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Diffstat (limited to 'src/include/storage/sharedfileset.h')
-rw-r--r-- | src/include/storage/sharedfileset.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/include/storage/sharedfileset.h b/src/include/storage/sharedfileset.h new file mode 100644 index 0000000..b1cde36 --- /dev/null +++ b/src/include/storage/sharedfileset.h @@ -0,0 +1,37 @@ +/*------------------------------------------------------------------------- + * + * sharedfileset.h + * Shared temporary file management. + * + * + * Portions Copyright (c) 1996-2022, 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/fileset.h" +#include "storage/spin.h" + +/* + * A set of temporary files that can be shared by multiple backends. + */ +typedef struct SharedFileSet +{ + FileSet fs; + slock_t mutex; /* mutex protecting the reference count */ + int refcnt; /* number of attached backends */ +} SharedFileSet; + +extern void SharedFileSetInit(SharedFileSet *fileset, dsm_segment *seg); +extern void SharedFileSetAttach(SharedFileSet *fileset, dsm_segment *seg); +extern void SharedFileSetDeleteAll(SharedFileSet *fileset); + +#endif |