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Update multi-thread FAQ

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Reviewed-by: Matt Caswell <matt@openssl.org>
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Rich Salz 2015-05-04 11:54:26 -04:00 committed by Rich Salz
parent ff660b9312
commit a28ef860be
1 changed files with 8 additions and 11 deletions
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19
FAQ
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@ -789,18 +789,15 @@ considered to be security issues.
* Is OpenSSL thread-safe? * Is OpenSSL thread-safe?
Yes (with limitations: an SSL connection may not concurrently be used Provided an application sets up the thread callback functions, the
by multiple threads). On Windows and many Unix systems, OpenSSL answer is yes. There are limitations; for example, an SSL connection
automatically uses the multi-threaded versions of the standard cannot be used concurrently by multiple threads. This is true for
libraries. If your platform is not one of these, consult the INSTALL most OpenSSL objects.
file.
Multi-threaded applications must provide two callback functions to To do this, your application must call CRYPTO_set_locking_callback()
OpenSSL by calling CRYPTO_set_locking_callback() and and one of the CRYPTO_THREADID_set...() API's. See the OpenSSL threads
CRYPTO_set_id_callback(), for all versions of OpenSSL up to and manpage for details and "note on multi-threading" in the INSTALL file in
including 0.9.8[abc...]. As of version 1.0.0, CRYPTO_set_id_callback() the source distribution.
and associated APIs are deprecated by CRYPTO_THREADID_set_callback()
and friends. This is described in the threads(3) manpage.
* I've compiled a program under Windows and it crashes: why? * I've compiled a program under Windows and it crashes: why?