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fix locking and add lock debugging as a define 

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@3870 d0543943-73ff-0310-b7d9-9358b9ac24b2
This commit is contained in:
Anthony Minessale 2006-12-29 16:39:56 +00:00
parent 3b998f7c91
commit c4717f9077
3 changed files with 113 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

47
src/include/switch_core.h
View File

@ -230,24 +230,60 @@ SWITCH_DECLARE(switch_status_t) switch_core_destroy(int vg);
///\defgroup rwl Read/Write Locking
///\ingroup core1
///\{
#ifdef SWITCH_DEBUG_RWLOCKS
SWITCH_DECLARE(switch_status_t) switch_core_session_perform_read_lock(switch_core_session_t *session,
const char *file,
const char *func,
int line);
#endif
/*!
\brief Acquire a read lock on the session
\param session the session to acquire from
\return success if it is safe to read from the session
*/
#ifdef SWITCH_DEBUG_RWLOCKS
#define switch_core_session_read_lock(session) switch_core_session_perform_read_lock(session, __FILE__, __SWITCH_FUNC__, __LINE__)
#else
SWITCH_DECLARE(switch_status_t) switch_core_session_read_lock(switch_core_session_t *session);
#endif
#ifdef SWITCH_DEBUG_RWLOCKS
SWITCH_DECLARE(void) switch_core_session_perform_write_lock(switch_core_session_t *session,
const char *file,
const char *func,
int line);
#endif
/*!
\brief Acquire a write lock on the session
\param session the session to acquire from
*/
#ifdef SWITCH_DEBUG_RWLOCKS
#define switch_core_session_write_lock(session) switch_core_session_perform_write_lock(session, __FILE__, __SWITCH_FUNC__, __LINE__)
#else
SWITCH_DECLARE(void) switch_core_session_write_lock(switch_core_session_t *session);
#endif
#ifdef SWITCH_DEBUG_RWLOCKS
SWITCH_DECLARE(void) switch_core_session_perform_rwunlock(switch_core_session_t *session,
const char *file,
const char *func,
int line);
#endif
/*!
\brief Unlock a read or write lock on as given session
\param session the session
*/
#ifdef SWITCH_DEBUG_RWLOCKS
#define switch_core_session_rwunlock(session) switch_core_session_perform_rwunlock(session, __FILE__, __SWITCH_FUNC__, __LINE__)
#else
SWITCH_DECLARE(void) switch_core_session_rwunlock(switch_core_session_t *session);
#endif
///\}
///\defgroup sh State Handlers
@ -410,13 +446,24 @@ SWITCH_DECLARE(void) switch_core_session_signal_state_change(switch_core_session
*/
SWITCH_DECLARE(char *) switch_core_session_get_uuid(switch_core_session_t *session);
#ifdef SWITCH_DEBUG_RWLOCKS
SWITCH_DECLARE(switch_core_session_t *) switch_core_session_perform_locate(char *uuid_str,
const char *file,
const char *func,
int line);
#endif
/*!
\brief Locate a session based on it's uuiid
\param uuid_str the unique id of the session you want to find
\return the session or NULL
\note if the session was located it will have a read lock obtained which will need to be released with switch_core_session_rwunlock()
*/
#ifdef SWITCH_DEBUG_RWLOCKS
#define switch_core_session_locate(uuid_str) switch_core_session_perform_locate(uuid_str, __FILE__, __SWITCH_FUNC__, __LINE__)
#else
SWITCH_DECLARE(switch_core_session_t *) switch_core_session_locate(char *uuid_str);
#endif
/*!
\brief Retrieve a global variable from the core

2
src/mod/endpoints/mod_sofia/mod_sofia.c
View File

@ -2613,7 +2613,7 @@ static void sip_i_state(int status,
switch_channel_set_variable(channel, "endpoint_disposition", "EARLY MEDIA");
switch_set_flag_locked(tech_pvt, TFLAG_EARLY_MEDIA);
switch_channel_set_flag(channel, CF_EARLY_MEDIA);
return;
goto done;
}
switch_channel_set_variable(channel, "endpoint_disposition", "NO CODECS");
nua_respond(nh, SIP_488_NOT_ACCEPTABLE,

