include/cutils/logger.h

/* utils/logger.h
** 
** Copyright 2007, The Android Open Source Project
**
** This file is dual licensed.  It may be redistributed and/or modified
** under the terms of the Apache 2.0 License OR version 2 of the GNU
** General Public License.
*/

#ifndef _UTILS_LOGGER_H
#define _UTILS_LOGGER_H

#include <stdint.h>

struct logger_entry {
    uint16_t    len;    /* length of the payload */
    uint16_t    __pad;  /* no matter what, we get 2 bytes of padding */
    int32_t     pid;    /* generating process's pid */
    int32_t     tid;    /* generating process's tid */
    int32_t     sec;    /* seconds since Epoch */
    int32_t     nsec;   /* nanoseconds */
    char        msg[0]; /* the entry's payload */
};

#define LOGGER_LOG_MAIN		"log/main"
#define LOGGER_LOG_RADIO	"log/radio"
#define LOGGER_LOG_EVENTS	"log/events"

#define LOGGER_ENTRY_MAX_LEN		(4*1024)
#define LOGGER_ENTRY_MAX_PAYLOAD	\
	(LOGGER_ENTRY_MAX_LEN - sizeof(struct logger_entry))

#ifdef HAVE_IOCTL

#include <sys/ioctl.h>

#define __LOGGERIO	0xAE

#define LOGGER_GET_LOG_BUF_SIZE		_IO(__LOGGERIO, 1) /* size of log */
#define LOGGER_GET_LOG_LEN		_IO(__LOGGERIO, 2) /* used log len */
#define LOGGER_GET_NEXT_ENTRY_LEN	_IO(__LOGGERIO, 3) /* next entry len */
#define LOGGER_FLUSH_LOG		_IO(__LOGGERIO, 4) /* flush log */

#endif // HAVE_IOCTL

#endif /* _UTILS_LOGGER_H */