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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:19:15 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:19:15 +0000 |
commit | 6eb9c5a5657d1fe77b55cc261450f3538d35a94d (patch) | |
tree | 657d8194422a5daccecfd42d654b8a245ef7b4c8 /src/include/storage/sharedfileset.h | |
parent | Initial commit. (diff) | |
download | postgresql-13-upstream.tar.xz postgresql-13-upstream.zip |
Adding upstream version 13.4.upstream/13.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/include/storage/sharedfileset.h')
-rw-r--r-- | src/include/storage/sharedfileset.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/include/storage/sharedfileset.h b/src/include/storage/sharedfileset.h new file mode 100644 index 0000000..2d6cf07 --- /dev/null +++ b/src/include/storage/sharedfileset.h @@ -0,0 +1,45 @@ +/*------------------------------------------------------------------------- + * + * sharedfileset.h + * Shared temporary file management. + * + * + * Portions Copyright (c) 1996-2020, 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 |