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/***********************************************************************/
/* */
/* Objective Caml */
/* */
/* Pascal Cuoq and Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* en Automatique. All rights reserved. This file is distributed */
/* under the terms of the GNU Library General Public License, with */
/* the special exception on linking described in file ../../LICENSE. */
/* */
/***********************************************************************/
/* $Id$ */
#include <windows.h>
#include <mlvalues.h>
#include <alloc.h>
#include <memory.h>
#include "unixsupport.h"
#include <sys/types.h>
#include <signals.h>
static value alloc_process_status(HANDLE pid, int status)
{
value res, st;
st = alloc(1, 0);
Field(st, 0) = Val_int(status);
Begin_root (st);
res = alloc_small(2, 0);
Field(res, 0) = Val_long((intnat) pid);
Field(res, 1) = st;
End_roots();
return res;
}
enum { CAML_WNOHANG = 1, CAML_WUNTRACED = 2 };
static int wait_flag_table[] = { CAML_WNOHANG, CAML_WUNTRACED };
CAMLprim value win_waitpid(value vflags, value vpid_req)
{
int flags;
DWORD status, retcode;
HANDLE pid_req = (HANDLE) Long_val(vpid_req);
DWORD err = 0;
flags = convert_flag_list(vflags, wait_flag_table);
if ((flags & CAML_WNOHANG) == 0) {
enter_blocking_section();
retcode = WaitForSingleObject(pid_req, INFINITE);
if (retcode == WAIT_FAILED) err = GetLastError();
leave_blocking_section();
if (err) {
win32_maperr(err);
uerror("waitpid", Nothing);
}
}
if (! GetExitCodeProcess(pid_req, &status)) {
win32_maperr(GetLastError());
uerror("waitpid", Nothing);
}
if (status == STILL_ACTIVE)
return alloc_process_status((HANDLE) 0, 0);
else {
CloseHandle(pid_req);
return alloc_process_status(pid_req, status);
}
}
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