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wait for all child processes to finish c++

Mayura Sandakalum answered on October 24, 2022 Popularity 4/10 Helpfulness 1/10

answer wait for all child processes to finish c++

wait for all child processes to finish c++

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#include <sys/types.h>
#include <sys/wait.h>
#include <cstdlib>
#include <iostream>
#include <unistd.h>
using namespace std;

int main(){
  int pid,i,numOfProcess(10);

  for(i=0; i<numOfProcess; i++){
    pid = fork();    // <-------- You had a == not = 
    if(pid == -1){   // <-------- You didn't have a open {, close }
        //error handling
    }
    else if(pid == 0){
        //child, do something
        cout << "Child " << i << " sleeping(" << i << ")" << endl;
        sleep(i);
        exit(0);
    }
    else{ //parent
        //i want to wait till all children are done before continue..how?
        //i tried wait(NULL), and waitpid(pid, NULL, 0)
        //but both wont work..?
      cout << "Started proc(" << i << ")" << endl;
    //...........
    //something done in parent
    }
  }
  cout << "Waiting" << endl;
  // Need to wait for all
  for(i=0; i<numOfProcess; i++){
    wait(NULL);
    cout << "Got " << i+1 << " done" << endl;
  }
  return 0;  
}

Popularity 4/10 Helpfulness 1/10 Language cpp

Source: www.daniweb.com

Tags: c++ wait

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Contributed on Oct 24 2022

Mayura Sandakalum

0 Answers Avg Quality 2/10

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wait for all child processes to finish c++

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