Port memory-full checking to GnuTLS 3.3

Instead of using gnutls_global_set_mem_functions, check every call
to a GnuTLS function that might return an indication of memory
exhaustion.  Suggested by Dmitry Antipov in:
http://lists.gnu.org/archive/html/emacs-devel/2014-12/msg02056.html
* src/gnutls.c (gnutls_global_set_mem_functions) [WINDOWSNT]: Remove.
(init_gnutls_functions): Do not load gnutls_global_set_mem_functions.
(fn_gnutls_global_set_mem_functions) [!WINDOWSNT]: Remove.
All uses removed.
(check_memory_full): New function.
(emacs_gnutls_handshake, emacs_gnutls_handle_error)
(gnutls_make_error, Fgnutls_boot): Use it.
(emacs_gnutls_global_init): Avoid gnutls_global_set_mem_functions.

1 files changed, 16 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 2df83082fbd..3ea60571a15 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,19 @@
+2014-12-28  Paul Eggert  <eggert@Penguin.CS.UCLA.EDU>
+
+        Port memory-full checking to GnuTLS 3.3
+        Instead of using gnutls_global_set_mem_functions, check every call
+        to a GnuTLS function that might return an indication of memory
+        exhaustion.  Suggested by Dmitry Antipov in:
+        http://lists.gnu.org/archive/html/emacs-devel/2014-12/msg02056.html
+        * gnutls.c (gnutls_global_set_mem_functions) [WINDOWSNT]: Remove.
+        (init_gnutls_functions): Do not load gnutls_global_set_mem_functions.
+        (fn_gnutls_global_set_mem_functions) [!WINDOWSNT]: Remove.
+        All uses removed.
+        (check_memory_full): New function.
+        (emacs_gnutls_handshake, emacs_gnutls_handle_error)
+        (gnutls_make_error, Fgnutls_boot): Use it.
+        (emacs_gnutls_global_init): Avoid gnutls_global_set_mem_functions.
+
 2014-12-25  Eli Zaretskii  <eliz@gnu.org>
 
         * xdisp.c (set_iterator_to_next) <GET_FROM_STRING>: Limit search in