Source file netsys_win32.ml
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open Netsys_types
open Printf
external fill_random : Bytes.t -> unit = "netsys_fill_random"
external get_full_path_name : string -> string = "netsys_get_full_path_name"
external get_long_path_name : string -> string = "netsys_get_long_path_name"
type c_event
type c_pipe_helper
type i_event = c_event
type w32_event = i_event * Unix.file_descr
type pipe_mode = Pipe_in | Pipe_out | Pipe_duplex
type i_pipe =
{ pipe_name : string;
pipe_mode : pipe_mode;
pipe_helper : c_pipe_helper;
32_event option; *)
pipe_rd_event : w32_event;
pipe_wr_event : w32_event;
}
type w32_pipe = i_pipe * Unix.file_descr
type i_pipe_server =
{ psrv_name : string;
psrv_mode : pipe_mode;
psrv_max : int;
mutable psrv_first : bool;
mutable psrv_queue : c_pipe_helper list;
ing for an incoming connection *)
mutable psrv_listen : int;
psrv_ready : c_pipe_helper Queue.t;
t not yet reported connections *)
psrv_cn_event : w32_event;
psrv_proxy_handle : c_event;
psrv_mutex : Netsys_oothr.mutex;
}
terpart for the pipe server (no c_pipe_server),
the question is how to ensure that the proxy descriptor is closed.
For that reason we allocate an event (psrv_proxy_handle) and use
this event as proxy descriptor. For events there is the possibility
to let the C part of the module close the descriptor.
*)
type w32_pipe_server = i_pipe_server * Unix.file_descr
criptor is the proxy descriptor *)
type pipe_conn_state = Pipe_deaf | Pipe_listening | Pipe_connected | Pipe_down
type c_process
type i_process = c_process
type w32_process = i_process * Unix.file_descr
type i_input_thread =
{ ithr_descr : Unix.file_descr;
he thread by setting ithr_cmd, and signaling
ithr_cmd_cond:
*)
ithr_cmd_cond : Netsys_oothr.condition;
ithr_cmd_mutex : Netsys_oothr.mutex;
mutable ithr_cmd : [ `Read | `Cancel ] option;
mutable ithr_cancel_cmd : bool; `Cancel *)
ithr_event : w32_event;
ithr_buffer : Bytes.t;
mutable ithr_buffer_start : int;
mutable ithr_buffer_len : int;
mutable ithr_buffer_cond : [ `Cancelled | `EOF | `Exception of exn | `Data ];
mutable ithr_thread : int32;
ithr_read_mutex : Netsys_oothr.mutex;
mutable ithr_running : bool;
ithr_proxy_handle : c_event;
}
type w32_input_thread = i_input_thread * Unix.file_descr * < >
he descriptor is the proxy descriptor *)
type i_output_thread =
{ othr_descr : Unix.file_descr;
othr_cmd_cond : Netsys_oothr.condition;
othr_cmd_mutex : Netsys_oothr.mutex;
mutable othr_cmd : [ `Write | `Close | `Cancel ] option;
mutable othr_cancel_cmd : bool;
othr_event : w32_event;
othr_buffer : Bytes.t;
mutable othr_buffer_len : int;
mutable othr_write_cond : [ `Cancelled | `Exception of exn ] option;
mutable othr_thread : int32;
othr_write_mutex : Netsys_oothr.mutex;
mutable othr_running : bool;
othr_proxy_handle : c_event;
}
type w32_output_thread = i_output_thread * Unix.file_descr * < >
he descriptor is the proxy descriptor *)
type i_object =
| I_event of i_event
| I_pipe of i_pipe
| I_pipe_server of i_pipe_server
| I_process of i_process
| I_input_thread of i_input_thread * < >
| I_output_thread of i_output_thread * < >
type w32_object =
| W32_event of w32_event
| W32_pipe of w32_pipe
| W32_pipe_server of w32_pipe_server
| W32_process of w32_process
| W32_input_thread of w32_input_thread
| W32_output_thread of w32_output_thread
type create_process_option =
| CP_change_directory of string
| CP_set_env of string
| CP_std_handles of Unix.file_descr * Unix.file_descr * Unix.file_descr
| CP_create_console
| CP_detach_from_console
| CP_inherit_console
| CP_inherit_or_create_console
| CP_unicode_environment
| CP_ansi_environment
| CP_new_process_group
| CP_inherit_process_group
module Int64Map = Map.Make(Int64)
external int64_of_file_descr : Unix.file_descr -> int64
= "netsys_int64_of_file_descr"
external netsys_win32_set_debug : bool -> unit
= "netsys_win32_set_debug"
module Debug = struct
let enable = ref false
let debug_c_wrapper = netsys_win32_set_debug
end
let dlog = Netlog.Debug.mk_dlog "Netsys_win32" Debug.enable
let dlogr = Netlog.Debug.mk_dlogr "Netsys_win32" Debug.enable
let () =
Netlog.Debug.register_module "Netsys_win32" Debug.enable
module FD = struct
type t = int64
let equal (fd1) (fd2) =
fd1=fd2
let hash fd =
Hashtbl.hash fd
end
module H = Hashtbl.Make(FD)
let proxies = ref (H.create 41)
let proxies_mutex = !Netsys_oothr.provider # create_mutex()
let proxies_gc_flag = ref false
let proxies_unreg_count = ref 0
let mk_weak x =
let w = Weak.create 1 in
Weak.set w 0 (Some x);
w
let get_weak w =
Weak.get w 0
let finalise_proxy cell _ =
proxies_unreg_count := !proxies_unreg_count + 1;
cell := None
let gc_proxy() =
Walk through the table and check. We have to take care that the
order of the bindings for the same key is preserved, i.e. the most
recent use of a descriptor number needs to be the visible binding
in the table.