75
src/switch_core.c
View File

@ -543,31 +543,66 @@ SWITCH_DECLARE(const switch_state_handler_table_t *) switch_core_get_state_handl
return runtime.state_handlers[index];
}
#ifdef SWITCH_DEBUG_RWLOCKS
SWITCH_DECLARE(switch_status_t) switch_core_session_perform_read_lock(switch_core_session_t *session,
const char *file,
const char *func,
int line)
#else
SWITCH_DECLARE(switch_status_t) switch_core_session_read_lock(switch_core_session_t *session)
#endif
{
switch_status_t status = SWITCH_STATUS_FALSE;
if (session->rwlock) {
if (switch_test_flag(session, SSF_DESTROYED)) {
status = SWITCH_STATUS_FALSE;
#ifdef SWITCH_DEBUG_RWLOCKS
switch_log_printf(SWITCH_CHANNEL_ID_LOG, (char *) file, func, line, SWITCH_LOG_DEBUG, "%s Read lock FAIL\n",
switch_channel_get_name(session->channel));
#endif
} else {
status = (switch_status_t) switch_thread_rwlock_tryrdlock(session->rwlock);
#ifdef SWITCH_DEBUG_RWLOCKS
switch_log_printf(SWITCH_CHANNEL_ID_LOG, (char *) file, func, line, SWITCH_LOG_DEBUG, "%s Read lock AQUIRED\n",
switch_channel_get_name(session->channel));
#endif
}
}
return status;
}
#ifdef SWITCH_DEBUG_RWLOCKS
SWITCH_DECLARE(void) switch_core_session_perform_write_lock(switch_core_session_t *session,
const char *file,
const char *func,
int line)
{
switch_log_printf(SWITCH_CHANNEL_ID_LOG, (char *) file, func, line, SWITCH_LOG_DEBUG, "%s Write lock AQUIRED\n",
switch_channel_get_name(session->channel));
#else
SWITCH_DECLARE(void) switch_core_session_write_lock(switch_core_session_t *session)
{
#endif
switch_thread_rwlock_wrlock(session->rwlock);
}
#ifdef SWITCH_DEBUG_RWLOCKS
SWITCH_DECLARE(void) switch_core_session_perform_rwunlock(switch_core_session_t *session,
const char *file,
const char *func,
int line)
{
switch_log_printf(SWITCH_CHANNEL_ID_LOG, (char *) file, func, line, SWITCH_LOG_DEBUG, "%s Read/Write lock CLEARED\n",
switch_channel_get_name(session->channel));
#else
SWITCH_DECLARE(void) switch_core_session_rwunlock(switch_core_session_t *session)
{
#endif
switch_thread_rwlock_unlock(session->rwlock);
}
SWITCH_DECLARE(char *) switch_core_get_variable(char *varname)
@ -575,7 +610,15 @@ SWITCH_DECLARE(char *) switch_core_get_variable(char *varname)
return (char *) switch_core_hash_find(runtime.global_vars, varname);
}
#ifdef SWITCH_DEBUG_RWLOCKS
SWITCH_DECLARE(switch_core_session_t *) switch_core_session_perform_locate(char *uuid_str,
const char *file,
const char *func,
int line)
#else
SWITCH_DECLARE(switch_core_session_t *) switch_core_session_locate(char *uuid_str)
#endif
{
switch_core_session_t *session = NULL;
@ -583,7 +626,11 @@ SWITCH_DECLARE(switch_core_session_t *) switch_core_session_locate(char *uuid_st
switch_mutex_lock(runtime.session_table_mutex);
if ((session = switch_core_hash_find(runtime.session_table, uuid_str))) {
/* Acquire a read lock on the session */
if (switch_test_flag(session, SSF_DESTROYED) || switch_thread_rwlock_tryrdlock(session->rwlock) != SWITCH_STATUS_SUCCESS) {
#ifdef SWITCH_DEBUG_RWLOCKS
if (switch_core_session_perform_read_lock(session, file, func, line) != SWITCH_STATUS_SUCCESS) {
#else
if (switch_core_session_read_lock(session) != SWITCH_STATUS_SUCCESS) {
#endif
/* not available, forget it */
session = NULL;
