static void subchannel_ready(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) { grpc_subchannel_call_holder *holder = arg; gpr_mu_lock(&holder->mu); GPR_ASSERT(holder->creation_phase == GRPC_SUBCHANNEL_CALL_HOLDER_PICKING_SUBCHANNEL); holder->creation_phase = GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING; if (holder->connected_subchannel == NULL) { gpr_atm_no_barrier_store(&holder->subchannel_call, 1); fail_locked(exec_ctx, holder, GRPC_ERROR_CREATE_REFERENCING("Failed to create subchannel", &error, 1)); } else if (1 == gpr_atm_acq_load(&holder->subchannel_call)) { /* already cancelled before subchannel became ready */ fail_locked(exec_ctx, holder, GRPC_ERROR_CREATE_REFERENCING( "Cancelled before creating subchannel", &error, 1)); } else { gpr_atm_rel_store( &holder->subchannel_call, (gpr_atm)(uintptr_t)grpc_connected_subchannel_create_call( exec_ctx, holder->connected_subchannel, holder->pollent)); retry_waiting_locked(exec_ctx, holder); } gpr_mu_unlock(&holder->mu); GRPC_CALL_STACK_UNREF(exec_ctx, holder->owning_call, "pick_subchannel"); }
static void subchannel_ready(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) { call_data *calld = arg; gpr_mu_lock(&calld->mu); GPR_ASSERT(calld->creation_phase == GRPC_SUBCHANNEL_CALL_HOLDER_PICKING_SUBCHANNEL); calld->creation_phase = GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING; if (calld->connected_subchannel == NULL) { gpr_atm_no_barrier_store(&calld->subchannel_call, 1); fail_locked(exec_ctx, calld, GRPC_ERROR_CREATE_REFERENCING( "Failed to create subchannel", &error, 1)); } else if (1 == gpr_atm_acq_load(&calld->subchannel_call)) { /* already cancelled before subchannel became ready */ fail_locked(exec_ctx, calld, GRPC_ERROR_CREATE_REFERENCING( "Cancelled before creating subchannel", &error, 1)); } else { grpc_subchannel_call *subchannel_call = NULL; grpc_error *new_error = grpc_connected_subchannel_create_call( exec_ctx, calld->connected_subchannel, calld->pollent, &subchannel_call); if (new_error != GRPC_ERROR_NONE) { new_error = grpc_error_add_child(new_error, error); subchannel_call = CANCELLED_CALL; fail_locked(exec_ctx, calld, new_error); } gpr_atm_rel_store(&calld->subchannel_call, (gpr_atm)(uintptr_t)subchannel_call); retry_waiting_locked(exec_ctx, calld); } gpr_mu_unlock(&calld->mu); GRPC_CALL_STACK_UNREF(exec_ctx, calld->owning_call, "pick_subchannel"); }
static void test_create_channel_stack(void) { const grpc_channel_filter filter = { call_func, channel_func, sizeof(int), call_init_func, grpc_call_stack_ignore_set_pollset_or_pollset_set, call_destroy_func, sizeof(int), channel_init_func, channel_destroy_func, get_peer, "some_test_filter"}; const grpc_channel_filter *filters = &filter; grpc_channel_stack *channel_stack; grpc_call_stack *call_stack; grpc_channel_element *channel_elem; grpc_call_element *call_elem; grpc_arg arg; grpc_channel_args chan_args; int *channel_data; int *call_data; grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; arg.type = GRPC_ARG_INTEGER; arg.key = "test_key"; arg.value.integer = 42; chan_args.num_args = 1; chan_args.args = &arg; channel_stack = gpr_malloc(grpc_channel_stack_size(&filters, 1)); grpc_channel_stack_init(&exec_ctx, 1, free_channel, channel_stack, &filters, 1, &chan_args, NULL, "test", channel_stack); GPR_ASSERT(channel_stack->count == 1); channel_elem = grpc_channel_stack_element(channel_stack, 0); channel_data = (int *)channel_elem->channel_data; GPR_ASSERT(*channel_data == 0); call_stack = gpr_malloc(channel_stack->call_stack_size); grpc_call_stack_init(&exec_ctx, channel_stack, 1, free_call, call_stack, NULL, NULL, call_stack); GPR_ASSERT(call_stack->count == 1); call_elem = grpc_call_stack_element(call_stack, 0); GPR_ASSERT(call_elem->filter == channel_elem->filter); GPR_ASSERT(call_elem->channel_data == channel_elem->channel_data); call_data = (int *)call_elem->call_data; GPR_ASSERT(*call_data == 0); GPR_ASSERT(*channel_data == 1); GRPC_CALL_STACK_UNREF(&exec_ctx, call_stack, "done"); grpc_exec_ctx_flush(&exec_ctx); GPR_ASSERT(*channel_data == 2); GRPC_CHANNEL_STACK_UNREF(&exec_ctx, channel_stack, "done"); grpc_exec_ctx_finish(&exec_ctx); }