*)
let proxies' = H.create 41 in
let n_old = ref 0 in
let n_new = ref 0 in
H.iter
(fun fd_num entries ->
let m = ref [] in
List.iter
(fun entry ->
incr n_old;
let (_, cell) = entry in
if !cell <> None then (
incr n_new;
m := entry :: !m
)
)
entries;
H.add proxies' fd_num (List.rev !m)
)
!proxies;
proxies := proxies';
proxies_unreg_count := 0;
proxies_gc_flag := false;
dlogr
(fun () ->
sprintf "register_proxy: keeping %d/%d entries in proxy tbl"
!n_new !n_old;
);
dlogr
(fun () ->
let b = Buffer.create 500 in
Buffer.add_string b "\n";
H.iter
(fun fd_num entries ->
List.iter
(fun (_,cell) ->
bprintf b " - proxy tbl %Ld -> %s\n"
fd_num
( match !cell with
| None -> "<free>"
| Some(I_event _) -> "I_event"
| Some(I_pipe _) -> "I_pipe"
| Some(I_pipe_server _) -> "I_pipe_server"
| Some(I_process _) -> "I_process"
| Some(I_input_thread _) -> "I_input_thread"
| Some(I_output_thread _) -> "I_output_thread"
)
)
entries
)
proxies';
Buffer.contents b
)
let register_proxy fd i_obj =
let fd_num = int64_of_file_descr fd in
Netsys_oothr.serialize
proxies_mutex
(fun () ->
if (!proxies_gc_flag &&
2 * !proxies_unreg_count > H.length !proxies)
then (
gc_proxy()
);
let cell = ref (Some i_obj) in
let fd_weak = mk_weak fd in
let l = try H.find !proxies fd_num with Not_found -> [] in
H.replace !proxies fd_num ((fd_weak, cell) :: l);
Gc.finalise (finalise_proxy cell) fd
)
()
let unregister fd =
let fd_num = int64_of_file_descr fd in
Netsys_oothr.serialize
proxies_mutex
(fun () ->
let l = try H.find !proxies fd_num with Not_found -> [] in
let l' =
List.filter
(fun (fd'_weak,cell) ->
match get_weak fd'_weak with
| None -> false
| Some fd' ->
!cell <> None && fd != fd'
)
l in
H.replace !proxies fd_num l'
)
()
let _ =
Gc.create_alarm
(fun () ->
proxies_gc_flag := true
)
let lookup fd =
let fd_num = int64_of_file_descr fd in
Netsys_oothr.serialize
proxies_mutex
(fun () ->
let l = H.find !proxies fd_num in
let (_, cell_opt) =
List.find
(fun (fd'_weak,cell) ->
match get_weak fd'_weak with
| None -> false
| Some fd' ->
!cell <> None && fd == fd'
)
l in
match !cell_opt with
| None ->
assert false
| Some i_obj ->
( match i_obj with
| I_event i_ev ->
W32_event(i_ev, fd)
| I_pipe i_pipe ->
W32_pipe(i_pipe, fd)
| I_pipe_server i_psrv ->
W32_pipe_server(i_psrv, fd)
| I_process i_proc ->
W32_process(i_proc, fd)
| I_input_thread(i_thr, keep_alive) ->
W32_input_thread(i_thr, fd, keep_alive)
| I_output_thread(o_thr, keep_alive) ->
W32_output_thread(o_thr, fd, keep_alive)
)
)
()
let lookup_pipe fd =
try
match lookup fd with
| W32_pipe ph -> ph
| _ -> raise Not_found
with Not_found ->
failwith "Netsys_win32.lookup_pipe: not found"
let lookup_pipe_server fd =
try
match lookup fd with
| W32_pipe_server ph -> ph
| _ -> raise Not_found
with Not_found ->
failwith "Netsys_win32.lookup_pipe_server: not found"
let lookup_event fd =
try
match lookup fd with
| W32_event e -> e
| _ -> raise Not_found
with Not_found ->
failwith "Netsys_win32.lookup_event: not found"
let lookup_process fd =
try
match lookup fd with
| W32_process e -> e
| _ -> raise Not_found
with Not_found ->
failwith "Netsys_win32.lookup_process: not found"
let lookup_input_thread fd =
try
match lookup fd with
| W32_input_thread e -> e
| _ -> raise Not_found
with Not_found ->
failwith "Netsys_win32.lookup_input_thread: not found"
let lookup_output_thread fd =
try
match lookup fd with
| W32_output_thread e -> e
| _ -> raise Not_found
with Not_found ->
failwith "Netsys_win32.lookup_output_thread: not found"
external get_active_code_page : unit -> int
= "netsys_getacp"
external netsys_real_select :
Unix.file_descr list ->
Unix.file_descr list ->
Unix.file_descr list ->
float ->
(Unix.file_descr list * Unix.file_descr list * Unix.file_descr list)
= "netsys_real_select"
let real_select = netsys_real_select
external netsys_test_close_on_exec : Unix.file_descr -> bool
= "netsys_test_close_on_exec"
let test_close_on_exec = netsys_test_close_on_exec
external netsys_modify_close_on_exec : Unix.file_descr -> bool -> unit
= "netsys_modify_close_on_exec"
let modify_close_on_exec = netsys_modify_close_on_exec
external netsys_is_crt_fd : Unix.file_descr -> int -> bool
= "netsys_is_crt_fd"
let is_crt_fd = netsys_is_crt_fd
external netsys_create_event : unit -> c_event
= "netsys_create_event"
external netsys_event_descr : c_event -> Unix.file_descr
= "netsys_event_descr"
external netsys_close_event : c_event -> unit
= "netsys_close_event"
external netsys_set_auto_close_event_proxy : c_event -> bool -> unit
= "netsys_set_auto_close_event_proxy"
let decorate_event e =
