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/* Copyright (c) 2007 PrimeBase Technologies GmbH
*
* PrimeBase XT
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* 2007-11-12 Paul McCullagh
*
* H&G2JCtL
*
* Restart and write data to the database.
*/
#ifndef __restart_xt_h__
#define __restart_xt_h__
#include "pthread_xt.h"
#include "filesys_xt.h"
#include "sortedlist_xt.h"
#include "util_xt.h"
#include "xactlog_xt.h"
struct XTThread;
struct XTOpenTable;
struct XTDatabase;
struct XTTable;
extern int pbxt_recovery_state;
typedef struct XTWriterState {
struct XTDatabase *ws_db;
xtBool ws_in_recover;
xtLogID ws_ind_rec_log_id;
xtLogOffset ws_ind_rec_log_offset;
XTXactSeqReadRec ws_seqread;
XTDataBufferRec ws_databuf;
XTInfoBufferRec ws_rec_buf;
xtTableID ws_tab_gone; /* Cache the ID of the last table that does not exist. */
struct XTOpenTable *ws_ot;
} XTWriterStateRec, *XTWriterStatePtr;
#define XT_CHECKPOINT_VERSION 1
typedef struct XTXlogCheckpoint {
XTDiskValue2 xcp_checksum_2; /* The checksum of the all checkpoint data. */
XTDiskValue4 xcp_head_size_4;
XTDiskValue2 xcp_version_2; /* The version of the checkpoint record. */
XTDiskValue6 xcp_chkpnt_no_6; /* Incremented for each checkpoint. */
XTDiskValue4 xcp_log_id_4; /* The restart log ID. */
XTDiskValue6 xcp_log_offs_6; /* The restart log offset. */
XTDiskValue4 xcp_tab_id_4; /* The current high table ID. */
XTDiskValue4 xcp_xact_id_4; /* The current high transaction ID. */
XTDiskValue4 xcp_ind_rec_log_id_4; /* The index recovery log ID. */
XTDiskValue6 xcp_ind_rec_log_offs_6; /* The index recovery log offset. */
XTDiskValue2 xcp_log_count_2; /* Number of logs to be deleted in the area below. */
XTDiskValue2 xcp_del_log[XT_VAR_LENGTH];
} XTXlogCheckpointDRec, *XTXlogCheckpointDPtr;
typedef struct XTXactRestart {
struct XTDatabase *xres_db;
int xres_next_res_no; /* The next restart file to be written. */
xtLogID xres_cp_log_id; /* Log number of the last checkpoint. */
xtLogOffset xres_cp_log_offset; /* Log offset of the last checkpoint */
xtBool xres_cp_required; /* Checkpoint required (startup and shutdown). */
xtWord8 xres_cp_number; /* The checkpoint number (used to decide which is the latest checkpoint). */
public:
void xres_init(struct XTThread *self, struct XTDatabase *db, xtLogID *log_id, xtLogOffset *log_offset, xtLogID *max_log_id);
void xres_exit(struct XTThread *self);
xtBool xres_is_checkpoint_pending(xtLogID log_id, xtLogOffset log_offset);
void xres_checkpoint_pending(xtLogID log_id, xtLogOffset log_offset);
xtBool xres_checkpoint(struct XTThread *self);
void xres_name(size_t size, char *path, xtLogID log_id);
private:
xtBool xres_check_checksum(XTXlogCheckpointDPtr buffer, size_t size);
void xres_recover_progress(XTThreadPtr self, XTOpenFilePtr *of, int perc);
xtBool xres_restart(struct XTThread *self, xtLogID *log_id, xtLogOffset *log_offset, xtLogID ind_rec_log_id, off_t ind_rec_log_offset, xtLogID *max_log_id);
off_t xres_bytes_to_read(struct XTThread *self, struct XTDatabase *db, u_int *log_count, xtLogID *max_log_id);
} XTXactRestartRec, *XTXactRestartPtr;
typedef struct XTCheckPointState {
xtBool cp_inited; /* TRUE if structure was inited */
xt_mutex_type cp_state_lock; /* Lock and the entire checkpoint state. */
xtBool cp_running; /* TRUE if a checkpoint is running. */
xtLogID cp_log_id;
xtLogOffset cp_log_offset;
xtLogID cp_ind_rec_log_id;
xtLogOffset cp_ind_rec_log_offset;
XTSortedListPtr cp_table_ids; /* List of tables to be flushed for the checkpoint. */
u_int cp_flush_count; /* The number of tables flushed. */
u_int cp_next_to_flush; /* The next table to be flushed. */
} XTCheckPointStateRec, *XTCheckPointStatePtr;
#define XT_CPT_NONE_FLUSHED 0
#define XT_CPT_REC_ROW_FLUSHED 1
#define XT_CPT_INDEX_FLUSHED 2
#define XT_CPT_ALL_FLUSHED (XT_CPT_REC_ROW_FLUSHED | XT_CPT_INDEX_FLUSHED)
typedef struct XTCheckPointTable {
u_int cpt_flushed;
xtTableID cpt_tab_id;
} XTCheckPointTableRec, *XTCheckPointTablePtr;
void xt_xres_init(struct XTThread *self, struct XTDatabase *db);
void xt_xres_exit(struct XTThread *self, struct XTDatabase *db);
void xt_xres_init_tab(struct XTThread *self, struct XTTable *tab);
void xt_xres_exit_tab(struct XTThread *self, struct XTTable *tab);
void xt_xres_apply_in_order(struct XTThread *self, XTWriterStatePtr ws, xtLogID log_id, xtLogOffset log_offset, XTXactLogBufferDPtr record);
xtBool xt_begin_checkpoint(struct XTDatabase *db, xtBool have_table_lock, struct XTThread *thread);
xtBool xt_end_checkpoint(struct XTDatabase *db, struct XTThread *thread, xtBool *checkpoint_done);
void xt_start_checkpointer(struct XTThread *self, struct XTDatabase *db);
void xt_wait_for_checkpointer(struct XTThread *self, struct XTDatabase *db);
void xt_stop_checkpointer(struct XTThread *self, struct XTDatabase *db);
void xt_wake_checkpointer(struct XTThread *self, struct XTDatabase *db);
void xt_free_writer_state(struct XTThread *self, XTWriterStatePtr ws);
xtWord8 xt_bytes_since_last_checkpoint(struct XTDatabase *db, xtLogID curr_log_id, xtLogOffset curr_log_offset);
void xt_print_log_record(xtLogID log, off_t offset, XTXactLogBufferDPtr record);
void xt_dump_xlogs(struct XTDatabase *db, xtLogID start_log);
void xt_xres_start_database_recovery(XTThreadPtr self);
void xt_xres_terminate_recovery(XTThreadPtr self);
void xt_start_flusher(struct XTThread *self, struct XTDatabase *db);
void xt_stop_flusher(struct XTThread *self, struct XTDatabase *db);
#define XT_RECOVER_PENDING 0
#define XT_RECOVER_DONE 1
#define XT_RECOVER_SWEPT 2
inline void xt_xres_wait_for_recovery(XTThreadPtr XT_UNUSED(self), int state)
{
while (pbxt_recovery_state < state)
xt_sleep_milli_second(100);
}
#endif
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