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98 lines
4.1 KiB
98 lines
4.1 KiB
2 years ago
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/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* Copyright 1997 - July 2008 CWI, August 2008 - 2022 MonetDB B.V.
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*/
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#ifndef _GDK_BBP_H_
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#define _GDK_BBP_H_
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#define BBPLOADED 1 /* set if bat in memory */
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#define BBPSWAPPED 2 /* set if dirty bat is not in memory */
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#define BBPTMP 4 /* set if non-persistent bat has image on disk */
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/* These 4 symbols indicate what the persistence state is of a bat.
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* - If the bat was persistent at the last commit (or at startup
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* before the first commit), BBPEXISTING or BBPDELETED is set.
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* - If the bat is to be persistent after the next commit, BBPEXISTING
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* or BBPNEW is set (i.e. (status&BBPPERSISTENT) != 0).
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* - If the bat was transient at the last commit (or didn't exist),
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* BBPNEW is set, or none of these flag values is set.
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* - If the bat is to be transient at the next commit, BBPDELETED is
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* set, or none of these flag values is set.
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* BATmode() switches between BBPDELETED and BBPEXISTING (bat was
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* persistent at last commit), or between BBPNEW and 0 (bat was
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* transient or didn't exist at last commit).
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* Committing a bat switches from BBPNEW to BBPEXISTING, or turns off
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* BBPDELETED.
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* In any case, only at most one of BBPDELETED, BBPEXISTING, and
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* BBPNEW may be set at any one time.
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*
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* In short,
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* BBPEXISTING -- bat was and should remain persistent;
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* BBPDELETED -- bat was persistent at last commit and should be transient;
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* BBPNEW -- bat was transient at last commit and should be persistent;
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* none of the above -- bat was and should remain transient.
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*/
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#define BBPDELETED 16 /* set if bat persistent at last commit is now transient */
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#define BBPEXISTING 32 /* set if bat was already persistent at end of last commit */
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#define BBPNEW 64 /* set if bat has become persistent since last commit */
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#define BBPPERSISTENT (BBPEXISTING|BBPNEW) /* mask for currently persistent bats */
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#define BBPSTATUS 127
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#define BBPUNLOADING 128 /* set while we are unloading */
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#define BBPLOADING 256 /* set while we are loading */
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#define BBPSAVING 512 /* set while we are saving */
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#define BBPRENAMED 1024 /* set when bat is renamed in this transaction */
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#define BBPDELETING 2048 /* set while we are deleting (special case in module unload) */
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#define BBPHOT 4096 /* bat is "hot", i.e. is still in active use */
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#define BBPSYNCING 8192 /* bat between creating backup and saving */
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#define BBPUNSTABLE (BBPUNLOADING|BBPDELETING) /* set while we are unloading */
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#define BBPWAITING (BBPUNLOADING|BBPLOADING|BBPSAVING|BBPDELETING|BBPSYNCING)
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#define BBPTRIM_ALL (((size_t)1) << (sizeof(size_t)*8 - 2)) /* very large positive size_t */
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gdk_export bat getBBPsize(void); /* current occupied size of BBP array */
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gdk_export lng getBBPlogno(void); /* two lng of extra info in BBP.dir */
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gdk_export lng getBBPtransid(void);
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/* global calls */
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gdk_export gdk_return BBPaddfarm(const char *dirname, uint32_t rolemask, bool logerror);
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/* update interface */
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gdk_export int BBPreclaim(BAT *b);
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gdk_export gdk_return BBPsave(BAT *b);
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gdk_export int BBPrename(bat bid, const char *nme);
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/* query interface */
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gdk_export bat BBPindex(const char *nme);
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gdk_export BAT *BBPdescriptor(bat b);
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/* swapping interface */
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gdk_export gdk_return BBPsync(int cnt, bat *restrict subcommit, BUN *restrict sizes, lng logno, lng transid);
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gdk_export int BBPfix(bat b);
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gdk_export int BBPunfix(bat b);
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gdk_export int BBPretain(bat b);
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gdk_export int BBPrelease(bat b);
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gdk_export void BBPkeepref(bat i);
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gdk_export void BBPshare(bat b);
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gdk_export void BBPcold(bat i);
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#define BBP_status_set(bid, mode) \
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ATOMIC_SET(&BBP_record(bid).status, mode)
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#define BBP_status_on(bid, flags) \
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ATOMIC_OR(&BBP_record(bid).status, flags)
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#define BBP_status_off(bid, flags) \
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ATOMIC_AND(&BBP_record(bid).status, ~(flags))
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#define BBPswappable(b) ((b) && (b)->batCacheid && BBP_refs((b)->batCacheid) == 0)
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#define BBPtrimmable(b) (BBPswappable(b) && isVIEW(b) == 0 && (BBP_status((b)->batCacheid)&BBPWAITING) == 0)
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#endif /* _GDK_BBP_H_ */
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