qemu/compatfd.h

/*
 * signalfd/eventfd compatibility
 *
 * Copyright IBM, Corp. 2008
 *
 * Authors:
 *  Anthony Liguori   <aliguori@us.ibm.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2.  See
 * the COPYING file in the top-level directory.
 *
 */

#ifndef QEMU_COMPATFD_H
#define QEMU_COMPATFD_H

#include <signal.h>

struct qemu_signalfd_siginfo {
    uint32_t ssi_signo;   /* Signal number */
    int32_t  ssi_errno;   /* Error number (unused) */
    int32_t  ssi_code;    /* Signal code */
    uint32_t ssi_pid;     /* PID of sender */
    uint32_t ssi_uid;     /* Real UID of sender */
    int32_t  ssi_fd;      /* File descriptor (SIGIO) */
    uint32_t ssi_tid;     /* Kernel timer ID (POSIX timers) */
    uint32_t ssi_band;    /* Band event (SIGIO) */
    uint32_t ssi_overrun; /* POSIX timer overrun count */
    uint32_t ssi_trapno;  /* Trap number that caused signal */
    int32_t  ssi_status;  /* Exit status or signal (SIGCHLD) */
    int32_t  ssi_int;     /* Integer sent by sigqueue(2) */
    uint64_t ssi_ptr;     /* Pointer sent by sigqueue(2) */
    uint64_t ssi_utime;   /* User CPU time consumed (SIGCHLD) */
    uint64_t ssi_stime;   /* System CPU time consumed (SIGCHLD) */
    uint64_t ssi_addr;    /* Address that generated signal
                             (for hardware-generated signals) */
    uint8_t  pad[48];     /* Pad size to 128 bytes (allow for
                             additional fields in the future) */
};

int qemu_signalfd(const sigset_t *mask);
bool qemu_signalfd_available(void);

#endif