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Diffstat (limited to 'innobase/include/trx0undo.ic')
| -rw-r--r-- | innobase/include/trx0undo.ic | 323 |
1 files changed, 0 insertions, 323 deletions
diff --git a/innobase/include/trx0undo.ic b/innobase/include/trx0undo.ic deleted file mode 100644 index a04b234b495..00000000000 --- a/innobase/include/trx0undo.ic +++ /dev/null @@ -1,323 +0,0 @@ -/****************************************************** -Transaction undo log - -(c) 1996 Innobase Oy - -Created 3/26/1996 Heikki Tuuri -*******************************************************/ - -#include "data0type.h" - -/*************************************************************************** -Builds a roll pointer dulint. */ -UNIV_INLINE -dulint -trx_undo_build_roll_ptr( -/*====================*/ - /* out: roll pointer */ - ibool is_insert, /* in: TRUE if insert undo log */ - ulint rseg_id, /* in: rollback segment id */ - ulint page_no, /* in: page number */ - ulint offset) /* in: offset of the undo entry within page */ -{ - ut_ad(DATA_ROLL_PTR_LEN == 7); - ut_ad(rseg_id < 128); - - return(ut_dulint_create(is_insert * 128 * 256 * 256 - + rseg_id * 256 * 256 - + (page_no / 256) / 256, - (page_no % (256 * 256)) * 256 * 256 - + offset)); -} - -/*************************************************************************** -Decodes a roll pointer dulint. */ -UNIV_INLINE -void -trx_undo_decode_roll_ptr( -/*=====================*/ - dulint roll_ptr, /* in: roll pointer */ - ibool* is_insert, /* out: TRUE if insert undo log */ - ulint* rseg_id, /* out: rollback segment id */ - ulint* page_no, /* out: page number */ - ulint* offset) /* out: offset of the undo entry within page */ -{ - ulint low; - ulint high; - - ut_ad(DATA_ROLL_PTR_LEN == 7); - ut_ad(TRUE == 1); - - high = ut_dulint_get_high(roll_ptr); - low = ut_dulint_get_low(roll_ptr); - - *offset = low % (256 * 256); - - *is_insert = high / (256 * 256 * 128); /* TRUE == 1 */ - *rseg_id = (high / (256 * 256)) % 128; - - *page_no = (high % (256 * 256)) * 256 * 256 - + (low / 256) / 256; -} - -/*************************************************************************** -Returns TRUE if the roll pointer is of the insert type. */ -UNIV_INLINE -ibool -trx_undo_roll_ptr_is_insert( -/*========================*/ - /* out: TRUE if insert undo log */ - dulint roll_ptr) /* in: roll pointer */ -{ - ulint high; - - ut_ad(DATA_ROLL_PTR_LEN == 7); - ut_ad(TRUE == 1); - - high = ut_dulint_get_high(roll_ptr); - - return(high / (256 * 256 * 128)); -} - -/********************************************************************* -Writes a roll ptr to an index page. In case that the size changes in -some future version, this function should be used instead of -mach_write_... */ -UNIV_INLINE -void -trx_write_roll_ptr( -/*===============*/ - byte* ptr, /* in: pointer to memory where written */ - dulint roll_ptr) /* in: roll ptr */ -{ - ut_ad(DATA_ROLL_PTR_LEN == 7); - - mach_write_to_7(ptr, roll_ptr); -} - -/********************************************************************* -Reads a roll ptr from an index page. In case that the roll ptr size -changes in some future version, this function should be used instead of -mach_read_... */ -UNIV_INLINE -dulint -trx_read_roll_ptr( -/*==============*/ - /* out: roll ptr */ - byte* ptr) /* in: pointer to memory from where to read */ -{ - ut_ad(DATA_ROLL_PTR_LEN == 7); - - return(mach_read_from_7(ptr)); -} - -/********************************************************************** -Gets an undo log page and x-latches it. */ -UNIV_INLINE -page_t* -trx_undo_page_get( -/*===============*/ - /* out: pointer to page x-latched */ - ulint space, /* in: space where placed */ - ulint page_no, /* in: page number */ - mtr_t* mtr) /* in: mtr */ -{ - page_t* page; - - page = buf_page_get(space, page_no, RW_X_LATCH, mtr); - -#ifdef UNIV_SYNC_DEBUG - buf_page_dbg_add_level(page, SYNC_TRX_UNDO_PAGE); -#endif /* UNIV_SYNC_DEBUG */ - - return(page); -} - -/********************************************************************** -Gets an undo log page and s-latches it. */ -UNIV_INLINE -page_t* -trx_undo_page_get_s_latched( -/*=========================*/ - /* out: pointer to page s-latched */ - ulint space, /* in: space where placed */ - ulint page_no, /* in: page number */ - mtr_t* mtr) /* in: mtr */ -{ - page_t* page; - - page = buf_page_get(space, page_no, RW_S_LATCH, mtr); - -#ifdef UNIV_SYNC_DEBUG - buf_page_dbg_add_level(page, SYNC_TRX_UNDO_PAGE); -#endif /* UNIV_SYNC_DEBUG */ - - return(page); -} - -/********************************************************************** -Returns the start offset of the undo log records of the specified undo -log on the page. */ -UNIV_INLINE -ulint -trx_undo_page_get_start( -/*====================*/ - /* out: start offset */ - page_t* undo_page,/* in: undo log page */ - ulint page_no,/* in: undo log header page number */ - ulint offset) /* in: undo log header offset on page */ -{ - ulint start; - - if (page_no == buf_frame_get_page_no(undo_page)) { - - start = mach_read_from_2(offset + undo_page - + TRX_UNDO_LOG_START); - } else { - start = TRX_UNDO_PAGE_HDR + TRX_UNDO_PAGE_HDR_SIZE; - } - - return(start); -} - -/********************************************************************** -Returns the end offset of the undo log records of the specified undo -log on the page. */ -UNIV_INLINE -ulint -trx_undo_page_get_end( -/*==================*/ - /* out: end offset */ - page_t* undo_page,/* in: undo log page */ - ulint page_no,/* in: undo log header page number */ - ulint offset) /* in: undo log header offset on page */ -{ - trx_ulogf_t* log_hdr; - ulint end; - - if (page_no == buf_frame_get_page_no(undo_page)) { - - log_hdr = undo_page + offset; - - end = mach_read_from_2(log_hdr + TRX_UNDO_NEXT_LOG); - - if (end == 0) { - end = mach_read_from_2(undo_page + TRX_UNDO_PAGE_HDR - + TRX_UNDO_PAGE_FREE); - } - } else { - end = mach_read_from_2(undo_page + TRX_UNDO_PAGE_HDR - + TRX_UNDO_PAGE_FREE); - } - - return(end); -} - -/********************************************************************** -Returns the previous undo record on the page in the specified log, or -NULL if none exists. */ -UNIV_INLINE -trx_undo_rec_t* -trx_undo_page_get_prev_rec( -/*=======================*/ - /* out: pointer to record, NULL if none */ - trx_undo_rec_t* rec, /* in: undo log record */ - ulint page_no,/* in: undo log header page number */ - ulint offset) /* in: undo log header offset on page */ -{ - page_t* undo_page; - ulint start; - - undo_page = buf_frame_align(rec); - - start = trx_undo_page_get_start(undo_page, page_no, offset); - - if (start + undo_page == rec) { - - return(NULL); - } - - return(undo_page + mach_read_from_2(rec - 2)); -} - -/********************************************************************** -Returns the next undo log record on the page in the specified log, or -NULL if none exists. */ -UNIV_INLINE -trx_undo_rec_t* -trx_undo_page_get_next_rec( -/*=======================*/ - /* out: pointer to record, NULL if none */ - trx_undo_rec_t* rec, /* in: undo log record */ - ulint page_no,/* in: undo log header page number */ - ulint offset) /* in: undo log header offset on page */ -{ - page_t* undo_page; - ulint end; - ulint next; - - undo_page = buf_frame_align(rec); - - end = trx_undo_page_get_end(undo_page, page_no, offset); - - next = mach_read_from_2(rec); - - if (next == end) { - - return(NULL); - } - - return(undo_page + next); -} - -/********************************************************************** -Returns the last undo record on the page in the specified undo log, or -NULL if none exists. */ -UNIV_INLINE -trx_undo_rec_t* -trx_undo_page_get_last_rec( -/*=======================*/ - /* out: pointer to record, NULL if none */ - page_t* undo_page,/* in: undo log page */ - ulint page_no,/* in: undo log header page number */ - ulint offset) /* in: undo log header offset on page */ -{ - ulint start; - ulint end; - - start = trx_undo_page_get_start(undo_page, page_no, offset); - end = trx_undo_page_get_end(undo_page, page_no, offset); - - if (start == end) { - - return(NULL); - } - - return(undo_page + mach_read_from_2(undo_page + end - 2)); -} - -/********************************************************************** -Returns the first undo record on the page in the specified undo log, or -NULL if none exists. */ -UNIV_INLINE -trx_undo_rec_t* -trx_undo_page_get_first_rec( -/*========================*/ - /* out: pointer to record, NULL if none */ - page_t* undo_page,/* in: undo log page */ - ulint page_no,/* in: undo log header page number */ - ulint offset) /* in: undo log header offset on page */ -{ - ulint start; - ulint end; - - start = trx_undo_page_get_start(undo_page, page_no, offset); - end = trx_undo_page_get_end(undo_page, page_no, offset); - - if (start == end) { - - return(NULL); - } - - return(undo_page + start); -} |