/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_SIGNAL_TYPES_H
#define _LINUX_SIGNAL_TYPES_H

/*
 * Basic signal handling related data type definitions:
 */

#include <linux/types.h>
#include <uapi/linux/signal.h>

typedef struct kernel_siginfo {
        __SIGINFO;
} kernel_siginfo_t;

struct ucounts;

/*
 * Real Time signals may be queued.
 */

struct sigqueue {
        struct list_head list;
        int flags;
        kernel_siginfo_t info;
        struct ucounts *ucounts;
};

/* flags values. */
#define SIGQUEUE_PREALLOC       1

struct sigpending {
        struct list_head list;
        sigset_t signal;
};

struct sigaction {
#ifndef __ARCH_HAS_IRIX_SIGACTION
        __sighandler_t  sa_handler;
        unsigned long   sa_flags;
#else
        unsigned int    sa_flags;
        __sighandler_t  sa_handler;
#endif
#ifdef __ARCH_HAS_SA_RESTORER
        __sigrestore_t sa_restorer;
#endif
        sigset_t        sa_mask;        /* mask last for extensibility */
};

struct k_sigaction {
        struct sigaction sa;
#ifdef __ARCH_HAS_KA_RESTORER
        __sigrestore_t ka_restorer;
#endif
};

#ifdef CONFIG_OLD_SIGACTION
struct old_sigaction {
        __sighandler_t sa_handler;
        old_sigset_t sa_mask;
        unsigned long sa_flags;
        __sigrestore_t sa_restorer;
};
#endif

struct ksignal {
        struct k_sigaction ka;
        kernel_siginfo_t info;
        int sig;
};

/* Used to kill the race between sigaction and forced signals */
#define SA_IMMUTABLE            0x00800000

#ifndef __ARCH_UAPI_SA_FLAGS
#ifdef SA_RESTORER
#define __ARCH_UAPI_SA_FLAGS    SA_RESTORER
#else
#define __ARCH_UAPI_SA_FLAGS    0
#endif
#endif

#define UAPI_SA_FLAGS                                                          \
        (SA_NOCLDSTOP | SA_NOCLDWAIT | SA_SIGINFO | SA_ONSTACK | SA_RESTART |  \
         SA_NODEFER | SA_RESETHAND | SA_EXPOSE_TAGBITS | __ARCH_UAPI_SA_FLAGS)

#endif /* _LINUX_SIGNAL_TYPES_H */