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Editing: sharedfileset.h
/*------------------------------------------------------------------------- * * sharedfileset.h * Shared temporary file management. * * * Portions Copyright (c) 1996-2018, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * src/include/storage/sharedfilespace.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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