6663b6c9
 adorian
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// -*- mode:C++ ; compile-command: "g++ -I.. -I../include -g xcasctrl.cc -o xcasctrl" -*-
/*
* Copyright (C) 2005 B. Parisse, Institut Fourier, 38402 St Martin d'Heres
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
using namespace std;
#include <string>
#include <stdexcept>
#include <fstream>
#include <iostream>
#include <iomanip>
#include <time.h>
#include <sys/time.h>
//#include <unistd.h> // For reading arguments from file
#include <fcntl.h>
#include <cstdlib>
#include <signal.h>
volatile bool child_busy=false;
volatile bool data_ready=false;
void data_signal_handler(int signum){
child_busy=false;
data_ready=true;
}
// Test xcasce by calling factor(x^4-1)
int main(int ARGC, char *ARGV[]){
sigset_t mask, oldmask;
sigemptyset (&mask);
sigaddset (&mask, SIGUSR1);
signal(SIGUSR1,data_signal_handler);
pid_t child_id=fork();
if (child_id<(pid_t) 0)
cerr << "Make_child error: Unable to fork";
if (!child_id){ // child process, call xcasce
execvp("/home/parisse/src/xcasce",ARGV);
return 1;
}
usleep(1000000); // Wait for child process to be loaded
// Parent process, loop read entry, signal child_id,
// Get question
string s("factor(x^4-1)");
if (s=="quit"){
kill(child_id,SIGKILL);
return 0;
}
s += '\n';
ofstream in("Cas.txt");
in << getpid() << endl;
in << s << endl;
data_ready=false;
child_busy=true;
// Evaluate
sigprocmask (SIG_BLOCK, &mask, &oldmask);
kill(child_id,SIGUSR1);
while (!data_ready)
sigsuspend (&oldmask);
sigprocmask (SIG_UNBLOCK, &mask, NULL);
// Print result
FILE * f =fopen("Out.txt","r");
while (!feof(f)){
char ch=fgetc(f);
cout << ch ;
}
fclose(f);
kill(child_id,SIGKILL);
return 0;
}
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