let e_proxy = netsys_event_descr e in
let ev = (e, e_proxy) in
Gc.finalise netsys_close_event e;
register_proxy e_proxy (I_event e);
ev
let create_event() =
let ev = decorate_event(netsys_create_event()) in
dlogr (fun () ->
sprintf "create_event: descr=%Ld"
(int64_of_file_descr (snd ev)));
ev
let event_descr (e,e_proxy) =
netsys_set_auto_close_event_proxy e false;
e_proxy
external netsys_set_event : c_event -> unit
= "netsys_set_event"
external netsys_reset_event : c_event -> unit
= "netsys_reset_event"
external netsys_test_event : c_event -> bool
= "netsys_test_event"
external netsys_event_wait : c_event -> int -> bool
= "netsys_event_wait"
let set_event (e,e_proxy) =
dlogr (fun () ->
sprintf "set_event: descr=%Ld"
(int64_of_file_descr e_proxy));
netsys_set_event e
let reset_event (e,e_proxy) =
dlogr (fun () ->
sprintf "reset_event: descr=%Ld"
(int64_of_file_descr e_proxy));
netsys_reset_event e
let test_event (e,_) = netsys_test_event e
let event_wait (e,e_proxy) tmo =
dlogr (fun () ->
sprintf "event_wait: descr=%Ld tmo=%f"
(int64_of_file_descr e_proxy) tmo);
let flag =
Netsys_impl_util.slice_time_ms
(fun tmo_ms ->
if netsys_event_wait e tmo_ms then Some () else None
)
tmo
<> None in
dlogr (fun () ->
sprintf "event_wait: descr=%Ld returning %b"
(int64_of_file_descr e_proxy) flag);
flag
external netsys_wsa_event_select :
c_event -> Unix.file_descr -> Netsys_posix.poll_req_events -> unit
= "netsys_wsa_event_select"
external wsa_maximum_wait_events : unit -> int
= "netsys_wsa_maximum_wait_events"
external netsys_wsa_wait_for_multiple_events :
c_event array -> int -> int option
= "netsys_wsa_wait_for_multiple_events"
external netsys_wsa_enum_network_events :
Unix.file_descr -> c_event -> Netsys_posix.poll_act_events
= "netsys_wsa_enum_network_events"
let wsa_event_select (e,e_proxy) fd pie =
dlogr (fun () ->
sprintf "wsa_event_select: evdescr=%Ld sockdescr=%Ld bits=%d"
(int64_of_file_descr e_proxy)
(int64_of_file_descr fd)
(Netsys_posix.int_of_req_events pie)
);
netsys_wsa_event_select e fd pie
let wsa_wait_for_multiple_events ea n =
dlogr (fun () ->
sprintf "wsa_wait_for_multiple_events: descrs=%s tmo=%d"
(String.concat ","
(Array.to_list
(Array.map
(fun (_,e_proxy) ->
Int64.to_string(int64_of_file_descr e_proxy))
ea)))
n
);
let r =
netsys_wsa_wait_for_multiple_events (Array.map fst ea) n in
dlogr (fun () ->
sprintf "wsa_wait_for_multiple_events: returning %s"
(match r with
| None -> "None"
| Some k ->
let e_proxy = snd(ea.(k)) in
sprintf "Some %d (descr %Ld)"
k (int64_of_file_descr e_proxy)
));
r
let wsa_enum_network_events fd (e,e_proxy) =
let r = netsys_wsa_enum_network_events fd e in
dlogr (fun () ->
sprintf "wsa_enum_network_events: sockdescr=%Ld evdescr=%Ld bits=%d"
(int64_of_file_descr fd)
(int64_of_file_descr e_proxy)
(Netsys_posix.int_of_act_events r)
);
r
external netsys_pipe_free :
c_pipe_helper -> unit
= "netsys_pipe_free"
external netsys_create_local_named_pipe :
string -> pipe_mode -> int -> c_event -> bool -> c_pipe_helper
= "netsys_create_local_named_pipe"
external netsys_pipe_listen :
c_pipe_helper -> unit
= "netsys_pipe_listen"
external netsys_pipe_deafen :
c_pipe_helper -> unit
= "netsys_pipe_deafen"
external netsys_pipe_connect :
string -> pipe_mode -> c_pipe_helper
= "netsys_pipe_connect"
external netsys_pipe_read :
c_pipe_helper -> Bytes.t -> int -> int -> int
= "netsys_pipe_read"
external netsys_pipe_write :
c_pipe_helper -> Bytes.t -> int -> int -> int
= "netsys_pipe_write"
external netsys_pipe_shutdown :
c_pipe_helper -> unit
= "netsys_pipe_shutdown"
external netsys_pipe_rd_event :
c_pipe_helper -> c_event
= "netsys_pipe_rd_event"
external netsys_pipe_wr_event :
c_pipe_helper -> c_event
= "netsys_pipe_wr_event"
external netsys_pipe_descr :
c_pipe_helper -> Unix.file_descr
= "netsys_pipe_descr"
external netsys_pipe_conn_state :
c_pipe_helper -> pipe_conn_state
= "netsys_pipe_conn_state"
external netsys_pipe_signal :
c_pipe_helper -> c_event -> unit
= "netsys_pipe_signal"
external netsys_set_auto_close_pipe_proxy : c_pipe_helper -> bool -> unit
= "netsys_set_auto_close_pipe_proxy"
let rev_mode =
function
| Pipe_in -> Pipe_out
| Pipe_out -> Pipe_in
| Pipe_duplex -> Pipe_duplex
let create_local_pipe_server name mode n =
let cn_event = create_event() in
let p_event = netsys_create_event() in
let proxy = netsys_event_descr p_event in
let psrv =
{ psrv_name = name;
psrv_mode = mode;
psrv_max = n;
psrv_first = true;
psrv_queue = [];
psrv_listen = 0;
psrv_ready = Queue.create();
psrv_cn_event = cn_event;
psrv_proxy_handle = p_event;
