237 lines
6.8 KiB
C
237 lines
6.8 KiB
C
/*
|
|
* Copyright (c) 2006-2023, RT-Thread Development Team
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2020-02-23 Jesven first version.
|
|
* 2023-07-06 Shell update the generation, pending and delivery API
|
|
* 2023-11-22 Shell support for job control signal
|
|
*/
|
|
|
|
#ifndef __LWP_SIGNAL_H__
|
|
#define __LWP_SIGNAL_H__
|
|
|
|
#include "syscall_generic.h"
|
|
|
|
#include <rtthread.h>
|
|
#include <sys/signal.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#define _USIGNAL_SIGMASK(signo) (1u << ((signo)-1))
|
|
#define LWP_SIG_NO_IGN_SET \
|
|
(_USIGNAL_SIGMASK(SIGCONT) | _USIGNAL_SIGMASK(SIGSTOP) | \
|
|
_USIGNAL_SIGMASK(SIGKILL))
|
|
#define LWP_SIG_IGNORE_SET \
|
|
(_USIGNAL_SIGMASK(SIGCHLD) | _USIGNAL_SIGMASK(SIGURG) | \
|
|
_USIGNAL_SIGMASK(SIGWINCH) /* from 4.3 BSD, not POSIX.1 */)
|
|
#define LWP_SIG_JOBCTL_SET \
|
|
(_USIGNAL_SIGMASK(SIGCONT) | _USIGNAL_SIGMASK(SIGSTOP) | \
|
|
_USIGNAL_SIGMASK(SIGTSTP) | _USIGNAL_SIGMASK(SIGTTIN) | \
|
|
_USIGNAL_SIGMASK(SIGTTOU))
|
|
#define LWP_SIG_STOP_SET \
|
|
(_USIGNAL_SIGMASK(SIGSTOP) | _USIGNAL_SIGMASK(SIGTSTP) | \
|
|
_USIGNAL_SIGMASK(SIGTTIN) | _USIGNAL_SIGMASK(SIGTTOU))
|
|
#define LWP_SIG_ACT_DFL ((lwp_sighandler_t)0)
|
|
#define LWP_SIG_ACT_IGN ((lwp_sighandler_t)1)
|
|
#define LWP_SIG_USER_SA_FLAGS \
|
|
(SA_NOCLDSTOP | SA_NOCLDWAIT | SA_SIGINFO | SA_ONSTACK | SA_RESTART | \
|
|
SA_NODEFER | SA_RESETHAND | SA_EXPOSE_TAGBITS)
|
|
#define LWP_SIG_INVALID_TIMER ((timer_t)-1)
|
|
|
|
typedef enum
|
|
{
|
|
LWP_SIG_MASK_CMD_BLOCK,
|
|
LWP_SIG_MASK_CMD_UNBLOCK,
|
|
LWP_SIG_MASK_CMD_SET_MASK,
|
|
__LWP_SIG_MASK_CMD_WATERMARK
|
|
} lwp_sig_mask_cmd_t;
|
|
|
|
/**
|
|
* LwP implementation of POSIX signal
|
|
*/
|
|
struct lwp_signal
|
|
{
|
|
timer_t real_timer;
|
|
struct lwp_sigqueue sig_queue;
|
|
rt_thread_t sig_dispatch_thr[_LWP_NSIG];
|
|
|
|
lwp_sighandler_t sig_action[_LWP_NSIG];
|
|
lwp_sigset_t sig_action_mask[_LWP_NSIG];
|
|
|
|
lwp_sigset_t sig_action_nodefer;
|
|
lwp_sigset_t sig_action_onstack;
|
|
lwp_sigset_t sig_action_restart;
|
|
lwp_sigset_t sig_action_siginfo;
|
|
lwp_sigset_t sig_action_nocldstop;
|
|
lwp_sigset_t sig_action_nocldwait;
|
|
};
|
|
|
|
struct rt_lwp;
|
|
struct rt_processgroup;
|
|
|
|
#ifndef ARCH_MM_MMU
|
|
void lwp_sighandler_set(int sig, lwp_sighandler_t func);
|
|
void lwp_thread_sighandler_set(int sig, lwp_sighandler_t func);
|
|
#endif
|
|
|
|
rt_inline void lwp_sigqueue_init(lwp_sigqueue_t sigq)
|
|
{
|
|
rt_memset(&sigq->sigset_pending, 0, sizeof(lwp_sigset_t));
|
|
rt_list_init(&sigq->siginfo_list);
|
|
}
|
|
|
|
/**
|
|
* @brief release the signal queue
|
|
*
|
|
* @param sigq target signal queue
|
|
*/
|
|
void lwp_sigqueue_clear(lwp_sigqueue_t sigq);
|
|
|
|
rt_err_t lwp_signal_init(struct lwp_signal *sig);
|
|
|
|
rt_err_t lwp_signal_detach(struct lwp_signal *signal);
|
|
|
|
rt_inline void lwp_thread_signal_detach(struct lwp_thread_signal *tsig)
|
|
{
|
|
lwp_sigqueue_clear(&tsig->sig_queue);
|
|
}
|
|
|
|
/**
|
|
* @brief send a signal to the process
|
|
*
|
|
* @param lwp the process to be killed
|
|
* @param signo the signal number
|
|
* @param code as in siginfo
|
|
* @param value as in siginfo
|
|
* @return rt_err_t RT_EINVAL if the parameter is invalid, RT_EOK as
|
|
* successful
|
|
*
|
|
* @note the *signal_kill have the same definition of a successful return as
|
|
* kill() in IEEE Std 1003.1-2017
|
|
*/
|
|
rt_err_t lwp_signal_kill(struct rt_lwp *lwp, long signo, long code,
|
|
