2 * Portable Exception Handling for ANSI C.
3 * Copyright (C) 1999 Kaz Kylheku <kaz@ashi.footprints.net>
5 * Free Software License:
7 * All rights are reserved by the author, with the following exceptions:
8 * Permission is granted to freely reproduce and distribute this software,
9 * possibly in exchange for a fee, provided that this copyright notice appears
10 * intact. Permission is also granted to adapt this software to produce
11 * derivative works, as long as the modified versions carry this copyright
12 * notice and additional notices stating that the work has been modified.
13 * This source code may be translated into executable form and incorporated
14 * into proprietary software; there is no requirement for such software to
15 * contain a copyright notice related to this source.
28 #define XCEPT_GROUP_ANY 0
29 #define XCEPT_CODE_ANY 0
30 #define XCEPT_BAD_ALLOC 1
36 enum { except_no_call, except_call };
39 unsigned long except_group;
40 unsigned long except_code;
44 except_id_t volatile except_id;
45 const char *volatile except_message;
46 void *volatile except_dyndata;
49 struct except_cleanup {
50 void (*except_func)(void *);
55 const except_id_t *except_id;
61 enum except_stacktype {
62 XCEPT_CLEANUP, XCEPT_CATCHER
65 struct except_stacknode {
66 struct except_stacknode *except_down;
67 enum except_stacktype except_type;
69 struct except_catch *except_catcher;
70 struct except_cleanup *except_cleanup;
74 /* private functions made external so they can be used in macros */
75 extern void except_setup_clean(struct except_stacknode *,
76 struct except_cleanup *, void (*)(void *), void *);
77 extern void except_setup_try(struct except_stacknode *,
78 struct except_catch *, const except_id_t [], size_t);
79 extern struct except_stacknode *except_pop(void);
81 /* public interface functions */
82 extern int except_init(void);
83 extern void except_deinit(void);
84 extern void except_rethrow(except_t *);
85 extern void except_throw(long, long, const char *);
86 extern void except_throwd(long, long, const char *, void *);
87 extern void except_throwf(long, long, const char *, ...);
88 extern void (*except_unhandled_catcher(void (*)(except_t *)))(except_t *);
89 extern unsigned long except_code(except_t *);
90 extern unsigned long except_group(except_t *);
91 extern const char *except_message(except_t *);
92 extern void *except_data(except_t *);
93 extern void *except_take_data(except_t *);
94 extern void except_set_allocator(void *(*)(size_t), void (*)(void *));
95 extern void *except_alloc(size_t);
96 extern void except_free(void *);
98 #define except_code(E) ((E)->except_id.except_code)
99 #define except_group(E) ((E)->except_id.except_group)
100 #define except_message(E) ((E)->except_message)
101 #define except_data(E) ((E)->except_dyndata)
108 * void except_cleanup_push(void (*)(void *), void *);
109 * void except_cleanup_pop(int);
110 * void except_checked_cleanup_pop(void (*)(void *), int);
111 * void except_try_push(const except_id_t [], size_t, except_t **);
112 * void except_try_pop(void);
115 #define except_cleanup_push(F, C) \
117 struct except_stacknode except_sn; \
118 struct except_cleanup except_cl; \
119 except_setup_clean(&except_sn, &except_cl, F, C)
121 #define except_cleanup_pop(E) \
124 except_cl.except_func(except_cl.except_context); \
127 #define except_checked_cleanup_pop(F, E) \
129 assert (except_cl.except_func == (F)); \
131 except_cl.except_func(except_cl.except_context); \
134 #define except_try_push(ID, NUM, PPE) \
136 struct except_stacknode except_sn; \
137 struct except_catch except_ch; \
138 except_setup_try(&except_sn, &except_ch, ID, NUM); \
139 if (setjmp(except_ch.except_jmp)) \
140 *(PPE) = &except_ch.except_obj; \
144 #define except_try_pop() \
145 except_free(except_ch.except_obj.except_dyndata); \