(***********************************************************************)
(*                                                                     *)
(*                         Applied Type System                         *)
(*                                                                     *)
(*                              Hongwei Xi                             *)
(*                                                                     *)
(***********************************************************************)

(*
 * ATS - Unleashing the Power of Types!
 *
 * Copyright (C) 2002-2008 Hongwei Xi, Boston University
 *
 * All rights reserved
 *
 * ATS is free software;  you can  redistribute it and/or modify it under
 * the  terms of the  GNU General Public License as published by the Free
 * Software Foundation; either version 2.1, or (at your option) any later
 * version.
 * 
 * ATS is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without  even  the  implied  warranty  of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the  GNU General Public License
 * for more details.
 * 
 * You  should  have  received  a  copy of the GNU General Public License
 * along  with  ATS;  see the  file COPYING.  If not, please write to the
 * Free Software Foundation,  51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 *
 *)

(* ****** ****** *)

(* author: Hongwei Xi (hwxi AT cs DOT bu DOT edu) *)

(* ****** ****** *)

// linear upload lock
absviewtype uplock_view_viewtype (int, v:view)
stadef uplock = uplock_view_viewtype

absviewtype uplockopt_view_viewtype (int, v:view)
stadef uplockopt = uplockopt_view_viewtype

absviewtype upticket_view_viewtype (v:view)
stadef upticket = upticket_view_viewtype

(* ****** ****** *)

fun pthread_uplockopt_unnone
  {v:view} (lockopt: uplockopt (0, v)): void
  = "atslib_pthread_uplockopt_unnone"

fun pthread_uplockopt_unsome
  {v:view} (lockopt: uplockopt (1, v)): uplock (1, v)
  = "atslib_pthread_uplockopt_unsome"

fun pthread_uplockopt_is_none {v:view}
  {i:two} (lockopt: !uplockopt (i, v)): bool (i==0)
  = "atslib_pthread_uplockopt_is_none"

fun pthread_uplockopt_is_some {v:view}
  {i:two} (lockopt: !uplockopt (i, v)): bool (i==1)
  = "atslib_pthread_uplockopt_is_some"

(* ****** ****** *)

fun pthread_uplock_create {v:view} (): uplock (0, v)
  = "atslib_pthread_uplock_create"

fun pthread_upticket_create
  {v:view} (lock: !uplock (0, v) >> uplock (1, v)): upticket (v)
  = "atslib_pthread_upticket_create"

fun pthread_upticket_upload_and_destroy
  {v:view} (pf: v | ticket: upticket v): void
  = "atslib_pthread_upticket_upload_and_destroy"

(* ****** ****** *)

fun pthread_uplock_download
  {v:view} (lock: uplock (1, v)): @(v | void)
  = "atslib_pthread_uplock_download"

fun pthread_uplock_download_try {v:view}
  (lock: uplock (1, v)): [i:two] (option_v (v, i==0) | uplockopt (i, v))
  = "atslib_pthread_uplock_download_try"

(* ****** ****** *)

(* end of [pthread.sats] *)