diff options
Diffstat (limited to 'src/include/storage/shmem.h')
| -rw-r--r-- | src/include/storage/shmem.h | 86 |
1 files changed, 45 insertions, 41 deletions
diff --git a/src/include/storage/shmem.h b/src/include/storage/shmem.h index fb52742d362..5812a718717 100644 --- a/src/include/storage/shmem.h +++ b/src/include/storage/shmem.h @@ -1,16 +1,16 @@ /*------------------------------------------------------------------------- * * shmem.h-- - * shared memory management structures + * shared memory management structures * * * Copyright (c) 1994, Regents of the University of California * - * $Id: shmem.h,v 1.5 1997/08/19 21:40:01 momjian Exp $ + * $Id: shmem.h,v 1.6 1997/09/07 05:01:35 momjian Exp $ * *------------------------------------------------------------------------- */ -#ifndef SHMEM_H +#ifndef SHMEM_H #define SHMEM_H #include <utils/hsearch.h> @@ -22,11 +22,12 @@ * offsets relative to the start of the shared memory region(s). */ typedef unsigned long SHMEM_OFFSET; + #define INVALID_OFFSET (-1) #define BAD_LOCATION (-1) /* start of the lowest shared memory region. For now, assume that - * there is only one shared memory region + * there is only one shared memory region */ extern SHMEM_OFFSET ShmemBase; @@ -51,54 +52,57 @@ extern SPINLOCK ShmemLock; extern SPINLOCK BindingLock; /* shmemqueue.c */ -typedef struct SHM_QUEUE { - SHMEM_OFFSET prev; - SHMEM_OFFSET next; -} SHM_QUEUE; +typedef struct SHM_QUEUE +{ + SHMEM_OFFSET prev; + SHMEM_OFFSET next; +} SHM_QUEUE; /* shmem.c */ -extern void ShmemBindingTabReset(void); -extern void ShmemCreate(unsigned int key, unsigned int size); -extern int InitShmem(unsigned int key, unsigned int size); -extern long *ShmemAlloc(unsigned long size); -extern int ShmemIsValid(unsigned long addr); -extern HTAB *ShmemInitHash(char *name, long init_size, long max_size, - HASHCTL *infoP, int hash_flags); -extern bool ShmemPIDLookup(int pid, SHMEM_OFFSET* locationPtr); +extern void ShmemBindingTabReset(void); +extern void ShmemCreate(unsigned int key, unsigned int size); +extern int InitShmem(unsigned int key, unsigned int size); +extern long *ShmemAlloc(unsigned long size); +extern int ShmemIsValid(unsigned long addr); +extern HTAB * +ShmemInitHash(char *name, long init_size, long max_size, + HASHCTL * infoP, int hash_flags); +extern bool ShmemPIDLookup(int pid, SHMEM_OFFSET * locationPtr); extern SHMEM_OFFSET ShmemPIDDestroy(int pid); -extern long *ShmemInitStruct(char *name, unsigned long size, - bool *foundPtr); -extern bool TransactionIdIsInProgress (TransactionId xid); +extern long * +ShmemInitStruct(char *name, unsigned long size, + bool * foundPtr); +extern bool TransactionIdIsInProgress(TransactionId xid); -typedef int TableID; +typedef int TableID; /* size constants for the binding table */ - /* max size of data structure string name */ -#define BTABLE_KEYSIZE (50) - /* data in binding table hash bucket */ + /* max size of data structure string name */ +#define BTABLE_KEYSIZE (50) + /* data in binding table hash bucket */ #define BTABLE_DATASIZE (sizeof(BindingEnt) - BTABLE_KEYSIZE) - /* maximum size of the binding table */ -#define BTABLE_SIZE (100) + /* maximum size of the binding table */ +#define BTABLE_SIZE (100) /* this is a hash bucket in the binding table */ -typedef struct { - char key[BTABLE_KEYSIZE]; /* string name */ - unsigned long location; /* location in shared mem */ - unsigned long size; /* numbytes allocated for the - * structure - */ -} BindingEnt; +typedef struct +{ + char key[BTABLE_KEYSIZE]; /* string name */ + unsigned long location; /* location in shared mem */ + unsigned long size; /* numbytes allocated for the structure */ +} BindingEnt; /* * prototypes for functions in shmqueue.c */ -extern void SHMQueueInit(SHM_QUEUE *queue); -extern void SHMQueueElemInit(SHM_QUEUE *queue); -extern void SHMQueueDelete(SHM_QUEUE *queue); -extern void SHMQueueInsertTL(SHM_QUEUE *queue, SHM_QUEUE *elem); -extern void SHMQueueFirst(SHM_QUEUE *queue, Pointer *nextPtrPtr, - SHM_QUEUE *nextQueue); -extern bool SHMQueueEmpty(SHM_QUEUE *queue); - -#endif /* SHMEM_H */ +extern void SHMQueueInit(SHM_QUEUE * queue); +extern void SHMQueueElemInit(SHM_QUEUE * queue); +extern void SHMQueueDelete(SHM_QUEUE * queue); +extern void SHMQueueInsertTL(SHM_QUEUE * queue, SHM_QUEUE * elem); +extern void +SHMQueueFirst(SHM_QUEUE * queue, Pointer * nextPtrPtr, + SHM_QUEUE * nextQueue); +extern bool SHMQueueEmpty(SHM_QUEUE * queue); + +#endif /* SHMEM_H */ |