From b6aef57619a75a1df65861270a63eb1515deb8ba Mon Sep 17 00:00:00 2001
From: Mark Michelson <mmichelson@digium.com>
Date: Tue, 13 May 2008 23:54:01 +0000
Subject: [PATCH] Merged revisions 116088 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.4
........
r116088 | mmichelson | 2008-05-13 18:47:49 -0500 (Tue, 13 May 2008) | 12 lines
A change to the way channel locks are handled when DEBUG_CHANNEL_LOCKS is defined.
After debugging a deadlock, it was noticed that when DEBUG_CHANNEL_LOCKS
is enabled in menuselect, the actual origin of channel locks is obscured
by the fact that all channel locks appear to happen in the function
ast_channel_lock(). This code change redefines ast_channel_lock to be a
macro which maps to __ast_channel_lock(), which then relays the proper
file name, line number, and function name information to the core lock
functions so that this information will be displayed in the case that
there is some sort of locking error or core show locks is issued.
........
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@116089 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
include/asterisk/lock.h | 9 ++++++---
main/channel.c | 20 +++++++++++++++-----
2 files changed, 21 insertions(+), 8 deletions(-)
diff --git a/include/asterisk/lock.h b/include/asterisk/lock.h
index f352a2d7dc..cbc2926b36 100644
--- a/include/asterisk/lock.h
+++ b/include/asterisk/lock.h
@@ -1217,18 +1217,21 @@ AST_INLINE_API(int ast_atomic_dec_and_test(volatile int *p),
#define ast_channel_trylock(x) ast_mutex_trylock(&x->lock_dont_use)
#else
+#define ast_channel_lock(a) __ast_channel_lock(a, __FILE__, __LINE__, __PRETTY_FUNCTION__)
/*! \brief Lock AST channel (and print debugging output)
\note You need to enable DEBUG_CHANNEL_LOCKS for this function */
-int ast_channel_lock(struct ast_channel *chan);
+int __ast_channel_lock(struct ast_channel *chan, const char *file, int lineno, const char *func);
+#define ast_channel_unlock(a) __ast_channel_unlock(a, __FILE__, __LINE__, __PRETTY_FUNCTION__)
/*! \brief Unlock AST channel (and print debugging output)
\note You need to enable DEBUG_CHANNEL_LOCKS for this function
*/
-int ast_channel_unlock(struct ast_channel *chan);
+int __ast_channel_unlock(struct ast_channel *chan, const char *file, int lineno, const char *func);
+#define ast_channel_trylock(a) __ast_channel_trylock(a, __FILE__, __LINE__, __PRETTY_FUNCTION__)
/*! \brief Lock AST channel (and print debugging output)
\note You need to enable DEBUG_CHANNEL_LOCKS for this function */
-int ast_channel_trylock(struct ast_channel *chan);
+int __ast_channel_trylock(struct ast_channel *chan, const char *file, int lineno, const char *func);
#endif
#endif /* _ASTERISK_LOCK_H */
diff --git a/main/channel.c b/main/channel.c
index 2cb2bc3365..099924470a 100644
--- a/main/channel.c
+++ b/main/channel.c
@@ -4957,7 +4957,7 @@ const char *channelreloadreason2txt(enum channelreloadreason reason)
/*! \brief Unlock AST channel (and print debugging output)
\note You need to enable DEBUG_CHANNEL_LOCKS for this function
*/
-int ast_channel_unlock(struct ast_channel *chan)
+int __ast_channel_unlock(struct ast_channel *chan, const char *filename, int lineno, const char *func)
{
int res = 0;
ast_debug(3, "::::==== Unlocking AST channel %s\n", chan->name);
@@ -4966,8 +4966,11 @@ int ast_channel_unlock(struct ast_channel *chan)
ast_debug(1, "::::==== Unlocking non-existing channel \n");
return 0;
}
-
+#ifdef DEBUG_THREADS
+ res = __ast_pthread_mutex_unlock(filename, lineno, func, "(channel lock)", &chan->lock_dont_use);
+#else
res = ast_mutex_unlock(&chan->lock_dont_use);
+#endif
if (option_debug > 2) {
#ifdef DEBUG_THREADS
@@ -4991,13 +4994,17 @@ int ast_channel_unlock(struct ast_channel *chan)
/*! \brief Lock AST channel (and print debugging output)
\note You need to enable DEBUG_CHANNEL_LOCKS for this function */
-int ast_channel_lock(struct ast_channel *chan)
+int __ast_channel_lock(struct ast_channel *chan, const char *filename, int lineno, const char *func)
{
int res;
ast_debug(4, "====:::: Locking AST channel %s\n", chan->name);
+#ifdef DEBUG_THREADS
+ res = __ast_pthread_mutex_lock(filename, lineno, func, "(channel lock)", &chan->lock_dont_use);
+#else
res = ast_mutex_lock(&chan->lock_dont_use);
+#endif
if (option_debug > 3) {
#ifdef DEBUG_THREADS
@@ -5020,13 +5027,16 @@ int ast_channel_lock(struct ast_channel *chan)
/*! \brief Lock AST channel (and print debugging output)
\note You need to enable DEBUG_CHANNEL_LOCKS for this function */
-int ast_channel_trylock(struct ast_channel *chan)
+int __ast_channel_trylock(struct ast_channel *chan, const char *filename, int lineno, const char *func)
{
int res;
ast_debug(3, "====:::: Trying to lock AST channel %s\n", chan->name);
-
+#ifdef DEBUG_THREADS
+ res = __ast_pthread_mutex_trylock(filename, lineno, func, "(channel lock)", &chan->lock_dont_use);
+#else
res = ast_mutex_trylock(&chan->lock_dont_use);
+#endif
if (option_debug > 2) {
#ifdef DEBUG_THREADS
--
GitLab