1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
val () = print "libm2 starting up\n"
val () = OS.Process.atExit
(fn () => (_import "m1_close" public : unit -> unit; ()
; print "libm2 exits\n"))
(* Prepare libm1 *)
val () = _import "m1_open" public : int * string vector -> unit;
(1, Vector.fromList ["libm1"])
type p = MLton.Pointer.t
type 'a s = (unit -> 'a) * ('a -> unit)
val (_, setSI) = _symbol "libm2smlSymPrivate" alloc private : p s;
val (_, setSB) = _symbol "libm2smlSymPublic" alloc public : p s;
val (_, setCI) = _symbol "libm2cSymPrivate" private : p s;
val (_, setCB) = _symbol "libm2cSymPublic" public : p s;
type i = (unit -> p)
type e = i -> unit
val () = _export "libm2smlFnPrivate" private : e;
(fn () => _address "libm2smlSymPrivate" private : p;)
val () = _export "libm2smlFnPublic" public : e;
(fn () => _address "libm2smlSymPublic" public : p;)
val getCI = _import "libm2cFnPrivate" private : i;
val getCB = _import "libm2cFnPublic" public : i;
(* Store our idea of what the function pointers are in symbols *)
val () = setSI (_address "libm2smlFnPrivate" private : p;)
val () = setSB (_address "libm2smlFnPublic" public : p;)
val () = setCI (_address "libm2cFnPrivate" private : p;)
val () = setCB (_address "libm2cFnPublic" public : p;)
(* Have C confirm that it sees the same function pointers we do.
* C will check the values of the variables against it's own pointers.
* C also checks SML functions return his idea of pointers to our exports.
*)
val () = _import "libm2confirmC" private : unit -> unit; ()
(* Confirm that C functions return pointers to address as we expect. *)
fun check (s, b) = if b then () else print (s ^ " pointers don't match!\n")
val () = check ("libm2cFnPrivate", getCI () = _address "libm2cSymPrivate" private : p;)
val () = check ("libm2cFnPublic", getCB () = _address "libm2cSymPublic" public : p;)
(* Test symbols in libm1 *)
val (SB, _) = _symbol "libm1smlSymPublic" public : p s;
val (CB, _) = _symbol "libm1cSymPublic" public : p s;
val getSB = _import "libm1smlFnPublic" public : i;
val getCB = _import "libm1cFnPublic" public : i;
(* Check function pointers *)
val () = check ("libm1smlFnPublic", SB () = _address "libm1smlFnPublic" public : p;)
val () = check ("libm1cFnPublic", CB () = _address "libm1cFnPublic" public : p;)
(* Check symbol pointers *)
val () = check ("libm1smlSymPublic", getSB () = _address "libm1smlSymPublic" public : p;)
val () = check ("libm1cSymPublic", getCB () = _address "libm1cSymPublic" public : p;)
val () = print "m2 pointer test complete.\n"
|
