mirror of
https://github.com/azure-rtos/threadx
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120 lines
6.3 KiB
C
120 lines
6.3 KiB
C
/***************************************************************************
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* Copyright (c) 2024 Microsoft Corporation
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*
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* This program and the accompanying materials are made available under the
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* terms of the MIT License which is available at
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* https://opensource.org/licenses/MIT.
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*
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* SPDX-License-Identifier: MIT
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**************************************************************************/
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/**************************************************************************/
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/**************************************************************************/
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/** */
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/** ThreadX Component */
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/** */
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/** POSIX Compliancy Wrapper (POSIX) */
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/** */
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/**************************************************************************/
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/**************************************************************************/
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/**************************************************************************/
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/* */
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/* EKP DEFINITIONS RELEASE */
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/* */
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/* signal.h PORTABLE C */
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/* 6.2.0 */
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/* AUTHOR */
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/* */
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/* William E. Lamie, Microsoft Corporation */
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/* */
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/* DESCRIPTION */
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/* */
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/* This file defines the constants, structures, etc.needed to */
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/* implement signals functionality for POSIX Users (POSIX) */
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/* */
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/* */
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/* RELEASE HISTORY */
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/* */
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/* DATE NAME DESCRIPTION */
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/* */
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/* 06-02-2021 William E. Lamie Initial Version 6.1.7 */
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/* 10-31-2022 Scott Larson Update pthread_kill argument */
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/* type, */
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/* resulting in version 6.2.0 */
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/* */
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/**************************************************************************/
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#ifndef _SIGNAL_H
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#define _SIGNAL_H
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/* The POSIX wrapper for ThreadX supports a maximum of 32 signals, from 0
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through 31, inclusive. In this implemenation, signals are NOT queued. */
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/* Define constants for the signal implementation. */
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#define MAX_SIGNALS 32
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#define SIGRTMIN 0
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#define SIGRTMAX 31
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#define SIG_DFL (void *) 0
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#define SIG_IGN (void *) 0
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#define SIG_BLOCK 1
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#define SIG_SETMASK 2
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#define SIG_UNBLOCK 3
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/* Define the typdefs for this signal handling implementation. */
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/* Define the type that holds the desired signals. */
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typedef struct sigset_t_struct
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{
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unsigned long signal_set;
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} sigset_t;
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/* Define the type that keeps track of information in the POSIX thread control block. POSIX threads are used to simulate the behavior
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of POSIX signals in this implemenation. */
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struct pthread_control_block;
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struct pthread_t_variable;
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typedef struct signal_info_struct
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{
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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. */
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UINT signal_nesting_depth; /* A positive value indicates the level of nested signal handling the POSIX thread is currently processing. */
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sigset_t signal_pending; /* Bit map of signals pending. */
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sigset_t signal_mask; /* Signal mask, bit blocks the signal until cleared. */
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UINT saved_thread_state; /* Saved ThreadX state of the POSIX thread, at the time of the first signal. */
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struct pthread_control_block *base_thread_ptr; /* Pointer to the thread associated with the signal. */
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struct pthread_control_block *top_signal_thread; /* Pointer to the top (most recent) signal thread. */
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struct pthread_control_block *next_signal_thread; /* Pointer to the next most recent signal thread. */
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void (*signal_func[MAX_SIGNALS])(int); /* Array of signal handlers for this thread. */
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TX_EVENT_FLAGS_GROUP signal_event_flags; /* ThreadX event flag group used for sigwait */
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} signal_info;
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/* Define public POSIX routines. */
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int signal(int signo, void (*func)(int));
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int pthread_kill(ALIGN_TYPE thread, int sig);
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int sigwait(const sigset_t *set, int *sig);
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int sigemptyset(sigset_t *set);
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int sigaddset(sigset_t *set, int signo);
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int sigfillset(sigset_t *set);
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int sigdelset(sigset_t *set, int signo);
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int pthread_sigmask(int how, const sigset_t *newmask, sigset_t *oldmask);
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/* Define internal POSIX routines. */
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void internal_signal_dispatch(ULONG id);
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#endif
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