/* * Decrease transport data reference, destroy it when the reference count * reaches zero. */ PJ_DEF(pj_status_t) pjsip_tx_data_dec_ref( pjsip_tx_data *tdata ) { pj_assert( pj_atomic_get(tdata->ref_cnt) > 0); if (pj_atomic_dec_and_get(tdata->ref_cnt) <= 0) { PJ_LOG(5,(tdata->obj_name, "Destroying txdata %s", pjsip_tx_data_get_info(tdata))); pjsip_tpselector_dec_ref(&tdata->tp_sel); #if defined(PJ_DEBUG) && PJ_DEBUG!=0 pj_atomic_dec( tdata->mgr->tdata_counter ); #endif pj_atomic_destroy( tdata->ref_cnt ); pj_lock_destroy( tdata->lock ); pjsip_endpt_release_pool( tdata->mgr->endpt, tdata->pool ); return PJSIP_EBUFDESTROYED; } else { return PJ_SUCCESS; } }
PJ_DEF(pj_status_t) pjsip_regc_send(pjsip_regc *regc, pjsip_tx_data *tdata) { pj_status_t status; pjsip_cseq_hdr *cseq_hdr; pjsip_expires_hdr *expires_hdr; pj_uint32_t cseq; pj_atomic_inc(regc->busy_ctr); pj_lock_acquire(regc->lock); /* Make sure we don't have pending transaction. */ if (regc->has_tsx) { PJ_LOG(4,(THIS_FILE, "Unable to send request, regc has another " "transaction pending")); pjsip_tx_data_dec_ref( tdata ); pj_lock_release(regc->lock); pj_atomic_dec(regc->busy_ctr); return PJSIP_EBUSY; } pj_assert(regc->current_op == REGC_IDLE); /* Invalidate message buffer. */ pjsip_tx_data_invalidate_msg(tdata); /* Increment CSeq */ cseq = ++regc->cseq_hdr->cseq; cseq_hdr = (pjsip_cseq_hdr*) pjsip_msg_find_hdr(tdata->msg, PJSIP_H_CSEQ, NULL); cseq_hdr->cseq = cseq; /* Find Expires header */ expires_hdr = (pjsip_expires_hdr*) pjsip_msg_find_hdr(tdata->msg, PJSIP_H_EXPIRES, NULL); /* Bind to transport selector */ pjsip_tx_data_set_transport(tdata, ®c->tp_sel); regc->has_tsx = PJ_TRUE; /* Set current operation based on the value of Expires header */ if (expires_hdr && expires_hdr->ivalue==0) regc->current_op = REGC_UNREGISTERING; else regc->current_op = REGC_REGISTERING; /* Prevent deletion of tdata, e.g: when something wrong in sending, * we need tdata to retrieve the transport. */ pjsip_tx_data_add_ref(tdata); /* If via_addr is set, use this address for the Via header. */ if (regc->via_addr.host.slen > 0) { tdata->via_addr = regc->via_addr; tdata->via_tp = regc->via_tp; } /* Need to unlock the regc temporarily while sending the message to * prevent deadlock (https://trac.pjsip.org/repos/ticket/1247). * It should be safe to do this since the regc's refcount has been * incremented. */ pj_lock_release(regc->lock); /* Now send the message */ status = pjsip_endpt_send_request(regc->endpt, tdata, REGC_TSX_TIMEOUT, regc, ®c_tsx_callback); if (status!=PJ_SUCCESS) { PJ_LOG(4,(THIS_FILE, "Error sending request, status=%d", status)); } /* Reacquire the lock */ pj_lock_acquire(regc->lock); /* Get last transport used and add reference to it */ if (tdata->tp_info.transport != regc->last_transport && status==PJ_SUCCESS) { if (regc->last_transport) { pjsip_transport_dec_ref(regc->last_transport); regc->last_transport = NULL; } if (tdata->tp_info.transport) { regc->last_transport = tdata->tp_info.transport; pjsip_transport_add_ref(regc->last_transport); } } /* Release tdata */ pjsip_tx_data_dec_ref(tdata); pj_lock_release(regc->lock); /* Delete the record if user destroy regc during the callback. */ if (pj_atomic_dec_and_get(regc->busy_ctr)==0 && regc->_delete_flag) { pjsip_regc_destroy(regc); } return status; }
// // Decrement. // void dec() { pj_atomic_dec(var_); }
PJ_DEF(pj_status_t) pjsip_regc_send(pjsip_regc *regc, pjsip_tx_data *tdata) { pj_status_t status; pjsip_cseq_hdr *cseq_hdr; pjsip_expires_hdr *expires_hdr; pj_uint32_t cseq; pj_atomic_inc(regc->busy_ctr); pj_lock_acquire(regc->lock); /* Make sure we don't have pending transaction. */ if (regc->has_tsx) { PJ_LOG(4,(THIS_FILE, "Unable to send request, regc has another " "transaction pending")); pjsip_tx_data_dec_ref( tdata ); pj_lock_release(regc->lock); pj_atomic_dec(regc->busy_ctr); return PJSIP_EBUSY; } pj_assert(regc->current_op == REGC_IDLE); /* Invalidate message buffer. */ pjsip_tx_data_invalidate_msg(tdata); /* Increment CSeq */ cseq = ++regc->cseq_hdr->cseq; cseq_hdr = (pjsip_cseq_hdr*) pjsip_msg_find_hdr(tdata->msg, PJSIP_H_CSEQ, NULL); cseq_hdr->cseq = cseq; /* Find Expires header */ expires_hdr = (pjsip_expires_hdr*) pjsip_msg_find_hdr(tdata->msg, PJSIP_H_EXPIRES, NULL); /* Bind to transport selector */ pjsip_tx_data_set_transport(tdata, ®c->tp_sel); regc->has_tsx = PJ_TRUE; /* Set current operation based on the value of Expires header */ if (expires_hdr && expires_hdr->ivalue==0) regc->current_op = REGC_UNREGISTERING; else regc->current_op = REGC_REGISTERING; status = pjsip_endpt_send_request(regc->endpt, tdata, REGC_TSX_TIMEOUT, regc, &tsx_callback); if (status!=PJ_SUCCESS) { PJ_LOG(4,(THIS_FILE, "Error sending request, status=%d", status)); } pj_lock_release(regc->lock); /* Delete the record if user destroy regc during the callback. */ if (pj_atomic_dec_and_get(regc->busy_ctr)==0 && regc->_delete_flag) { pjsip_regc_destroy(regc); } return status; }