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export `make-promise' to scheme

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* libguile/eval.h:
* libguile/eval.c (scm_make_promise): Rename from `scm_makprom', and
  export as the scheme procedure, `make-promise'.

* libguile/eval.i.c (CEVAL): s/makprom/make_promise/.
This commit is contained in:
Andy Wingo 2008-09-25 16:16:35 +02:00
parent 8ab3c80f8b
commit 7c455996e8
3 changed files with 15 additions and 5 deletions
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16
libguile/eval.c
View file

@ -3662,13 +3662,23 @@ scm_closure (SCM code, SCM env)
scm_t_bits scm_tc16_promise;
SCM
scm_makprom (SCM code)
SCM_DEFINE (scm_make_promise, "make-promise", 1, 0, 0,
(SCM thunk),
"Create a new promise object.\n\n"
"@code{make-promise} is a procedural form of @code{delay}.\n"
"These two expressions are equivalent:\n"
"@lisp\n"
"(delay @var{exp})\n"
"(make-promise (lambda () @var{exp}))\n"
"@end lisp\n")
#define FUNC_NAME s_scm_make_promise
{
SCM_VALIDATE_THUNK (1, thunk);
SCM_RETURN_NEWSMOB2 (scm_tc16_promise,
SCM_UNPACK (code),
SCM_UNPACK (thunk),
scm_make_recursive_mutex ());
}
#undef FUNC_NAME
static SCM
promise_mark (SCM promise)

2
libguile/eval.h
View file

@ -162,7 +162,7 @@ SCM_API SCM scm_dapply (SCM proc, SCM arg1, SCM args);
SCM_API SCM scm_map (SCM proc, SCM arg1, SCM args);
SCM_API SCM scm_for_each (SCM proc, SCM arg1, SCM args);
SCM_API SCM scm_closure (SCM code, SCM env);
SCM_API SCM scm_makprom (SCM code);
SCM_API SCM scm_make_promise (SCM thunk);
SCM_API SCM scm_force (SCM x);
SCM_API SCM scm_promise_p (SCM x);
SCM_API SCM scm_cons_source (SCM xorig, SCM x, SCM y);

2
libguile/eval.i.c
View file

@ -732,7 +732,7 @@ dispatch:
case (ISYMNUM (SCM_IM_DELAY)):
RETURN (scm_makprom (scm_closure (SCM_CDR (x), env)));
RETURN (scm_make_promise (scm_closure (SCM_CDR (x), env)));
#if 0
/* See futures.h for a comment why futures are not enabled.