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Diffstat (limited to 'src/SocketReader.cpp')
| -rw-r--r-- | src/SocketReader.cpp | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/src/SocketReader.cpp b/src/SocketReader.cpp new file mode 100644 index 00000000..125d904f --- /dev/null +++ b/src/SocketReader.cpp @@ -0,0 +1,187 @@ +/* + This file is part of Ingen. + Copyright 2007-2015 David Robillard <http://drobilla.net/> + + Ingen is free software: you can redistribute it and/or modify it under the + terms of the GNU Affero General Public License as published by the Free + Software Foundation, either version 3 of the License, or any later version. + + Ingen is distributed in the hope that it will be useful, but WITHOUT ANY + WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR + A PARTICULAR PURPOSE. See the GNU Affero General Public License for details. + + You should have received a copy of the GNU Affero General Public License + along with Ingen. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <errno.h> +#include <poll.h> + +#include "ingen/AtomReader.hpp" +#include "ingen/Interface.hpp" +#include "ingen/Log.hpp" +#include "ingen/SocketReader.hpp" +#include "ingen/URIMap.hpp" +#include "ingen/World.hpp" +#include "sord/sordmm.hpp" +#include "sratom/sratom.h" + +namespace Ingen { + +SocketReader::SocketReader(Ingen::World& world, + Interface& iface, + SPtr<Raul::Socket> sock) + : _world(world) + , _iface(iface) + , _inserter(NULL) + , _msg_node(NULL) + , _socket(sock) + , _exit_flag(false) + , _thread(&SocketReader::run, this) +{} + +SocketReader::~SocketReader() +{ + _exit_flag = true; + _socket->shutdown(); + _thread.join(); +} + +SerdStatus +SocketReader::set_base_uri(SocketReader* iface, + const SerdNode* uri_node) +{ + return sord_inserter_set_base_uri(iface->_inserter, uri_node); +} + +SerdStatus +SocketReader::set_prefix(SocketReader* iface, + const SerdNode* name, + const SerdNode* uri_node) +{ + return sord_inserter_set_prefix(iface->_inserter, name, uri_node); +} + +SerdStatus +SocketReader::write_statement(SocketReader* iface, + SerdStatementFlags flags, + const SerdNode* graph, + const SerdNode* subject, + const SerdNode* predicate, + const SerdNode* object, + const SerdNode* object_datatype, + const SerdNode* object_lang) +{ + if (!iface->_msg_node) { + iface->_msg_node = sord_node_from_serd_node( + iface->_world.rdf_world()->c_obj(), iface->_env, subject, 0, 0); + } + + return sord_inserter_write_statement( + iface->_inserter, flags, graph, + subject, predicate, object, + object_datatype, object_lang); +} + +void +SocketReader::run() +{ + Sord::World* world = _world.rdf_world(); + LV2_URID_Map* map = &_world.uri_map().urid_map_feature()->urid_map; + + // Open socket as a FILE for reading directly with serd + FILE* f = fdopen(_socket->fd(), "r"); + if (!f) { + _world.log().error(fmt("Failed to open connection (%1%)\n") + % strerror(errno)); + // Connection gone, exit + _socket.reset(); + return; + } + + // Use <ingen:/root/> as base URI so e.g. </foo/bar> will be a path + SordNode* base_uri = sord_new_uri( + world->c_obj(), (const uint8_t*)"ingen:/root/"); + + // Set up sratom and a forge to build LV2 atoms from model + Sratom* sratom = sratom_new(map); + SerdChunk chunk = { NULL, 0 }; + LV2_Atom_Forge forge; + lv2_atom_forge_init(&forge, map); + lv2_atom_forge_set_sink( + &forge, sratom_forge_sink, sratom_forge_deref, &chunk); + + // Make a model and reader to parse the next Turtle message + _env = world->prefixes().c_obj(); + SordModel* model = sord_new(world->c_obj(), SORD_SPO, false); + + _inserter = sord_inserter_new(model, _env); + + SerdReader* reader = serd_reader_new( + SERD_TURTLE, this, NULL, + (SerdBaseSink)set_base_uri, + (SerdPrefixSink)set_prefix, + (SerdStatementSink)write_statement, + NULL); + + serd_env_set_base_uri(_env, sord_node_to_serd_node(base_uri)); + serd_reader_start_stream(reader, f, (const uint8_t*)"(socket)", false); + + // Make an AtomReader to call Ingen Interface methods based on Atom + AtomReader ar(_world.uri_map(), + _world.uris(), + _world.log(), + _world.forge(), + _iface); + + struct pollfd pfd; + pfd.fd = _socket->fd(); + pfd.events = POLLIN; + pfd.revents = 0; + + while (!_exit_flag) { + if (feof(f)) { + break; // Lost connection + } + + // Wait for input to arrive at socket + int ret = poll(&pfd, 1, -1); + if (ret == -1 || (pfd.revents & (POLLERR|POLLHUP|POLLNVAL))) { + break; // Hangup + } else if (!ret) { + continue; // No data, shouldn't happen + } + + // Read until the next '.' + SerdStatus st = serd_reader_read_chunk(reader); + if (st == SERD_FAILURE || !_msg_node) { + continue; // Read nothing, e.g. just whitespace + } else if (st) { + _world.log().error(fmt("Read error: %1%\n") + % serd_strerror(st)); + continue; + } + + // Build an LV2_Atom at chunk.buf from the message + sratom_read(sratom, &forge, world->c_obj(), model, _msg_node); + + // Call _iface methods based on atom content + ar.write((const LV2_Atom*)chunk.buf); + + // Reset everything for the next iteration + chunk.len = 0; + sord_node_free(world->c_obj(), _msg_node); + _msg_node = NULL; + } + + fclose(f); + sord_inserter_free(_inserter); + serd_reader_end_stream(reader); + sratom_free(sratom); + serd_reader_free(reader); + sord_free(model); + free((uint8_t*)chunk.buf); + _socket.reset(); +} + +} // namespace Ingen |