From e551a3ad60ee022f9f4d20ca553538425e1b74c9 Mon Sep 17 00:00:00 2001
From: "Guillermo J. Rozas" <edu/mit/csail/zurich/gjr>
Date: Wed, 1 Sep 1993 18:45:38 +0000
Subject: [PATCH] Initial revision

---
 v7/src/microcode/prntio.c | 115 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 v7/src/microcode/prntio.c

diff --git a/v7/src/microcode/prntio.c b/v7/src/microcode/prntio.c
new file mode 100644
index 000000000..f85f0e0cb
--- /dev/null
+++ b/v7/src/microcode/prntio.c
@@ -0,0 +1,115 @@
+/* -*-C-*-
+
+$Id: prntio.c,v 1.1 1993/09/01 18:45:38 gjr Exp $
+
+Copyright (c) 1993 Massachusetts Institute of Technology
+
+This material was developed by the Scheme project at the Massachusetts
+Institute of Technology, Department of Electrical Engineering and
+Computer Science.  Permission to copy this software, to redistribute
+it, and to use it for any purpose is granted, subject to the following
+restrictions and understandings.
+
+1. Any copy made of this software must include this copyright notice
+in full.
+
+2. Users of this software agree to make their best efforts (a) to
+return to the MIT Scheme project any improvements or extensions that
+they make, so that these may be included in future releases; and (b)
+to inform MIT of noteworthy uses of this software.
+
+3. All materials developed as a consequence of the use of this
+software shall duly acknowledge such use, in accordance with the usual
+standards of acknowledging credit in academic research.
+
+4. MIT has made no warrantee or representation that the operation of
+this software will be error-free, and MIT is under no obligation to
+provide any services, by way of maintenance, update, or otherwise.
+
+5. In conjunction with products arising from the use of this material,
+there shall be no use of the name of the Massachusetts Institute of
+Technology nor of any adaptation thereof in any advertising,
+promotional, or sales literature without prior written consent from
+MIT in each case. */
+
+/* Primitives to do the NT equivalent of Unix select. */
+
+#include <windows.h>
+#include "scheme.h"
+#include "prims.h"
+#include "ntio.h"
+#include "nt.h"
+#include "syscall.h"
+
+DEFINE_PRIMITIVE ("CHANNEL-DESCRIPTOR", Prim_channel_descriptor, 1, 1, 0)
+{
+  PRIMITIVE_HEADER (1);
+  PRIMITIVE_RETURN (long_to_integer (CHANNEL_HANDLE (arg_channel (1))));
+}
+
+static HANDLE *
+DEFUN (to_win_hand_vec, (nhand, schhands),
+       int nhand AND SCHEME_OBJECT * schhands)
+{
+  int ctr;
+  HANDLE * winhands;
+
+  if (nhand == 0)
+    return ((HANDLE *) NULL);
+  winhands = ((HANDLE *) (malloc (nhand * (sizeof (HANDLE)))));
+  if (winhands == ((HANDLE *) NULL))
+    error_system_call ((GetLastError ()), syscall_malloc);
+  for (ctr = 0; ctr < nhand; ctr++)
+    winhands[ctr] = ((HANDLE) (integer_to_long (schhands[ctr])));
+  return (winhands);
+}
+
+static SCHEME_OBJECT
+DEFUN (wait_result, (result, limit_object, limit_abandoned),
+       DWORD result AND int limit_object AND int limit_abandoned)
+{
+  if (result == WAIT_TIMEOUT)
+    return (FIXNUM_ZERO);
+  else if ((result >= WAIT_OBJECT_0) && (result <= (WAIT_OBJECT_0 + limit_object)))
+    return (long_to_integer ((result + 1) - WAIT_OBJECT_0));
+  else if ((result >= WAIT_ABANDONED_0) && (result <= (WAIT_ABANDONED_0 + limit_abandoned)))
+    return (long_to_integer (- ((result + 1) - WAIT_ABANDONED_0)));
+  else
+    error_system_call ((GetLastError ()), syscall_select);
+}
+
+DEFINE_PRIMITIVE ("NT:MSGWAITFORMULTIPLEOBJECTS", Prim_nt_msgwaitformultipleobjects, 4, 4, 0)
+{
+  PRIMITIVE_HEADER (4);
+  {
+    SCHEME_OBJECT schhands = (VECTOR_ARG (1));
+    BOOL wait_for_all = (BOOLEAN_ARG (2));
+    int timeout = (arg_nonnegative_integer (3));
+    int mask = (arg_nonnegative_integer (4));
+    int nhand = (VECTOR_LENGTH (schhands));
+    HANDLE * handles = (to_win_hand_vec (nhand, (VECTOR_LOC (schhands, 0))));
+    DWORD result = (MsgWaitForMultipleObjects (nhand, handles, wait_for_all,
+					       timeout, mask));
+
+    if (handles != ((HANDLE *) NULL))
+      free (handles);
+    PRIMITIVE_RETURN (wait_result (result, nhand, (nhand - 1)));
+  }
+}
+
+DEFINE_PRIMITIVE ("NT:WAITFORMULTIPLEOBJECTS", Prim_waitformultipleobjects, 3, 3, 0)
+{
+  PRIMITIVE_HEADER (3);
+  {
+    SCHEME_OBJECT schhands = (VECTOR_ARG (1));
+    BOOL wait_for_all = (BOOLEAN_ARG (2));
+    int timeout = (arg_nonnegative_integer (3));
+    int nhand = (VECTOR_LENGTH (schhands));
+    HANDLE * handles = (to_win_hand_vec (nhand, (VECTOR_LOC (schhands, 0))));
+    DWORD result = (WaitForMultipleObjects (nhand, handles, wait_for_all, timeout));
+
+    if (handles != ((HANDLE *) NULL))
+      free (handles);
+    PRIMITIVE_RETURN (wait_result (result, (nhand - 1), (nhand - 1)));
+  }
+}
-- 
2.25.1