lwp_siginfo_ext_t value);
|
|
|
|
/**
|
|
* @brief set or examine the signal action of signo
|
|
*
|
|
* @param signo signal number
|
|
* @param act the signal action
|
|
* @param oact the old signal action
|
|
* @return rt_err_t
|
|
*/
|
|
rt_err_t lwp_signal_action(struct rt_lwp *lwp, int signo,
|
|
const struct lwp_sigaction *restrict act,
|
|
struct lwp_sigaction *restrict oact);
|
|
|
|
/**
|
|
* @brief send a signal to the thread
|
|
*
|
|
* @param thread target thread
|
|
* @param signo the signal number
|
|
* @param code as in siginfo
|
|
* @param value as in siginfo
|
|
* @return rt_err_t RT_EINVAL if the parameter is invalid, RT_EOK as
|
|
* successful
|
|
*/
|
|
rt_err_t lwp_thread_signal_kill(rt_thread_t thread, long signo, long code,
|
|
lwp_siginfo_ext_t value);
|
|
|
|
/**
|
|
* @brief set signal mask of target thread
|
|
*
|
|
* @param thread the target thread
|
|
* @param how command
|
|
* @param sigset operand
|
|
* @param oset the address to old set
|
|
* @return rt_err_t
|
|
*/
|
|
rt_err_t lwp_thread_signal_mask(rt_thread_t thread, lwp_sig_mask_cmd_t how,
|
|
const lwp_sigset_t *sigset, lwp_sigset_t *oset);
|
|
|
|
/**
|
|
* @brief Catch signal if exists and no return, otherwise return with no
|
|
* side effect
|
|
*
|
|
* @param exp_frame the exception frame on kernel stack
|
|
*/
|
|
void lwp_thread_signal_catch(void *exp_frame);
|
|
|
|
/**
|
|
* @brief Check if it's okay to suspend for current lwp thread
|
|
*
|
|
* @param thread target thread
|
|
* @param suspend_flag suspend flag of target thread
|
|
* @return int 1 if can be suspended, otherwise not
|
|
*/
|
|
int lwp_thread_signal_suspend_check(rt_thread_t thread, int suspend_flag);
|
|
|
|
/**
|
|
* @brief Asynchronously wait for signal
|
|
*
|
|
* @param thread target thread
|
|
* @param sigset the signals to be waited
|
|
* @param info address of user siginfo
|
|
* @param timeout timeout of waiting
|
|
* @return rt_err_t
|
|
*/
|
|
rt_err_t lwp_thread_signal_timedwait(rt_thread_t thread, lwp_sigset_t *sigset,
|
|
siginfo_t *usi, struct timespec *timeout);
|
|
|
|
/**
|
|
* @brief Examine the set of signals that are blocked from delivery to the
|
|
* calling thread and that are pending on the process or the calling thread
|
|
*
|
|
* @param thread target thread
|
|
* @param sigset where mask of pending signals is returned
|
|
*/
|
|
void lwp_thread_signal_pending(rt_thread_t thread, lwp_sigset_t *sigset);
|
|
|
|
/**
|
|
* @brief send a signal to the process group
|
|
*
|
|
* @param pgrp target process group
|
|
* @param signo the signal number
|
|
* @param code as in siginfo
|
|
* @param value as in siginfo
|
|
* @return rt_err_t RT_EINVAL if the parameter is invalid, RT_EOK as
|
|
* successful
|
|
*/
|
|
rt_err_t lwp_pgrp_signal_kill(struct rt_processgroup *pgrp, long signo,
|
|
long code, lwp_siginfo_ext_t value);
|
|
|
|
rt_inline int lwp_sigismember(lwp_sigset_t *set, int _sig)
|
|
{
|
|
unsigned long sig = _sig - 1;
|
|
|
|
if (_LWP_NSIG_WORDS == 1)
|
|
{
|
|
return 1 & (set->sig[0] >> sig);
|
|
}
|
|
else
|
|
{
|
|
return 1 & (set->sig[sig / _LWP_NSIG_BPW] >> (sig % _LWP_NSIG_BPW));
|
|
}
|
|
}
|
|
|
|
struct itimerspec;
|
|
|
|
rt_bool_t lwp_sigisign(struct rt_lwp *lwp, int _sig);
|
|
|
|
rt_err_t lwp_signal_setitimer(struct rt_lwp *lwp, int which,
|
|
const struct itimerspec *restrict new,
|
|
struct itimerspec *restrict old);
|
|
|
|
rt_bool_t lwp_signal_restart_syscall(struct rt_lwp *lwp, int error_code);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* __LWP_SIGNAL_H__ */
|