mirror of
https://git.savannah.gnu.org/git/guile.git
synced 2025-05-03 05:20:16 +02:00
43e01b1ee3
scm_catch_with_pre_unwind_handler, scm_with_throw_handler): New. * throw.c (SCM_JBPREUNWIND, SCM_SETJBPREUNWIND): New. (struct pre_unwind_data): New, replaces struct lazy_catch. (scm_c_catch): New, replaces scm_internal_catch as the primary catch API for C code; adds pre-unwind handler support. (scm_internal_catch): Now just a wrapper for scm_c_catch, for back compatibility. (tc16_pre_unwind_data, pre_unwind_data_print, make_pre_unwind_data, SCM_PRE_UNWIND_DATA_P): Renamed from "lazy_catch" equivalents. (scm_c_with_throw_handler): New, replaces scm_internal_lazy_catch as the primary C API for a "lazy" catch. (scm_internal_lazy_catch): Now just a wrapper for scm_c_with_throw_handler, for back compatibility. (scm_catch_with_pre_unwind_handler): Renamed from scm_catch; adds pre-unwind handler support. (scm_catch): Now just a wrapper for scm_catch_with_pre_unwind_handler, for back compatibility. (scm_with_throw_handler): New. (scm_lazy_catch): Update comment to say that the handler can return, and what happens if it does. (toggle_pre_unwind_running): New. (scm_ithrow): When identifying the throw target, take running flags into account. In general, change naming of things from "lazy_catch" to "pre_unwind". When throwing to a throw handler, don't unwind the dynamic context first. Add dynwind framing to manage the running flag of a throw handler. If a lazy catch or throw handler returns, rethrow the same exception again. Add pre-unwind support to the normal catch case (SCM_JMPBUFP). * root.c (scm_internal_cwdr): Add NULL args to scm_i_with_continuation_barrier call. * dynwind.c: Change comment mentioning lazy-catch to mention pre-unwind data and throw handler also. * continuations.h (scm_i_with_continuation_barrier): Add pre-unwind handler args. * continuations.c (scm_i_with_continuation_barrier): Add pre-unwind handler args, and pass on to scm_c_catch (changed from scm_internal_catch). (c_handler): Remove scm_handle_by_message_noexit call. (scm_c_with_continuation_barrier): Call scm_i_with_continuation_barrier with scm_handle_by_message_noexit as the pre-unwind handler. (scm_handler): Remove scm_handle_by_message_noexit call. (s_scm_with_continuation_barrier): Call scm_i_with_continuation_barrier with scm_handle_by_message_noexit as the pre-unwind handler.
105 lines
3.2 KiB
C
105 lines
3.2 KiB
C
/* classes: h_files */
|
||
|
||
#ifndef SCM_THROW_H
|
||
#define SCM_THROW_H
|
||
|
||
/* Copyright (C) 1995,1996,1998,2000 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 2.1 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"
|
||
|
||
|
||
|
||
typedef SCM (*scm_t_catch_body) (void *data);
|
||
typedef SCM (*scm_t_catch_handler) (void *data,
|
||
SCM tag, SCM throw_args);
|
||
|
||
SCM_API SCM scm_c_catch (SCM tag,
|
||
scm_t_catch_body body,
|
||
void *body_data,
|
||
scm_t_catch_handler handler,
|
||
void *handler_data,
|
||
scm_t_catch_handler pre_unwind_handler,
|
||
void *pre_unwind_handler_data);
|
||
|
||
SCM_API SCM scm_c_with_throw_handler (SCM tag,
|
||
scm_t_catch_body body,
|
||
void *body_data,
|
||
scm_t_catch_handler handler,
|
||
void *handler_data,
|
||
int lazy_catch_p);
|
||
|
||
SCM_API SCM scm_internal_catch (SCM tag,
|
||
scm_t_catch_body body,
|
||
void *body_data,
|
||
scm_t_catch_handler handler,
|
||
void *handler_data);
|
||
|
||
SCM_API SCM scm_internal_lazy_catch (SCM tag,
|
||
scm_t_catch_body body,
|
||
void *body_data,
|
||
scm_t_catch_handler handler,
|
||
void *handler_data);
|
||
|
||
SCM_API SCM scm_internal_stack_catch (SCM tag,
|
||
scm_t_catch_body body,
|
||
void *body_data,
|
||
scm_t_catch_handler handler,
|
||
void *handler_data);
|
||
|
||
/* The first argument to scm_body_thunk should be a pointer to one of
|
||
these. See the implementation of catch in throw.c. */
|
||
struct scm_body_thunk_data
|
||
{
|
||
/* The tag being caught. We only use it to figure out what
|
||
arguments to pass to the body procedure; see scm_catch_thunk_body for
|
||
details. */
|
||
SCM tag;
|
||
|
||
/* The Scheme procedure object constituting the catch body.
|
||
scm_body_by_proc invokes this. */
|
||
SCM body_proc;
|
||
};
|
||
|
||
SCM_API SCM scm_body_thunk (void *);
|
||
|
||
|
||
SCM_API SCM scm_handle_by_proc (void *, SCM, SCM);
|
||
SCM_API SCM scm_handle_by_proc_catching_all (void *, SCM, SCM);
|
||
SCM_API SCM scm_handle_by_message (void *, SCM, SCM);
|
||
SCM_API SCM scm_handle_by_message_noexit (void *, SCM, SCM);
|
||
SCM_API SCM scm_handle_by_throw (void *, SCM, SCM);
|
||
SCM_API int scm_exit_status (SCM args);
|
||
|
||
SCM_API SCM scm_catch_with_pre_unwind_handler (SCM tag, SCM thunk, SCM handler, SCM lazy_handler);
|
||
SCM_API SCM scm_catch (SCM tag, SCM thunk, SCM handler);
|
||
SCM_API SCM scm_with_throw_handler (SCM tag, SCM thunk, SCM handler);
|
||
SCM_API SCM scm_lazy_catch (SCM tag, SCM thunk, SCM handler);
|
||
SCM_API SCM scm_ithrow (SCM key, SCM args, int noreturn);
|
||
|
||
SCM_API SCM scm_throw (SCM key, SCM args);
|
||
SCM_API void scm_init_throw (void);
|
||
|
||
#endif /* SCM_THROW_H */
|
||
|
||
/*
|
||
Local Variables:
|
||
c-file-style: "gnu"
|
||
End:
|
||
*/
|