diff options
Diffstat (limited to 'src/include/storage/buf_internals.h')
| -rw-r--r-- | src/include/storage/buf_internals.h | 117 |
1 files changed, 58 insertions, 59 deletions
diff --git a/src/include/storage/buf_internals.h b/src/include/storage/buf_internals.h index aea48e15cb1..482b15d9d10 100644 --- a/src/include/storage/buf_internals.h +++ b/src/include/storage/buf_internals.h @@ -6,7 +6,7 @@ * * Copyright (c) 1994, Regents of the University of California * - * $Id: buf_internals.h,v 1.15 1997/09/07 05:00:52 momjian Exp $ + * $Id: buf_internals.h,v 1.16 1997/09/08 02:38:57 momjian Exp $ * * NOTE * If BUFFERPAGE0 is defined, then 0 will be used as a @@ -22,11 +22,11 @@ /* Buf Mgr constants */ /* in bufmgr.c */ -extern int NBuffers; -extern int Data_Descriptors; -extern int Free_List_Descriptor; -extern int Lookup_List_Descriptor; -extern int Num_Descriptors; +extern int NBuffers; +extern int Data_Descriptors; +extern int Free_List_Descriptor; +extern int Lookup_List_Descriptor; +extern int Num_Descriptors; /* * Flags for buffer descriptors @@ -40,19 +40,19 @@ extern int Num_Descriptors; #define BM_IO_ERROR (1 << 6) #define BM_JUST_DIRTIED (1 << 7) -typedef bits16 BufFlags; +typedef bits16 BufFlags; typedef struct sbufdesc BufferDesc; typedef struct sbufdesc BufferHdr; typedef struct buftag BufferTag; /* long * so alignment will be correct */ -typedef long **BufferBlock; +typedef long **BufferBlock; struct buftag { - LRelId relId; - BlockNumber blockNum; /* blknum relative to begin of reln */ + LRelId relId; + BlockNumber blockNum; /* blknum relative to begin of reln */ }; #define CLEAR_BUFFERTAG(a)\ @@ -110,45 +110,44 @@ struct buftag */ struct sbufdesc_unpadded { - Buffer freeNext; - Buffer freePrev; - SHMEM_OFFSET data; - BufferTag tag; - int buf_id; - BufFlags flags; - int16 bufsmgr; - unsigned refcount; + Buffer freeNext; + Buffer freePrev; + SHMEM_OFFSET data; + BufferTag tag; + int buf_id; + BufFlags flags; + int16 bufsmgr; + unsigned refcount; #ifdef HAS_TEST_AND_SET - slock_t io_in_progress_lock; + slock_t io_in_progress_lock; #endif /* HAS_TEST_AND_SET */ - char sb_dbname[NAMEDATALEN]; + char sb_dbname[NAMEDATALEN]; /* NOTE NO PADDING OF THE MEMBER HERE */ - char sb_relname[NAMEDATALEN]; + char sb_relname[NAMEDATALEN]; }; /* THE REAL STRUCTURE - the structure above must match it, minus sb_pad */ struct sbufdesc { - Buffer freeNext; /* link for freelist chain */ - Buffer freePrev; - SHMEM_OFFSET data; /* pointer to data in buf pool */ + Buffer freeNext; /* link for freelist chain */ + Buffer freePrev; + SHMEM_OFFSET data; /* pointer to data in buf pool */ /* tag and id must be together for table lookup to work */ - BufferTag tag; /* file/block identifier */ - int buf_id; /* maps global desc to local desc */ + BufferTag tag; /* file/block identifier */ + int buf_id; /* maps global desc to local desc */ - BufFlags flags; /* described below */ - int16 bufsmgr; /* storage manager id for buffer */ - unsigned refcount; /* # of times buffer is pinned */ + BufFlags flags; /* described below */ + int16 bufsmgr; /* storage manager id for buffer */ + unsigned refcount; /* # of