test/core/support/thd_test.c

/*
 *
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 *
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/* Test of gpr thread support. */

#include <stdio.h>
#include <stdlib.h>
#include <grpc/support/log.h>
#include <grpc/support/sync.h>
#include <grpc/support/thd.h>
#include <grpc/support/time.h>
#include "test/core/util/test_config.h"

struct test {
  gpr_mu mu;
  int n;
  int is_done;
  gpr_cv done_cv;
};

/* A Thread body.   Decrement t->n, and if is becomes zero, set t->done. */
static void thd_body(void *v) {
  struct test *t = v;
  gpr_mu_lock(&t->mu);
  t->n--;
  if (t->n == 0) {
    t->is_done = 1;
    gpr_cv_signal(&t->done_cv);
  }
  gpr_mu_unlock(&t->mu);
}

/* Test that we can create a number of threads and wait for them. */
static void test(void) {
  int i;
  gpr_thd_id thd;
  struct test t;
  int n = 1000;
  gpr_mu_init(&t.mu);
  gpr_cv_init(&t.done_cv);
  t.n = n;
  t.is_done = 0;
  for (i = 0; i != n; i++) {
    GPR_ASSERT(gpr_thd_new(&thd, &thd_body, &t, NULL));
  }
  gpr_mu_lock(&t.mu);
  while (!t.is_done) {
    gpr_cv_wait(&t.done_cv, &t.mu, gpr_inf_future);
  }
  gpr_mu_unlock(&t.mu);
  GPR_ASSERT(t.n == 0);
}

/* ------------------------------------------------- */

int main(int argc, char *argv[]) {
  grpc_test_init(argc, argv);
  test();
  return 0;
}