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185d7d97 FXC |
1 | /* Implementation of the SIGNAL and ALARM g77 intrinsics |
2 | Contributed by François-Xavier Coudert <coudert@clipper.ens.fr> | |
3 | ||
4 | This file is part of the GNU Fortran 95 runtime library (libgfortran). | |
5 | ||
6 | Libgfortran is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU General Public | |
8 | License as published by the Free Software Foundation; either | |
9 | version 2 of the License, or (at your option) any later version. | |
10 | ||
11 | In addition to the permissions in the GNU General Public License, the | |
12 | Free Software Foundation gives you unlimited permission to link the | |
13 | compiled version of this file into combinations with other programs, | |
14 | and to distribute those combinations without any restriction coming | |
15 | from the use of this file. (The General Public License restrictions | |
16 | do apply in other respects; for example, they cover modification of | |
17 | the file, and distribution when not linked into a combine | |
18 | executable.) | |
19 | ||
20 | Libgfortran is distributed in the hope that it will be useful, | |
21 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
23 | GNU General Public License for more details. | |
24 | ||
25 | You should have received a copy of the GNU General Public | |
26 | License along with libgfortran; see the file COPYING. If not, | |
27 | write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
28 | Boston, MA 02110-1301, USA. */ | |
29 | ||
30 | #include "config.h" | |
31 | #include "libgfortran.h" | |
32 | ||
33 | #ifdef HAVE_UNISTD_H | |
34 | #include <unistd.h> | |
35 | #endif | |
36 | ||
37 | #ifdef HAVE_SIGNAL_H | |
38 | #include <signal.h> | |
39 | #endif | |
40 | ||
28f8c9e9 FXC |
41 | #ifdef HAVE_INTTYPES_H |
42 | #include <inttypes.h> | |
43 | #endif | |
44 | ||
185d7d97 FXC |
45 | #include <errno.h> |
46 | ||
28f8c9e9 FXC |
47 | #ifdef HAVE_INTPTR_T |
48 | # define INTPTR_T intptr_t | |
49 | #else | |
50 | # define INTPTR_T int | |
51 | #endif | |
52 | ||
185d7d97 FXC |
53 | /* SIGNAL subroutine with PROCEDURE as handler */ |
54 | extern void signal_sub (int *, void (*)(int), int *); | |
55 | iexport_proto(signal_sub); | |
56 | ||
57 | void | |
58 | signal_sub (int *number, void (*handler)(int), int *status) | |
59 | { | |
60 | #ifdef HAVE_SIGNAL | |
28f8c9e9 FXC |
61 | INTPTR_T ret; |
62 | ||
185d7d97 | 63 | if (status != NULL) |
28f8c9e9 FXC |
64 | { |
65 | ret = (INTPTR_T) signal (*number, handler); | |
66 | *status = (int) ret; | |
67 | } | |
185d7d97 FXC |
68 | else |
69 | signal (*number, handler); | |
70 | #else | |
71 | errno = ENOSYS; | |
72 | if (status != NULL) | |
73 | *status = -1; | |
74 | #endif | |
75 | } | |
76 | iexport(signal_sub); | |
77 | ||
78 | ||
79 | /* SIGNAL subroutine with INTEGER as handler */ | |
80 | extern void signal_sub_int (int *, int *, int *); | |
81 | iexport_proto(signal_sub_int); | |
82 | ||
83 | void | |
84 | signal_sub_int (int *number, int *handler, int *status) | |
85 | { | |
86 | #ifdef HAVE_SIGNAL | |
28f8c9e9 FXC |
87 | INTPTR_T ptr = *handler, ret; |
88 | ||
185d7d97 | 89 | if (status != NULL) |
28f8c9e9 FXC |
90 | { |
91 | ret = (INTPTR_T) signal (*number, (void (*)(int)) ptr); | |
92 | *status = (int) ret; | |
93 | } | |
185d7d97 | 94 | else |
28f8c9e9 | 95 | signal (*number, (void (*)(int)) ptr); |
185d7d97 FXC |
96 | #else |
97 | errno = ENOSYS; | |
98 | if (status != NULL) | |
99 | *status = -1; | |
100 | #endif | |
101 | } | |
102 | iexport(signal_sub_int); | |
103 | ||
104 | ||
105 | /* SIGNAL function with PROCEDURE as handler */ | |
106 | extern int signal_func (int *, void (*)(int)); | |
107 | iexport_proto(signal_func); | |
108 | ||
109 | int | |
110 | signal_func (int *number, void (*handler)(int)) | |
111 | { | |
112 | int status; | |
113 | signal_sub (number, handler, &status); | |
114 | return status; | |
115 | } | |
116 | iexport(signal_func); | |
117 | ||
118 | ||
119 | /* SIGNAL function with INTEGER as handler */ | |
120 | extern int signal_func_int (int *, int *); | |
121 | iexport_proto(signal_func_int); | |
122 | ||
123 | int | |
124 | signal_func_int (int *number, int *handler) | |
125 | { | |
126 | int status; | |
127 | signal_sub_int (number, handler, &status); | |
128 | return status; | |
129 | } | |
130 | iexport(signal_func_int); | |
131 | ||
132 | ||
133 | ||
134 | /* ALARM intrinsic with PROCEDURE as handler */ | |
135 | extern void alarm_sub (int *, void (*)(int), int *); | |
136 | iexport_proto(alarm_sub); | |
137 | ||
138 | void | |
139 | alarm_sub (int *seconds, void (*handler)(int), int *status) | |
140 | { | |
141 | #if defined (SIGALRM) && defined (HAVE_ALARM) && defined (HAVE_SIGNAL) | |
142 | if (status != NULL) | |
143 | { | |
144 | if (signal (SIGALRM, handler) == SIG_ERR) | |
145 | *status = -1; | |
146 | else | |
147 | *status = alarm (*seconds); | |
148 | } | |
149 | else | |
150 | { | |
151 | signal (SIGALRM, handler); | |
152 | alarm (*seconds); | |
153 | } | |
154 | #else | |
155 | errno = ENOSYS; | |
156 | if (status != NULL) | |
157 | *status = -1; | |
158 | #endif | |
159 | } | |
160 | iexport(alarm_sub); | |
161 | ||
162 | ||
163 | /* ALARM intrinsic with INTEGER as handler */ | |
164 | extern void alarm_sub_int (int *, int *, int *); | |
165 | iexport_proto(alarm_sub_int); | |
166 | ||
167 | void | |
168 | alarm_sub_int (int *seconds, int *handler, int *status) | |
169 | { | |
170 | #if defined (SIGALRM) && defined (HAVE_ALARM) && defined (HAVE_SIGNAL) | |
171 | if (status != NULL) | |
172 | { | |
02330e19 | 173 | if (signal (SIGALRM, (void (*)(int)) *handler) == SIG_ERR) |
185d7d97 FXC |
174 | *status = -1; |
175 | else | |
176 | *status = alarm (*seconds); | |
177 | } | |
178 | else | |
179 | { | |
02330e19 | 180 | signal (SIGALRM, (void (*)(int)) *handler); |
185d7d97 FXC |
181 | alarm (*seconds); |
182 | } | |
183 | #else | |
184 | errno = ENOSYS; | |
185 | if (status != NULL) | |
186 | *status = -1; | |
187 | #endif | |
188 | } | |
189 | iexport(alarm_sub_int); | |
190 |