psrv_mutex = !Netsys_oothr.provider # create_mutex();
} in
Gc.finalise netsys_close_event p_event;
register_proxy proxy (I_pipe_server psrv);
dlogr (fun () ->
sprintf "create_local_pipe_server: \
name=%s proxydescr=%Ld cnevdescr=%Ld"
name
(int64_of_file_descr proxy)
(int64_of_file_descr (snd cn_event))
);
(psrv, proxy)
let decorate_pipe_nogc ph name mode =
let fd = netsys_pipe_descr ph in
let pipe =
{ pipe_name = name;
pipe_mode = mode;
pipe_helper = ph;
* pipe_signal = None; *)
pipe_rd_event = decorate_event(netsys_pipe_rd_event ph);
pipe_wr_event = decorate_event(netsys_pipe_wr_event ph);
} in
register_proxy fd (I_pipe pipe);
(pipe, fd)
let decorate_pipe ph name mode =
Gc.finalise netsys_pipe_free ph;
decorate_pipe_nogc ph name mode
let prefix = "\\\\.\\pipe\\"
let prefix_len = String.length prefix
let pipe_connect name mode =
if String.length name < prefix_len ||
(String.sub name 0 prefix_len <> prefix)
then
raise(Unix.Unix_error(Unix.EPERM, "pipe_connect", name));
dlogr (fun () -> sprintf "pipe_connect: name=%s" name);
let pipe = decorate_pipe(netsys_pipe_connect name mode) name mode in
dlogr (fun () -> sprintf "pipe_connect: name=%s returning %Ld"
name (int64_of_file_descr (snd pipe)));
pipe
let pipe_server_descr (psrv, psrv_proxy) =
netsys_set_auto_close_event_proxy psrv.psrv_proxy_handle false;
psrv_proxy
let pipe_descr (pipe, pipe_proxy) =
netsys_set_auto_close_pipe_proxy pipe.pipe_helper false;
pipe_proxy
let pipe_server_endpoint psrv =
let ph =
netsys_create_local_named_pipe
psrv.psrv_name psrv.psrv_mode psrv.psrv_max
(fst psrv.psrv_cn_event) psrv.psrv_first in
Gc.finalise netsys_pipe_free ph;
netsys_pipe_listen ph;
psrv.psrv_first <- false;
ph
let pipe_listen_lck psrv n =
if psrv.psrv_listen < n then (
let d = n - psrv.psrv_listen in
for k = 1 to d do
let ph = pipe_server_endpoint psrv in
psrv.psrv_queue <- ph :: psrv.psrv_queue
done
);
psrv.psrv_listen <- n
let pipe_listen (psrv, psrv_proxy) n =
dlogr (fun () -> sprintf "pipe_listen: name=%s proxydescr=%Ld n=%d"
psrv.psrv_name (int64_of_file_descr psrv_proxy) n);
Netsys_oothr.serialize
psrv.psrv_mutex
(fun () -> pipe_listen_lck psrv n)
()
let check_for_connections psrv =
let rec find_delete l =
match l with
| [] ->
[]
| ph :: l' ->
let s = netsys_pipe_conn_state ph in
if s = Pipe_connected then (
Queue.push ph psrv.psrv_ready;
find_delete l'
)
else
ph :: find_delete l'
in
let queue' = find_delete psrv.psrv_queue in
let old_listen = psrv.psrv_listen in
psrv.psrv_listen <- List.length queue';
psrv.psrv_queue <- queue';
pipe_listen_lck psrv old_listen
let empty_buf = Bytes.create 0
let rec pipe_accept_1 psrv =
match Queue.length psrv.psrv_ready with
| 0 ->
ignore(event_wait psrv.psrv_cn_event (-1.0));
reset_event psrv.psrv_cn_event;
check_for_connections psrv;
if not(Queue.is_empty psrv.psrv_ready) then
set_event psrv.psrv_cn_event;
pipe_accept_1 psrv
| 1 ->
let ph = Queue.take psrv.psrv_ready in
reset_event psrv.psrv_cn_event;
check_for_connections psrv;
if not(Queue.is_empty psrv.psrv_ready) then
set_event psrv.psrv_cn_event;
ignore(netsys_pipe_read ph empty_buf 0 0);
decorate_pipe_nogc ph psrv.psrv_name psrv.psrv_mode
| _ ->
let ph = Queue.take psrv.psrv_ready in
ignore(netsys_pipe_read ph empty_buf 0 0);
decorate_pipe_nogc ph psrv.psrv_name psrv.psrv_mode
let pipe_accept (psrv, psrv_proxy) =
dlogr (fun () -> sprintf "pipe_accept: name=%s proxydescr=%Ld"
psrv.psrv_name (int64_of_file_descr psrv_proxy));
let pipe =
Netsys_oothr.serialize
psrv.psrv_mutex
(fun () -> pipe_accept_1 psrv)
() in
dlogr (fun () -> sprintf "pipe_accept: name=%s proxydescr=%Ld returning %Ld"
psrv.psrv_name (int64_of_file_descr psrv_proxy)
(int64_of_file_descr (snd pipe))
);
pipe
let pipe_rd_event (pipe,_) =
pipe.pipe_rd_event
let pipe_wr_event (pipe,_) =
pipe.pipe_wr_event
let pipe_connect_event (psrv,_) =
psrv.psrv_cn_event
let pipe_read (pipe,pipe_proxy) s pos len =
if pos < 0 || len < 0 || pos > Bytes.length s - len then
invalid_arg "Netsys_win32.pipe_read";
dlogr (fun () -> sprintf "pipe_read: name=%s proxydescr=%Ld len=%d"
pipe.pipe_name (int64_of_file_descr pipe_proxy) len);
try
let n = netsys_pipe_read pipe.pipe_helper s pos len in
dlogr (fun () -> sprintf "pipe_read: name=%s proxydescr=%Ld returning %d"
pipe.pipe_name (int64_of_file_descr pipe_proxy) n);
n
with
| error when !Debug.enable ->
dlogr (fun () ->
sprintf "pipe_read: name=%s proxydescr=%Ld exception %s"
pipe.pipe_name (int64_of_file_descr pipe_proxy)
(Netexn.to_string error)
);
raise error
let pipe_write (pipe,pipe_proxy) s pos len =
