diff options
Diffstat (limited to 'manual/threads.texi')
| -rw-r--r-- | manual/threads.texi | 36 |
1 files changed, 28 insertions, 8 deletions
diff --git a/manual/threads.texi b/manual/threads.texi index 7cf5be2..e088b26 100644 --- a/manual/threads.texi +++ b/manual/threads.texi @@ -20,9 +20,11 @@ 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*)) +@deftypefun int pthread_key_create (pthread_key_t *@var{key}, void (*@var{destructor})(void*)) +@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}. @@ -30,21 +32,39 @@ 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 -@c FIXME: use @deftypefun for these. -@item int pthread_key_delete (pthread_key_t @var{key}) +@deftypefun int pthread_key_delete (pthread_key_t @var{key}) +@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 -@item void *pthread_getspecific (pthread_key_t @var{key}) +@deftypefun void *pthread_getspecific (pthread_key_t @var{key}) +@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} +@c pthread_getspecific ok Return the thread-specific data associated with @var{key} in the calling thread. +@end deftypefun -@item int pthread_setspecific (pthread_key_t @var{key}, const void *@var{value}) +@deftypefun int pthread_setspecific (pthread_key_t @var{key}, const void *@var{value}) +@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 -@end table @node Non-POSIX Extensions @section Non-POSIX Extensions |