"Return the current module.")
#define FUNC_NAME s_scm_current_module
{
- SCM curr = scm_fluid_ref (the_module);
-
- return scm_is_true (curr) ? curr : scm_the_root_module ();
+ if (scm_module_system_booted_p)
+ return scm_fluid_ref (the_module);
+ else
+ return SCM_BOOL_F;
}
#undef FUNC_NAME
}
-/* Environments */
-
-SCM_SYMBOL (sym_module, "module");
-
-SCM
-scm_lookup_closure_module (SCM proc)
-{
- if (scm_is_false (proc))
- return scm_the_root_module ();
- else if (SCM_EVAL_CLOSURE_P (proc))
- return SCM_PACK (SCM_SMOB_DATA (proc));
- else
- {
- SCM mod;
-
- /* FIXME: The `module' property is no longer set on eval closures, as it
- introduced a circular reference that precludes garbage collection of
- modules with the current weak hash table semantics (see
- http://lists.gnu.org/archive/html/guile-devel/2009-01/msg00102.html and
- http://thread.gmane.org/gmane.comp.programming.garbage-collection.boehmgc/2465
- for details). Since it doesn't appear to be used (only in this
- function, which has 1 caller), we no longer extend
- `set-module-eval-closure!' to set the `module' property. */
- abort ();
-
- mod = scm_procedure_property (proc, sym_module);
- if (scm_is_false (mod))
- mod = scm_the_root_module ();
- return mod;
- }
-}
-
/*
* C level implementation of the standard eval closure
*
}
#undef FUNC_NAME
-scm_t_bits scm_tc16_eval_closure;
-
-#define SCM_F_EVAL_CLOSURE_INTERFACE (1<<0)
-#define SCM_EVAL_CLOSURE_INTERFACE_P(e) \
- (SCM_SMOB_FLAGS (e) & SCM_F_EVAL_CLOSURE_INTERFACE)
-
-/* NOTE: This function may be called by a smob application
- or from another C function directly. */
SCM
-scm_eval_closure_lookup (SCM eclo, SCM sym, SCM definep)
+scm_module_ensure_local_variable (SCM module, SCM sym)
+#define FUNC_NAME "module-ensure-local-variable"
{
- SCM module = SCM_PACK (SCM_SMOB_DATA (eclo));
- if (scm_is_true (definep))
+ if (SCM_LIKELY (scm_module_system_booted_p))
{
- if (SCM_EVAL_CLOSURE_INTERFACE_P (eclo))
- return SCM_BOOL_F;
+ SCM_VALIDATE_MODULE (1, module);
+ SCM_VALIDATE_SYMBOL (2, sym);
+
return scm_call_2 (SCM_VARIABLE_REF (module_make_local_var_x_var),
- module, sym);
+ module, sym);
}
- else
- return scm_module_variable (module, sym);
-}
-SCM_DEFINE (scm_standard_eval_closure, "standard-eval-closure", 1, 0, 0,
- (SCM module),
- "Return an eval closure for the module @var{module}.")
-#define FUNC_NAME s_scm_standard_eval_closure
-{
- SCM_RETURN_NEWSMOB (scm_tc16_eval_closure, SCM_UNPACK (module));
-}
-#undef FUNC_NAME
+ {
+ SCM handle, var;
+ handle = scm_hashq_create_handle_x (scm_pre_modules_obarray,
+ sym, SCM_BOOL_F);
+ var = SCM_CDR (handle);
-SCM_DEFINE (scm_standard_interface_eval_closure,
- "standard-interface-eval-closure", 1, 0, 0,
- (SCM module),
- "Return a interface eval closure for the module @var{module}. "
- "Such a closure does not allow new bindings to be added.")
-#define FUNC_NAME s_scm_standard_interface_eval_closure
-{
- SCM_RETURN_NEWSMOB (scm_tc16_eval_closure | (SCM_F_EVAL_CLOSURE_INTERFACE<<16),
- SCM_UNPACK (module));
-}
-#undef FUNC_NAME
+ if (scm_is_false (var))
+ {
+ var = scm_make_variable (SCM_UNDEFINED);
+ SCM_SETCDR (handle, var);
+ }
-SCM_DEFINE (scm_eval_closure_module,
- "eval-closure-module", 1, 0, 0,
- (SCM eval_closure),
- "Return the module associated with this eval closure.")