// Timer callback. static void timer_callback(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) { grpc_call_element* elem = arg; grpc_deadline_state* deadline_state = elem->call_data; gpr_mu_lock(&deadline_state->timer_mu); deadline_state->timer_pending = false; gpr_mu_unlock(&deadline_state->timer_mu); if (error != GRPC_ERROR_CANCELLED) { gpr_slice msg = gpr_slice_from_static_string("Deadline Exceeded"); grpc_call_element_send_cancel_with_message( exec_ctx, elem, GRPC_STATUS_DEADLINE_EXCEEDED, &msg); gpr_slice_unref(msg); } GRPC_CALL_STACK_UNREF(exec_ctx, deadline_state->call_stack, "deadline_timer"); }
// Gets data from the service config. Invoked when the resolver returns // its initial result. static void read_service_config(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) { grpc_call_element *elem = arg; channel_data *chand = elem->channel_data; call_data *calld = elem->call_data; // If this is an error, there's no point in looking at the service config. if (error == GRPC_ERROR_NONE) { // Get the method config table from channel data. gpr_mu_lock(&chand->mu); grpc_mdstr_hash_table *method_params_table = NULL; if (chand->method_params_table != NULL) { method_params_table = grpc_mdstr_hash_table_ref(chand->method_params_table); } gpr_mu_unlock(&chand->mu); // If the method config table was present, use it. if (method_params_table != NULL) { const method_parameters *method_params = grpc_method_config_table_get(method_params_table, calld->path); if (method_params != NULL) { const bool have_method_timeout = gpr_time_cmp(method_params->timeout, gpr_time_0(GPR_TIMESPAN)) != 0; if (have_method_timeout || method_params->wait_for_ready != WAIT_FOR_READY_UNSET) { gpr_mu_lock(&calld->mu); if (have_method_timeout) { const gpr_timespec per_method_deadline = gpr_time_add(calld->call_start_time, method_params->timeout); if (gpr_time_cmp(per_method_deadline, calld->deadline) < 0) { calld->deadline = per_method_deadline; // Reset deadline timer. grpc_deadline_state_reset(exec_ctx, elem, calld->deadline); } } if (method_params->wait_for_ready != WAIT_FOR_READY_UNSET) { calld->wait_for_ready_from_service_config = method_params->wait_for_ready; } gpr_mu_unlock(&calld->mu); } } grpc_mdstr_hash_table_unref(method_params_table); } } GRPC_CALL_STACK_UNREF(exec_ctx, calld->owning_call, "read_service_config"); }
static void subchannel_ready(grpc_exec_ctx *exec_ctx, void *arg, int success) { grpc_subchannel_call_holder *holder = arg; grpc_subchannel_call *call; gpr_mu_lock(&holder->mu); GPR_ASSERT(holder->creation_phase == GRPC_SUBCHANNEL_CALL_HOLDER_PICKING_SUBCHANNEL); call = GET_CALL(holder); GPR_ASSERT(call == NULL || call == CANCELLED_CALL); holder->creation_phase = GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING; if (holder->connected_subchannel == NULL) { fail_locked(exec_ctx, holder); } else { gpr_atm_rel_store( &holder->subchannel_call, (gpr_atm)(uintptr_t)grpc_connected_subchannel_create_call( exec_ctx, holder->connected_subchannel, holder->pollset)); retry_waiting_locked(exec_ctx, holder); } gpr_mu_unlock(&holder->mu); GRPC_CALL_STACK_UNREF(exec_ctx, holder->owning_call, "pick_subchannel"); }