if pos < 0 || len < 0 || pos > Bytes.length s - len then
invalid_arg "Netsys_win32.pipe_write";
dlogr (fun () -> sprintf "pipe_write: name=%s proxydescr=%Ld len=%d"
pipe.pipe_name (int64_of_file_descr pipe_proxy) len);
try
let n = netsys_pipe_write pipe.pipe_helper s pos len in
dlogr (fun () -> sprintf "pipe_write: name=%s proxydescr=%Ld returning %d"
pipe.pipe_name (int64_of_file_descr pipe_proxy) n);
n
with
| error when !Debug.enable ->
dlogr (fun () ->
sprintf "pipe_write: name=%s proxydescr=%Ld exception %s"
pipe.pipe_name (int64_of_file_descr pipe_proxy)
(Netexn.to_string error)
);
raise error
let pipe_write_string (pipe,pipe_proxy) s pos len =
pipe_write (pipe,pipe_proxy) (Bytes.unsafe_of_string s) pos len
let pipe_shutdown (pipe,pipe_proxy) =
dlogr (fun () -> sprintf "pipe_shutdown: name=%s proxydescr=%Ld"
pipe.pipe_name (int64_of_file_descr pipe_proxy));
netsys_pipe_shutdown pipe.pipe_helper
let pipe_shutdown_server (psrv,psrv_proxy) =
dlogr (fun () -> sprintf "pipe_shutdown_server: name=%s proxydescr=%Ld"
psrv.psrv_name (int64_of_file_descr psrv_proxy));
Netsys_oothr.serialize
psrv.psrv_mutex
(fun () ->
List.iter
(fun ph ->
netsys_pipe_shutdown ph
)
psrv.psrv_queue;
psrv.psrv_queue <- [];
psrv.psrv_listen <- 0
)
()
let pipe_wait_rd (pipe,pipe_proxy) tmo =
dlogr (fun () -> sprintf "pipe_wait_rd: name=%s proxydescr=%Ld"
pipe.pipe_name (int64_of_file_descr pipe_proxy));
event_wait pipe.pipe_rd_event tmo
let pipe_wait_wr (pipe,pipe_proxy) tmo =
dlogr (fun () -> sprintf "pipe_wait_wr: name=%s proxydescr=%Ld"
pipe.pipe_name (int64_of_file_descr pipe_proxy));
event_wait pipe.pipe_wr_event tmo
let pipe_wait_connect (psrv,psrv_proxy) tmo =
dlogr (fun () -> sprintf "pipe_wait_connect: name=%s proxydescr=%Ld"
psrv.psrv_name (int64_of_file_descr psrv_proxy));
event_wait psrv.psrv_cn_event tmo
let pipe_name (pipe,_) =
pipe.pipe_name
let pipe_server_name (psrv,_) =
psrv.psrv_name
let pipe_mode (pipe,_) =
pipe.pipe_mode
let pipe_server_mode (psrv,_) =
psrv.psrv_mode
let counter = ref 0
let counter_mutex = !Netsys_oothr.provider # create_mutex()
let unpredictable_pipe_name() =
let n = (
counter_mutex # lock();
let n = !counter in
incr counter;
counter_mutex # unlock();
n
) in
let random = Bytes.make 16 ' ' in
fill_random random;
let name =
"\\\\.\\pipe\\ocamlnet" ^
string_of_int (Unix.getpid()) ^ "_" ^ string_of_int n ^ "_" ^
Digest.to_hex(Bytes.to_string random) in
name
let pipe_pair mode =
dlog "pipe_pair";
let mode' =
match mode with
| Pipe_in -> Pipe_out
| Pipe_out -> Pipe_in
| Pipe_duplex -> Pipe_duplex in
let name = unpredictable_pipe_name() in
let psrv = create_local_pipe_server name mode 1 in
pipe_listen psrv 1;
let rph = pipe_connect name mode' in
( try
pipe_listen psrv 0;
let lph = pipe_accept psrv in
( try
let s = Bytes.create 0 in
ignore(pipe_write lph s 0 0);
dlogr
(fun () ->
sprintf "pipe_pair: returning \
name=%s proxydescr1=%Ld proxydescr2=%Ld"
name
(int64_of_file_descr (snd lph))
(int64_of_file_descr (snd rph))
);
(lph, rph)
with e ->
pipe_shutdown lph;
raise e
)
with e ->
pipe_shutdown rph;
raise e
)
external netsys_create_process : string -> string ->
create_process_option list -> c_process
= "netsys_create_process"
external netsys_close_process : c_process -> unit
= "netsys_close_process"
external netsys_get_process_status : c_process -> int
= "netsys_get_process_status"
external netsys_as_process_event : c_process -> c_event
= "netsys_as_process_event"
external netsys_emulated_pid : c_process -> int
= "netsys_emulated_pid"
external netsys_win_pid : c_process -> int
= "netsys_win_pid"
external netsys_process_free : c_process -> unit
= "netsys_process_free"
external netsys_process_descr : c_process -> Unix.file_descr
= "netsys_process_descr"
external netsys_set_auto_close_process_proxy : c_process -> bool -> unit
= "netsys_set_auto_close_process_proxy"
external netsys_terminate_process : c_process -> unit
= "netsys_terminate_process"
let close_process (c_proc, _) =
netsys_process_free c_proc
let get_process_status (c_proc,_) =
try
let code = netsys_get_process_status c_proc in
Some(Unix.WEXITED code)
with
| Not_found -> None
let default_opts =
[ CP_inherit_or_create_console;
CP_ansi_environment;
CP_inherit_process_group
]
let create_process cmd cmdline opts =
let opts =
default_opts @ opts in
let c_proc = netsys_create_process cmd cmdline opts in
let proxy = netsys_process_descr c_proc in
register_proxy proxy (I_process c_proc);
Gc.finalise netsys_process_free c_proc;
ignore(get_process_status (c_proc,proxy));
(c_proc, proxy)
