start implementation actsim exec in worker

src/actsim_agent/worker.cpp

@@ -105,14 +105,79 @@ void Worker::thread_run() {
 }
 
 std::unique_ptr<OutputType> Worker::perform_task(std::unique_ptr<InputType>& task, bool& finished) {
-    usleep(10000000);
     std::cout << "[WORKER] Worker performed task. Please implement me!" << std::endl;
-    task->id;
     finished = true;
-    return std::make_unique<OutputType>();
 
+    if (task->get_content().size() != 1) {
+        std::cerr << "Error: Simulation configuration in worker thread has more than one testcases to run!" << std::endl;
+        finished = false;
+        return std::make_unique<OutputType>();
+    }
+
+    auto testcase = task->get_content().front();
+
+    // execv expects mutable char*, so we have to copy our stuff first
+    auto design = this->interface.get_design(task->design);
+    char *design_char = new char[design.length()+1];
+    std::strcpy(design_char, design.c_str());
+    
+    char *top_proc_char = new char[testcase.top.length() + 1];
+    std::strcpy(top_proc_char, testcase.top.c_str());
+    
+    auto commands = testcase.commands;
+
+    std::cout << "[WORKER] Here's the copied design string: " << design_char << std::endl;
+    std::cout << "[WORKER] Here's the copied top string: " << top_proc_char << std::endl;
+    usleep(10000000);
+
+    return std::make_unique<OutputType>();
     // wait for either the executing process to finish or 
     // for the condition variable indicating the process should be stopped
+    int stdin_pipe[2];
+    int stdout_pipe[2];
+    int stderr_pipe[2];
+
+    pipe(stdin_pipe);
+    pipe(stdout_pipe);
+    pipe(stderr_pipe);
+
+    // Time to have an identity crisis.
+    // I'd like to see this as one of those comic tropes; person gets split into
+    // a good and the bad self. Like the normal one and the evil clone.
+    // Which side are we? The normal or the evil clone?
+    if (!fork()) {
+        // Oh no, we're the evil clone!
+        // Just kidding, we're the child process
+
+        // redirect stdout, stdin, and stderr
+        dup2(stdin_pipe[0], STDIN_FILENO);
+        dup2(stdout_pipe[1], STDOUT_FILENO);
+        dup2(stderr_pipe[1], STDERR_FILENO);
+
+        // close all the initial file descriptors so actsim (which we're about to call)
+        // doesn't know what's going on
+        close(stdin_pipe[0]);
+        close(stdin_pipe[1]);
+        close(stdout_pipe[0]);
+        close(stdout_pipe[1]);
+        close(stderr_pipe[0]);
+        close(stderr_pipe[1]);
+
+        // build the execution vector
+        char* const argv[] = {"${ACT_HOME}/bin/actsim", design_char, top_proc_char};
+
+        // and call actsim
+        execv(argv[0], argv);
+
+        // we shouldn't land here
+
+    } else {
+        // stuff for the main process
+    }
+
+    delete design_char;
+    delete top_proc_char;
+
 }
 
 void Worker::run_actsim() {