macros_stuff.c

#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <unistd.h>

#define TIMEOUT 1

#define EXIT_STATUS_SUCCESS 0
#define EXIT_STATUS_FAILED  1
#define EXIT_STATUS_TIMEOUT 2

static void timeout_func()
{
  printf("Child process ended by timeout.\n");
  exit(EXIT_STATUS_TIMEOUT);
}

static void set_timer(sighandler_t func, time_t value_sec)
{
  signal(SIGALRM, func);
  struct itimerval new_t;

  new_t.it_value.tv_sec = value_sec;
  new_t.it_value.tv_usec = 0;
  new_t.it_interval.tv_sec = 0;
  new_t.it_interval.tv_usec = 0;

  setitimer(ITIMER_REAL, &new_t, NULL);
}

#define RUN_IN_ANOTHER_PROCESS_WITH_TIMEOUT(func, timeout, exit_code) do { \
  pid_t pid = fork(); \
  if (pid == 0) { \
    set_timer(timeout_func, timeout); \
    if (func) { \
      exit(EXIT_STATUS_SUCCESS); \
    } \
    exit(EXIT_STATUS_FAILED); \
  } else if (pid == -1) { \
    printf("Unable to fork: %s!\n", strerror(errno)); \
  } else { \
    int status; \
    waitpid(pid, &status, 0); \
    exit_code = WEXITSTATUS(status); \
  } \
} while (false)

int some_function(const char* param, int other_param)
{
  printf("param: \"%s\", int is %x\n", param, other_param);
  return 1;
}

int other_func(int param)
{
  printf("param-pam-pam: %x\n", param);
  return 0;
}

int third_func()
{
  while (1)
  {

  }

  return 0;
}

int main(int argc, char const *argv[])
{
  int exit_code;
  RUN_IN_ANOTHER_PROCESS_WITH_TIMEOUT(some_function("Hello", 0x7357), TIMEOUT, exit_code);
  printf("process1 exited with %d.\n", exit_code);

  RUN_IN_ANOTHER_PROCESS_WITH_TIMEOUT(other_func(0x7537), TIMEOUT, exit_code);
  printf("process2 exited with %d.\n", exit_code);

  RUN_IN_ANOTHER_PROCESS_WITH_TIMEOUT(third_func(), TIMEOUT, exit_code);
  printf("process3 exited with %d.\n", exit_code);

  return 0;
}

// shell@S307:/data/local/tmp $ ./run
// param: "Hello", int is 7357
// process1 exited with 0.
// param-pam-pam: 7537
// process2 exited with 1.
// Child process ended by timeout.
// process3 exited with 2.
// shell@S307:/data/local/tmp $