libffi/testsuite/libffi.call/cls_double.c

   1 /* Area:        closure_call
   2    Purpose:     Check return value double.
   3    Limitations: none.
   4    PR:          none.
   5    Originator:  <andreast@gcc.gnu.org> 20030828  */
   6
   7 /* { dg-do run } */
   8 #include "ffitest.h"
   9
  10 static void cls_ret_double_fn(ffi_cif* cif __UNUSED__, void* resp, void** args,
  11                               void* userdata __UNUSED__)
  12  {
  13    *(double *)resp = *(double *)args[0];
  14
  15    printf("%f: %f\n",*(double *)args[0],
  16           *(double *)resp);
  17  }
  18 typedef double (*cls_ret_double)(double);
  19
  20 int main (void)
  21 {
  22   ffi_cif cif;
  23   void *code;
  24   ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
  25   ffi_type * cl_arg_types[2];
  26   double res;
  27
  28   cl_arg_types[0] = &ffi_type_double;
  29   cl_arg_types[1] = NULL;
  30
  31   /* Initialize the cif */
  32   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1,
  33                      &ffi_type_double, cl_arg_types) == FFI_OK);
  34
  35   CHECK(ffi_prep_closure_loc(pcl, &cif, cls_ret_double_fn, NULL, code)  == FFI_OK);
  36
  37   res = (*((cls_ret_double)code))(21474.789);
  38   /* { dg-output "21474.789000: 21474.789000" } */
  39   printf("res: %.6f\n", res);
  40   /* { dg-output "\nres: 21474.789000" } */
  41
  42   exit(0);
  43 }