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further the sensors example to load and parse files

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This commit is contained in:
Jason Turner
2009-06-20 23:24:06 +00:00
parent 0a7d7958ab
commit 9f13858482
3 changed files with 104 additions and 10 deletions
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37
chaiscript/sensors.cpp
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@@ -5,6 +5,38 @@
#include <boost/function.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>
std::string load_text_file(const std::string &filename)
{
std::ifstream infile(filename.c_str());
std::string str;
std::string result;
while (std::getline(infile, str))
{
result += str + "\n";
}
return result;
}
std::vector<dispatchkit::Boxed_Value> regex_search(const std::string &str, const std::string &regex)
{
boost::smatch matches;
boost::regex_search(str, matches, boost::regex(regex));
std::vector<dispatchkit::Boxed_Value> results;
for (unsigned int i = 0; i < matches.size(); ++i)
{
results.push_back(dispatchkit::Boxed_Value(std::string(matches.str(i))));
}
return results;
}
struct Sensor_Manager
{
struct Sensor
@@ -76,7 +108,12 @@ int main(int argc, char *argv[]) {
Sensor_Manager sensor_manager;
chai.get_eval_engine().add_object("sensor_manager", boost::ref(sensor_manager));
dispatchkit::register_function(chai.get_eval_engine(), &Sensor_Manager::add_sensor, "add_sensor");
dispatchkit::register_function(chai.get_eval_engine(), &regex_search, "regex_search");
dispatchkit::register_function(chai.get_eval_engine(), &load_text_file, "load_text_file");
for (int i = 1; i < argc; ++i) {
try {

5
dispatchkit/boxed_value.hpp
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@@ -347,6 +347,11 @@ namespace dispatchkit
Boxed_POD_Value(const Boxed_Value &v)
: d(0), i(0), m_isfloat(false)
{
if (!v.get_type_info().m_type_info)
{
throw boost::bad_any_cast();
}
const std::type_info &inp_ = *v.get_type_info().m_type_info;
if (inp_ == typeid(double))

72
samples/sensors.chai
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@@ -1,14 +1,66 @@
def initialize_cpu_sensor(state, cpuname, sensor_manager)
{
state[cpuname] = 0.0;
state[cpuname + ".user"] = 0.0;
state[cpuname + ".nice"] = 0.0;
state[cpuname + ".system"] = 0.0;
state[cpuname + ".idle"] = 0.0;
state[cpuname + ".iowait"] = 0.0;
state[cpuname + ".irq"] = 0.0;
state[cpuname + ".softirq"] = 0.0;
}
def update_cpu_state(state, statfile, cpuname)
{
var regex = cpuname + "\s+([0-9]+)\s+([0-9]+)\s+([0-9]+)\s+([0-9]+)\s+([0-9]+)\s+([0-9]+)\s+([0-9]+)";
var strs = regex_search(statfile, regex);
var user = to_double(strs[1]);
var nice = to_double(strs[2]);
var system = to_double(strs[3]);
var idle = to_double(strs[4]);
var iowait = to_double(strs[5]);
var irq = to_double(strs[6]);
var softirq = to_double(strs[7]);
var userd = user - state[cpuname + ".user"];
var niced = nice - state[cpuname + ".nice"];
var systemd = system - state[cpuname + ".system"];
var idled = idle - state[cpuname + ".idle"];
var iowaitd = iowait - state[cpuname + ".iowait"];
var irqd = irq - state[cpuname + ".irq"];
var softirqd = softirq - state[cpuname + ".softirq"];
var totalticks = userd + niced + systemd + idled + iowaitd + irqd + softirqd;
state[cpuname] = (totalticks - idled) / totalticks
state[cpuname + ".user"] = user;
state[cpuname + ".nice"] = nice;
state[cpuname + ".system"] = system;
state[cpuname + ".idle"] = idle;
state[cpuname + ".iowait"] = iowait;
state[cpuname + ".irq"] = irq;
state[cpuname + ".softirq"] = softirq;
}
def update_state(state)
{
var file = load_text_file("/proc/stat");
update_cpu_state(state, file, "cpu");
update_cpu_state(state, file, "cpu0");
update_cpu_state(state, file, "cpu1");
}
var global_state = Map()
initialize_cpu_sensor(global_state, "cpu", sensor_manager);
initialize_cpu_sensor(global_state, "cpu0", sensor_manager);
initialize_cpu_sensor(global_state, "cpu1", sensor_manager);
sensor_manager.add_sensor("cpu", 500, global_state, function(state) { update_state(state); state["cpu"]; } )
sensor_manager.add_sensor("cpu0", 500, global_state, function(state) { state["cpu0"]; } )
sensor_manager.add_sensor("cpu1", 500, global_state, function(state) { state["cpu1"]; } )
global_state["CPU"] = 0.0;
global_state["CPU0"] = 0.0;
def update_state(state, name)
{
++state[name];
}
sensor_manager.add_sensor("CPU", 1000, global_state, function(state) { update_state(state, "CPU"); state["CPU"]; } )
sensor_manager.add_sensor("CPU0", 1000, global_state, function(state) { update_state(state, "CPU0"); state["CPU0"]; } )