static void subchannel_ready(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) { grpc_call_element *elem = arg; call_data *calld = elem->call_data; channel_data *chand = elem->channel_data; gpr_mu_lock(&calld->mu); GPR_ASSERT(calld->creation_phase == GRPC_SUBCHANNEL_CALL_HOLDER_PICKING_SUBCHANNEL); grpc_polling_entity_del_from_pollset_set(exec_ctx, calld->pollent, chand->interested_parties); calld->creation_phase = GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING; if (calld->connected_subchannel == NULL) { gpr_atm_no_barrier_store(&calld->subchannel_call, 1); fail_locked(exec_ctx, calld, GRPC_ERROR_CREATE_REFERENCING( "Failed to create subchannel", &error, 1)); } else if (GET_CALL(calld) == CANCELLED_CALL) { /* already cancelled before subchannel became ready */ fail_locked(exec_ctx, calld, GRPC_ERROR_CREATE_REFERENCING( "Cancelled before creating subchannel", &error, 1)); } else { /* Create call on subchannel. */ grpc_subchannel_call *subchannel_call = NULL; grpc_error *new_error = grpc_connected_subchannel_create_call( exec_ctx, calld->connected_subchannel, calld->pollent, calld->path, calld->deadline, &subchannel_call); if (new_error != GRPC_ERROR_NONE) { new_error = grpc_error_add_child(new_error, error); subchannel_call = CANCELLED_CALL; fail_locked(exec_ctx, calld, new_error); } gpr_atm_rel_store(&calld->subchannel_call, (gpr_atm)(uintptr_t)subchannel_call); retry_waiting_locked(exec_ctx, calld); } gpr_mu_unlock(&calld->mu); GRPC_CALL_STACK_UNREF(exec_ctx, calld->owning_call, "pick_subchannel"); }
// The logic here is fairly complicated, due to (a) the fact that we // need to handle the case where we receive the send op before the // initial metadata op, and (b) the need for efficiency, especially in // the streaming case. // TODO(ctiller): Explain this more thoroughly. static void cc_start_transport_stream_op(grpc_exec_ctx *exec_ctx, grpc_call_element *elem, grpc_transport_stream_op *op) { call_data *calld = elem->call_data; channel_data *chand = elem->channel_data; GRPC_CALL_LOG_OP(GPR_INFO, elem, op); grpc_deadline_state_client_start_transport_stream_op(exec_ctx, elem, op); /* try to (atomically) get the call */ grpc_subchannel_call *call = GET_CALL(calld); GPR_TIMER_BEGIN("cc_start_transport_stream_op", 0); if (call == CANCELLED_CALL) { grpc_transport_stream_op_finish_with_failure( exec_ctx, op, GRPC_ERROR_REF(calld->cancel_error)); GPR_TIMER_END("cc_start_transport_stream_op", 0); return; } if (call != NULL) { grpc_subchannel_call_process_op(exec_ctx, call, op); GPR_TIMER_END("cc_start_transport_stream_op", 0); return; } /* we failed; lock and figure out what to do */ gpr_mu_lock(&calld->mu); retry: /* need to recheck that another thread hasn't set the call */ call = GET_CALL(calld); if (call == CANCELLED_CALL) { gpr_mu_unlock(&calld->mu); grpc_transport_stream_op_finish_with_failure( exec_ctx, op, GRPC_ERROR_REF(calld->cancel_error)); GPR_TIMER_END("cc_start_transport_stream_op", 0); return; } if (call != NULL) { gpr_mu_unlock(&calld->mu); grpc_subchannel_call_process_op(exec_ctx, call, op); GPR_TIMER_END("cc_start_transport_stream_op", 0); return; } /* if this is a cancellation, then we can raise our cancelled flag */ if (op->cancel_error != GRPC_ERROR_NONE) { if (!gpr_atm_rel_cas(&calld->subchannel_call, 0, (gpr_atm)(uintptr_t)CANCELLED_CALL)) { goto retry; } else { // Stash a copy of cancel_error in our call data, so that we can use // it for subsequent operations. This ensures that if the call is // cancelled before any ops are passed down (e.g., if the deadline // is in the past when the call starts), we can return the right // error to the caller when the first op does get passed down. calld->cancel_error = GRPC_ERROR_REF(op->cancel_error); switch (calld->creation_phase) { case GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING: