github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libffi/testsuite/libffi.call/closure_simple.c (about)

     1  /* Area:	closure_call
     2     Purpose:	Check simple closure handling with all ABIs
     3     Limitations:	none.
     4     PR:		none.
     5     Originator:	<twalljava@dev.java.net> */
     6  
     7  /* { dg-do run } */
     8  #include "ffitest.h"
     9  
    10  static void
    11  closure_test(ffi_cif* cif __UNUSED__, void* resp, void** args, void* userdata)
    12  {
    13    *(ffi_arg*)resp =
    14      (int)*(int *)args[0] + (int)(*(int *)args[1])
    15      + (int)(*(int *)args[2])  + (int)(*(int *)args[3])
    16      + (int)(intptr_t)userdata;
    17  
    18    printf("%d %d %d %d: %d\n",
    19  	 (int)*(int *)args[0], (int)(*(int *)args[1]),
    20  	 (int)(*(int *)args[2]), (int)(*(int *)args[3]),
    21           (int)*(ffi_arg *)resp);
    22  
    23  }
    24  
    25  typedef int (ABI_ATTR *closure_test_type0)(int, int, int, int);
    26  
    27  int main (void)
    28  {
    29    ffi_cif cif;
    30    void *code;
    31    ffi_closure *pcl = ffi_closure_alloc(sizeof(ffi_closure), &code);
    32    ffi_type * cl_arg_types[17];
    33    int res;
    34  
    35    cl_arg_types[0] = &ffi_type_uint;
    36    cl_arg_types[1] = &ffi_type_uint;
    37    cl_arg_types[2] = &ffi_type_uint;
    38    cl_arg_types[3] = &ffi_type_uint;
    39    cl_arg_types[4] = NULL;
    40  
    41    /* Initialize the cif */
    42    CHECK(ffi_prep_cif(&cif, ABI_NUM, 4,
    43  		     &ffi_type_sint, cl_arg_types) == FFI_OK);
    44  
    45    CHECK(ffi_prep_closure_loc(pcl, &cif, closure_test,
    46                               (void *) 3 /* userdata */, code) == FFI_OK);
    47  
    48    res = (*(closure_test_type0)code)(0, 1, 2, 3);
    49    /* { dg-output "0 1 2 3: 9" } */
    50  
    51    printf("res: %d\n",res);
    52    /* { dg-output "\nres: 9" } */
    53  
    54    exit(0);
    55  }