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