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fb8c91a35c
* libguile/fluids.h (struct scm_dynamic_state): Add thread_local_values
table. Thread locals are flushed to a separate thread-local table.
The references are strong references since the table never escapes the
thread.
(scm_make_thread_local_fluid, scm_fluid_thread_local_p): New
functions.
* libguile/fluids.c (FLUID_F_THREAD_LOCAL):
(SCM_I_FLUID_THREAD_LOCAL_P): New macros.
(restore_dynamic_state): Add comment about precondition.
(save_dynamic_state): Flush thread locals.
(scm_i_fluid_print): Print thread locals nicely.
(new_fluid): Add flags arg.
(scm_make_fluid, scm_make_fluid_with_default, scm_make_unbound_fluid):
Adapt.
(scm_make_thread_local_fluid, scm_fluid_thread_local_p): New
functions.
(fluid_set_x): Special flushing logic for thread-locals.
(fluid_ref): Special cache miss logic for thread locals.
* libguile/stacks.c (scm_init_stacks):
* libguile/throw.c (scm_init_throw): %stacks and %exception-handler are
thread-locals.
* libguile/threads.c (guilify_self_2): Init thread locals table.
* test-suite/tests/fluids.test ("dynamic states"): Add test.
* doc/ref/api-control.texi (Fluids and Dynamic States): Add link to
Thread-Local Variables.
* doc/ref/api-scheduling.texi (Thread Local Variables): Update with real
thread-locals.
* NEWS: Update.
101 lines
3.5 KiB
C
101 lines
3.5 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, 2011, 2012, 2013 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/vectors.h"
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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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*/
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#define SCM_FLUID_P(x) (SCM_HAS_TYP7 (x, scm_tc7_fluid))
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#ifdef BUILDING_LIBGUILE
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# include <libguile/cache-internal.h>
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struct scm_dynamic_state
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{
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SCM thread_local_values;
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SCM values;
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uint8_t has_aliased_values;
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struct scm_cache cache;
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};
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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_fluid_with_default (SCM dflt);
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SCM_API SCM scm_make_unbound_fluid (void);
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SCM_API SCM scm_make_thread_local_fluid (SCM dflt);
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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_thread_local_p (SCM fluid);
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SCM_API SCM scm_fluid_ref (SCM fluid);
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SCM_API SCM scm_fluid_ref_star (SCM fluid, SCM depth);
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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 void scm_swap_fluid (SCM fluid, SCM value_box,
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scm_t_dynamic_state *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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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_dynamic_state_ref (SCM state, SCM fluid, SCM dflt);
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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_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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