mirror of
https://github.com/berkeleydb/libdb.git
synced 2024-11-16 17:16:25 +00:00
135 lines
3.8 KiB
D
Executable file
135 lines
3.8 KiB
D
Executable file
/*
|
|
* See the file LICENSE for redistribution information.
|
|
*
|
|
* Copyright (c) 2010 Oracle and/or its affiliates. All rights reserved.
|
|
*
|
|
* dbdefs.d - DTrace declarations of DB data structures.
|
|
*/
|
|
#ifndef _DBDEFS_D
|
|
#define _DBDEFS_D
|
|
|
|
typedef D`uint32_t db_pgno_t;
|
|
typedef D`uint16_t db_indx_t;
|
|
|
|
typedef D`uintptr_t roff_t;
|
|
typedef D`int32_t db_atomic_t;
|
|
|
|
/* A DBT for the DB API */
|
|
typedef struct __db_dbt {
|
|
uintptr_t data; /* Key/data */
|
|
uint32_t size; /* key/data length */
|
|
|
|
uint32_t ulen; /* RO: length of user buffer. */
|
|
uint32_t dlen; /* RO: get/put record length. */
|
|
uint32_t doff; /* RO: get/put record offset. */
|
|
|
|
uintptr_t app_data;
|
|
uint32_t flags;
|
|
} DBT;
|
|
|
|
/* A DBT in shared memory */
|
|
typedef struct __sh_dbt {
|
|
uint32_t size; /* key/data length */
|
|
roff_t off; /* Region offset. */
|
|
} SH_DBT;
|
|
|
|
|
|
/*
|
|
* DB fileids are actually uint8_t fileid[20]; in D it is easier to handle them
|
|
* as a struct of 5 four-byte integers.
|
|
*/
|
|
typedef struct fileid
|
|
{
|
|
uint32_t id1;
|
|
uint32_t id2;
|
|
uint32_t id3;
|
|
uint32_t id4;
|
|
uint32_t id5;
|
|
} FILEID;
|
|
|
|
typedef struct __db_lock_ilock {
|
|
uint32_t pgno;
|
|
FILEID fileid;
|
|
uint32_t type;
|
|
} DB_ILOCK;
|
|
|
|
typedef struct {
|
|
uint32_t file;
|
|
uint32_t offset;
|
|
} DB_LSN;
|
|
|
|
typedef struct {
|
|
D`ssize_t stqe_next; /* relative offset of next element */
|
|
ssize_t stqe_prev; /* relative offset of prev's next */
|
|
} SH_TAILQ_ENTRY;
|
|
|
|
typedef struct {
|
|
ssize_t sce_next; /* relative offset to next element */
|
|
ssize_t sce_prev; /* relative offset of prev element */
|
|
} SH_CHAIN_ENTRY;
|
|
|
|
typedef struct _db_page {
|
|
DB_LSN lsn; /* 00-07: Log sequence number. */
|
|
db_pgno_t pgno; /* 08-11: Current page number. */
|
|
db_pgno_t prev_pgno; /* 12-15: Previous page number. */
|
|
db_pgno_t next_pgno; /* 16-19: Next page number. */
|
|
db_indx_t entries; /* 20-21: Number of items on the page. */
|
|
db_indx_t hf_offset; /* 22-23: High free byte page offset. */
|
|
|
|
#define LEAFLEVEL 1
|
|
#define MAXBTREELEVEL 255
|
|
D`uint8_t level; /* 24: Btree tree level. */
|
|
uint8_t type; /* 25: Page type. */
|
|
} PAGE;
|
|
|
|
typedef struct __bh {
|
|
uint32_t mtx_buf; /* Shared/Exclusive mutex */
|
|
db_atomic_t ref; /* Reference count. */
|
|
#define BH_CALLPGIN 0x001 /* Convert the page before use. */
|
|
#define BH_DIRTY 0x002 /* Page is modified. */
|
|
#define BH_DIRTY_CREATE 0x004 /* Page is modified. */
|
|
#define BH_DISCARD 0x008 /* Page is useless. */
|
|
#define BH_EXCLUSIVE 0x010 /* Exclusive access acquired. */
|
|
#define BH_FREED 0x020 /* Page was freed. */
|
|
#define BH_FROZEN 0x040 /* Frozen buffer: allocate & re-read. */
|
|
#define BH_TRASH 0x080 /* Page is garbage. */
|
|
#define BH_THAWED 0x100 /* Page was thawed. */
|
|
uint16_t flags;
|
|
|
|
uint32_t priority; /* Priority. */
|
|
SH_TAILQ_ENTRY hq; /* MPOOL hash bucket queue. */
|
|
|
|
db_pgno_t pgno; /* Underlying MPOOLFILE page number. */
|
|
roff_t mf_offset; /* Associated MPOOLFILE offset. */
|
|
uint32_t bucket; /* Hash bucket containing header. */
|
|
int region; /* Region containing header. */
|
|
|
|
roff_t td_off; /* MVCC: creating TXN_DETAIL offset. */
|
|
SH_CHAIN_ENTRY vc; /* MVCC: version chain. */
|
|
#ifdef DIAG_MVCC
|
|
uint16_t align_off; /* Alignment offset for diagnostics.*/
|
|
#endif
|
|
|
|
/*
|
|
* !!!
|
|
* This array must be at least size_t aligned -- the DB access methods
|
|
* put PAGE and other structures into it, and then access them directly.
|
|
* (We guarantee size_t alignment to applications in the documentation,
|
|
* too.)
|
|
*/
|
|
uint8_t buf[1]; /* Variable length data. */
|
|
} BH;
|
|
|
|
typedef enum {
|
|
DB_LOCK_NG=0, /* Not granted. */
|
|
DB_LOCK_READ=1, /* Shared/read. */
|
|
DB_LOCK_WRITE=2, /* Exclusive/write. */
|
|
DB_LOCK_WAIT=3, /* Wait for event */
|
|
DB_LOCK_IWRITE=4, /* Intent exclusive/write. */
|
|
DB_LOCK_IREAD=5, /* Intent to share/read. */
|
|
DB_LOCK_IWR=6, /* Intent to read and write. */
|
|
DB_LOCK_READ_UNCOMMITTED=7, /* Degree 1 isolation. */
|
|
DB_LOCK_WWRITE=8 /* Was Written. */
|
|
} db_lockmode_t;
|
|
|
|
#endif
|