1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
/* Copyright 2013-2014
* Kaz Kylheku <kaz@kylheku.com>
* Vancouver, Canada
* All rights reserved.
*
* BSD License:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#if HAVE_POSIX_SIGS
#define sig_save_enable \
do { \
int sig_save = async_sig_enabled; \
async_sig_enabled = 1; \
if (!sig_save) \
sig_check(); \
{ \
typedef void v_o_i_d
#define sig_restore_enable \
do { } while (0); \
} \
async_sig_enabled = sig_save; \
} while(0)
#define sig_save_disable \
do { \
int sig_save = async_sig_enabled; \
async_sig_enabled = 1; \
{ \
typedef void v_o_i_d
#define sig_restore_disable \
do { } while (0); \
} \
async_sig_enabled = sig_save; \
if (sig_save) \
sig_check(); \
} while(0)
typedef struct {
jmp_buf jb;
sig_atomic_t se;
sigset_t blocked;
val de;
int rv;
} extended_jmp_buf;
#define extended_setjmp(EJB) \
(setjmp((EJB).jb) \
? (async_sig_enabled = (EJB).se, \
dyn_env = (EJB).de, \
sig_mask(SIG_SETMASK, &(EJB).blocked, 0), \
(EJB).rv) \
: ((EJB).se = async_sig_enabled, \
(EJB).de = dyn_env, \
(EJB).blocked = sig_blocked_cache, 0))
#define extended_longjmp(EJB, ARG) \
((EJB).rv = (ARG), longjmp((EJB).jb, 1))
extern sigset_t sig_blocked_cache;
extern volatile sig_atomic_t async_sig_enabled;
#else
#define sig_save_enable do {
#define sig_save_disable do {
#define sig_restore_enable do { } while (0); } while (0)
#define sig_restore_disable do { } while (0); } while (0)
typedef struct {
jmp_buf jb;
val de;
int rv;
} extended_jmp_buf;
#define extended_setjmp(EJB) \
(setjmp((EJB).jb) \
? (dyn_env = (EJB).de, \
(EJB).rv) \
: ((EJB).de = dyn_env, 0))
#define extended_longjmp(EJB, ARG) \
((EJB).rv = (ARG), longjmp((EJB).jb, 1))
extern int async_sig_enabled;
#endif
extern val dyn_env; /* eval.c */
extern val sig_hup, sig_int, sig_quit, sig_ill, sig_trap, sig_abrt, sig_bus;
extern val sig_fpe, sig_kill, sig_usr1, sig_segv, sig_usr2, sig_pipe, sig_alrm;
extern val sig_term, sig_chld, sig_cont, sig_stop, sig_tstp, sig_ttin;
extern val sig_ttou, sig_urg, sig_xcpu, sig_xfsz, sigtalrm, sig_prof;
extern val sig_poll, sig_sys, sig_winch, sig_iot, sig_stkflt;
extern val sig_io, sig_lost, sig_pwr;
void sig_init(void);
val set_sig_handler(val signo, val lambda);
val get_sig_handler(val signo);
val sig_check(void);
#if HAVE_POSIX_SIGS
int sig_mask(int how, const sigset_t *set, sigset_t *oldset);
#endif
|
