File: atomic-flag.c

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gcc-riscv64-unknown-elf 8.3.0.2019.08%2Bdfsg-1
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/* Test __atomic routines for existence and execution.  */
/* { dg-do run } */
/* { dg-require-effective-target sync_char_short } */

/* Test that __atomic_test_and_set and __atomic_clear builtins execute.  */

extern void abort(void);
unsigned char a;

int
main ()
{
  int b;

  __atomic_clear (&a, __ATOMIC_RELAXED);
  if (a != 0)
    abort ();

  b = __atomic_test_and_set (&a, __ATOMIC_SEQ_CST);
  if (a != __GCC_ATOMIC_TEST_AND_SET_TRUEVAL || b != 0)
    abort ();

  b = __atomic_test_and_set (&a, __ATOMIC_ACQ_REL);
  if (a != __GCC_ATOMIC_TEST_AND_SET_TRUEVAL || b != 1)
    abort ();

  __atomic_clear (&a, __ATOMIC_SEQ_CST);
  if (a != 0)
    abort ();

  return 0;
}