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author | Andy Polyakov <appro@openssl.org> | 2018-07-29 15:21:38 +0200 |
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committer | Andy Polyakov <appro@openssl.org> | 2018-08-07 09:08:35 +0200 |
commit | d1f8b74c584d55a3c7f8f88d997ad69b67076c77 (patch) | |
tree | 8bd593ad88165b1b9b988368f95d58aa384bb2e3 /doc | |
parent | f21b5b64cbbc279ef31389e6ae312690575187da (diff) | |
download | openssl-d1f8b74c584d55a3c7f8f88d997ad69b67076c77.zip openssl-d1f8b74c584d55a3c7f8f88d997ad69b67076c77.tar.gz openssl-d1f8b74c584d55a3c7f8f88d997ad69b67076c77.tar.bz2 |
man3/OPENSSL_LH_COMPFUNC.pod: clarifications and updates.
Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6786)
Diffstat (limited to 'doc')
-rw-r--r-- | doc/man3/OPENSSL_LH_COMPFUNC.pod | 25 |
1 files changed, 9 insertions, 16 deletions
diff --git a/doc/man3/OPENSSL_LH_COMPFUNC.pod b/doc/man3/OPENSSL_LH_COMPFUNC.pod index ec21c79..a312ef7 100644 --- a/doc/man3/OPENSSL_LH_COMPFUNC.pod +++ b/doc/man3/OPENSSL_LH_COMPFUNC.pod @@ -18,7 +18,7 @@ lh_TYPE_doall, lh_TYPE_doall_arg, lh_TYPE_error - dynamic hash table DECLARE_LHASH_OF(TYPE); - LHASH *lh_TYPE_new(); + LHASH *lh_TYPE_new(OPENSSL_LH_HASHFUNC hash, OPENSSL_LH_COMPFUNC compare); void lh_TYPE_free(LHASH_OF(TYPE) *table); TYPE *lh_TYPE_insert(LHASH_OF(TYPE) *table, TYPE *data); @@ -27,7 +27,7 @@ lh_TYPE_doall, lh_TYPE_doall_arg, lh_TYPE_error - dynamic hash table void lh_TYPE_doall(LHASH_OF(TYPE) *table, OPENSSL_LH_DOALL_FUNC func); void lh_TYPE_doall_arg(LHASH_OF(TYPE) *table, OPENSSL_LH_DOALL_FUNCARG func, - TYPE, TYPE *arg); + TYPE *arg); int lh_TYPE_error(LHASH_OF(TYPE) *table); @@ -171,25 +171,18 @@ lh_TYPE_retrieve() returns the hash table entry if it has been found, B<NULL> otherwise. lh_TYPE_error() returns 1 if an error occurred in the last operation, 0 -otherwise. +otherwise. It's meaningful only after non-retrieve operations. lh_TYPE_free(), lh_TYPE_doall() and lh_TYPE_doall_arg() return no values. =head1 NOTE -The various LHASH macros and callback types exist to make it possible -to write type-checked code without resorting to function-prototype -casting - an evil that makes application code much harder to -audit/verify and also opens the window of opportunity for stack -corruption and other hard-to-find bugs. It also, apparently, violates -ANSI-C. - -The LHASH code is not thread safe. All updating operations must be -performed under a write lock. All retrieve operations should be performed -under a read lock, I<unless> accurate usage statistics are desired. -In which case, a write lock should be used for retrieve operations -as well. For output of the usage statistics, using the functions from -L<OPENSSL_LH_stats(3)>, a read lock suffices. +The LHASH code is not thread safe. All updating operations, as well as +lh_TYPE_error call must be performed under a write lock. All retrieve +operations should be performed under a read lock, I<unless> accurate +usage statistics are desired. In which case, a write lock should be used +for retrieve operations as well. For output of the usage statistics, +using the functions from L<OPENSSL_LH_stats(3)>, a read lock suffices. The LHASH code regards table entries as constant data. As such, it internally represents lh_insert()'d items with a "const void *" |