Added Innobase to source distribution

1 files changed, 178 insertions, 0 deletions

diff --git a/innobase/include/mtr0log.h b/innobase/include/mtr0log.h
new file mode 100644
index 00000000000..acbf87df447
--- /dev/null
+++ b/innobase/include/mtr0log.h
@@ -0,0 +1,178 @@
+/******************************************************
+Mini-transaction logging routines
+
+(c) 1995 Innobase Oy
+
+Created 12/7/1995 Heikki Tuuri
+*******************************************************/
+
+#ifndef mtr0log_h
+#define mtr0log_h
+
+#include "univ.i"
+#include "mtr0mtr.h"
+
+/************************************************************
+Writes 1 - 4 bytes to a file page buffered in the buffer pool.
+Writes the corresponding log record to the mini-transaction log. */
+
+void
+mlog_write_ulint(
+/*=============*/
+	byte*	ptr,	/* in: pointer where to write */
+	ulint	val,	/* in: value to write */
+	byte	type,	/* in: MLOG_1BYTE, MLOG_2BYTES, MLOG_4BYTES */
+	mtr_t*	mtr);	/* in: mini-transaction handle */
+/************************************************************
+Writes 8 bytes to a file page buffered in the buffer pool.
+Writes the corresponding log record to the mini-transaction log. */
+
+void
+mlog_write_dulint(
+/*==============*/
+	byte*	ptr,	/* in: pointer where to write */
+	dulint	val,	/* in: value to write */
+	byte	type,	/* in: MLOG_8BYTES */
+	mtr_t*	mtr);	/* in: mini-transaction handle */
+/************************************************************
+Writes a string to a file page buffered in the buffer pool. Writes the
+corresponding log record to the mini-transaction log. */
+
+void
+mlog_write_string(
+/*==============*/
+	byte*	ptr,	/* in: pointer where to write */
+	byte*	str,	/* in: string to write */
+	ulint	len,	/* in: string length */
+	mtr_t*	mtr);	/* in: mini-transaction handle */
+/************************************************************
+Writes initial part of a log record consisting of one-byte item
+type and four-byte space and page numbers. */
+
+void
+mlog_write_initial_log_record(
+/*==========================*/
+	byte*	ptr,	/* in: pointer to (inside) a buffer frame
+			holding the file page where modification
+			is made */
+	byte	type,	/* in: log item type: MLOG_1BYTE, ... */
+	mtr_t*	mtr);	/* in: mini-transaction handle */
+/************************************************************
+Catenates 1 - 4 bytes to the mtr log. */
+UNIV_INLINE
+void
+mlog_catenate_ulint(
+/*================*/
+	mtr_t*	mtr,	/* in: mtr */
+	ulint	val,	/* in: value to write */
+	ulint	type);	/* in: MLOG_1BYTE, MLOG_2BYTES, MLOG_4BYTES */
+/************************************************************
+Catenates n bytes to the mtr log. */
+
+void
+mlog_catenate_string(
+/*=================*/
+	mtr_t*	mtr,	/* in: mtr */
+	byte*	str,	/* in: string to write */
+	ulint	len);	/* in: string length */
+/************************************************************
+Catenates a compressed ulint to mlog. */
+UNIV_INLINE
+void
+mlog_catenate_ulint_compressed(
+/*===========================*/
+	mtr_t*	mtr,	/* in: mtr */
+	ulint	val);	/* in: value to write */
+/************************************************************
+Catenates a compressed dulint to mlog. */
+UNIV_INLINE
+void
+mlog_catenate_dulint_compressed(
+/*============================*/
+	mtr_t*	mtr,	/* in: mtr */
+	dulint	val);	/* in: value to write */
+/************************************************************
+Opens a buffer to mlog. It must be closed with mlog_close. */
+UNIV_INLINE
+byte*
+mlog_open(
+/*======*/
+			/* out: buffer, NULL if log mode MTR_LOG_NONE */
+	mtr_t*	mtr,	/* in: mtr */
+	ulint	size);	/* in: buffer size in bytes */
+/************************************************************
+Closes a buffer opened to mlog. */
+UNIV_INLINE
+void
+mlog_close(
+/*=======*/
+	mtr_t*	mtr,	/* in: mtr */
+	byte*	ptr);	/* in: buffer space from ptr up was not used */
+/************************************************************
+Writes the initial part of a log record. */
+UNIV_INLINE
+byte*
+mlog_write_initial_log_record_fast(
+/*===============================*/
+			/* out: new value of log_ptr */
+	byte*	ptr,	/* in: pointer to (inside) a buffer frame holding the
+			file page where modification is made */
+	byte	type,	/* in: log item type: MLOG_1BYTE, ... */
+	byte*	log_ptr,/* in: pointer to mtr log which has been opened */
+	mtr_t*	mtr);	/* in: mtr */
+/****************************************************************
+Writes the contents of a mini-transaction log, if any, to the database log. */
+
+dulint
+mlog_write(
+/*=======*/
+	dyn_array_t*	mlog,		/* in: mlog */
+	ibool*		modifications);	/* out: TRUE if there were 
+					log items to write */
+/************************************************************
+Parses an initial log record written by mlog_write_initial_log_record. */
+
+byte*
+mlog_parse_initial_log_record(
+/*==========================*/
+			/* out: parsed record end, NULL if not a complete
+			record */
+	byte*	ptr,	/* in: buffer */
+	byte*	end_ptr,/* in: buffer end */
+	byte*	type,	/* out: log record type: MLOG_1BYTE, ... */
+	ulint*	space,	/* out: space id */
+	ulint*	page_no);/* out: page number */
+/************************************************************
+Parses a log record written by mlog_write_ulint or mlog_write_dulint. */
+
+byte*
+mlog_parse_nbytes(
+/*==============*/
+			/* out: parsed record end, NULL if not a complete
+			record */
+	ulint	type,	/* in: log record type: MLOG_1BYTE, ... */
+	byte*	ptr,	/* in: buffer */
+	byte*	end_ptr,/* in: buffer end */
+	byte*	page);	/* in: page where to apply the log record, or NULL */
+/************************************************************
+Parses a log record written by mlog_write_string. */
+
+byte*
+mlog_parse_string(
+/*==============*/
+			/* out: parsed record end, NULL if not a complete
+			record */
+	byte*	ptr,	/* in: buffer */
+	byte*	end_ptr,/* in: buffer end */
+	byte*	page);	/* in: page where to apply the log record, or NULL */
+
+
+/* Insert, update, and maybe other functions may use this value to define an
+extra mlog buffer size for variable size data */
+#define MLOG_BUF_MARGIN	256
+
+#ifndef UNIV_NONINL
+#include "mtr0log.ic"
+#endif
+
+#endif