source: branches/minix3-book/drivers/log/log.h

/* Includes. */
#include "../drivers.h"
#include "../libdriver/driver.h"
#include <minix/type.h>
#include <minix/const.h>
#include <minix/com.h>
#include <sys/types.h>
#include <minix/ipc.h>

/* Constants and types. */

#define LOG_SIZE        (50*1024) 
#define SUSPENDABLE           1

struct logdevice {
        char log_buffer[LOG_SIZE];
        int     log_size,       /* no. of bytes in log buffer */
                log_read,       /* read mark */
                log_write;      /* write mark */
#if SUSPENDABLE
        int log_proc_nr,
                log_source,
                log_iosize,
                log_revive_alerted,
                log_status;     /* proc that is blocking on read */
        vir_bytes log_user_vir;
#endif
        int     log_selected, log_select_proc,
                log_select_alerted, log_select_ready_ops;
};

/* Function prototypes. */
_PROTOTYPE( void kputc, (int c)                                         );
_PROTOTYPE( int do_new_kmess, (message *m)                              );
_PROTOTYPE( int do_diagnostics, (message *m)                            );
_PROTOTYPE( void log_append, (char *buf, int len)                               );