lib-storage/index/index-transaction.c

	index-transaction.c revision a2f250a332dfc1e6cd4ffd196c621eb9dbf7b8a1
/* Copyright (c) 2003-2008 Dovecot authors, see the included COPYING file */

#include "lib.h"
#include "array.h"
#include "index-storage.h"
#include "index-mail.h"

void index_transaction_init(struct index_transaction_context *t,
                struct index_mailbox *ibox)
{
    t->mailbox_ctx.box = &ibox->box;
    t->ibox = ibox;

    array_create(&t->mailbox_ctx.module_contexts, default_pool,
             sizeof(void *), 5);

    t->trans_view = mail_index_transaction_open_updated_view(t->trans);
    t->cache_view = mail_cache_view_open(ibox->cache, t->trans_view);
    t->cache_trans = mail_cache_get_transaction(t->cache_view, t->trans);
}

static void index_transaction_free(struct index_transaction_context *t)
{
    mail_cache_view_close(t->cache_view);
    mail_index_view_close(&t->trans_view);
    array_free(&t->mailbox_ctx.module_contexts);
    i_free(t);
}

int index_transaction_finish_commit(struct index_transaction_context *t,
                    uint32_t *log_file_seq_r,
                    uoff_t *log_file_offset_r)
{
    int ret;

    i_assert(t->mail_ref_count == 0);

    ret = t->super.commit(t->trans, log_file_seq_r, log_file_offset_r);
    if (ret < 0)
        mail_storage_set_index_error(t->ibox);
    else {
        if (*log_file_seq_r != 0) {
            t->ibox->commit_log_file_seq = *log_file_seq_r;
            t->ibox->commit_log_file_offset = *log_file_offset_r;
        }
    }

    index_transaction_free(t);
    return ret;
}

void index_transaction_finish_rollback(struct index_transaction_context *t)
{
    i_assert(t->mail_ref_count == 0);

    t->super.rollback(t->trans);
    index_transaction_free(t);
}

struct mailbox_transaction_context *
index_transaction_begin(struct mailbox *box,
            enum mailbox_transaction_flags flags)
{
    struct index_mailbox *ibox = (struct index_mailbox *)box;
    struct mail_index_transaction *t;
    struct index_transaction_context *it;
    enum mail_index_transaction_flags trans_flags;

    if (!box->opened)
        index_storage_mailbox_open(ibox);

    trans_flags = MAIL_INDEX_TRANSACTION_FLAG_AVOID_FLAG_UPDATES;
    if ((flags & MAILBOX_TRANSACTION_FLAG_HIDE) != 0)
        trans_flags |= MAIL_INDEX_TRANSACTION_FLAG_HIDE;
    if ((flags & MAILBOX_TRANSACTION_FLAG_EXTERNAL) != 0)
        trans_flags |= MAIL_INDEX_TRANSACTION_FLAG_EXTERNAL;
    t = mail_index_transaction_begin(ibox->view, trans_flags);

    it = MAIL_STORAGE_CONTEXT(t);
    if (it == NULL) {
        i_panic("mail storage transaction context mising for type %s",
            box->storage->name);
    }
    it->flags = flags;
    return &it->mailbox_ctx;
}

int index_transaction_commit(struct mailbox_transaction_context *_t,
                 uint32_t *uid_validity_r,
                 uint32_t *first_saved_uid_r,
                 uint32_t *last_saved_uid_r)
{
    struct index_transaction_context *t =
        (struct index_transaction_context *)_t;
    struct mail_index_transaction *itrans = t->trans;
    uint32_t seq;
    uoff_t offset;

    *uid_validity_r = 0;
    *first_saved_uid_r = *last_saved_uid_r = 0;

    t->saved_uid_validity = uid_validity_r;
    t->first_saved_uid = first_saved_uid_r;
    t->last_saved_uid = last_saved_uid_r;

    return mail_index_transaction_commit(&itrans, &seq, &offset);
}

void index_transaction_rollback(struct mailbox_transaction_context *_t)
{
    struct index_transaction_context *t =
        (struct index_transaction_context *)_t;
    struct mail_index_transaction *itrans = t->trans;

    mail_index_transaction_rollback(&itrans);
}