From c0e6f7ecbf77ef59e7e4948dd96109417a4994d5 Mon Sep 17 00:00:00 2001 From: David Robillard Date: Wed, 9 May 2012 02:04:05 +0000 Subject: SocketInterface => SocketReader. git-svn-id: http://svn.drobilla.net/lad/trunk/ingen@4325 a436a847-0d15-0410-975c-d299462d15a1 --- src/socket/SocketReader.cpp | 187 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 187 insertions(+) create mode 100644 src/socket/SocketReader.cpp (limited to 'src/socket/SocketReader.cpp') diff --git a/src/socket/SocketReader.cpp b/src/socket/SocketReader.cpp new file mode 100644 index 00000000..8b3ed7a1 --- /dev/null +++ b/src/socket/SocketReader.cpp @@ -0,0 +1,187 @@ +/* + This file is part of Ingen. + Copyright 2007-2012 David Robillard + + 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 . +*/ + +#include +#include + +#include "ingen/Interface.hpp" +#include "ingen/shared/World.hpp" +#include "ingen/shared/AtomReader.hpp" +#include "sord/sordmm.hpp" +#include "sratom/sratom.h" +#include "SocketReader.hpp" + +#define LOG(s) s << "[SocketReader] " + +namespace Ingen { +namespace Socket { + +SocketReader::SocketReader(Ingen::Shared::World& world, + Interface& iface, + int conn) + : _world(world) + , _iface(iface) + , _inserter(NULL) + , _msg_node(NULL) + , _conn(conn) +{ + set_name("SocketReader"); + start(); +} + +SocketReader::~SocketReader() +{ + stop(); + join(); + close(_conn); +} + +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.lv2_uri_map()->urid_map_feature()->urid_map; + + // Use as base URI so e.g. will be a path + SordNode* base_uri = sord_new_uri( + world->c_obj(), (const uint8_t*)"path:"); + + // 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)); + + // Read directly from the connection with serd + FILE* f = fdopen(_conn, "r"); + if (!f) { + LOG(Raul::error) << "Failed to open connection " << _conn + << "(" << strerror(errno) << ")" << std::endl; + // Connection gone, exit + _conn = -1; + return; + } + + serd_reader_start_stream(reader, f, (const uint8_t*)"(socket)", false); + + // Make an AtomReader to call Ingen Interface methods based on Atom + Shared::AtomReader ar(*_world.lv2_uri_map().get(), + *_world.uris().get(), + _world.forge(), + _iface); + + struct pollfd pfd; + pfd.fd = _conn; + pfd.events = POLLIN; + pfd.revents = 0; + + while (!_exit_flag) { + // Wait for input to arrive at socket + int ret = poll(&pfd, 1, -1); + if (ret == -1 || (pfd.revents & (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) { + continue; // Read nothing, e.g. just whitespace + } else if (st) { + fprintf(stderr, "Read error: %s\n", serd_strerror(st)); + } + + // 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((LV2_Atom*)chunk.buf); + + // Respond and close connection + write(_conn, "OK", 2); + + // 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); + + delete this; +} + +} // namespace Ingen +} // namespace Socket -- cgit v1.2.1