1 /*
2 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
3 * Copyright (c) 2020-2023 Huawei Device Co., Ltd. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this list of
9 * conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
12 * of conditions and the following disclaimer in the documentation and/or other materials
13 * provided with the distribution.
14 *
15 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
16 * to endorse or promote products derived from this software without specific prior written
17 * permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #ifndef _LOS_SIGNAL_H
33 #define _LOS_SIGNAL_H
34
35 #include <stddef.h>
36 #include <limits.h>
37 #include <sys/types.h>
38 #include <signal.h>
39 #include "los_event.h"
40
41 #ifdef __cplusplus
42 #if __cplusplus
43 extern "C" {
44 #endif /* __cplusplus */
45 #endif /* __cplusplus */
46
47 #define LOS_BIT_SET(val, bit) ((val) = (val) | (1ULL << (UINT32)(bit)))
48 #define LOS_BIT_CLR(val, bit) ((val) = (val) & ~(1ULL << (UINT32)(bit)))
49 #define LOS_IS_BIT_SET(val, bit) (bool)((((val) >> (UINT32)(bit)) & 1ULL))
50
51 #define SIG_STOP_VISIT 1
52
53 #define OS_KERNEL_KILL_PERMISSION 0U
54 #define OS_USER_KILL_PERMISSION 3U
55
56 #define OS_RETURN_IF(expr, errcode) \
57 if ((expr)) { \
58 return errcode; \
59 }
60
61 #define OS_RETURN_IF_VOID(expr) \
62 if ((expr)) { \
63 return; \
64 }
65 #define OS_GOTO_EXIT_IF(expr, errcode) \
66 if (expr) { \
67 ret = errcode; \
68 goto EXIT; \
69 }
70 #define OS_GOTO_EXIT_IF_ONLY(expr) \
71 if (expr) { \
72 goto EXIT; \
73 }
74
75 #define OS_RETURN_VOID_IF_NULL(pPara) \
76 if (NULL == (pPara)) { \
77 return; \
78 }
79 #define OS_RETURN_IF_NULL(pPara) \
80 if (NULL == (pPara)) { \
81 return (-EINVAL); \
82 }
83
84 #define OS_GOTO_EXIT_IF_NULL(pPara) \
85 if (NULL == (pPara)) { \
86 ret = -EINVAL; \
87 goto EXIT; \
88 }
89
90 typedef void (*sa_sighandler_t)(int);
91 typedef void (*sa_siginfoaction_t)(int, siginfo_t *, void *);
92
93 #define SIGNO2SET(s) ((sigset_t)1ULL << (s))
94 #define NULL_SIGNAL_SET ((sigset_t)0ULL)
95 #define FULL_SIGNAL_SET ((sigset_t)~0ULL)
96
GOOD_SIGNO(unsigned int sig)97 static inline int GOOD_SIGNO(unsigned int sig)
98 {
99 return (sig < _NSIG) ? 1 : 0;
100 }
101
102 #define MAX_SIG_ARRAY_IN_MUSL 128
103
104 typedef struct {
105 unsigned long sig[MAX_SIG_ARRAY_IN_MUSL / sizeof(unsigned long)];
106 } sigset_t_l;
107
108 typedef struct sigaction sigaction_t;
109
110 struct sigactq {
111 struct sigactq *flink; /* Forward link */
112 sigaction_t act; /* Sigaction data */
113 uint8_t signo; /* Signal associated with action */
114 };
115 typedef struct sigactq sigactq_t;
116
117 struct sq_entry_s {
118 struct sq_entry_s *flink;
119 };
120 typedef struct sq_entry_s sq_entry_t;
121
122 struct sigpendq {
123 struct sigpendq *flink; /* Forward link */
124 siginfo_t info; /* Signal information */
125 uint8_t type; /* (Used to manage allocations) */
126 };
127 typedef struct sigpendq sigpendq_t;
128
129 struct sq_queue_s {
130 sq_entry_t *head;
131 sq_entry_t *tail;
132 };
133 typedef struct sq_queue_s sq_queue_t;
134
135 typedef struct SigInfoListNode {
136 struct SigInfoListNode *next;
137 siginfo_t info;
138 } SigInfoListNode;
139
140 typedef struct {
141 sigset_t sigFlag;
142 sigset_t sigPendFlag;
143 sigset_t sigprocmask; /* Signals that are blocked */
144 sq_queue_t sigactionq;
145 LOS_DL_LIST waitList;
146 sigset_t sigwaitmask; /* Waiting for pending signals */
147 siginfo_t sigunbinfo; /* Signal info when task unblocked */
148 SigInfoListNode *tmpInfoListHead; /* Signal info List */
149 unsigned int sigIntLock;
150 void *sigContext;
151 unsigned int count;
152 } sig_cb;
153
154 typedef struct ProcessCB LosProcessCB;
155
156 #define SIGEV_THREAD_ID 4
157
158 int sys_sigqueue(pid_t, int, const union sigval);
159 int sys_sigpending(sigset_t *);
160 int sys_rt_sigtimedwait(const sigset_t *mask, siginfo_t *si, const struct timespec *ts, size_t sigsetsize);
161 int sys_sigsuspend(const sigset_t *);
162 int OsKillLock(pid_t pid, int sig);
163 int OsSigAction(int sig, const sigaction_t *act, sigaction_t *oact);
164 int OsSigprocMask(int how, const sigset_t_l *set, sigset_t_l *oldset);
165 int OsPthreadKill(UINT32 tid, int signo);
166 int OsSigEmptySet(sigset_t *);
167 int OsSigAddSet(sigset_t *, int);
168 int OsSigIsMember(const sigset_t *, int);
169 int OsKill(pid_t pid, int sig, int permission);
170 int OsSendSigToProcess(LosProcessCB *spcb, int sig, int permission);
171 int OsDispatch(pid_t pid, siginfo_t *info, int permission);
172 int OsSigTimedWait(sigset_t *set, siginfo_t *info, unsigned int timeout);
173 int OsPause(void);
174 int OsSigPending(sigset_t *set);
175 int OsSigSuspend(const sigset_t *set);
176 VOID OsSigIntLock(VOID);
177 VOID OsSigIntUnlock(VOID);
178 INT32 OsTaskKillUnsafe(UINT32 taskID, INT32 signo);
179 VOID OsClearSigInfoTmpList(sig_cb *sigcb);
180
181 #ifdef __cplusplus
182 #if __cplusplus
183 }
184 #endif /* __cplusplus */
185 #endif /* __cplusplus */
186
187 #endif /* _LOS_SIGNAL_H */
188