static void cc_on_config_changed(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) { channel_data *chand = arg; grpc_lb_policy *lb_policy = NULL; grpc_lb_policy *old_lb_policy; grpc_connectivity_state state = GRPC_CHANNEL_TRANSIENT_FAILURE; int exit_idle = 0; grpc_error *state_error = GRPC_ERROR_CREATE("No load balancing policy"); if (chand->incoming_configuration != NULL) { lb_policy = grpc_client_config_get_lb_policy(chand->incoming_configuration); if (lb_policy != NULL) { GRPC_LB_POLICY_REF(lb_policy, "channel"); GRPC_LB_POLICY_REF(lb_policy, "config_change"); GRPC_ERROR_UNREF(state_error); state = grpc_lb_policy_check_connectivity(exec_ctx, lb_policy, &state_error); } grpc_client_config_unref(exec_ctx, chand->incoming_configuration); } chand->incoming_configuration = NULL; if (lb_policy != NULL) { grpc_pollset_set_add_pollset_set(exec_ctx, lb_policy->interested_parties, chand->interested_parties); } gpr_mu_lock(&chand->mu_config); old_lb_policy = chand->lb_policy; chand->lb_policy = lb_policy; if (lb_policy != NULL) { grpc_exec_ctx_enqueue_list(exec_ctx, &chand->waiting_for_config_closures, NULL); } else if (chand->resolver == NULL /* disconnected */) { grpc_closure_list_fail_all( &chand->waiting_for_config_closures, GRPC_ERROR_CREATE_REFERENCING("Channel disconnected", &error, 1)); grpc_exec_ctx_enqueue_list(exec_ctx, &chand->waiting_for_config_closures, NULL); } if (lb_policy != NULL && chand->exit_idle_when_lb_policy_arrives) { GRPC_LB_POLICY_REF(lb_policy, "exit_idle"); exit_idle = 1; chand->exit_idle_when_lb_policy_arrives = 0; } if (error == GRPC_ERROR_NONE && chand->resolver) { set_channel_connectivity_state_locked( exec_ctx, chand, state, GRPC_ERROR_REF(state_error), "new_lb+resolver"); if (lb_policy != NULL) { watch_lb_policy(exec_ctx, chand, lb_policy, state); } GRPC_CHANNEL_STACK_REF(chand->owning_stack, "resolver"); grpc_resolver_next(exec_ctx, chand->resolver, &chand->incoming_configuration, &chand->on_config_changed); gpr_mu_unlock(&chand->mu_config); } else { if (chand->resolver != NULL) { grpc_resolver_shutdown(exec_ctx, chand->resolver); GRPC_RESOLVER_UNREF(exec_ctx, chand->resolver, "channel"); chand->resolver = NULL; } grpc_error *refs[] = {error, state_error}; set_channel_connectivity_state_locked( exec_ctx, chand, GRPC_CHANNEL_SHUTDOWN, GRPC_ERROR_CREATE_REFERENCING("Got config after disconnection", refs, GPR_ARRAY_SIZE(refs)), "resolver_gone"); gpr_mu_unlock(&chand->mu_config); } if (exit_idle) { grpc_lb_policy_exit_idle(exec_ctx, lb_policy); GRPC_LB_POLICY_UNREF(exec_ctx, lb_policy, "exit_idle"); } if (old_lb_policy != NULL) { grpc_pollset_set_del_pollset_set( exec_ctx, old_lb_policy->interested_parties, chand->interested_parties); GRPC_LB_POLICY_UNREF(exec_ctx, old_lb_policy, "channel"); } if (lb_policy != NULL) { GRPC_LB_POLICY_UNREF(exec_ctx, lb_policy, "config_change"); } GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->owning_stack, "resolver"); GRPC_ERROR_UNREF(state_error); }
static void cc_on_config_changed(grpc_exec_ctx *exec_ctx, void *arg, bool iomgr_success) { channel_data *chand = arg; grpc_lb_policy *lb_policy = NULL; grpc_lb_policy *old_lb_policy; grpc_connectivity_state state = GRPC_CHANNEL_TRANSIENT_FAILURE; int exit_idle = 0; if (chand->incoming_configuration != NULL) { lb_policy = grpc_client_config_get_lb_policy(chand->incoming_configuration); if (lb_policy != NULL) { GRPC_LB_POLICY_REF(lb_policy, "channel"); GRPC_LB_POLICY_REF(lb_policy, "config_change"); state = grpc_lb_policy_check_connectivity(exec_ctx, lb_policy); } grpc_client_config_unref(exec_ctx, chand->incoming_configuration); } chand->incoming_configuration = NULL; if (lb_policy != NULL) { grpc_pollset_set_add_pollset_set(exec_ctx, lb_policy->interested_parties, chand->interested_parties); } gpr_mu_lock(&chand->mu_config); old_lb_policy = chand->lb_policy; chand->lb_policy = lb_policy; if (lb_policy != NULL || chand->resolver == NULL /* disconnected */) { grpc_exec_ctx_enqueue_list(exec_ctx, &chand->waiting_for_config_closures, NULL); } if (lb_policy != NULL && chand->exit_idle_when_lb_policy_arrives) { GRPC_LB_POLICY_REF(lb_policy, "exit_idle"); exit_idle = 1; chand->exit_idle_when_lb_policy_arrives = 0; } if (iomgr_success && chand->resolver) { set_channel_connectivity_state_locked(exec_ctx, chand, state, "new_lb+resolver"); if (lb_policy != NULL) { watch_lb_policy(exec_ctx, chand, lb_policy, state); } GRPC_CHANNEL_STACK_REF(chand->owning_stack, "resolver"); grpc_resolver_next(exec_ctx, chand->resolver, &chand->incoming_configuration, &chand->on_config_changed); gpr_mu_unlock(&chand->mu_config); } else { if (chand->resolver != NULL) { grpc_resolver_shutdown(exec_ctx, chand->resolver); GRPC_RESOLVER_UNREF(exec_ctx, chand->resolver, "channel"); chand->resolver = NULL; } set_channel_connectivity_state_locked( exec_ctx, chand, GRPC_CHANNEL_FATAL_FAILURE, "resolver_gone"); gpr_mu_unlock(&chand->mu_config); } if (exit_idle) { grpc_lb_policy_exit_idle(exec_ctx, lb_policy); GRPC_LB_POLICY_UNREF(exec_ctx, lb_policy, "exit_idle"); } if (old_lb_policy != NULL) { grpc_pollset_set_del_pollset_set( exec_ctx, old_lb_policy->interested_parties, chand->interested_parties); GRPC_LB_POLICY_UNREF(exec_ctx, old_lb_policy, "channel"); } if (lb_policy != NULL) { GRPC_LB_POLICY_UNREF(exec_ctx, lb_policy, "config_change"); } GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->owning_stack, "resolver"); }