Concurrency and Source Panels

Client and Worker Files

Replay one C++ execution that builds a request in the client file, calls a worker helper in another translation unit, and returns response data.

panels Each source file has its own panel because both files participate in the same execution trace. The Variables panel follows the call from the client file into the worker file and then back to the caller.
boundary The client file owns the entry point and visible output. The worker file owns the routing rule that turns each command into a route and response body.

Project Entry

command
request_client.cpp
Replay: real traced execution (multi-file project)
#include <iostream>
#include <string>
#include <utility>

std::pair<std::string, std::string> handleRequest(const std::string& command);

int main() {
    std::string command = "status";
    std::string user = "reader";
    auto response = handleRequest(command);

    std::cout << "send=" << command << std::endl;
    std::cout << "route=" << response.first << std::endl;
    std::cout << "body=" << response.second << std::endl;
    std::cout << "user=" << user << std::endl;
    return 0;
}

#include <iostream>
#include <string>
#include <utility>

std::pair<std::string, std::string> handleRequest(const std::string& command);

int main() {
    std::string command = "ping";
    std::string user = "reader";
    auto response = handleRequest(command);

    std::cout << "send=" << command << std::endl;
    std::cout << "route=" << response.first << std::endl;
    std::cout << "body=" << response.second << std::endl;
    std::cout << "user=" << user << std::endl;
    return 0;
}

#include <iostream>
#include <string>
#include <utility>

std::pair<std::string, std::string> handleRequest(const std::string& command);

int main() {
    std::string command = "count";
    std::string user = "reader";
    auto response = handleRequest(command);

    std::cout << "send=" << command << std::endl;
    std::cout << "route=" << response.first << std::endl;
    std::cout << "body=" << response.second << std::endl;
    std::cout << "user=" << user << std::endl;
    return 0;
}

  1. command ← status, user ← reader

    7int main() {8    std::string command→ status = "status"; //@command="ping", "count"9    std::string user→ reader = "reader";10    auto response = handleRequest(commandstatus);

  2. route ← /health, body ← ready

    3#include <utility>45std::pair<std::string, std::string> handleRequest(const std::string& command);67int main() {8    std::string command = "status"; //@command="ping", "count"9    std::string user = "reader";10    auto response = handleRequest(command);1112    std::cout << "send=" << command << std::endl;13    std::cout << "route=" << response.first << std::endl;14    std::cout << "body=" << response.second << std::endl;15    std::cout << "user=" << user << std::endl;
    values this step/healthroutereadybodystatuscommand

  3. response ← (empty)

    9    std::string user = "reader";10    auto response→ (empty) = handleRequest(commandstatus);1112    std::cout << "send=" << commandstatus << std::endl;13    std::cout << "route=" << response(empty).first << std::endl;14    std::cout << "body=" << response(empty).second << std::endl;15    std::cout << "user=" << userreader << std::endl;16    return 0;17}
    outputsend=status
route=/health
body=ready
user=reader