1 /* Copyright (c) 2010-2018. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
9 #include "xbt/replay.hpp"
11 #include <boost/algorithm/string.hpp>
13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(replay,xbt,"Replay trace reader");
18 std::ifstream* action_fs = nullptr;
19 std::unordered_map<std::string, action_fun> action_funs;
20 static std::unordered_map<std::string, std::queue<ReplayAction*>*> action_queues;
22 static void read_and_trim_line(std::ifstream* fs, std::string* line)
25 std::getline(*fs, *line);
27 } while (not fs->eof() && (line->length() == 0 || line->front() == '#'));
28 XBT_DEBUG("got from trace: %s", line->c_str());
36 explicit ReplayReader(const char* filename)
38 XBT_VERB("Prepare to replay file '%s'", filename);
39 fs = new std::ifstream(filename, std::ifstream::in);
40 xbt_assert(fs->is_open(), "Cannot read replay file '%s'", filename);
42 ReplayReader(const ReplayReader&) = delete;
43 ReplayReader& operator=(const ReplayReader&) = delete;
48 bool get(ReplayAction* action);
51 bool ReplayReader::get(ReplayAction* action)
53 read_and_trim_line(fs, &line);
55 boost::split(*action, line, boost::is_any_of(" \t"), boost::token_compress_on);
59 static ReplayAction* get_action(char* name)
63 std::queue<ReplayAction*>* myqueue = nullptr;
64 if (action_queues.find(std::string(name)) != action_queues.end())
65 myqueue = action_queues.at(std::string(name));
66 if (myqueue == nullptr || myqueue->empty()) { // Nothing stored for me. Read the file further
67 // Read lines until I reach something for me (which breaks in loop body) or end of file reached
69 std::string action_line;
70 read_and_trim_line(action_fs, &action_line);
73 /* we cannot split in place here because we parse&store several lines for the colleagues... */
74 action = new ReplayAction();
75 boost::split(*action, action_line, boost::is_any_of(" \t"), boost::token_compress_on);
77 // if it's for me, I'm done
78 std::string evtname = action->front();
79 if (evtname.compare(name) == 0) {
82 // Else, I have to store it for the relevant colleague
83 std::queue<ReplayAction*>* otherqueue = nullptr;
84 auto act = action_queues.find(evtname);
85 if (act != action_queues.end()) {
86 otherqueue = act->second;
87 } else { // Damn. Create the queue of that guy
88 otherqueue = new std::queue<ReplayAction*>();
89 action_queues.insert({evtname, otherqueue});
91 otherqueue->push(action);
94 // end of file reached while searching in vain for more work
96 // Get something from my queue and return it
97 action = myqueue->front();
105 static void handle_action(ReplayAction& action)
107 XBT_DEBUG("%s replays a %s action", action.at(0).c_str(), action.at(1).c_str());
108 action_fun function = action_funs.at(action.at(1));
111 } catch (xbt_ex& e) {
113 xbt_die("Replay error:\n %s", e.what());
118 * \ingroup XBT_replay
119 * \brief function used internally to actually run the replay
121 int replay_runner(int argc, char* argv[])
123 if (simgrid::xbt::action_fs) { // A unique trace file
125 simgrid::xbt::ReplayAction* evt = simgrid::xbt::get_action(argv[0]);
128 simgrid::xbt::handle_action(*evt);
131 if (action_queues.find(std::string(argv[0])) != action_queues.end()) {
132 std::queue<ReplayAction*>* myqueue = action_queues.at(std::string(argv[0]));
134 action_queues.erase(std::string(argv[0]));
136 } else { // Should have got my trace file in argument
137 simgrid::xbt::ReplayAction evt;
138 xbt_assert(argc >= 2, "No '%s' agent function provided, no simulation-wide trace file provided, "
139 "and no process-wide trace file provided in deployment file. Aborting.",
141 simgrid::xbt::ReplayReader reader(argv[1]);
142 while (reader.get(&evt)) {
143 if (evt.front().compare(argv[0]) == 0) {
144 simgrid::xbt::handle_action(evt);
146 XBT_WARN("Ignore trace element not for me");
157 * \ingroup XBT_replay
158 * \brief Registers a function to handle a kind of action
160 * Registers a function to handle a kind of action
161 * This table is then used by \ref simgrid::xbt::replay_runner
163 * The argument of the function is the line describing the action, fields separated by spaces.
165 * \param action_name the reference name of the action.
166 * \param function prototype given by the type: void...(const char** action)
168 void xbt_replay_action_register(const char* action_name, action_fun function)
170 simgrid::xbt::action_funs[std::string(action_name)] = function;
174 * \ingroup XBT_replay
175 * \brief Get the function that was previously registered to handle a kind of action
177 * This can be useful if you want to override and extend an existing action.
179 action_fun xbt_replay_action_get(const char* action_name)
181 return simgrid::xbt::action_funs.at(std::string(action_name));