1 files changed, 0 insertions, 80 deletions
diff --git a/winsup/cygwin/spinlock.h b/winsup/cygwin/spinlock.h
deleted file mode 100644
index b55817245..000000000
--- a/winsup/cygwin/spinlock.h
+++ /dev/null
@@ -1,80 +0,0 @@
-/* spinlock.h: Header file for cygwin time-sensitive synchronization primitive.
-
-   Copyright 2010 Red Hat, Inc.
-
-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. */
-
-#ifndef _SPINLOCK_H
-#define _SPINLOCK_H
-
-#include "ntdll.h"
-
-#define SPINLOCK_WAIT (15000LL * 10000LL)
-
-class spinlock
-{
-  LONG *locker;
-  LONG val;
-  LONG setto;
-  void done (LONG what)
-  {
-    if (locker)
-      {
-	InterlockedExchange (locker, what);
-	locker = NULL;
-      }
-  }
-  long long time ()
-  {
-    LARGE_INTEGER t;
-    if (NtQuerySystemTime (&t) == STATUS_SUCCESS)
-      return get_ll (t);
-    return 0LL;
-  }
-public:
-  spinlock (LONG& locktest, LONG wanted_val = 1, LONGLONG timeout = SPINLOCK_WAIT):
-    locker (&locktest), setto (wanted_val)
-  {
-    /* Quick test to see if we're already initialized */
-    if ((val = locktest) == wanted_val)
-      locker = NULL;
-    /* Slightly less quick test to see if we are the first cygwin process */
-    else if ((val = InterlockedExchange (locker, -1)) == 0)
-      /* We're armed and dangerous */;
-    else if (val == wanted_val)
-      done (val);	/* This was initialized while we weren't looking */
-    else
-      {
-	long long then = time ();
-	/* Loop waiting for some other process to set locktest to something
-	   other than -1, indicating that initialization has finished.  Or,
-	   wait a default of 15 seconds for that to happen and, if it doesn't
-	   just grab the lock ourselves. */
-	while ((val = InterlockedExchange (locker, -1)) == -1
-	       && (time () - then) < timeout)
-	  yield ();
-	/* Reset the lock back to wanted_value under the assumption that is
-	   what caused the above loop to kick out.  */
-	if (val == -1)
-	  val = 0;	/* Timed out.  We'll initialize things ourselves. */
-	else
-	  done (val);	/* Put back whatever was there before, assuming that
-			   it is actually wanted_val. */
-      }
-  }
-  ~spinlock () {done (setto);}
-  operator LONG () const {return val;}
-  /* FIXME: This should be handled in a more general fashion, probably by
-     establishing a linked list of spinlocks which are freed on process exit. */
-  void multiple_cygwin_problem (const char *w, unsigned m, unsigned v)
-  {
-    done (val);
-    ::multiple_cygwin_problem (w, m, v);
-  }
-};
-
-#endif /*_SPINLOCK_H*/