let terminate_process (c_proc,_) =
netsys_terminate_process c_proc
let as_process_event (c_proc,_) =
let ev = netsys_as_process_event c_proc in
decorate_event ev
let emulated_pid (c_proc,_) =
netsys_emulated_pid c_proc
let win_pid (c_proc, _) =
netsys_win_pid c_proc
let process_descr (c_proc, fd) =
netsys_set_auto_close_process_proxy c_proc false;
fd
let cp_set_env env =
CP_set_env(String.concat "\000" (Array.to_list env) ^ "\000")
external search_path : string option -> string -> string option -> string
= "netsys_search_path"
type w32_console_attr =
{ mutable cursor_x : int;
mutable cursor_y : int;
mutable cursor_size : int;
mutable cursor_visible : bool;
mutable text_attr : int;
}
type w32_console_info =
{
mutable width : int;
mutable height : int;
}
type w32_console_mode =
{ mutable enable_echo_input : bool;
mutable enable_insert_mode : bool;
mutable enable_line_input : bool;
mutable enable_processed_input : bool;
mutable enable_quick_edit_mode : bool;
mutable enable_processed_output : bool;
mutable enable_wrap_at_eol_output : bool;
}
external has_console : unit -> bool
= "netsys_has_console"
external is_console : Unix.file_descr -> bool
= "netsys_is_console"
external alloc_console : unit -> unit
= "netsys_alloc_console"
let get_console_input() =
if not(has_console()) then
alloc_console();
Unix.openfile "CONIN$" [Unix.O_RDWR] 0
let get_console_output() =
if not(has_console()) then
alloc_console();
Unix.openfile "CONOUT$" [Unix.O_RDWR] 0
external get_console_attr : unit -> w32_console_attr
= "netsys_get_console_attr"
external set_console_attr : w32_console_attr -> unit
= "netsys_set_console_attr"
external get_console_info : unit -> w32_console_info
= "netsys_get_console_info"
let fg_blue = 1
let fg_green = 2
let fg_red = 4
let fg_intensity = 8
let bg_blue = 16
let bg_green = 32
let bg_red = 64
let bg_intensity = 128
external get_console_mode : unit -> w32_console_mode
= "netsys_get_console_mode"
external set_console_mode : w32_console_mode -> unit
= "netsys_set_console_mode"
external init_console_codepage : unit -> unit
= "netsys_init_console_codepage"
type clear_mode =
| EOL | EOS | All
external clear_console : clear_mode -> unit
= "netsys_clear_console"
let clear_until_end_of_line() = clear_console EOL
let clear_until_end_of_screen() = clear_console EOS
let clear_console() = clear_console All
external get_current_thread_id : unit -> int32
= "netsys_get_current_thread_id"
external cancel_synchronous_io : int32 -> unit
= "netsys_cancel_synchronous_io"
and newer). *)
module InputThread = struct
let rec thread_body (ithr : i_input_thread) =
dlogr (fun () ->
sprintf "input_thread_body: descr=%Ld waiting"
(int64_of_file_descr ithr.ithr_descr));
ithr.ithr_cmd_mutex # lock();
while ithr.ithr_cmd = None && not ithr.ithr_cancel_cmd do
ithr.ithr_cmd_cond # wait ithr.ithr_cmd_mutex
done;
let next_cmd =
if ithr.ithr_cancel_cmd then
`Cancel
else
match ithr.ithr_cmd with
| None ->
assert false
| Some c ->
ithr.ithr_cmd <- None;
c in
let continue =
match next_cmd with
| `Cancel ->
dlogr (fun () ->
sprintf "input_thread_body: descr=%Ld got `Cancel"
(int64_of_file_descr ithr.ithr_descr));
ithr.ithr_buffer_cond <- `Cancelled;
false
| `Read ->
dlogr (fun () ->
sprintf "input_thread_body: descr=%Ld got `Read"
(int64_of_file_descr ithr.ithr_descr));
( try
let n =
Unix.read
ithr.ithr_descr
ithr.ithr_buffer
0
(Bytes.length ithr.ithr_buffer) in
if n = 0 then (
ithr.ithr_buffer_cond <- `EOF;
ithr.ithr_buffer_start <- 0;
ithr.ithr_buffer_len <- 0;
false
)
else (
ithr.ithr_buffer_cond <- `Data;
ithr.ithr_buffer_start <- 0;
ithr.ithr_buffer_len <- n;
true
)
with
| Unix.Unix_error(Unix.EPIPE,_,_) ->
ithr.ithr_buffer_cond <- `EOF;
ithr.ithr_buffer_start <- 0;
ithr.ithr_buffer_len <- 0;
false
| error ->
ithr.ithr_buffer_cond <- `Exception error;
ithr.ithr_buffer_start <- 0;
ithr.ithr_buffer_len <- 0;
false
)
in
dlogr (fun () ->
sprintf "input_thread_body: descr=%Ld unblocking"
(int64_of_file_descr ithr.ithr_descr));
set_event ithr.ithr_event;
ithr.ithr_cmd_mutex # unlock();
if continue then
thread_body ithr
else (
dlogr (fun () ->
sprintf "input_thread_body: descr=%Ld terminating"
(int64_of_file_descr ithr.ithr_descr));
Unix.close ithr.ithr_descr;
ithr.ithr_running <- false
)
let i_cancel_input_thread ithr =
dlogr (fun () ->
sprintf "cancel_input_thread: descr=%Ld"
(int64_of_file_descr ithr.ithr_descr));
ithr.ithr_cancel_cmd <- true;
ithr.ithr_cmd_cond # signal();
This is clearly a race condition... The thread may terminate
right now, and cancel_io_thread is called with an invalid thread
ID.
