Merged revisions 164416 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

........
r164416 | mmichelson | 2008-12-15 13:45:07 -0600 (Mon, 15 Dec 2008) | 4 lines

Add notes to autoservice and pbx doxygen regarding a potential
deadlock scenario so that it is avoided in the future


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git-svn-id: http://svn.digium.com/svn/asterisk/trunk@164419 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 20 insertions, 0 deletions

diff --git a/include/asterisk/pbx.h b/include/asterisk/pbx.h
index 2bb95930f..a2f1222c4 100644
--- a/include/asterisk/pbx.h
+++ b/include/asterisk/pbx.h
@@ -381,6 +381,10 @@ int ast_get_hint(char *hint, int maxlen, char *name, int maxnamelen,
  * \param priority priority of the action within the extension
  * \param callerid callerid to search for
  *
+ * \note It is possible for autoservice to be started and stopped on c during this
+ * function call, it is important that c is not locked prior to calling this. Otherwise
+ * a deadlock may occur
+ *
  * \return If an extension within the given context(or callerid) with the given priority 
  *         is found a non zero value will be returned. Otherwise, 0 is returned.
  */
@@ -396,6 +400,10 @@ int ast_exists_extension(struct ast_channel *c, const char *context, const char
  * \param label label of the action within the extension to match to priority
  * \param callerid callerid to search for
  *
+ * \note It is possible for autoservice to be started and stopped on c during this
+ * function call, it is important that c is not locked prior to calling this. Otherwise
+ * a deadlock may occur
+ *
  * \retval the priority which matches the given label in the extension
  * \retval -1 if not found.
  */
@@ -405,6 +413,10 @@ int ast_findlabel_extension(struct ast_channel *c, const char *context,
 /*!
  * \brief Find the priority of an extension that has the specified label
  *
+ * \note It is possible for autoservice to be started and stopped on c during this
+ * function call, it is important that c is not locked prior to calling this. Otherwise
+ * a deadlock may occur
+ *
  * \note This function is the same as ast_findlabel_extension, except that it accepts
  * a pointer to an ast_context structure to specify the context instead of the
  * name of the context. Otherwise, the functions behave the same.
@@ -421,6 +433,10 @@ int ast_findlabel_extension2(struct ast_channel *c, struct ast_context *con,
  * \param priority priority of extension path
  * \param callerid callerid of extension being searched for
  *
+ * \note It is possible for autoservice to be started and stopped on c during this
+ * function call, it is important that c is not locked prior to calling this. Otherwise
+ * a deadlock may occur
+ *
  * \return If "exten" *could be* a valid extension in this context with or without
  * some more digits, return non-zero.  Basically, when this returns 0, no matter
  * what you add to exten, it's not going to be a valid extension anymore
@@ -437,6 +453,10 @@ int ast_canmatch_extension(struct ast_channel *c, const char *context,
  * \param priority priority of extension path
  * \param callerid callerid of extension being searched for
  *
+ * \note It is possible for autoservice to be started and stopped on c during this
+ * function call, it is important that c is not locked prior to calling this. Otherwise
+ * a deadlock may occur
+ *
  * \return If "exten" *could match* a valid extension in this context with
  * some more digits, return non-zero.  Does NOT return non-zero if this is
  * an exact-match only.  Basically, when this returns 0, no matter