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 #ifndef USING_MMAP
  25   static ffi_closure cl;
  26 #endif
  27   ffi_closure *pcl;
  28   ffi_type * cl_arg_types[2];
  29   signed char res;
  30
  31 #ifdef USING_MMAP
  32   pcl = allocate_mmap (sizeof(ffi_closure));
  33 #else
  34   pcl = &cl;
  35 #endif
  36
  37   cl_arg_types[0] = &ffi_type_schar;
  38   cl_arg_types[1] = NULL;
  39
  40   /* Initialize the cif */
  41   CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1,
  42                      &ffi_type_schar, cl_arg_types) == FFI_OK);
  43
  44   CHECK(ffi_prep_closure(pcl, &cif, cls_ret_schar_fn, NULL)  == FFI_OK);
  45
  46   res = (*((cls_ret_schar)pcl))(127);
  47   /* { dg-output "127: 127" } */
  48   printf("res: %d\n", res);
  49   /* { dg-output "\nres: 127" } */
  50
  51   exit(0);
  52 }