Module: sip-router Branch: master Commit: f971c09ff103cfe61bbf8bf930905432ca528b95 URL: http://git.sip-router.org/cgi-bin/gitweb.cgi/sip-router/?a=commit;h=f971c09… Author: Jan Janak &lt;jan(a)iptel.org&gt; Committer: Jan Janak &lt;jan(a)iptel.org&gt; Date: Mon Mar 23 15:04:41 2009 +0100 Kamailio compatiblity: Added pointer to a free function to tm callbacks This patch adds a new pointer to the tm_callback structure. The parameter contains pointer to a function which, if not NULL, will be called to dispose the callback parameter when it is not needed anymore. This is useful if the parameter given ti a transaction callback is a complex data structure of it is stored on the heap and the memory needs to be free when the corresponding transaction is being destroyed. Patch contributed by Ovidiu Sas. --- modules/tm/h_table.c | 3 +++ modules/tm/t_hooks.c | 9 ++++++--- modules/tm/t_hooks.h | 13 ++++++++++--- modules/tm/uac.c | 3 ++- 4 files changed, 21 insertions(+), 7 deletions(-) diff --git a/modules/tm/h_table.c b/modules/tm/h_table.c index 6b38496..11fb1a8 100644 --- a/modules/tm/h_table.c +++ b/modules/tm/h_table.c @@ -141,6 +141,9 @@ void free_cell( struct cell* dead_cell ) for( cbs=(struct tm_callback*)dead_cell->tmcb_hl.first ; cbs ; ) { cbs_tmp = cbs; cbs = cbs->next; + if (cbs_tmp->release) { + cbs_tmp->release(cbs_tmp->param); + } shm_free_unsafe( cbs_tmp ); } diff --git a/modules/tm/t_hooks.c b/modules/tm/t_hooks.c index 788172a..6e149ea 100644 --- a/modules/tm/t_hooks.c +++ b/modules/tm/t_hooks.c @@ -117,7 +117,8 @@ void destroy_tmcb_lists() /* lockless insert: should be always safe */ int insert_tmcb(struct tmcb_head_list *cb_list, int types, - transaction_cb f, void *param ) + transaction_cb f, void *param, + release_tmcb_param rel_func) { struct tm_callback *cbp; struct tm_callback *old; @@ -133,6 +134,7 @@ int insert_tmcb(struct tmcb_head_list *cb_list, int types, /* ... and fill it up */ cbp->callback = f; cbp->param = param; + cbp->release = rel_func; cbp->types = types; cbp->id=0; old=(struct tm_callback*)cb_list->first; @@ -164,7 +166,8 @@ int insert_tmcb(struct tmcb_head_list *cb_list, int types, * from mod_init (before forking!). */ int register_tmcb( struct sip_msg* p_msg, struct cell *t, int types, - transaction_cb f, void *param ) + transaction_cb f, void *param, + release_tmcb_param rel_func) { //struct cell* t; struct tmcb_head_list *cb_list; @@ -217,7 +220,7 @@ int register_tmcb( struct sip_msg* p_msg, struct cell *t, int types, cb_list = &(t->tmcb_hl); } - return insert_tmcb( cb_list, types, f, param ); + return insert_tmcb( cb_list, types, f, param, rel_func ); } diff --git a/modules/tm/t_hooks.h b/modules/tm/t_hooks.h index 38721fb..b396737 100644 --- a/modules/tm/t_hooks.h +++ b/modules/tm/t_hooks.h @@ -385,9 +385,12 @@ do{ \ /* callback function prototype */ typedef void (transaction_cb) (struct cell* t, int type, struct tmcb_params*); +/*! \brief function to release the callback param */ +typedef void (release_tmcb_param) (void* param); /* register callback function prototype */ typedef int (*register_tmcb_f)(struct sip_msg* p_msg, struct cell *t, - int cb_types, transaction_cb f, void *param); + int cb_types, transaction_cb f, void *param, + release_tmcb_param func); struct tm_callback { @@ -395,6 +398,8 @@ struct tm_callback { int types; /* types of events that trigger the callback*/ transaction_cb* callback; /* callback function */ void *param; /* param to be passed to callback function */ + release_tmcb_param* release; /**< Function to release the callback param + * when the callback is deleted */ struct tm_callback* next; }; @@ -423,11 +428,13 @@ void destroy_tmcb_lists(); /* register a callback for several types of events */ int register_tmcb( struct sip_msg* p_msg, struct cell *t, int types, - transaction_cb f, void *param ); + transaction_cb f, void *param, + release_tmcb_param rel_func); /* inserts a callback into the a callback list */ int insert_tmcb(struct tmcb_head_list *cb_list, int types, - transaction_cb f, void *param ); + transaction_cb f, void *param, + release_tmcb_param rel_func); /* run all transaction callbacks for an event type */ void run_trans_callbacks( int type , struct cell *trans, diff --git a/modules/tm/uac.c b/modules/tm/uac.c index 50089c0..6dfd0fc 100644 --- a/modules/tm/uac.c +++ b/modules/tm/uac.c @@ -319,7 +319,8 @@ static inline int t_uac_prepare(uac_req_t *uac_r, /* Register the callbacks after everything is successful and nothing can fail. Otherwise the callback parameter would be freed twise, once from TMCB_DESTROY, and again because of the negative return code. */ - if(uac_r->cb && insert_tmcb(&(new_cell->tmcb_hl), uac_r->cb_flags, *(uac_r->cb), uac_r->cbp)!=1){ + if(uac_r->cb && insert_tmcb(&(new_cell->tmcb_hl), uac_r->cb_flags, + *(uac_r->cb), uac_r->cbp, NULL)!=1){ ret=E_OUT_OF_MEM; LOG(L_ERR, "t_uac: short of tmcb shmem\n"); goto error1;