Add '#include "cygwait.h"' throughout, where appropriate.

* DevNotes: Add entry cgf-000012.
* Makefile.in (DLL_OFILES): Add cygwait.o.
* sigproc.h: Remove cygwait definitions.
* cygwait.h: New file.  Define/declare Cygwin waitfor functions.
* cygwait.cc: Ditto.
* exceptions.cc: Include cygwait.h.
(handle_sigsuspend): Accommodate change in cancelable_wait arguments.
(sigpacket::process): Display thread tls in debugging output.
* fhandler.cc (fhandler_base_overlapped::wait_overlapped): Use symbolic names
for signal and cancel return.
* fhandler_console.cc (fhandler_console::read): Ditto.
(fhandler_dev_dsp::Audio_out::waitforspace): Ditto.
fhandler_dev_dsp::Audio_in::waitfordata): Ditto.
* fhandler_fifo.cc (fhandler_fifo::wait): Ditto.
* fhandler_serial.cc (fhandler_serial::raw_read): Ditto.
* fhandler_tty.cc (fhandler_pty_slave::read): Ditto.
* select.cc (cygwin_select): Ditto.
* wait.cc (wait4): Ditto.
* thread.cc (cancelable_wait): Move definition to cygwait.h.
(pthread_cond::wait): Accommodate change in cancelable_wait arguments.
(pthread_mutex::lock): Ditto.
(pthread_spinlock::lock): Ditto.
(pthread::join): Ditto.
(pthread::thread_init_wrapper): Display tls in debugging output.
(semaphore::_timedwait): Ditto.
* thread.h (cw_sig_wait): Move to cygwait.h.
(cw_cancel_action): Delete.
(cancelable_wait): Move declaration to cygwait.h.

winsup/cygwin/cygwait.h

@@ -0,0 +1,47 @@
+/* cygwait.h
+
+   Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
+   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.  */
+
+#pragma once
+
+enum cw_wait_mask
+{
+  cw_cancel =		0x0001,
+  cw_cancel_self =	0x0002,
+  cw_sig =		0x0004,
+  cw_sig_eintr =	0x0008
+};
+
+const unsigned cw_std_mask = cw_cancel | cw_cancel_self | cw_sig;
+
+DWORD cancelable_wait (HANDLE, PLARGE_INTEGER timeout = NULL,
+		       unsigned = cw_std_mask)
+  __attribute__ ((regparm (3)));
+
+static inline DWORD __attribute__ ((always_inline))
+cygwait (HANDLE h, DWORD howlong = INFINITE)
+{
+  PLARGE_INTEGER pli_howlong;
+  LARGE_INTEGER li_howlong;
+  if (howlong == INFINITE)
+    pli_howlong = NULL;
+  else
+    {
+      li_howlong.QuadPart = 10000ULL * howlong;
+      pli_howlong = &li_howlong;
+    }
+  return cancelable_wait (h, pli_howlong, cw_cancel | cw_sig_eintr);
+}
+
+static inline DWORD __attribute__ ((always_inline))
+cygwait (DWORD howlong)
+{
+  return cygwait ((HANDLE) NULL, howlong);
+}