File: main.cpp

package info (click to toggle)
swiftlang 6.0.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 2,519,992 kB
  • sloc: cpp: 9,107,863; ansic: 2,040,022; asm: 1,135,751; python: 296,500; objc: 82,456; f90: 60,502; lisp: 34,951; pascal: 19,946; sh: 18,133; perl: 7,482; ml: 4,937; javascript: 4,117; makefile: 3,840; awk: 3,535; xml: 914; fortran: 619; cs: 573; ruby: 573
file content (29 lines) | stat: -rw-r--r-- 787 bytes parent folder | download | duplicates (10) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
 
#include <cassert>
#include <chrono>
#include <cstdlib>
#include <sys/wait.h>
#include <thread>
#include <unistd.h>

int main() {
  pid_t fork_result = fork(); // break here
  assert(fork_result >= 0);
  if (fork_result == 0) {
    // child
    _exit(47);
  }
  // parent
  // Use polling to avoid blocking if the child is not actually resumed.
  auto deadline = std::chrono::steady_clock::now() + std::chrono::seconds(10);
  std::chrono::milliseconds poll_interval{10};
  while (std::chrono::steady_clock::now() < deadline) {
    int status;
    pid_t waitpid_result = waitpid(fork_result, &status, WNOHANG);
    if (waitpid_result == fork_result)
      return 0;
    assert(waitpid_result == 0);
    std::this_thread::sleep_for(poll_interval);
    poll_interval *= 2;
  }
  abort();
}