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- /*-------------------------------------------------------------------------
- *
- * sharedfileset.h
- * Shared temporary file management.
- *
- *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
- * Portions Copyright (c) 1994, Regents of the University of California
- *
- * src/include/storage/sharedfileset.h
- *
- *-------------------------------------------------------------------------
- */
-
- #ifndef SHAREDFILESET_H
- #define SHAREDFILESET_H
-
- #include "storage/dsm.h"
- #include "storage/fd.h"
- #include "storage/spin.h"
-
- /*
- * A set of temporary files that can be shared by multiple backends.
- */
- typedef struct SharedFileSet
- {
- pid_t creator_pid; /* PID of the creating process */
- uint32 number; /* per-PID identifier */
- slock_t mutex; /* mutex protecting the reference count */
- int refcnt; /* number of attached backends */
- int ntablespaces; /* number of tablespaces to use */
- Oid tablespaces[8]; /* OIDs of tablespaces to use. Assumes that
- * it's rare that there more than temp
- * tablespaces. */
- } SharedFileSet;
-
- extern void SharedFileSetInit(SharedFileSet *fileset, dsm_segment *seg);
- extern void SharedFileSetAttach(SharedFileSet *fileset, dsm_segment *seg);
- extern File SharedFileSetCreate(SharedFileSet *fileset, const char *name);
- extern File SharedFileSetOpen(SharedFileSet *fileset, const char *name);
- extern bool SharedFileSetDelete(SharedFileSet *fileset, const char *name,
- bool error_on_failure);
- extern void SharedFileSetDeleteAll(SharedFileSet *fileset);
-
- #endif
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