*)
if ithr.ithr_running then (
try
cancel_synchronous_io ithr.ithr_thread
with _ -> ()
)
let f_cancel_input_thread ithr _ =
i_cancel_input_thread ithr
let cancel_input_thread (ithr,_,_) =
i_cancel_input_thread ithr
let create_input_thread fd =
let oothr = !Netsys_oothr.provider in
let init_cond = oothr#create_condition() in
let init_mutex = oothr#create_mutex() in
let p_event = netsys_create_event() in
let proxy = netsys_event_descr p_event in
let ithr =
{ ithr_descr = fd;
ithr_cmd_cond = oothr#create_condition();
ithr_cmd_mutex = oothr#create_mutex();
ithr_cmd = Some `Read;
ithr_cancel_cmd = false;
ithr_event = create_event();
ithr_buffer = Bytes.create 4096;
ithr_buffer_start = 0;
ithr_buffer_len = 0;
ithr_buffer_cond = `Data;
ithr_thread = 0l;
ithr_read_mutex = oothr#create_mutex();
ithr_running = true;
ithr_proxy_handle = p_event;
} in
let _ =
oothr # create_thread
(fun () ->
ithr.ithr_thread <- get_current_thread_id();
init_cond # signal();
thread_body ithr
)
() in
init_cond # wait init_mutex;
let f = f_cancel_input_thread ithr in
let keep_alive = (object end) in
Gc.finalise f keep_alive;
Gc.finalise netsys_close_event p_event;
register_proxy proxy (I_input_thread(ithr, keep_alive));
(ithr, proxy, keep_alive)
let input_thread_read (ithr,_,_) s pos len =
if pos < 0 || len < 0 || pos > Bytes.length s - len then
invalid_arg "Netsys_win32.input_thread_read";
if len = 0 then
0
else (
Netsys_oothr.serialize
ithr.ithr_read_mutex
(fun () ->
let b = test_event ithr.ithr_event in
if b then (
ithr.ithr_cmd_mutex # lock();
Look at what we have: *)
match ithr.ithr_buffer_cond with
| `EOF ->
ithr.ithr_cmd_mutex # unlock();
0
| `Exception e ->
ithr.ithr_cmd_mutex # unlock();
raise e
| `Cancelled ->
ithr.ithr_cmd_mutex # unlock();
raise(Unix.Unix_error(Unix.EPERM,
"Netsys_win32.input_thread_read", ""))
| `Data ->
let n = min len ithr.ithr_buffer_len in
Bytes.blit
ithr.ithr_buffer ithr.ithr_buffer_start
s pos
n;
ithr.ithr_buffer_start <- ithr.ithr_buffer_start + n;
ithr.ithr_buffer_len <- ithr.ithr_buffer_len - n;
if ithr.ithr_buffer_len = 0 then (
ithr.ithr_cmd <- Some `Read;
ithr.ithr_cmd_cond # signal();
reset_event ithr.ithr_event;
);
ithr.ithr_cmd_mutex # unlock();
n
)
else
raise(Unix.Unix_error(Unix.EAGAIN,
"Netsys_win32.input_thread_read", ""))
)
()
)
let input_thread_event (ithr,_,_) =
ithr.ithr_event
let input_thread_proxy_descr (ithr, proxy, _) =
netsys_set_auto_close_event_proxy ithr.ithr_proxy_handle false;
proxy
end
let create_input_thread = InputThread.create_input_thread
let input_thread_event = InputThread.input_thread_event
let input_thread_read = InputThread.input_thread_read
let cancel_input_thread = InputThread.cancel_input_thread
let input_thread_proxy_descr = InputThread.input_thread_proxy_descr
let input_thread_descr (ithr,_,_) = ithr.ithr_descr
module OutputThread = struct
let rec write_string othr pos len =
if len = 0 || othr.othr_cancel_cmd then
()
else
let n = Unix.single_write othr.othr_descr othr.othr_buffer pos len in
write_string othr (pos+n) (len-n)
let rec thread_body (othr : i_output_thread) =
dlogr (fun () ->
sprintf "output_thread_body: descr=%Ld waiting"
(int64_of_file_descr othr.othr_descr));
othr.othr_cmd_mutex # lock();
while othr.othr_cmd = None && not othr.othr_cancel_cmd do
othr.othr_cmd_cond # wait othr.othr_cmd_mutex
done;
let next_cmd =
if othr.othr_cancel_cmd then
`Cancel
else
match othr.othr_cmd with
| None ->
assert false
| Some c ->
othr.othr_cmd <- None;
c in
let continue =
match next_cmd with
| `Cancel ->
dlogr (fun () ->
sprintf "output_thread_body: descr=%Ld got `Cancel"
(int64_of_file_descr othr.othr_descr));
othr.othr_buffer_len <- 0;
othr.othr_write_cond <- Some `Cancelled;
false
| `Close ->
dlogr (fun () ->
sprintf "output_thread_body: descr=%Ld got `Close"
(int64_of_file_descr othr.othr_descr));
othr.othr_write_cond <- Some `Cancelled;
false
| `Write ->
dlogr (fun () ->
sprintf "output_thread_body: descr=%Ld got `Write"
(int64_of_file_descr othr.othr_descr));
( try
write_string othr 0 othr.othr_buffer_len;
othr.othr_buffer_len <- 0;
true
with
| error ->
othr.othr_write_cond <- Some (`Exception error);
false
)
in
dlogr (fun () ->
sprintf "output_thread_body: descr=%Ld unblocking"
(int64_of_file_descr othr.othr_descr));
set_event othr.othr_event;
othr.othr_cmd_mutex # unlock();
if continue then
thread_body othr
else (
dlogr (fun () ->
sprintf "output_thread_body: descr=%Ld terminating"
(int64_of_file_descr othr.othr_descr));
Unix.close othr.othr_descr;
othr.othr_running <- false
)
let i_cancel_output_thread othr =
dlogr (fun () ->
sprintf "cancel_output_thread: descr=%Ld"
(int64_of_file_descr othr.othr_descr));
othr.othr_cancel_cmd <- true;
othr.othr_cmd_cond # signal();
This is clearly a race condition... The thread may terminate
right now, and cancel_io_thread is called with an invalid thread
ID.
