src/lib-index/mail-transaction-log-private.h

	mail-transaction-log-private.h revision 37598dd7a0613a03b12170c450b53c70f2b3d438
#ifndef __MAIL_TRANSACTION_LOG_VIEW_H
#define __MAIL_TRANSACTION_LOG_VIEW_H

#include "file-dotlock.h"
#include "mail-transaction-log.h"

#define MAIL_TRANSACTION_LOG_ROTATE_SIZE (1024*128)
#define MAIL_TRANSACTION_LOG_ROTATE_TIME (60*5)

#define MAIL_TRANSACTION_LOG_FILE_IN_MEMORY(file) ((file)->fd == -1)

struct mail_transaction_log_file {
    struct mail_transaction_log *log;
        struct mail_transaction_log_file *next;

    int refcount;

    char *filepath;
    int fd;

    ino_t st_ino;
    dev_t st_dev;
    time_t last_mtime;
    uoff_t last_size;

    buffer_t *buffer;
    uoff_t buffer_offset;
    void *mmap_base;
    size_t mmap_size;

    struct mail_transaction_log_header hdr;
    uoff_t sync_offset;
    uint32_t first_append_size;

    unsigned int locked:1;
};

struct mail_transaction_log {
    struct mail_index *index;
        struct mail_transaction_log_view *views;
    /* head is the latest log file. tail is a linked list of older
       files. head isn't part of that linked list at all (ugh) */
    struct mail_transaction_log_file *head, *tail;

    unsigned int dotlock_count;
        struct dotlock_settings dotlock_settings, new_dotlock_settings;
    struct dotlock *dotlock;
};

void
mail_transaction_log_file_set_corrupted(struct mail_transaction_log_file *file,
                    const char *fmt, ...)
    __attr_format__(2, 3);

int mail_transaction_log_file_find(struct mail_transaction_log *log,
                   uint32_t file_seq,
                   struct mail_transaction_log_file **file_r);

int mail_transaction_log_file_map(struct mail_transaction_log_file *file,
                  uoff_t start_offset, uoff_t end_offset);

void mail_transaction_logs_clean(struct mail_transaction_log *log);

int mail_transaction_log_rotate(struct mail_transaction_log *log, bool lock);
int mail_transaction_log_lock_head(struct mail_transaction_log *log);
void mail_transaction_log_file_unlock(struct mail_transaction_log_file *file);

#endif