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

	mail-index-transaction-private.h revision 4b89231f4ec9cc69f4aea715e1d34f405c7e317d
#ifndef MAIL_INDEX_TRANSACTION_PRIVATE_H
#define MAIL_INDEX_TRANSACTION_PRIVATE_H

#include "seq-range-array.h"
#include "mail-transaction-log.h"

ARRAY_DEFINE_TYPE(seq_array_array, ARRAY_TYPE(seq_array));

struct mail_index_transaction_keyword_update {
    ARRAY_TYPE(seq_range) add_seq;
    ARRAY_TYPE(seq_range) remove_seq;
};

struct mail_index_transaction_ext_hdr_update {
    size_t alloc_size;
    /* mask is in bytes, not bits */
    unsigned char *mask;
    unsigned char *data;
};

struct mail_index_transaction_vfuncs {
    void (*reset)(struct mail_index_transaction *t);
    int (*commit)(struct mail_index_transaction *t,
              uint32_t *log_file_seq_r, uoff_t *log_file_offset_r);
    void (*rollback)(struct mail_index_transaction *t);
};

union mail_index_transaction_module_context {
    struct mail_index_module_register *reg;
};

struct mail_index_transaction {
    int refcount;

    enum mail_index_transaction_flags flags;
    struct mail_index_transaction_vfuncs v;
    struct mail_index_view *view;

    /* NOTE: If you add anything new, remember to update
       mail_index_transaction_reset_v() to reset it. */
        ARRAY_DEFINE(appends, struct mail_index_record);
    uint32_t first_new_seq, last_new_seq;
    uint32_t highest_append_uid;
    /* lowest/highest sequence that updates flags/keywords */
    uint32_t min_flagupdate_seq, max_flagupdate_seq;

    ARRAY_DEFINE(modseq_updates, struct mail_transaction_modseq_update);
    ARRAY_DEFINE(uid_updates, struct mail_transaction_uid_update);
    ARRAY_DEFINE(expunges, struct mail_transaction_expunge_guid);
    ARRAY_DEFINE(updates, struct mail_transaction_flag_update);
    size_t last_update_idx;

    unsigned char pre_hdr_change[sizeof(struct mail_index_header)];
    unsigned char pre_hdr_mask[sizeof(struct mail_index_header)];
    unsigned char post_hdr_change[sizeof(struct mail_index_header)];
    unsigned char post_hdr_mask[sizeof(struct mail_index_header)];

    ARRAY_DEFINE(ext_hdr_updates,
             struct mail_index_transaction_ext_hdr_update);
    ARRAY_TYPE(seq_array_array) ext_rec_updates;
    ARRAY_TYPE(seq_array_array) ext_rec_atomics;
    ARRAY_DEFINE(ext_resizes, struct mail_transaction_ext_intro);
    ARRAY_DEFINE(ext_resets, struct mail_transaction_ext_reset);
    ARRAY_DEFINE(ext_reset_ids, uint32_t);
    ARRAY_DEFINE(ext_reset_atomic, uint32_t);

    ARRAY_DEFINE(keyword_updates,
             struct mail_index_transaction_keyword_update);
    ARRAY_TYPE(seq_range) keyword_resets;

    uint64_t min_highest_modseq;
    uint64_t max_modseq;
    ARRAY_TYPE(seq_range) *conflict_seqs;

    /* Module-specific contexts. */
    ARRAY_DEFINE(module_contexts,
             union mail_index_transaction_module_context *);

    unsigned int no_appends:1;

    unsigned int sync_transaction:1;
    unsigned int appends_nonsorted:1;
    unsigned int expunges_nonsorted:1;
    unsigned int drop_unnecessary_flag_updates:1;
    unsigned int pre_hdr_changed:1;
    unsigned int post_hdr_changed:1;
    unsigned int reset:1;
    /* non-extension updates. flag updates don't change this because
       they may be added and removed, so be sure to check that the updates
       array is non-empty also. */
    unsigned int log_updates:1;
    /* extension updates */
    unsigned int log_ext_updates:1;
};

#define MAIL_INDEX_TRANSACTION_HAS_CHANGES(t) \
    ((t)->log_updates || (t)->log_ext_updates || \
     (array_is_created(&(t)->updates) && array_count(&(t)->updates) > 0))

extern void (*hook_mail_index_transaction_created)
        (struct mail_index_transaction *t);

struct mail_index_record *
mail_index_transaction_lookup(struct mail_index_transaction *t, uint32_t seq);

void mail_index_transaction_ref(struct mail_index_transaction *t);
void mail_index_transaction_unref(struct mail_index_transaction **t);
void mail_index_transaction_reset_v(struct mail_index_transaction *t);

void mail_index_transaction_sort_appends(struct mail_index_transaction *t);
void mail_index_transaction_sort_expunges(struct mail_index_transaction *t);
uint32_t mail_index_transaction_get_next_uid(struct mail_index_transaction *t);
void mail_index_transaction_set_log_updates(struct mail_index_transaction *t);
void mail_index_update_day_headers(struct mail_index_transaction *t);

unsigned int
mail_index_transaction_get_flag_update_pos(struct mail_index_transaction *t,
                       unsigned int left_idx,
                       unsigned int right_idx,
                       uint32_t seq);

bool mail_index_cancel_flag_updates(struct mail_index_transaction *t,
                    uint32_t seq);
bool mail_index_cancel_keyword_updates(struct mail_index_transaction *t,
                       uint32_t seq);

int mail_index_transaction_finish(struct mail_index_transaction *t);
void mail_index_transaction_export(struct mail_index_transaction *t,
                   struct mail_transaction_log_append_ctx *append_ctx);
int mail_transaction_expunge_guid_cmp(const struct mail_transaction_expunge_guid *e1,
                      const struct mail_transaction_expunge_guid *e2);
unsigned int
mail_index_transaction_get_flag_update_pos(struct mail_index_transaction *t,
                       unsigned int left_idx,
                       unsigned int right_idx,
                       uint32_t seq);

#endif