*)
if othr.othr_running then (
try
cancel_synchronous_io othr.othr_thread
with _ -> ()
)
let f_cancel_output_thread othr _ =
i_cancel_output_thread othr
let cancel_output_thread (othr,_,_) =
i_cancel_output_thread othr
let create_output_thread fd =
let oothr = !Netsys_oothr.provider in
let init_cond = oothr#create_condition() in
let init_mutex = oothr#create_mutex() in
let p_event = netsys_create_event() in
let proxy = netsys_event_descr p_event in
let othr =
{ othr_descr = fd;
othr_cmd_cond = oothr#create_condition();
othr_cmd_mutex = oothr#create_mutex();
othr_cmd = None;
othr_cancel_cmd = false;
othr_event = create_event();
othr_buffer = Bytes.create 4096;
othr_buffer_len = 0;
othr_write_cond = None;
othr_thread = 0l;
othr_write_mutex = oothr#create_mutex();
othr_running = true;
othr_proxy_handle = p_event;
} in
set_event othr.othr_event;
let _ =
oothr # create_thread
(fun () ->
othr.othr_thread <- get_current_thread_id();
init_cond # signal();
thread_body othr
)
() in
init_cond # wait init_mutex;
let f = f_cancel_output_thread othr in
let keep_alive = (object end) in
Gc.finalise f keep_alive;
Gc.finalise netsys_close_event p_event;
register_proxy proxy (I_output_thread(othr, keep_alive));
(othr, proxy, keep_alive)
let output_thread_write (othr,_,_) s pos len =
if pos < 0 || len < 0 || pos > Bytes.length s - len then
invalid_arg "Netsys_win32.output_thread_write";
if len = 0 then
0
else (
Netsys_oothr.serialize
othr.othr_write_mutex
(fun () ->
let b = test_event othr.othr_event in
if b then (
othr.othr_cmd_mutex # lock();
* Look at what we have: *)
match othr.othr_write_cond with
| Some(`Exception e) ->
othr.othr_cmd_mutex # unlock();
raise e
| Some `Cancelled ->
othr.othr_cmd_mutex # unlock();
raise(Unix.Unix_error(Unix.EPERM,
"Netsys_win32.output_thread_write",
""))
| None ->
assert(othr.othr_buffer_len = 0);
let n = min len (Bytes.length othr.othr_buffer) in
Bytes.blit
s pos
othr.othr_buffer 0
n;
othr.othr_buffer_len <- n;
othr.othr_cmd <- Some `Write;
othr.othr_cmd_cond # signal();
reset_event othr.othr_event;
othr.othr_cmd_mutex # unlock();
n
)
else
raise(Unix.Unix_error(Unix.EAGAIN,
"Netsys_win32.output_thread_write", ""))
)
()
)
let close_output_thread (othr,_,_) =
Netsys_oothr.serialize
othr.othr_write_mutex only one writer at a time *)
(fun () ->
let b = test_event othr.othr_event in
if b then (
othr.othr_cmd_mutex # lock();
Look at what we have: *)
match othr.othr_write_cond with
| Some(`Exception e) ->
othr.othr_cmd_mutex # unlock();
raise e
| Some `Cancelled ->
othr.othr_cmd_mutex # unlock();
raise(Unix.Unix_error(Unix.EPERM,
"Netsys_win32.close_output_thread",
""))
| None ->
assert(othr.othr_buffer_len = 0);
othr.othr_cmd <- Some `Close;
othr.othr_cmd_cond # signal();
reset_event othr.othr_event;
othr.othr_cmd_mutex # unlock();
)
else
raise(Unix.Unix_error(Unix.EAGAIN,
"Netsys_win32.close_output_thread", ""))
)
()
let output_thread_event (othr,_,_) =
othr.othr_event
let output_thread_proxy_descr (othr, proxy, _) =
netsys_set_auto_close_event_proxy othr.othr_proxy_handle false;
proxy
end
let create_output_thread = OutputThread.create_output_thread
let output_thread_event = OutputThread.output_thread_event
let output_thread_write = OutputThread.output_thread_write
let cancel_output_thread = OutputThread.cancel_output_thread
let close_output_thread = OutputThread.close_output_thread
let output_thread_proxy_descr = OutputThread.output_thread_proxy_descr
let output_thread_descr (othr,_,_) = othr.othr_descr
let output_thread_write_string out s pos len =
output_thread_write out (Bytes.unsafe_of_string s) pos len