}
@ -601,6 +648,7 @@ SWITCH_DECLARE(void) switch_core_session_hupall(switch_call_cause_t cause)
void *val;
switch_core_session_t *session;
switch_channel_t *channel;
uint32_t loops = 0;
switch_mutex_lock(runtime.session_table_mutex);
for (hi = switch_hash_first(runtime.memory_pool, runtime.session_table); hi; hi = switch_hash_next(hi)) {
@ -614,7 +662,12 @@ SWITCH_DECLARE(void) switch_core_session_hupall(switch_call_cause_t cause)
switch_mutex_unlock(runtime.session_table_mutex);
while(runtime.session_count > 0) {
switch_yield(10000);
switch_yield(100000);
if (++loops == 100) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Giving up with %d session%s remaining\n",
runtime.session_count, runtime.session_count == 1 ? "" : "s");
break;
}
}
}
@ -626,11 +679,11 @@ SWITCH_DECLARE(switch_status_t) switch_core_session_message_send(char *uuid_str,
switch_mutex_lock(runtime.session_table_mutex);
if ((session = switch_core_hash_find(runtime.session_table, uuid_str)) != 0) {
/* Acquire a read lock on the session or forget it the channel is dead */
if (switch_thread_rwlock_tryrdlock(session->rwlock) == SWITCH_STATUS_SUCCESS) {
if (switch_core_session_read_lock(session) == SWITCH_STATUS_SUCCESS) {
if (switch_channel_get_state(session->channel) < CS_HANGUP) {
status = switch_core_session_receive_message(session, message);
}
switch_thread_rwlock_unlock(session->rwlock);
switch_core_session_rwunlock(session);
}
}
switch_mutex_unlock(runtime.session_table_mutex);
@ -646,11 +699,11 @@ SWITCH_DECLARE(switch_status_t) switch_core_session_event_send(char *uuid_str, s
switch_mutex_lock(runtime.session_table_mutex);
if ((session = switch_core_hash_find(runtime.session_table, uuid_str)) != 0) {
/* Acquire a read lock on the session or forget it the channel is dead */
if (switch_thread_rwlock_tryrdlock(session->rwlock) == SWITCH_STATUS_SUCCESS) {
if (switch_core_session_read_lock(session) == SWITCH_STATUS_SUCCESS) {
if (switch_channel_get_state(session->channel) < CS_HANGUP) {
status = switch_core_session_queue_event(session, event);
}
switch_thread_rwlock_unlock(session->rwlock);
switch_core_session_rwunlock(session);
}
}
switch_mutex_unlock(runtime.session_table_mutex);
@ -1654,7 +1707,7 @@ SWITCH_DECLARE(switch_status_t) switch_core_session_receive_event(switch_core_se
assert(session != NULL);
/* Acquire a read lock on the session or forget it the channel is dead */
if (switch_thread_rwlock_tryrdlock(session->rwlock) == SWITCH_STATUS_SUCCESS) {
if (switch_core_session_read_lock(session) == SWITCH_STATUS_SUCCESS) {
if (switch_channel_get_state(session->channel) < CS_HANGUP) {
if (session->endpoint_interface->io_routines->receive_event) {
status = session->endpoint_interface->io_routines->receive_event(session, *event);
@ -1676,7 +1729,7 @@ SWITCH_DECLARE(switch_status_t) switch_core_session_receive_event(switch_core_se
switch_event_destroy(event);
}
}
switch_thread_rwlock_unlock(session->rwlock);
switch_core_session_rwunlock(session);
}
return status;
@ -4182,6 +4235,8 @@ SWITCH_DECLARE(switch_status_t) switch_core_destroy(int vg)
runtime.console = NULL;
}
switch_yield(1000000);
if (runtime.memory_pool) {
apr_pool_destroy(runtime.memory_pool);
if (!vg) {