Ruby  2.7.2p137(2020-10-01revision5445e0435260b449decf2ac16f9d09bae3cafe72)
return_dbl.c
Go to the documentation of this file.
1 /* Area: ffi_call
2  Purpose: Check return value double.
3  Limitations: none.
4  PR: none.
5  Originator: <andreast@gcc.gnu.org> 20050212 */
6 
7 /* { dg-do run } */
8 #include "ffitest.h"
9 
10 static double return_dbl(double dbl)
11 {
12  printf ("%f\n", dbl);
13  return 2 * dbl;
14 }
15 int main (void)
16 {
17  ffi_cif cif;
18  ffi_type *args[MAX_ARGS];
19  void *values[MAX_ARGS];
20  double dbl, rdbl;
21 
22  args[0] = &ffi_type_double;
23  values[0] = &dbl;
24 
25  /* Initialize the cif */
27  &ffi_type_double, args) == FFI_OK);
28 
29  for (dbl = -127.3; dbl < 127; dbl++)
30  {
31  ffi_call(&cif, FFI_FN(return_dbl), &rdbl, values);
32  printf ("%f vs %f\n", rdbl, return_dbl(dbl));
33  CHECK(rdbl == 2 * dbl);
34  }
35  exit(0);
36 }
main
int main(void)
Definition: return_dbl.c:15
ffitest.h
CHECK
#define CHECK(sub)
Definition: compile.c:448
FFI_DEFAULT_ABI
@ FFI_DEFAULT_ABI
Definition: ffitarget.h:38
ffi_prep_cif
ffi_status ffi_prep_cif(ffi_cif *cif, ffi_abi abi, unsigned int nargs, ffi_type *rtype, ffi_type **atypes)
Definition: prep_cif.c:226
MAX_ARGS
#define MAX_ARGS
Definition: function.c:15
exit
void exit(int __status) __attribute__((__noreturn__))
printf
int int int printf(const char *__restrict,...) __attribute__((__format__(__printf__
ffi_call
void ffi_call(ffi_cif *cif, void(*fn)(void), void *rvalue, void **avalue)
Definition: ffi.c:813