From 1fd5e000ace55b323124c7e556a7a864b972a5c4 Mon Sep 17 00:00:00 2001
From: Christopher Faylor <me@cgf.cx>
Date: Thu, 17 Feb 2000 19:38:33 +0000
Subject: import winsup-2000-02-17 snapshot

---
 winsup/cygwin/delqueue.cc | 99 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 winsup/cygwin/delqueue.cc

(limited to 'winsup/cygwin/delqueue.cc')

diff --git a/winsup/cygwin/delqueue.cc b/winsup/cygwin/delqueue.cc
new file mode 100644
index 0000000..81d2bd6
--- /dev/null
+++ b/winsup/cygwin/delqueue.cc
@@ -0,0 +1,99 @@
+/* delqueue.cc
+
+   Copyright 1996, 1998 Cygnus Solutions.
+
+This file is part of Cygwin.
+
+This software is a copyrighted work licensed under the terms of the
+Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
+details. */
+
+#include "winsup.h"
+
+/* FIXME: this delqueue module is very flawed and should be rewritten.
+	First, having an array of a fixed size for keeping track of the
+	unlinked but not yet deleted files is bad.  Second, some programs
+	will unlink files and then create a new one in the same location
+	and this behavior is not supported in the current code.  Probably
+	we should find a move/rename function that will work on open files,
+	and move delqueue files to some special location or some such
+	hack... */
+
+void
+delqueue_list::init ()
+{
+  empty = 1;
+  memset(inuse, 0, MAX_DELQUEUES_PENDING);
+}
+
+void
+delqueue_list::queue_file (const char *dosname)
+{
+  char temp[MAX_PATH], *end;
+  GetFullPathName (dosname, sizeof (temp), temp, &end);
+
+  /* Note about race conditions: The only time we get to this point is
+     when a delete fails because someone's holding the descriptor open.
+     In those cases, other programs will be unable to delete the file
+     also, so any entries referring to that file will not be removed
+     from the queue while we're here. */
+
+  if (!empty)
+  {
+    /* check for duplicates */
+    for (int i=0; i < MAX_DELQUEUES_PENDING; i++)
+      if (inuse[i] && strcmp(name[i], temp) == 0)
+	return;
+  }
+
+  for (int i = 0; i < MAX_DELQUEUES_PENDING; i++)
+    if (!inuse[i])
+      {
+	/* set the name first, in case someone else is running the
+	   queue they'll get a valid name */
+	strcpy(name[i], temp);
+	inuse[i] = 1;
+	empty = 0;
+	return;
+      }
+
+  system_printf ("Out of queue slots");
+}
+
+void
+delqueue_list::process_queue ()
+{
+  if (empty)
+    return;
+  /* We set empty to 1 here, rather than later, to avoid a race
+     condition - some other program might queue up a file while we're
+     processing, and it will zero out empty also. */
+  empty = 1; /* but might get set to zero again, below */
+
+  syscall_printf ("Running delqueue");
+
+  for (int i = 0; i < MAX_DELQUEUES_PENDING; i++)
+    if (inuse[i])
+      {
+	if (DeleteFileA (name[i]))
+	  {
+	    syscall_printf ("Deleted %s", name[i]);
+	    inuse[i] = 0;
+	  }
+	else
+	  {
+	    int res = GetLastError ();
+	    empty = 0;
+	    if (res == ERROR_SHARING_VIOLATION)
+	      {
+		/* File still inuse, that's ok */
+		syscall_printf ("Still using %s", name[i]);
+	      }
+	    else
+	      {
+		syscall_printf ("Hmm, don't know what to do with '%s', %E", name[i]);
+	        inuse[i] = 0;
+	      }
+	  }
+      }
+}
-- 
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