-/* the idea is that eval closures are really not the way to do things, they're
- superfluous given our module system. this function lets mmacros migrate away
- from eval closures. */
-#define FUNC_NAME s_scm_eval_closure_module
-{
- SCM_MAKE_VALIDATE_MSG (SCM_ARG1, eval_closure, EVAL_CLOSURE_P,
- "eval-closure");
- return SCM_SMOB_OBJECT (eval_closure);
+ return var;
+ }
}
#undef FUNC_NAME
-SCM
-scm_module_lookup_closure (SCM module)
-{
- if (scm_is_false (module))
- return SCM_BOOL_F;
- else
- return SCM_MODULE_EVAL_CLOSURE (module);
-}
-
-SCM
-scm_current_module_lookup_closure ()
-{
- if (scm_module_system_booted_p)
- return scm_module_lookup_closure (scm_current_module ());
- else
- return SCM_BOOL_F;
-}
-
SCM_SYMBOL (sym_macroexpand, "macroexpand");
SCM_DEFINE (scm_module_transformer, "module-transformer", 1, 0, 0,
return scm_call_1 (SCM_VARIABLE_REF (module_public_interface_var), module);
}
-/* scm_sym2var
- *
- * looks up the variable bound to SYM according to PROC. PROC should be
- * a `eval closure' of some module.
- *
- * When no binding exists, and DEFINEP is true, create a new binding
- * with a initial value of SCM_UNDEFINED. Return `#f' when DEFINEP as
- * false and no binding exists.
- *
- * When PROC is `#f', it is ignored and the binding is searched for in
- * the scm_pre_modules_obarray (a `eq' hash table).
- */
-
-SCM
-scm_sym2var (SCM sym, SCM proc, SCM definep)
-#define FUNC_NAME "scm_sym2var"
-{
- SCM var;
-
- if (SCM_HEAP_OBJECT_P (proc))
- {
- if (SCM_EVAL_CLOSURE_P (proc))
- {
- /* Bypass evaluator in the standard case. */
- var = scm_eval_closure_lookup (proc, sym, definep);
- }
- else
- var = scm_call_2 (proc, sym, definep);
- }
- else
- {
- SCM handle;
-
- if (scm_is_false (definep))
- var = scm_hashq_ref (scm_pre_modules_obarray, sym, SCM_BOOL_F);
- else
- {
- handle = scm_hashq_create_handle_x (scm_pre_modules_obarray,
- sym, SCM_BOOL_F);
- var = SCM_CDR (handle);
- if (scm_is_false (var))
- {
- var = scm_make_variable (SCM_UNDEFINED);
- SCM_SETCDR (handle, var);
- }
- }
- }
-
- if (scm_is_true (var) && !SCM_VARIABLEP (var))
- SCM_MISC_ERROR ("~S is not bound to a variable", scm_list_1 (sym));
-
- return var;
-}
-#undef FUNC_NAME
-
SCM
scm_c_module_lookup (SCM module, const char *name)
{
#define FUNC_NAME "module-lookup"
{
SCM var;
- SCM_VALIDATE_MODULE (1, module);
-
- var = scm_sym2var (sym, scm_module_lookup_closure (module), SCM_BOOL_F);
+ var = scm_module_variable (module, sym);
if (scm_is_false (var))
unbound_variable (FUNC_NAME, sym);
return var;
SCM
scm_lookup (SCM sym)
{
- SCM var =
- scm_sym2var (sym, scm_current_module_lookup_closure (), SCM_BOOL_F);
- if (scm_is_false (var))
- unbound_variable (NULL, sym);
- return var;
+ return scm_module_lookup (scm_current_module (), sym);
}
SCM
#define FUNC_NAME "module-define"
{
SCM var;
- SCM_VALIDATE_MODULE (1, module);
- var = scm_sym2var (sym, scm_module_lookup_closure (module), SCM_BOOL_T);
+ var = scm_module_ensure_local_variable (module, sym);
SCM_VARIABLE_SET (var, value);
+
return var;
}
#undef FUNC_NAME
"not a macro.")
#define FUNC_NAME s_scm_define
{
- SCM var;
SCM_VALIDATE_SYMBOL (SCM_ARG1, sym);
- var = scm_sym2var (sym, scm_current_module_lookup_closure (), SCM_BOOL_T);
- SCM_VARIABLE_SET (var, value);
- return var;
+
+ return scm_module_define (scm_current_module (), sym, value);
}
#undef FUNC_NAME
#include "libguile/modules.x"
module_make_local_var_x_var = scm_c_define ("module-make-local-var!",
SCM_UNDEFINED);
- scm_tc16_eval_closure = scm_make_smob_type ("eval-closure", 0);
- scm_set_smob_apply (scm_tc16_eval_closure, scm_eval_closure_lookup, 2, 0, 0);
-
the_module = scm_make_fluid ();
}
HCoop / bpt / guile.git / blobdiff