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Docs/manual.texi: Added Innobase documentation configure.in: Incremented version include/my_base.h: Added option for Innobase myisam/mi_check.c: cleanup mysql-test/t/bdb.test: cleanup mysql-test/t/innobase.test: Extended with new tests from bdb.test mysql-test/t/merge.test: Added test of SHOW create mysys/my_init.c: Fix for UNIXWARE 7 scripts/mysql_install_db.sh: Always write how to start mysqld scripts/safe_mysqld.sh: Fixed type sql/ha_innobase.cc: Update to new version sql/ha_innobase.h: Update to new version sql/handler.h: Added 'update_table_comment()' and 'append_create_info()' sql/sql_delete.cc: Fixes for Innobase sql/sql_select.cc: Fixes for Innobase sql/sql_show.cc: Append create information (for MERGE tables) sql/sql_update.cc: Fixes for Innobase
112 lines
2.7 KiB
Text
112 lines
2.7 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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trx_rsegf_t* header;
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header = TRX_RSEG + buf_page_get(space, page_no, RW_X_LATCH, mtr);
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buf_page_dbg_add_level(header, SYNC_RSEG_HEADER);
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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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trx_rsegf_t* header;
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header = TRX_RSEG + buf_page_get(space, page_no, RW_X_LATCH, mtr);
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buf_page_dbg_add_level(header, SYNC_RSEG_HEADER_NEW);
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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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ut_ad(n < TRX_RSEG_N_SLOTS);
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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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ut_ad(n < TRX_RSEG_N_SLOTS);
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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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