* *.[hc]: add Emacs magic at the end of file, to ensure GNU
[bpt/guile.git] / libguile / throw.h
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1/* classes: h_files */
2
3#ifndef THROWH
4#define THROWH
7dc6e754 5/* Copyright (C) 1995,1996,1998 Free Software Foundation, Inc.
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6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this software; see the file COPYING. If not, write to
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19 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
20 * Boston, MA 02111-1307 USA
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21 *
22 * As a special exception, the Free Software Foundation gives permission
23 * for additional uses of the text contained in its release of GUILE.
24 *
25 * The exception is that, if you link the GUILE library with other files
26 * to produce an executable, this does not by itself cause the
27 * resulting executable to be covered by the GNU General Public License.
28 * Your use of that executable is in no way restricted on account of
29 * linking the GUILE library code into it.
30 *
31 * This exception does not however invalidate any other reasons why
32 * the executable file might be covered by the GNU General Public License.
33 *
34 * This exception applies only to the code released by the
35 * Free Software Foundation under the name GUILE. If you copy
36 * code from other Free Software Foundation releases into a copy of
37 * GUILE, as the General Public License permits, the exception does
38 * not apply to the code that you add in this way. To avoid misleading
39 * anyone as to the status of such modified files, you must delete
40 * this exception notice from them.
41 *
42 * If you write modifications of your own for GUILE, it is your choice
43 * whether to permit this exception to apply to your modifications.
82892bed 44 * If you do not wish that, delete this exception notice. */
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45\f
46
b4309c3c 47#include "libguile/__scm.h"
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48
49\f
fec45334 50
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51typedef SCM (*scm_catch_body_t) (void *data);
52typedef SCM (*scm_catch_handler_t) (void *data,
53 SCM tag, SCM throw_args);
650fa1ab 54
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55extern SCM scm_internal_catch (SCM tag,
56 scm_catch_body_t body,
57 void *body_data,
58 scm_catch_handler_t handler,
59 void *handler_data);
816a6f06 60
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61extern SCM scm_internal_lazy_catch (SCM tag,
62 scm_catch_body_t body,
63 void *body_data,
64 scm_catch_handler_t handler,
65 void *handler_data);
ccbfefb7 66
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67extern SCM scm_internal_stack_catch (SCM tag,
68 scm_catch_body_t body,
69 void *body_data,
70 scm_catch_handler_t handler,
71 void *handler_data);
95384717 72
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73/* The first argument to scm_body_thunk should be a pointer to one of
74 these. See the implementation of catch in throw.c. */
75struct scm_body_thunk_data
76{
77 /* The tag being caught. We only use it to figure out what
78 arguments to pass to the body procedure; see scm_catch_thunk_body for
79 details. */
80 SCM tag;
81
82 /* The Scheme procedure object constituting the catch body.
83 scm_body_by_proc invokes this. */
84 SCM body_proc;
85};
86
7866a09b 87extern SCM scm_body_thunk (void *);
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88
89
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90extern SCM scm_handle_by_proc (void *, SCM, SCM);
91extern SCM scm_handle_by_proc_catching_all (void *, SCM, SCM);
92extern SCM scm_handle_by_message (void *, SCM, SCM);
93extern SCM scm_handle_by_message_noexit (void *, SCM, SCM);
94extern SCM scm_handle_by_throw (void *, SCM, SCM);
95extern int scm_exit_status (SCM args);
650fa1ab 96
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97extern SCM scm_catch (SCM tag, SCM thunk, SCM handler);
98extern SCM scm_lazy_catch (SCM tag, SCM thunk, SCM handler);
99extern SCM scm_ithrow (SCM key, SCM args, int noreturn);
1a36eef2 100
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101extern SCM scm_throw (SCM key, SCM args);
102extern void scm_init_throw (void);
0f2d19dd 103#endif /* THROWH */
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104
105/*
106 Local Variables:
107 c-file-style: "gnu"
108 End:
109*/