libguile/promises.h

   1 /* classes: h_files */
   2
   3 #ifndef SCM_PROMISES_H
   4 #define SCM_PROMISES_H
   5
   6 /* Copyright (C) 1995,1996,1998,1999,2000,2001,2002,2003,2004,2008,2009
   7  * Free Software Foundation, Inc.
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public License
  11  * as published by the Free Software Foundation; either version 3 of
  12  * the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  22  * 02110-1301 USA
  23  */
  24
  25 \f
  26
  27 #include "libguile/__scm.h"
  28
  29 \f
  30
  31 /* {Promises}
  32  */
  33
  34 #define SCM_F_PROMISE_COMPUTED (1L << 0)
  35 #define SCM_PROMISE_COMPUTED_P(promise) \
  36   (SCM_F_PROMISE_COMPUTED & SCM_SMOB_FLAGS (promise))
  37 #define SCM_SET_PROMISE_COMPUTED(promise) \
  38   SCM_SET_SMOB_FLAGS ((promise), SCM_F_PROMISE_COMPUTED)
  39 #define SCM_PROMISE_MUTEX     SCM_SMOB_OBJECT_2
  40 #define SCM_PROMISE_DATA      SCM_SMOB_OBJECT
  41 #define SCM_SET_PROMISE_DATA  SCM_SET_SMOB_OBJECT
  42
  43
  44 SCM_API scm_t_bits scm_tc16_promise;
  45
  46 \f
  47
  48 SCM_API SCM scm_make_promise (SCM thunk);
  49 SCM_API SCM scm_force (SCM x);
  50 SCM_API SCM scm_promise_p (SCM x);
  51
  52 SCM_INTERNAL void scm_init_promises (void);
  53
  54
  55 #endif  /* SCM_PROMISES_H */
  56
  57 /*
  58   Local Variables:
  59   c-file-style: "gnu"
  60   End:
  61 */