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
|
/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
* Copyright (c) 2026-present Eclipse ThreadX contributors
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** ThreadX Component */
/** */
/** POSIX Compliancy Wrapper (POSIX) */
/** */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/* */
/* EKP DEFINITIONS RELEASE */
/* */
/* signal.h PORTABLE C */
/* 6.2.0 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This file defines the constants, structures, etc.needed to */
/* implement signals functionality for POSIX Users (POSIX) */
/* */
/**************************************************************************/
#ifndef _SIGNAL_H
#define _SIGNAL_H
/* The POSIX wrapper for ThreadX supports a maximum of 32 signals, from 0
through 31, inclusive. In this implemenation, signals are NOT queued. */
/* Define constants for the signal implementation. */
#define MAX_SIGNALS 32
#define SIGRTMIN 0
#define SIGRTMAX 31
#define SIG_DFL (void *) 0
#define SIG_IGN (void *) 0
#define SIG_BLOCK 1
#define SIG_SETMASK 2
#define SIG_UNBLOCK 3
/* Define the typdefs for this signal handling implementation. */
/* Define the type that holds the desired signals. */
typedef struct sigset_t_struct
{
unsigned long signal_set;
} sigset_t;
/* Define the type that keeps track of information in the POSIX thread control block. POSIX threads are used to simulate the behavior
of POSIX signals in this implemenation. */
struct pthread_control_block;
struct pthread_t_variable;
typedef struct signal_info_struct
{
UINT signal_handler; /* This is a flag. If TRUE, this thread is being used as a signal handler. If FALSE, it is a regular thread. */
UINT signal_nesting_depth; /* A positive value indicates the level of nested signal handling the POSIX thread is currently processing. */
sigset_t signal_pending; /* Bit map of signals pending. */
sigset_t signal_mask; /* Signal mask, bit blocks the signal until cleared. */
UINT saved_thread_state; /* Saved ThreadX state of the POSIX thread, at the time of the first signal. */
struct pthread_control_block *base_thread_ptr; /* Pointer to the thread associated with the signal. */
struct pthread_control_block *top_signal_thread; /* Pointer to the top (most recent) signal thread. */
struct pthread_control_block *next_signal_thread; /* Pointer to the next most recent signal thread. */
void (*signal_func[MAX_SIGNALS])(int); /* Array of signal handlers for this thread. */
TX_EVENT_FLAGS_GROUP signal_event_flags; /* ThreadX event flag group used for sigwait */
} signal_info;
/* Define public POSIX routines. */
int signal(int signo, void (*func)(int));
int pthread_kill(ALIGN_TYPE thread, int sig);
int sigwait(const sigset_t *set, int *sig);
int sigemptyset(sigset_t *set);
int sigaddset(sigset_t *set, int signo);
int sigfillset(sigset_t *set);
int sigdelset(sigset_t *set, int signo);
int pthread_sigmask(int how, const sigset_t *newmask, sigset_t *oldmask);
/* Define internal POSIX routines. */
void internal_signal_dispatch(ULONG id);
#endif
|