fail_locked(exec_ctx, calld, GRPC_ERROR_REF(op->cancel_error)); break; case GRPC_SUBCHANNEL_CALL_HOLDER_PICKING_SUBCHANNEL: pick_subchannel(exec_ctx, elem, NULL, 0, &calld->connected_subchannel, NULL, GRPC_ERROR_REF(op->cancel_error)); break; } gpr_mu_unlock(&calld->mu); grpc_transport_stream_op_finish_with_failure( exec_ctx, op, GRPC_ERROR_REF(op->cancel_error)); GPR_TIMER_END("cc_start_transport_stream_op", 0); return; } } /* if we don't have a subchannel, try to get one */ if (calld->creation_phase == GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING && calld->connected_subchannel == NULL && op->send_initial_metadata != NULL) { calld->creation_phase = GRPC_SUBCHANNEL_CALL_HOLDER_PICKING_SUBCHANNEL; grpc_closure_init(&calld->next_step, subchannel_ready, elem); GRPC_CALL_STACK_REF(calld->owning_call, "pick_subchannel"); /* If a subchannel is not available immediately, the polling entity from call_data should be provided to channel_data's interested_parties, so that IO of the lb_policy and resolver could be done under it. */ if (pick_subchannel(exec_ctx, elem, op->send_initial_metadata, op->send_initial_metadata_flags, &calld->connected_subchannel, &calld->next_step, GRPC_ERROR_NONE)) { calld->creation_phase = GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING; GRPC_CALL_STACK_UNREF(exec_ctx, calld->owning_call, "pick_subchannel"); } else { grpc_polling_entity_add_to_pollset_set(exec_ctx, calld->pollent, chand->interested_parties); } } /* if we've got a subchannel, then let's ask it to create a call */ if (calld->creation_phase == GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING && calld->connected_subchannel != NULL) { grpc_subchannel_call *subchannel_call = NULL; grpc_error *error = grpc_connected_subchannel_create_call( exec_ctx, calld->connected_subchannel, calld->pollent, calld->path, calld->deadline, &subchannel_call); if (error != GRPC_ERROR_NONE) { subchannel_call = CANCELLED_CALL; fail_locked(exec_ctx, calld, GRPC_ERROR_REF(error)); grpc_transport_stream_op_finish_with_failure(exec_ctx, op, error); } gpr_atm_rel_store(&calld->subchannel_call, (gpr_atm)(uintptr_t)subchannel_call); retry_waiting_locked(exec_ctx, calld); goto retry; } /* nothing to be done but wait */ add_waiting_locked(calld, op); gpr_mu_unlock(&calld->mu); GPR_TIMER_END("cc_start_transport_stream_op", 0); }
// The logic here is fairly complicated, due to (a) the fact that we // need to handle the case where we receive the send op before the // initial metadata op, and (b) the need for efficiency, especially in // the streaming case. // TODO(ctiller): Explain this more thoroughly. static void cc_start_transport_stream_op(grpc_exec_ctx *exec_ctx, grpc_call_element *elem, grpc_transport_stream_op *op) { call_data *calld = elem->call_data; GRPC_CALL_LOG_OP(GPR_INFO, elem, op); /* try to (atomically) get the call */ grpc_subchannel_call *call = GET_CALL(calld); GPR_TIMER_BEGIN("cc_start_transport_stream_op", 0); if (call == CANCELLED_CALL) { grpc_transport_stream_op_finish_with_failure(exec_ctx, op, GRPC_ERROR_CANCELLED); GPR_TIMER_END("cc_start_transport_stream_op", 0); return; } if (call != NULL) { grpc_subchannel_call_process_op(exec_ctx, call, op); GPR_TIMER_END("cc_start_transport_stream_op", 0); return; } /* we failed; lock and figure out what to do */ gpr_mu_lock(&calld->mu); retry: /* need to recheck that another thread hasn't set the call */ call = GET_CALL(calld); if (call == CANCELLED_CALL) { gpr_mu_unlock(&calld->mu); grpc_transport_stream_op_finish_with_failure(exec_ctx, op, GRPC_ERROR_CANCELLED); GPR_TIMER_END("cc_start_transport_stream_op", 0); return; } if (call != NULL) { gpr_mu_unlock(&calld->mu); grpc_subchannel_call_process_op(exec_ctx, call, op); GPR_TIMER_END("cc_start_transport_stream_op", 