test/core/support/tls_test.c

/*
 *
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/* Test of gpr thread local storage 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/tls.h>
#include "test/core/util/test_config.h"

#define NUM_THREADS 100

GPR_TLS_DECL(test_var);

static void thd_body(void *arg) {
  intptr_t i;

  GPR_ASSERT(gpr_tls_get(&test_var) == 0);

  for (i = 0; i < 10000000; i++) {
    gpr_tls_set(&test_var, i);
    GPR_ASSERT(gpr_tls_get(&test_var) == i);
  }
  gpr_tls_set(&test_var, 0);
}

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

int main(int argc, char *argv[]) {
  gpr_thd_options opt = gpr_thd_options_default();
  int i;
  gpr_thd_id threads[NUM_THREADS];

  grpc_test_init(argc, argv);

  gpr_tls_init(&test_var);

  gpr_thd_options_set_joinable(&opt);

  for (i = 0; i < NUM_THREADS; i++) {
    gpr_thd_new(&threads[i], thd_body, NULL, &opt);
  }
  for (i = 0; i < NUM_THREADS; i++) {
    gpr_thd_join(threads[i]);
  }

  gpr_tls_destroy(&test_var);

  return 0;
}