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5669dc3d2a
btr_block_get(): New function to return buf_block_t. btr_page_alloc(), buf_page_get_release_on_io(), buf_page_get_gen(), buf_page_create(), fseg_create(), fseg_create_general(): Return buf_block_t. buf_page_get_known_nowait(): Expect buf_block_t instead of buf_frame_t. buf_frame_get_newest_modification(): Replace with buf_block_get_newest_modification(). buf_page_dbg_add_level(): Replace with buf_block_dbg_add_level(). buf_block_get_zip_size(): New function. buf_block_get_page_zip(): Reintroduce. recv_recover_page(): Replace page, space, page_no with block. ibuf_bitmap_page_init(): Replace page, zip_size with block. ibuf_parse_bitmap_init(): Remove the parameter zip_size. btr_search_drop_page_hash_index(): Replace page with block.
128 lines
3.2 KiB
Text
128 lines
3.2 KiB
Text
/******************************************************
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Rollback segment
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(c) 1996 Innobase Oy
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Created 3/26/1996 Heikki Tuuri
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*******************************************************/
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#include "srv0srv.h"
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/**********************************************************************
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Gets a rollback segment header. */
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UNIV_INLINE
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trx_rsegf_t*
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trx_rsegf_get(
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/*==========*/
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/* out: rollback segment header, page
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x-latched */
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ulint space, /* in: space where placed */
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ulint page_no, /* in: page number of the header */
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mtr_t* mtr) /* in: mtr */
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{
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buf_block_t* block;
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trx_rsegf_t* header;
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block = buf_page_get(space, page_no, RW_X_LATCH, mtr);
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#ifdef UNIV_SYNC_DEBUG
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buf_block_dbg_add_level(block, SYNC_RSEG_HEADER);
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#endif /* UNIV_SYNC_DEBUG */
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header = TRX_RSEG + buf_block_get_frame(block);
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return(header);
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}
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/**********************************************************************
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Gets a newly created rollback segment header. */
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UNIV_INLINE
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trx_rsegf_t*
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trx_rsegf_get_new(
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/*==============*/
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/* out: rollback segment header, page
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x-latched */
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ulint space, /* in: space where placed */
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ulint page_no, /* in: page number of the header */
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mtr_t* mtr) /* in: mtr */
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{
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buf_block_t* block;
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trx_rsegf_t* header;
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block = buf_page_get(space, page_no, RW_X_LATCH, mtr);
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#ifdef UNIV_SYNC_DEBUG
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buf_block_dbg_add_level(block, SYNC_RSEG_HEADER_NEW);
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#endif /* UNIV_SYNC_DEBUG */
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header = TRX_RSEG + buf_block_get_frame(block);
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return(header);
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}
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/*******************************************************************
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Gets the file page number of the nth undo log slot. */
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UNIV_INLINE
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ulint
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trx_rsegf_get_nth_undo(
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/*===================*/
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/* out: page number of the undo log segment */
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trx_rsegf_t* rsegf, /* in: rollback segment header */
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ulint n, /* in: index of slot */
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mtr_t* mtr) /* in: mtr */
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{
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if (UNIV_UNLIKELY(n >= TRX_RSEG_N_SLOTS)) {
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fprintf(stderr,
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"InnoDB: Error: trying to get slot %lu of rseg\n",
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(ulong) n);
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ut_error;
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}
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return(mtr_read_ulint(rsegf + TRX_RSEG_UNDO_SLOTS
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+ n * TRX_RSEG_SLOT_SIZE, MLOG_4BYTES, mtr));
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}
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/*******************************************************************
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Sets the file page number of the nth undo log slot. */
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UNIV_INLINE
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void
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trx_rsegf_set_nth_undo(
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/*===================*/
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trx_rsegf_t* rsegf, /* in: rollback segment header */
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ulint n, /* in: index of slot */
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ulint page_no,/* in: page number of the undo log segment */
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mtr_t* mtr) /* in: mtr */
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{
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if (UNIV_UNLIKELY(n >= TRX_RSEG_N_SLOTS)) {
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fprintf(stderr,
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"InnoDB: Error: trying to set slot %lu of rseg\n",
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(ulong) n);
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ut_error;
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}
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mlog_write_ulint(rsegf + TRX_RSEG_UNDO_SLOTS + n * TRX_RSEG_SLOT_SIZE,
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page_no, MLOG_4BYTES, mtr);
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}
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/********************************************************************
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Looks for a free slot for an undo log segment. */
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UNIV_INLINE
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ulint
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trx_rsegf_undo_find_free(
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/*=====================*/
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/* out: slot index or ULINT_UNDEFINED if not
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found */
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trx_rsegf_t* rsegf, /* in: rollback segment header */
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mtr_t* mtr) /* in: mtr */
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{
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ulint i;
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ulint page_no;
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for (i = 0; i < TRX_RSEG_N_SLOTS; i++) {
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page_no = trx_rsegf_get_nth_undo(rsegf, i, mtr);
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if (page_no == FIL_NULL) {
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return(i);
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}
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}
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return(ULINT_UNDEFINED);
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}
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