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 #ifndef USING_MMAP
  24   static ffi_closure cl;
  25 #endif
  26   ffi_closure *pcl;
  27   ffi_type * cl_arg_types[2];
  28   double res;
  29
  30 #ifdef USING_MMAP
  31   pcl = allocate_mmap (sizeof(ffi_closure));
  32 #else
  33   pcl = &cl;
  34 #endif
  35
  36   cl_arg_types[0] = &ffi_type_double;
  37   cl_arg_types[1] = NULL;
  38
  39   /* Initialize the cif */
  40   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1,
  41                      &ffi_type_double, cl_arg_types) == FFI_OK);
  42
  43   CHECK(ffi_prep_closure(pcl, &cif, cls_ret_double_fn, NULL)  == FFI_OK);
  44
  45   res = (*((cls_ret_double)pcl))(21474.789);
  46   /* { dg-output "21474.789000: 21474.789000" } */
  47   printf("res: %.6f\n", res);
  48   /* { dg-output "\nres: 21474.789000" } */
  49
  50   exit(0);
  51 }