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b8d757732f
Include config.h first, then system includes, then libguile includes, in alphabetical order, then the include for the file in question.
142 lines
3.2 KiB
C
142 lines
3.2 KiB
C
/* Copyright (C) 1995-1996,1998-2001,2003-2004,2006,2008,2010-2012,2018
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* 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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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <assert.h>
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#include "boolean.h"
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#include "dynstack.h"
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#include "eval.h"
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#include "pairs.h"
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#include "ports.h"
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#include "threads.h"
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#include "variable.h"
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#include "dynwind.h"
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SCM
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scm_dynamic_wind (SCM in_guard, SCM thunk, SCM out_guard)
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#define FUNC_NAME "dynamic-wind"
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{
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SCM ans;
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scm_i_thread *thread = SCM_I_CURRENT_THREAD;
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SCM_ASSERT (scm_is_true (scm_thunk_p (out_guard)), out_guard,
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SCM_ARG3, FUNC_NAME);
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scm_call_0 (in_guard);
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scm_dynstack_push_dynwind (&thread->dynstack, in_guard, out_guard);
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ans = scm_call_0 (thunk);
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scm_dynstack_pop (&thread->dynstack);
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scm_call_0 (out_guard);
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return ans;
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}
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#undef FUNC_NAME
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void
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scm_dynwind_begin (scm_t_dynwind_flags flags)
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{
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scm_i_thread *thread = SCM_I_CURRENT_THREAD;
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scm_dynstack_push_frame (&thread->dynstack, flags);
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}
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void
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scm_dynwind_end (void)
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{
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scm_dynstack_unwind_frame (&SCM_I_CURRENT_THREAD->dynstack);
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}
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void
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scm_dynwind_unwind_handler (void (*proc) (void *), void *data,
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scm_t_wind_flags flags)
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{
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scm_i_thread *thread = SCM_I_CURRENT_THREAD;
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scm_t_dynstack *dynstack = &thread->dynstack;
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scm_dynstack_push_unwinder (dynstack, flags, proc, data);
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}
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void
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scm_dynwind_rewind_handler (void (*proc) (void *), void *data,
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scm_t_wind_flags flags)
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{
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scm_i_thread *thread = SCM_I_CURRENT_THREAD;
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scm_t_dynstack *dynstack = &thread->dynstack;
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scm_dynstack_push_rewinder (dynstack, 0, proc, data);
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if (flags & SCM_F_WIND_EXPLICITLY)
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proc (data);
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}
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void
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scm_dynwind_unwind_handler_with_scm (void (*proc) (SCM), SCM data,
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scm_t_wind_flags flags)
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{
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/* FIXME: This is not a safe cast. */
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scm_dynwind_unwind_handler ((scm_t_guard) proc, SCM2PTR (data), flags);
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}
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void
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scm_dynwind_rewind_handler_with_scm (void (*proc) (SCM), SCM data,
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scm_t_wind_flags flags)
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{
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/* FIXME: This is not a safe cast. */
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scm_dynwind_rewind_handler ((scm_t_guard) proc, SCM2PTR (data), flags);
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}
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void
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scm_dynwind_free (void *mem)
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{
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scm_dynwind_unwind_handler (free, mem, SCM_F_WIND_EXPLICITLY);
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}
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void
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scm_swap_bindings (SCM vars, SCM vals)
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{
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SCM tmp;
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while (scm_is_pair (vals))
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{
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tmp = SCM_VARIABLE_REF (SCM_CAR (vars));
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SCM_VARIABLE_SET (SCM_CAR (vars), SCM_CAR (vals));
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SCM_SETCAR (vals, tmp);
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vars = SCM_CDR (vars);
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vals = SCM_CDR (vals);
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}
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}
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void
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scm_init_dynwind ()
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{
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#include "dynwind.x"
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}
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