--- /dev/null
+/* -*- c++ -*- */
+/*
+ * Copyright 2006,2007 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_GR_FLOWGRAPH_H
+#define INCLUDED_GR_FLOWGRAPH_H
+
+#include <gr_basic_block.h>
+#include <iostream>
+
+/*!
+ * \brief Class representing a specific input or output graph endpoint
+ * \ingroup internal
+ */
+class gr_endpoint
+{
+private:
+ gr_basic_block_sptr d_basic_block;
+ int d_port;
+
+public:
+ gr_endpoint() : d_basic_block(), d_port(0) { }
+ gr_endpoint(gr_basic_block_sptr block, int port) { d_basic_block = block; d_port = port; }
+ gr_basic_block_sptr block() const { return d_basic_block; }
+ int port() const { return d_port; }
+
+ bool operator==(const gr_endpoint &other) const;
+};
+
+inline bool gr_endpoint::operator==(const gr_endpoint &other) const
+{
+ return (d_basic_block == other.d_basic_block &&
+ d_port == other.d_port);
+}
+
+// Hold vectors of gr_endpoint objects
+typedef std::vector<gr_endpoint> gr_endpoint_vector_t;
+typedef std::vector<gr_endpoint>::iterator gr_endpoint_viter_t;
+
+/*!
+ *\brief Class representing a connection between to graph endpoints
+ *
+ */
+class gr_edge
+{
+public:
+ gr_edge() : d_src(), d_dst() { };
+ gr_edge(const gr_endpoint &src, const gr_endpoint &dst) : d_src(src), d_dst(dst) { }
+ ~gr_edge();
+
+ const gr_endpoint &src() const { return d_src; }
+ const gr_endpoint &dst() const { return d_dst; }
+
+private:
+ gr_endpoint d_src;
+ gr_endpoint d_dst;
+};
+
+// Hold vectors of gr_edge objects
+typedef std::vector<gr_edge> gr_edge_vector_t;
+typedef std::vector<gr_edge>::iterator gr_edge_viter_t;
+
+
+// Create a shared pointer to a heap allocated flowgraph
+// (types defined in gr_runtime_types.h)
+gr_flowgraph_sptr gr_make_flowgraph();
+
+/*!
+ * \brief Class representing a directed, acyclic graph of basic blocks
+ * \ingroup internal
+ */
+class gr_flowgraph
+{
+public:
+ friend gr_flowgraph_sptr gr_make_flowgraph();
+
+ // Destruct an arbitrary flowgraph
+ ~gr_flowgraph();
+
+ // Connect two endpoints
+ void connect(const gr_endpoint &src, const gr_endpoint &dst);
+
+ // Disconnect two endpoints
+ void disconnect(const gr_endpoint &src, const gr_endpoint &dst);
+
+ // Connect an output port to an input port (convenience)
+ void connect(gr_basic_block_sptr src_block, int src_port,
+ gr_basic_block_sptr dst_block, int dst_port);
+
+ // Disconnect an input port from an output port (convenience)
+ void disconnect(gr_basic_block_sptr src_block, int src_port,
+ gr_basic_block_sptr dst_block, int dst_port);
+
+ // Validate connectivity, raise exception if invalid
+ void validate();
+
+ // Clear existing flowgraph
+ void clear();
+
+ // Return vector of edges
+ const gr_edge_vector_t &edges() const { return d_edges; }
+
+ // Return vector of connected blocks
+ gr_basic_block_vector_t calc_used_blocks();
+
+ // Return toplogically sorted vector of blocks. All the sources come first.
+ gr_basic_block_vector_t topological_sort(gr_basic_block_vector_t &blocks);
+
+ // Return vector of vectors of disjointly connected blocks, topologically
+ // sorted.
+ std::vector<gr_basic_block_vector_t> partition();
+
+protected:
+ gr_basic_block_vector_t d_blocks;
+ gr_edge_vector_t d_edges;
+
+ gr_flowgraph();
+ std::vector<int> calc_used_ports(gr_basic_block_sptr block, bool check_inputs);
+ gr_basic_block_vector_t calc_downstream_blocks(gr_basic_block_sptr block, int port);
+ gr_edge_vector_t calc_upstream_edges(gr_basic_block_sptr block);
+ bool has_block_p(gr_basic_block_sptr block);
+ gr_edge calc_upstream_edge(gr_basic_block_sptr block, int port);
+
+private:
+
+ void check_valid_port(gr_io_signature_sptr sig, int port);
+ void check_dst_not_used(const gr_endpoint &dst);
+ void check_type_match(const gr_endpoint &src, const gr_endpoint &dst);
+ gr_edge_vector_t calc_connections(gr_basic_block_sptr block, bool check_inputs); // false=use outputs
+ void check_contiguity(gr_basic_block_sptr block, const std::vector<int> &used_ports, bool check_inputs);
+
+ gr_basic_block_vector_t calc_downstream_blocks(gr_basic_block_sptr block);
+ gr_basic_block_vector_t calc_reachable_blocks(gr_basic_block_sptr block, gr_basic_block_vector_t &blocks);
+ void reachable_dfs_visit(gr_basic_block_sptr block, gr_basic_block_vector_t &blocks);
+ gr_basic_block_vector_t calc_adjacent_blocks(gr_basic_block_sptr block, gr_basic_block_vector_t &blocks);
+ gr_basic_block_vector_t sort_sources_first(gr_basic_block_vector_t &blocks);
+ bool source_p(gr_basic_block_sptr block);
+ void topological_dfs_visit(gr_basic_block_sptr block, gr_basic_block_vector_t &output);
+};
+
+// Convenience functions
+inline
+void gr_flowgraph::connect(gr_basic_block_sptr src_block, int src_port,
+ gr_basic_block_sptr dst_block, int dst_port)
+{
+ connect(gr_endpoint(src_block, src_port),
+ gr_endpoint(dst_block, dst_port));
+}
+
+inline
+void gr_flowgraph::disconnect(gr_basic_block_sptr src_block, int src_port,
+ gr_basic_block_sptr dst_block, int dst_port)
+{
+ disconnect(gr_endpoint(src_block, src_port),
+ gr_endpoint(dst_block, dst_port));
+}
+
+inline std::ostream&
+operator <<(std::ostream &os, const gr_endpoint endp)
+{
+ os << endp.block() << ":" << endp.port();
+ return os;
+}
+
+inline std::ostream&
+operator <<(std::ostream &os, const gr_edge edge)
+{
+ os << edge.src() << "->" << edge.dst();
+ return os;
+}
+
+#endif /* INCLUDED_GR_FLOWGRAPH_H */
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