should not be used in thread-specific
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data destructors or even as members of the thread-specific data, since the
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latter is passed as an argument to the destructor function.
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@item int pthread_key_delete (pthread_key_t @var{key})
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Destroy the thread-specific data @var{key} in the calling thread. The
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destructor for the thread-specific data is not called during destruction, nor
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is it called during thread exit.
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@item void *pthread_getspecific (pthread_key_t @var{key})
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Return the thread-specific data associated with @var{key} in the calling
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thread.
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@item int pthread_setspecific (pthread_key_t @var{key}, const void *@var{value})
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Associate the thread-specific @var{value} with @var{key} in the calling thread.
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@end table
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