6 /* Copyright (C) 1995,1996,1998,1999,2000,2001,2002,2003,2004,2008,2009
7 * Free Software Foundation, Inc.
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.
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.
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
27 #include "libguile/__scm.h"
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
44 SCM_API scm_t_bits scm_tc16_promise
;
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
);
52 SCM_INTERNAL
void scm_init_promises (void);
55 #endif /* SCM_PROMISES_H */