libffi/testsuite/libffi.call/struct2_win32.c

   1 /* Area:        ffi_call
   2    Purpose:     Check structures in fastcall/stdcall function
   3    Limitations: none.
   4    PR:          none.
   5    Originator:  From the original ffitest.c  */
   6
   7 /* { dg-do run { target i?86-*-cygwin* i?86-*-mingw* } } */
   8 #include "ffitest.h"
   9
  10 typedef struct
  11 {
  12   double d1;
  13   double d2;
  14 } test_structure_2;
  15
  16 static test_structure_2 __attribute__ ((fastcall)) struct2(test_structure_2 ts)
  17 {
  18   ts.d1--;
  19   ts.d2--;
  20
  21   return ts;
  22 }
  23
  24 int main (void)
  25 {
  26   ffi_cif cif;
  27   ffi_type *args[MAX_ARGS];
  28   void *values[MAX_ARGS];
  29   test_structure_2 ts2_arg;
  30   ffi_type ts2_type;
  31   ffi_type *ts2_type_elements[3];
  32   ts2_type.size = 0;
  33   ts2_type.alignment = 0;
  34   ts2_type.type = FFI_TYPE_STRUCT;
  35   ts2_type.elements = ts2_type_elements;
  36   ts2_type_elements[0] = &ffi_type_double;
  37   ts2_type_elements[1] = &ffi_type_double;
  38   ts2_type_elements[2] = NULL;
  39
  40
  41   /* This is a hack to get a properly aligned result buffer */
  42   test_structure_2 *ts2_result =
  43     (test_structure_2 *) malloc (sizeof(test_structure_2));
  44
  45   args[0] = &ts2_type;
  46   values[0] = &ts2_arg;
  47
  48   /* Initialize the cif */
  49   CHECK(ffi_prep_cif(&cif, FFI_FASTCALL, 1, &ts2_type, args) == FFI_OK);
  50
  51   ts2_arg.d1 = 5.55;
  52   ts2_arg.d2 = 6.66;
  53
  54   printf ("%g\n", ts2_arg.d1);
  55   printf ("%g\n", ts2_arg.d2);
  56
  57   ffi_call(&cif, FFI_FN(struct2), ts2_result, values);
  58
  59   printf ("%g\n", ts2_result->d1);
  60   printf ("%g\n", ts2_result->d2);
  61
  62   CHECK(ts2_result->d1 == 5.55 - 1);
  63   CHECK(ts2_result->d2 == 6.66 - 1);
  64
  65   free (ts2_result);
  66   exit(0);
  67 }