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
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
/*
Copyright (C) 2002 John W. Eaton
This file is part of Octave.
Octave is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
Octave 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 General Public License
for more details.
You should have received a copy of the GNU General Public License
along with Octave; see the file COPYING. If not, write to the Free
Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
*/
#if !defined (octave_quit_h)
#define octave_quit_h 1
#ifdef __cplusplus
#include <new>
extern "C" {
#endif
#include <stdio.h>
#include <signal.h>
#include <setjmp.h>
#if defined (OCTAVE_HAVE_SIG_JUMP)
typedef sigjmp_buf octave_jmp_buf;
#define octave_set_current_context sigsetjmp (current_context, 1)
#else
typedef jmp_buf octave_jmp_buf;
#define octave_set_current_context setjmp (current_context)
#endif
extern octave_jmp_buf current_context;
extern void octave_save_current_context (void *);
extern void octave_restore_current_context (void *);
extern void octave_jump_to_enclosing_context (void) GCC_ATTR_NORETURN;
extern void octave_save_signal_mask (void);
extern void octave_restore_signal_mask (void);
#ifdef __cplusplus
class
octave_interrupt_exception
{
};
#endif
extern sig_atomic_t octave_interrupt_immediately;
/*
> 0: interrupt pending
0: no interrupt pending
< 0: handling interrupt
*/
extern sig_atomic_t octave_interrupt_state;
extern sig_atomic_t octave_allocation_error;
extern sig_atomic_t octave_signal_caught;
extern void octave_handle_signal (void);
extern void octave_throw_interrupt_exception (void) GCC_ATTR_NORETURN;
extern void octave_throw_bad_alloc (void) GCC_ATTR_NORETURN;
#define OCTAVE_QUIT \
do \
{ \
if (octave_signal_caught) \
{ \
octave_signal_caught = 0; \
octave_handle_signal (); \
} \
} \
while (0)
/* Normally, you just want to use
BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE;
... some code that calls a "foreign" function ...
END_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE;
but sometimes it is useful to do something like
BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_1;
... custom code here, normally ending in a call to
octave_throw_interrupt_exception ...
BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_2;
so that you can perform extra clean up operations before throwing
the interrupt exception. */
#define BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE \
BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_1; \
octave_throw_interrupt_exception (); \
BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_2
#define BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_1 \
do \
{ \
octave_jmp_buf saved_context; \
\
octave_save_current_context ((char *) saved_context); \
\
if (octave_set_current_context) \
{ \
octave_restore_current_context ((char *) saved_context)
#define BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_2 \
} \
else \
{ \
octave_interrupt_immediately++
#define END_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE \
octave_interrupt_immediately--; \
octave_restore_current_context ((char *) saved_context); \
} \
} \
while (0)
#ifdef __cplusplus
#define BEGIN_INTERRUPT_WITH_EXCEPTIONS \
sig_atomic_t saved_octave_interrupt_immediately = octave_interrupt_immediately; \
\
try \
{ \
octave_interrupt_immediately = 0;
#define END_INTERRUPT_WITH_EXCEPTIONS \
} \
catch (octave_interrupt_exception) \
{ \
octave_interrupt_immediately = saved_octave_interrupt_immediately; \
octave_jump_to_enclosing_context (); \
} \
catch (std::bad_alloc) \
{ \
octave_interrupt_immediately = saved_octave_interrupt_immediately; \
octave_allocation_error = 1; \
octave_jump_to_enclosing_context (); \
} \
\
octave_interrupt_immediately = saved_octave_interrupt_immediately
#endif
#ifdef __cplusplus
}
/* These should only be declared for C++ code, and should also be
outside of any extern "C" block. */
extern void (*octave_signal_hook) (void);
extern void (*octave_interrupt_hook) (void);
extern void (*octave_bad_alloc_hook) (void);
#endif
#endif
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/
|
