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Address JSON thread safety issues.

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In tracking down some unit tests failures, I ended up reading the fine
print[1] regarding Jansson's thread safety.

In short:
 1. Ref-counting is non-atomic.
 2. json_dumps() and friends are not thread safe.

This patch adds locking where necessary to our ast_json_* wrapper API,
with documentation in json.h describing the thread safety limitations of
the API.

 [1]: http://www.digip.org/jansson/doc/2.4/portability.html#thread-safety

Review: https://reviewboard.asterisk.org/r/2716/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@396119 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
David M. Lee
2013-08-02 14:27:35 +00:00
parent 328e99f41d
commit 10c91bc96e
6 changed files with 238 additions and 19 deletions
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2
res/ari/ari_websockets.c
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@@ -142,7 +142,7 @@ struct ast_json *ast_ari_websocket_session_read(
int ast_ari_websocket_session_write(struct ast_ari_websocket_session *session,
struct ast_json *message)
{
RAII_VAR(char *, str, NULL, ast_free);
RAII_VAR(char *, str, NULL, ast_json_free);
#ifdef AST_DEVMODE
if (!session->validator(message)) {