void grpc_metadata_batch_add_head(grpc_metadata_batch *batch, grpc_linked_mdelem *storage, grpc_mdelem *elem_to_add) { GPR_ASSERT(elem_to_add); storage->md = elem_to_add; grpc_metadata_batch_link_head(batch, storage); }
static int fill_send_ops(grpc_call *call, grpc_transport_op *op) { grpc_ioreq_data data; grpc_metadata_batch mdb; size_t i; char status_str[GPR_LTOA_MIN_BUFSIZE]; GPR_ASSERT(op->send_ops == NULL); switch (call->write_state) { case WRITE_STATE_INITIAL: if (!is_op_live(call, GRPC_IOREQ_SEND_INITIAL_METADATA)) { break; } data = call->request_data[GRPC_IOREQ_SEND_INITIAL_METADATA]; mdb.list = chain_metadata_from_app(call, data.send_metadata.count, data.send_metadata.metadata); mdb.garbage.head = mdb.garbage.tail = NULL; mdb.deadline = call->send_deadline; for (i = 0; i < call->send_initial_metadata_count; i++) { grpc_metadata_batch_link_head(&mdb, &call->send_initial_metadata[i]); } grpc_sopb_add_metadata(&call->send_ops, mdb); op->send_ops = &call->send_ops; op->bind_pollset = grpc_cq_pollset(call->cq); call->last_send_contains |= 1 << GRPC_IOREQ_SEND_INITIAL_METADATA; call->write_state = WRITE_STATE_STARTED; call->send_initial_metadata_count = 0; /* fall through intended */ case WRITE_STATE_STARTED: if (is_op_live(call, GRPC_IOREQ_SEND_MESSAGE)) { data = call->request_data[GRPC_IOREQ_SEND_MESSAGE]; grpc_sopb_add_begin_message( &call->send_ops, grpc_byte_buffer_length(data.send_message), 0); copy_byte_buffer_to_stream_ops(data.send_message, &call->send_ops); op->send_ops = &call->send_ops; call->last_send_contains |= 1 << GRPC_IOREQ_SEND_MESSAGE; } if (is_op_live(call, GRPC_IOREQ_SEND_CLOSE)) { op->is_last_send = 1; op->send_ops = &call->send_ops; call->last_send_contains |= 1 << GRPC_IOREQ_SEND_CLOSE; call->write_state = WRITE_STATE_WRITE_CLOSED; if (!call->is_client) { /* send trailing metadata */ data = call->request_data[GRPC_IOREQ_SEND_TRAILING_METADATA]; mdb.list = chain_metadata_from_app(call, data.send_metadata.count, data.send_metadata.metadata); mdb.garbage.head = mdb.garbage.tail = NULL; mdb.deadline = gpr_inf_future; /* send status */ /* TODO(ctiller): cache common status values */ data = call->request_data[GRPC_IOREQ_SEND_STATUS]; gpr_ltoa(data.send_status.code, status_str); grpc_metadata_batch_add_tail( &mdb, &call->status_link, grpc_mdelem_from_metadata_strings( call->metadata_context, grpc_mdstr_ref(grpc_channel_get_status_string(call->channel)), grpc_mdstr_from_string(call->metadata_context, status_str))); if (data.send_status.details) { grpc_metadata_batch_add_tail( &mdb, &call->details_link, grpc_mdelem_from_metadata_strings( call->metadata_context, grpc_mdstr_ref( grpc_channel_get_message_string(call->channel)), grpc_mdstr_from_string(call->metadata_context, data.send_status.details))); } grpc_sopb_add_metadata(&call->send_ops, mdb); } } break; case WRITE_STATE_WRITE_CLOSED: break; } if (op->send_ops) { op->on_done_send = call_on_done_send; op->send_user_data = call; } return op->send_ops != NULL; }