Ruby: ext/fiddle/libffi-3.2.1/testsuite/libffi.call/struct1.c Source File

Ruby 3.0.5p211 (2022-11-24 revision ba5cf0f7c52d4d35cc6a173c89eda98ceffa2dcf)

struct1.c
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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 char uc;
13 double d;
14 unsigned int ui;
15} test_structure_1;
16
17static test_structure_1 ABI_ATTR struct1(test_structure_1 ts)
18{
19 ts.uc++;
20 ts.d--;
21 ts.ui++;
22
23 return ts;
24}
25
26 int main (void)
27{
28 ffi_cif cif;
29 ffi_type *args[MAX_ARGS];
30 void *values[MAX_ARGS];
31 ffi_type ts1_type;
32 ffi_type *ts1_type_elements[4];
33
34 test_structure_1 ts1_arg;
35
36 /* This is a hack to get a properly aligned result buffer */
37 test_structure_1 *ts1_result =
38 (test_structure_1 *) malloc (sizeof(test_structure_1));
39
40 ts1_type.size = 0;
41 ts1_type.alignment = 0;
42 ts1_type.type = FFI_TYPE_STRUCT;
43 ts1_type.elements = ts1_type_elements;
44 ts1_type_elements[0] = &ffi_type_uchar;
45 ts1_type_elements[1] = &ffi_type_double;
46 ts1_type_elements[2] = &ffi_type_uint;
47 ts1_type_elements[3] = NULL;
48
49 args[0] = &ts1_type;
50 values[0] = &ts1_arg;
51
52 /* Initialize the cif */
53 CHECK(ffi_prep_cif(&cif, ABI_NUM, 1,
54 &ts1_type, args) == FFI_OK);
55
56 ts1_arg.uc = '\x01';
57 ts1_arg.d = 3.14159;
58 ts1_arg.ui = 555;
59
60 ffi_call(&cif, FFI_FN(struct1), ts1_result, values);
61
62 CHECK(ts1_result->ui == 556);
63 CHECK(ts1_result->d == 3.14159 - 1);
64
65 free (ts1_result);
66 exit(0);
67}
ffi_call
void ffi_call(ffi_cif *cif, void(*fn)(void), void *rvalue, void **avalue)
Definition: ffi.c:813
CHECK
#define CHECK(sub)
Definition: compile.c:429
free
#define free(x)
Definition: dln.c:52
ffitest.h
ABI_NUM
#define ABI_NUM
Definition: ffitest.h:35
ABI_ATTR
#define ABI_ATTR
Definition: ffitest.h:36
MAX_ARGS
#define MAX_ARGS
Definition: function.c:17
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
NULL
#define NULL
Definition: regenc.h:69
malloc
#define malloc
Definition: st.c:170
main
int main(void)
Definition: struct1.c:26
test_structure_1
Definition: struct1.c:11
test_structure_1::uc
unsigned char uc
Definition: struct1.c:12
test_structure_1::ui
unsigned int ui
Definition: struct1.c:14
test_structure_1::d
double d
Definition: struct1.c:13