1 // 2 // Copyright (C) 2009 The Android Open Source Project 3 // 4 // Licensed under the Apache License, Version 2.0 (the "License"); 5 // you may not use this file except in compliance with the License. 6 // You may obtain a copy of the License at 7 // 8 // http://www.apache.org/licenses/LICENSE-2.0 9 // 10 // Unless required by applicable law or agreed to in writing, software 11 // distributed under the License is distributed on an "AS IS" BASIS, 12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 // See the License for the specific language governing permissions and 14 // limitations under the License. 15 // 16 17 #ifndef UPDATE_ENGINE_PAYLOAD_GENERATOR_GRAPH_UTILS_H_ 18 #define UPDATE_ENGINE_PAYLOAD_GENERATOR_GRAPH_UTILS_H_ 19 20 #include <vector> 21 22 #include <base/macros.h> 23 24 #include "update_engine/payload_generator/graph_types.h" 25 #include "update_engine/update_metadata.pb.h" 26 27 // A few utility functions for graphs 28 29 namespace chromeos_update_engine { 30 31 namespace graph_utils { 32 33 // Returns the number of blocks represented by all extents in the edge. 34 uint64_t EdgeWeight(const Graph& graph, const Edge& edge); 35 36 // These add a read-before dependency from graph[src] -> graph[dst]. If the dep 37 // already exists, the block/s is/are added to the existing edge. 38 void AddReadBeforeDep(Vertex* src, 39 Vertex::Index dst, 40 uint64_t block); 41 void AddReadBeforeDepExtents(Vertex* src, 42 Vertex::Index dst, 43 const std::vector<Extent>& extents); 44 45 void DropWriteBeforeDeps(Vertex::EdgeMap* edge_map); 46 47 // For each node N in graph, drop all edges N->|index|. 48 void DropIncomingEdgesTo(Graph* graph, Vertex::Index index); 49 50 void DumpGraph(const Graph& graph); 51 52 } // namespace graph_utils 53 54 } // namespace chromeos_update_engine 55 56 #endif // UPDATE_ENGINE_PAYLOAD_GENERATOR_GRAPH_UTILS_H_ 57
