Simple threaded concept for clib-install(1)

install-with-threads.c

#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <string.h>

/**
 * Work structure.
 */

typedef struct {
  int id;
  char *slug;
  int rc;
} install_work_t;

/**
 * Simple wrapper around `install_package`.
 */

static void *
install_package_worker(void *data) {
  install_work_t *work = (install_work_t *) data;
  // actually do the installation here:
  // work->rc = install_package(work->slug);
  work->rc = 0;
  pthread_exit(work);
}

/**
 * Entry point.
 */

int
main(void) {
  pthread_t threads[2];
  install_work_t workers[2];

  // get packages from args
  char *packages[2] = {
      "stephenmathieson/case.c"
    , "stephenmathieson/trim.c"
  };

  // spawn threads
  for (int i = 0; i < 2; i++) {
    workers[i].id = i;
    workers[i].slug = packages[i];

    int rc = pthread_create(&threads[i]
      , NULL
      , install_package_worker
      , (void *) &workers[i]);

    if (0 != rc) {
      fprintf(stderr, "Failed to create thread #%d (%s)\n", i, packages[i]);
      exit(1);
    }
  }

  // get thread status
  for (int i = 0; i < 2; i++) {
    void *status = NULL;
    install_work_t *work = NULL;

    pthread_join(threads[i], &status);
    work = (install_work_t *) status;

    if (0 == work->rc) {
      printf("%s installed!\n", work->slug);
    } else {
      fprintf(stderr, "Failed to install %s\n", work->slug);
    }
  }

  return 0;
}