0); return; } /* if this is a cancellation, then we can raise our cancelled flag */ if (op->cancel_error != GRPC_ERROR_NONE) { if (!gpr_atm_rel_cas(&calld->subchannel_call, 0, (gpr_atm)(uintptr_t)CANCELLED_CALL)) { goto retry; } else { switch (calld->creation_phase) { case GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING: fail_locked(exec_ctx, calld, GRPC_ERROR_REF(op->cancel_error)); break; case GRPC_SUBCHANNEL_CALL_HOLDER_PICKING_SUBCHANNEL: pick_subchannel(exec_ctx, elem, NULL, 0, &calld->connected_subchannel, NULL); break; } gpr_mu_unlock(&calld->mu); grpc_transport_stream_op_finish_with_failure(exec_ctx, op, GRPC_ERROR_CANCELLED); GPR_TIMER_END("cc_start_transport_stream_op", 0); return; } } /* if we don't have a subchannel, try to get one */ if (calld->creation_phase == GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING && calld->connected_subchannel == NULL && op->send_initial_metadata != NULL) { calld->creation_phase = GRPC_SUBCHANNEL_CALL_HOLDER_PICKING_SUBCHANNEL; grpc_closure_init(&calld->next_step, subchannel_ready, calld); GRPC_CALL_STACK_REF(calld->owning_call, "pick_subchannel"); if (pick_subchannel(exec_ctx, elem, op->send_initial_metadata, op->send_initial_metadata_flags, &calld->connected_subchannel, &calld->next_step)) { calld->creation_phase = GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING; GRPC_CALL_STACK_UNREF(exec_ctx, calld->owning_call, "pick_subchannel"); } } /* if we've got a subchannel, then let's ask it to create a call */ if (calld->creation_phase == GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING && calld->connected_subchannel != NULL) { grpc_subchannel_call *subchannel_call = NULL; grpc_error *error = grpc_connected_subchannel_create_call( exec_ctx, calld->connected_subchannel, calld->pollent, &subchannel_call); if (error != GRPC_ERROR_NONE) { subchannel_call = CANCELLED_CALL; fail_locked(exec_ctx, calld, GRPC_ERROR_REF(error)); grpc_transport_stream_op_finish_with_failure(exec_ctx, op, error); } gpr_atm_rel_store(&calld->subchannel_call, (gpr_atm)(uintptr_t)subchannel_call); retry_waiting_locked(exec_ctx, calld); goto retry; } /* nothing to be done but wait */ add_waiting_locked(calld, op); gpr_mu_unlock(&calld->mu); GPR_TIMER_END("cc_start_transport_stream_op", 0); }
void grpc_subchannel_call_holder_perform_op(grpc_exec_ctx *exec_ctx, grpc_subchannel_call_holder *holder, grpc_transport_stream_op *op) { /* try to (atomically) get the call */ grpc_subchannel_call *call = GET_CALL(holder); GPR_TIMER_BEGIN("grpc_subchannel_call_holder_perform_op", 0); if (call == CANCELLED_CALL) { grpc_transport_stream_op_finish_with_failure(exec_ctx, op); GPR_TIMER_END("grpc_subchannel_call_holder_perform_op", 0); return; } if (call != NULL) { grpc_subchannel_call_process_op(exec_ctx, call, op); GPR_TIMER_END("grpc_subchannel_call_holder_perform_op", 0); return; } /* we failed; lock and figure out what to do */ gpr_mu_lock(&holder->mu); retry: /* need to recheck that another thread hasn't set the call */ call = GET_CALL(holder); if (call == CANCELLED_CALL) { gpr_mu_unlock(&holder->mu); grpc_transport_stream_op_finish_with_failure(exec_ctx, op); GPR_TIMER_END("grpc_subchannel_call_holder_perform_op", 0); return; } if (call != NULL) { gpr_mu_unlock(&holder->mu); grpc_subchannel_call_process_op(exec_ctx, call, op); GPR_TIMER_END("grpc_subchannel_call_holder_perform_op", 0); return; } /* if this is a cancellation, then we can raise our cancelled flag */ if (op->cancel_with_status != GRPC_STATUS_OK) { if (!gpr_atm_rel_cas(&holder->subchannel_call, 0, 1)) { goto retry; } else { switch (holder->creation_phase) { case GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING: fail_locked(exec_ctx, holder); break; case GRPC_SUBCHANNEL_CALL_HOLDER_PICKING_SUBCHANNEL: holder->pick_subchannel(exec_ctx, holder->pick_subchannel_arg, NULL, &holder->connected_subchannel, NULL); break; } gpr_mu_unlock(&holder->mu); grpc_transport_stream_op_finish_with_failure(exec_ctx, op); GPR_TIMER_END("grpc_subchannel_call_holder_perform_op", 0); return; } } /* if we don't have a subchannel, try to get one */ if (holder->creation_phase == GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING && holder->connected_subchannel == NULL && op->send_initial_metadata != NULL) { holder->creation_phase = GRPC_SUBCHANNEL_CALL_HOLDER_PICKING_SUBCHANNEL; grpc_closure_init(&holder->next_step, subchannel_ready, holder); GRPC_CALL_STACK_REF(holder->owning_call, "pick_subchannel"); if (holder->pick_subchannel( exec_ctx, holder->pick_subchannel_arg, op->send_initial_metadata, &holder->connected_subchannel, &holder->next_step)) { holder->creation_phase = GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING; GRPC_CALL_STACK_UNREF(exec_ctx, holder->owning_call, "pick_subchannel"); } } /* if we've got a subchannel, then let's ask it to create a call */ if (holder->creation_phase == GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING && holder->connected_subchannel != NULL) { gpr_atm_rel_store( &holder->subchannel_call, (gpr_atm)(uintptr_t)grpc_connected_subchannel_create_call( exec_ctx, holder->connected_subchannel, holder->pollset)); retry_waiting_locked(exec_ctx, holder); goto retry; } /* nothing to be done but wait */ add_waiting_locked(holder, op); gpr_mu_unlock(&holder->mu); GPR_TIMER_END("grpc_subchannel_call_holder_perform_op", 0); }
static void test_create_channel_stack(void) { const grpc_channel_filter filter = { call_func, channel_func, sizeof(int), call_init_func, grpc_call_stack_ignore_set_pollset_or_pollset_set, call_destroy_func, sizeof(int), channel_init_func, channel_destroy_func, get_peer, grpc_channel_next_get_info, "some_test_filter"}; const grpc_channel_filter *filters = &filter; grpc_channel_stack *channel_stack; grpc_call_stack *call_stack; grpc_channel_element *channel_elem; grpc_call_element *call_elem; grpc_arg arg; grpc_channel_args chan_args; int *channel_data; int *call_data; grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; grpc_mdstr *path = grpc_mdstr_from_string("/service/method"); arg.type = GRPC_ARG_INTEGER; arg.key = "test_key"; arg.value.integer = 42; chan_args.num_args = 1; chan_args.args = &arg; channel_stack = gpr_malloc(grpc_channel_stack_size(&filters, 1)); grpc_channel_stack_init(&exec_ctx, 1, free_channel, channel_stack, &filters, 1, &chan_args, NULL, "test", channel_stack); GPR_ASSERT(channel_stack->count == 1); channel_elem = grpc_channel_stack_element(channel_stack, 0); channel_data = (int *)channel_elem->channel_data; GPR_ASSERT(*channel_data == 0); call_stack = gpr_malloc(channel_stack->call_stack_size); grpc_error *error = grpc_call_stack_init(&exec_ctx, channel_stack, 1, free_call, call_stack, NULL, NULL, path, gpr_now(GPR_CLOCK_MONOTONIC), gpr_inf_future(GPR_CLOCK_MONOTONIC), call_stack); GPR_ASSERT(error == GRPC_ERROR_NONE); GPR_ASSERT(call_stack->count == 1); call_elem = grpc_call_stack_element(call_stack, 0); GPR_ASSERT(call_elem->filter == channel_elem->filter); GPR_ASSERT(call_elem->channel_data == channel_elem->channel_data); call_data = (int *)call_elem->call_data; GPR_ASSERT(*call_data == 0); GPR_ASSERT(*channel_data == 1); GRPC_CALL_STACK_UNREF(&exec_ctx, call_stack, "done"); grpc_exec_ctx_flush(&exec_ctx); GPR_ASSERT(*channel_data == 2); GRPC_CHANNEL_STACK_UNREF(&exec_ctx, channel_stack, "done"); grpc_exec_ctx_finish(&exec_ctx); GRPC_MDSTR_UNREF(path); }