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* libguile/fluids.c (scm_make_unbound_fluid): Rename from scm_make_undefined_fluid. * libguile/fluids.h: * module/language/elisp/runtime.scm: Update referrers.
111 lines
4.3 KiB
C
111 lines
4.3 KiB
C
/* classes: h_files */
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#ifndef SCM_FLUIDS_H
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#define SCM_FLUIDS_H
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/* Copyright (C) 1996,2000,2001, 2006, 2008, 2009, 2010 Free Software Foundation, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 3 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#include "libguile/__scm.h"
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#include "libguile/root.h"
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#include "libguile/vectors.h"
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/* These "with-fluids" objects live on the dynamic stack, and record previous
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values of fluids. Guile uses shallow binding, so the current fluid values are
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always in the same place for a given thread, in the dynamic-state vector.
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*/
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#define SCM_WITH_FLUIDS_P(x) (!SCM_IMP (x) && SCM_TYP7(x) == scm_tc7_with_fluids)
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#define SCM_WITH_FLUIDS_LEN(x) (SCM_CELL_WORD ((x), 0) >> 8)
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#define SCM_WITH_FLUIDS_NTH_FLUID(x,n) (SCM_CELL_OBJECT ((x), 1 + (n)*2))
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#define SCM_WITH_FLUIDS_NTH_VAL(x,n) (SCM_CELL_OBJECT ((x), 2 + (n)*2))
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#define SCM_WITH_FLUIDS_SET_NTH_VAL(x,n,v) (SCM_SET_CELL_OBJECT ((x), 2 + (n)*2, (v)))
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/* Fluids.
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Fluids are objects of a certain type that can hold one SCM value per
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dynamic state. That is, modifications to this value are only visible
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to code that executes with the same dynamic state as the modifying
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code. When a new dynamic state is constructed, it inherits the
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values from its parent. Because each thread executes with its own
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dynamic state, you can use fluids for thread local storage.
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Each fluid is identified by a small integer. This integer is used to
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index a vector that holds the values of all fluids. A dynamic state
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consists of this vector, wrapped in an object so that the vector can
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grow.
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*/
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#define SCM_FLUID_P(x) (!SCM_IMP (x) && SCM_TYP7 (x) == scm_tc7_fluid)
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#ifdef BUILDING_LIBGUILE
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#define SCM_I_FLUID_NUM(x) ((size_t)SCM_CELL_WORD_1(x))
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#endif
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SCM_API SCM scm_make_fluid (void);
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SCM_API SCM scm_make_unbound_fluid (void);
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SCM_API int scm_is_fluid (SCM obj);
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SCM_API SCM scm_fluid_p (SCM fl);
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SCM_API SCM scm_fluid_ref (SCM fluid);
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SCM_API SCM scm_fluid_set_x (SCM fluid, SCM value);
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SCM_API SCM scm_fluid_unset_x (SCM fluid);
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SCM_API SCM scm_fluid_bound_p (SCM fluid);
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SCM_INTERNAL SCM scm_i_make_with_fluids (size_t n, SCM *fluids, SCM *vals);
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SCM_INTERNAL void scm_i_swap_with_fluids (SCM with_fluids, SCM dynamic_state);
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SCM_API SCM scm_c_with_fluids (SCM fluids, SCM vals,
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SCM (*cproc)(void *), void *cdata);
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SCM_API SCM scm_c_with_fluid (SCM fluid, SCM val,
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SCM (*cproc)(void *), void *cdata);
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SCM_API SCM scm_with_fluids (SCM fluids, SCM vals, SCM thunk);
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SCM_API SCM scm_with_fluid (SCM fluid, SCM val, SCM thunk);
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SCM_API void scm_dynwind_fluid (SCM fluid, SCM value);
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#ifdef BUILDING_LIBGUILE
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#define SCM_I_DYNAMIC_STATE_P(x) (!SCM_IMP (x) && SCM_TYP7 (x) == scm_tc7_dynamic_state)
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#define SCM_I_DYNAMIC_STATE_FLUIDS(x) SCM_PACK (SCM_CELL_WORD_1 (x))
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#endif
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SCM_API SCM scm_make_dynamic_state (SCM parent);
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SCM_API SCM scm_dynamic_state_p (SCM obj);
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SCM_API int scm_is_dynamic_state (SCM obj);
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SCM_API SCM scm_current_dynamic_state (void);
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SCM_API SCM scm_set_current_dynamic_state (SCM state);
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SCM_API void scm_dynwind_current_dynamic_state (SCM state);
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SCM_API void *scm_c_with_dynamic_state (SCM state,
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void *(*func)(void *), void *data);
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SCM_API SCM scm_with_dynamic_state (SCM state, SCM proc);
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SCM_INTERNAL SCM scm_i_make_initial_dynamic_state (void);
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SCM_INTERNAL void scm_i_fluid_print (SCM exp, SCM port, scm_print_state *pstate);
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SCM_INTERNAL void scm_i_dynamic_state_print (SCM exp, SCM port, scm_print_state *pstate);
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SCM_INTERNAL void scm_i_with_fluids_print (SCM exp, SCM port, scm_print_state *pstate);
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SCM_INTERNAL void scm_init_fluids (void);
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#endif /* SCM_FLUIDS_H */
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/*
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Local Variables:
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c-file-style: "gnu"
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End:
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*/
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