libffi/testsuite/libffi.call/cls_schar.c

   1 /* Area:        closure_call
   2    Purpose:     Check return value schar.
   3    Limitations: none.
   4    PR:          none.
   5    Originator:  <andreast@gcc.gnu.org> 20031108  */
   6
   7
   8
   9 /* { dg-do run } */
  10 #include "ffitest.h"
  11
  12 static void cls_ret_schar_fn(ffi_cif* cif __UNUSED__, void* resp, void** args,
  13                              void* userdata __UNUSED__)
  14 {
  15   *(ffi_arg*)resp = *(signed char *)args[0];
  16   printf("%d: %d\n",*(signed char *)args[0],
  17          (int)*(ffi_arg *)(resp));
  18 }
  19 typedef signed char (*cls_ret_schar)(signed char);
  20
  21 int main (void)
  22 {
  23   ffi_cif cif;
  24   void *code;
  25   ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
  26   ffi_type * cl_arg_types[2];
  27   signed char res;
  28
  29   cl_arg_types[0] = &ffi_type_schar;
  30   cl_arg_types[1] = NULL;
  31
  32   /* Initialize the cif */
  33   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1,
  34                      &ffi_type_schar, cl_arg_types) == FFI_OK);
  35
  36   CHECK(ffi_prep_closure_loc(pcl, &cif, cls_ret_schar_fn, NULL, code)  == FFI_OK);
  37
  38   res = (*((cls_ret_schar)code))(127);
  39   /* { dg-output "127: 127" } */
  40   printf("res: %d\n", res);
  41   /* { dg-output "\nres: 127" } */
  42
  43   exit(0);
  44 }