mirror of
https://git.savannah.gnu.org/git/guile.git
synced 2025-04-30 03:40:34 +02:00
fbb857a472
Conflicts: lib/Makefile.am libguile/Makefile.am libguile/frames.c libguile/gc-card.c libguile/gc-freelist.c libguile/gc-mark.c libguile/gc-segment.c libguile/gc_os_dep.c libguile/load.c libguile/macros.c libguile/objcodes.c libguile/programs.c libguile/strings.c libguile/vm.c m4/gnulib-cache.m4 m4/gnulib-comp.m4 m4/inline.m4
90 lines
3.2 KiB
C
90 lines
3.2 KiB
C
/* classes: h_files */
|
||
|
||
#ifndef SCM_FLUIDS_H
|
||
#define SCM_FLUIDS_H
|
||
|
||
/* Copyright (C) 1996,2000,2001, 2006, 2008 Free Software Foundation, Inc.
|
||
*
|
||
* This library is free software; you can redistribute it and/or
|
||
* modify it under the terms of the GNU Lesser General Public License
|
||
* as published by the Free Software Foundation; either version 3 of
|
||
* the License, or (at your option) any later version.
|
||
*
|
||
* This library is distributed in the hope that it will be useful, but
|
||
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
* Lesser General Public License for more details.
|
||
*
|
||
* You should have received a copy of the GNU Lesser General Public
|
||
* License along with this library; if not, write to the Free Software
|
||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
||
* 02110-1301 USA
|
||
*/
|
||
|
||
|
||
|
||
#include "libguile/__scm.h"
|
||
#include "libguile/root.h"
|
||
#include "libguile/vectors.h"
|
||
|
||
/* Fluids.
|
||
|
||
Fluids are objects of a certain type (a smob) that can hold one SCM
|
||
value per dynamic state. That is, modifications to this value are
|
||
only visible to code that executes with the same dynamic state as
|
||
the modifying code. When a new dynamic state is constructed, it
|
||
inherits the values from its parent. Because each thread executes
|
||
with its own dynamic state, you can use fluids for thread local
|
||
storage.
|
||
|
||
Each fluid is identified by a small integer. This integer is used
|
||
to index a vector that holds the values of all fluids. A dynamic
|
||
state consists of this vector, wrapped in a smob so that the vector
|
||
can grow.
|
||
*/
|
||
|
||
/* The fastest way to acces/modify the value of a fluid. These macros
|
||
do no error checking at all. The first argument is the index
|
||
number of the fluid, obtained via SCM_FLUID_NUM, not the fluid
|
||
itself. You must make sure that the fluid remains protected as
|
||
long you use its number since numbers of unused fluids are reused
|
||
eventually.
|
||
*/
|
||
|
||
SCM_API SCM scm_make_fluid (void);
|
||
SCM_API int scm_is_fluid (SCM obj);
|
||
SCM_API SCM scm_fluid_p (SCM fl);
|
||
SCM_API SCM scm_fluid_ref (SCM fluid);
|
||
SCM_API SCM scm_fluid_set_x (SCM fluid, SCM value);
|
||
|
||
SCM_API SCM scm_c_with_fluids (SCM fluids, SCM vals,
|
||
SCM (*cproc)(void *), void *cdata);
|
||
SCM_API SCM scm_c_with_fluid (SCM fluid, SCM val,
|
||
SCM (*cproc)(void *), void *cdata);
|
||
SCM_API SCM scm_with_fluids (SCM fluids, SCM vals, SCM thunk);
|
||
SCM_API SCM scm_with_fluid (SCM fluid, SCM val, SCM thunk);
|
||
|
||
SCM_API void scm_dynwind_fluid (SCM fluid, SCM value);
|
||
|
||
SCM_API SCM scm_make_dynamic_state (SCM parent);
|
||
SCM_API SCM scm_dynamic_state_p (SCM obj);
|
||
SCM_API int scm_is_dynamic_state (SCM obj);
|
||
SCM_API SCM scm_current_dynamic_state (void);
|
||
SCM_API SCM scm_set_current_dynamic_state (SCM state);
|
||
SCM_API void scm_dynwind_current_dynamic_state (SCM state);
|
||
SCM_API void *scm_c_with_dynamic_state (SCM state,
|
||
void *(*func)(void *), void *data);
|
||
SCM_API SCM scm_with_dynamic_state (SCM state, SCM proc);
|
||
|
||
SCM_INTERNAL SCM scm_i_make_initial_dynamic_state (void);
|
||
|
||
SCM_INTERNAL void scm_fluids_prehistory (void);
|
||
SCM_INTERNAL void scm_init_fluids (void);
|
||
|
||
#endif /* SCM_FLUIDS_H */
|
||
|
||
/*
|
||
Local Variables:
|
||
c-file-style: "gnu"
|
||
End:
|
||
*/
|