libffi/testsuite/libffi.call/struct4.c

   1 /* Area:        ffi_call
   2    Purpose:     Check structures.
   3    Limitations: none.
   4    PR:          none.
   5    Originator:  From the original ffitest.c  */
   6
   7 /* { dg-do run } */
   8 #include "ffitest.h"
   9
  10 typedef struct
  11 {
  12   unsigned ui1;
  13   unsigned ui2;
  14   unsigned ui3;
  15 } test_structure_4;
  16
  17 static test_structure_4 struct4(test_structure_4 ts)
  18 {
  19   ts.ui3 = ts.ui1 * ts.ui2 * ts.ui3;
  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   ffi_type ts4_type;
  30   ffi_type *ts4_type_elements[4];
  31   ts4_type.size = 0;
  32   ts4_type.alignment = 0;
  33   ts4_type.type = FFI_TYPE_STRUCT;
  34   test_structure_4 ts4_arg;
  35   ts4_type.elements = ts4_type_elements;
  36   ts4_type_elements[0] = &ffi_type_uint;
  37   ts4_type_elements[1] = &ffi_type_uint;
  38   ts4_type_elements[2] = &ffi_type_uint;
  39   ts4_type_elements[3] = NULL;
  40
  41
  42   /* This is a hack to get a properly aligned result buffer */
  43   test_structure_4 *ts4_result =
  44     (test_structure_4 *) malloc (sizeof(test_structure_4));
  45
  46   args[0] = &ts4_type;
  47   values[0] = &ts4_arg;
  48
  49   /* Initialize the cif */
  50   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1, &ts4_type, args) == FFI_OK);
  51
  52   ts4_arg.ui1 = 2;
  53   ts4_arg.ui2 = 3;
  54   ts4_arg.ui3 = 4;
  55
  56   ffi_call (&cif, FFI_FN(struct4), ts4_result, values);
  57
  58   CHECK(ts4_result->ui3 == 2U * 3U * 4U);
  59
  60
  61   free (ts4_result);
  62   exit(0);
  63 }