times buffer is pinned */ #ifdef HAS_TEST_AND_SET /* can afford a dedicated lock if test-and-set locks are available */ - slock_t io_in_progress_lock; + slock_t io_in_progress_lock; #endif /* HAS_TEST_AND_SET */ - char sb_dbname[NAMEDATALEN]; /* name of db in which buf - * belongs */ + char sb_dbname[NAMEDATALEN]; /* name of db in which buf belongs */ /* * I padded this structure to a power of 2 (PADDED_SBUFDESC_SIZE) @@ -167,8 +166,8 @@ struct sbufdesc * something important */ - char sb_relname[NAMEDATALEN + /* name of reln */ - PADDED_SBUFDESC_SIZE - sizeof(struct sbufdesc_unpadded)]; + char sb_relname[NAMEDATALEN + /* name of reln */ + PADDED_SBUFDESC_SIZE - sizeof(struct sbufdesc_unpadded)]; }; /* @@ -180,19 +179,19 @@ struct sbufdesc typedef struct _bmtrace { - int bmt_pid; - long bmt_buf; - long bmt_dbid; - long bmt_relid; - int bmt_blkno; - int bmt_op; + int bmt_pid; + long bmt_buf; + long bmt_dbid; + long bmt_relid; + int bmt_blkno; + int bmt_op; #define BMT_NOTUSED 0 #define BMT_ALLOCFND 1 #define BMT_ALLOCNOTFND 2 #define BMT_DEALLOC 3 -} bmtrace; +} bmtrace; #endif /* BMTRACE */ @@ -204,39 +203,39 @@ typedef struct _bmtrace /* Internal routines: only called by buf.c */ /*freelist.c*/ -extern void AddBufferToFreelist(BufferDesc * bf); -extern void PinBuffer(BufferDesc * buf); -extern void PinBuffer_Debug(char *file, int line, BufferDesc * buf); -extern void UnpinBuffer(BufferDesc * buf); +extern void AddBufferToFreelist(BufferDesc * bf); +extern void PinBuffer(BufferDesc * buf); +extern void PinBuffer_Debug(char *file, int line, BufferDesc * buf); +extern void UnpinBuffer(BufferDesc * buf); extern BufferDesc *GetFreeBuffer(void); -extern void InitFreeList(bool init); +extern void InitFreeList(bool init); /* buf_table.c */ -extern void InitBufTable(void); +extern void InitBufTable(void); extern BufferDesc *BufTableLookup(BufferTag * tagPtr); -extern bool BufTableDelete(BufferDesc * buf); -extern bool BufTableInsert(BufferDesc * buf); +extern bool BufTableDelete(BufferDesc * buf); +extern bool BufTableInsert(BufferDesc * buf); /* bufmgr.c */ extern BufferDesc *BufferDescriptors; extern BufferBlock BufferBlocks; -extern long *PrivateRefCount; -extern long *LastRefCount; -extern long *CommitInfoNeedsSave; +extern long *PrivateRefCount; +extern long *LastRefCount; +extern long *CommitInfoNeedsSave; extern SPINLOCK BufMgrLock; /* localbuf.c */ -extern long *LocalRefCount; +extern long *LocalRefCount; extern BufferDesc *LocalBufferDescriptors; -extern int NLocBuffer; +extern int NLocBuffer; extern BufferDesc * LocalBufferAlloc(Relation reln, BlockNumber blockNum, bool * foundPtr); -extern int WriteLocalBuffer(Buffer buffer, bool release); -extern int FlushLocalBuffer(Buffer buffer, bool release); -extern void InitLocalBuffer(void); -extern void LocalBufferSync(void); -extern void ResetLocalBufferPool(void); +extern int WriteLocalBuffer(Buffer buffer, bool release); +extern int FlushLocalBuffer(Buffer buffer, bool release); +extern void InitLocalBuffer(void); +extern void LocalBufferSync(void); +extern void ResetLocalBufferPool(void); #endif /* BUFMGR_INTERNALS_H */ |