diff options
Diffstat (limited to 'doc/crypto/threads.pod')
| -rw-r--r-- | doc/crypto/threads.pod | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/doc/crypto/threads.pod b/doc/crypto/threads.pod index 230cbe890b..76bd10c500 100644 --- a/doc/crypto/threads.pod +++ b/doc/crypto/threads.pod @@ -76,9 +76,7 @@ below). idptr_function(void) is a function that similarly returns a thread ID, but of type void *. This is not needed on platforms where &errno is -different for each thread. OpenSSL assumes that it is in the same -thread iff both the numerical and the pointer thread ID agree, so it -suffices to define one of these two callback functions appropriately. +different for each thread. Additionally, OpenSSL supports dynamic locks, and sometimes, some parts of OpenSSL need it for better performance. To enable this, the following @@ -166,7 +164,9 @@ There is still the issue of platforms where pthread_self() returns something other than an integer. It is for cases like this that CRYPTO_set_idptr_callback() comes in handy. (E.g., call malloc(1) once in each thread, and have idptr_function() return a pointer to -this object.) +this object.) Note that if neither id_function() or idptr_function() +are provided, OpenSSL will use (&errno) as a fallback (as this +usually returns a unique address for each thread). =head1 EXAMPLES |