Line data    Source code

       1             : /*
       2             :  * SPDX-License-Identifier: MPL-2.0
       3             :  *
       4             :  * This Source Code Form is subject to the terms of the Mozilla Public
       5             :  * License, v. 2.0.  If a copy of the MPL was not distributed with this
       6             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       7             :  *
       8             :  * Copyright 2024 MonetDB Foundation;
       9             :  * Copyright August 2008 - 2023 MonetDB B.V.;
      10             :  * Copyright 1997 - July 2008 CWI.
      11             :  */
      12             : 
      13             : #ifndef _GDK_BBP_H_
      14             : #define _GDK_BBP_H_
      15             : 
      16             : #define BBPLOADED       1       /* set if bat in memory */
      17             : #define BBPSWAPPED      2       /* set if dirty bat is not in memory */
      18             : #define BBPTMP          4       /* set if non-persistent bat has image on disk */
      19             : 
      20             : /* These 4 symbols indicate what the persistence state is of a bat.
      21             :  * - If the bat was persistent at the last commit (or at startup
      22             :  *   before the first commit), BBPEXISTING or BBPDELETED is set.
      23             :  * - If the bat is to be persistent after the next commit, BBPEXISTING
      24             :  *   or BBPNEW is set (i.e. (status&BBPPERSISTENT) != 0).
      25             :  * - If the bat was transient at the last commit (or didn't exist),
      26             :  *   BBPNEW is set, or none of these flag values is set.
      27             :  * - If the bat is to be transient at the next commit, BBPDELETED is
      28             :  *   set, or none of these flag values is set.
      29             :  * BATmode() switches between BBPDELETED and BBPEXISTING (bat was
      30             :  * persistent at last commit), or between BBPNEW and 0 (bat was
      31             :  * transient or didn't exist at last commit).
      32             :  * Committing a bat switches from BBPNEW to BBPEXISTING, or turns off
      33             :  * BBPDELETED.
      34             :  * In any case, only at most one of BBPDELETED, BBPEXISTING, and
      35             :  * BBPNEW may be set at any one time.
      36             :  *
      37             :  * In short,
      38             :  * BBPEXISTING -- bat was and should remain persistent;
      39             :  * BBPDELETED -- bat was persistent at last commit and should be transient;
      40             :  * BBPNEW -- bat was transient at last commit and should be persistent;
      41             :  * none of the above -- bat was and should remain transient.
      42             :  */
      43             : #define BBPDELETED      16      /* set if bat persistent at last commit is now transient */
      44             : #define BBPEXISTING     32      /* set if bat was already persistent at end of last commit */
      45             : #define BBPNEW          64      /* set if bat has become persistent since last commit */
      46             : #define BBPPERSISTENT   (BBPEXISTING|BBPNEW)    /* mask for currently persistent bats */
      47             : 
      48             : #define BBPSTATUS       127
      49             : 
      50             : #define BBPUNLOADING    128     /* set while we are unloading */
      51             : #define BBPLOADING      256     /* set while we are loading */
      52             : #define BBPSAVING       512     /* set while we are saving */
      53             : #define BBPRENAMED      1024    /* set when bat is renamed in this transaction */
      54             : #define BBPDELETING     2048    /* set while we are deleting (special case in module unload) */
      55             : #define BBPHOT          4096    /* bat is "hot", i.e. is still in active use */
      56             : #define BBPSYNCING      8192    /* bat between creating backup and saving */
      57             : 
      58             : #define BBPUNSTABLE     (BBPUNLOADING|BBPDELETING)      /* set while we are unloading */
      59             : #define BBPWAITING      (BBPUNLOADING|BBPLOADING|BBPSAVING|BBPDELETING|BBPSYNCING)
      60             : 
      61             : #define BBPTRIM_ALL     (((size_t)1) << (sizeof(size_t)*8 - 2))   /* very large positive size_t */
      62             : 
      63             : gdk_export bat getBBPsize(void); /* current occupied size of BBP array */
      64             : gdk_export unsigned BBPheader(FILE *fp, int *lineno, bat *bbpsize, lng *logno, bool allow_hge_upgrade);
      65             : gdk_export int BBPreadBBPline(FILE *fp, unsigned bbpversion, int *lineno, BAT *bn,
      66             : #ifdef GDKLIBRARY_HASHASH
      67             :                               int *hashash,
      68             : #endif
      69             :                               char *batname, char *filename, char **options);
      70             : 
      71             : /* global calls */
      72             : gdk_export gdk_return BBPaddfarm(const char *dirname, uint32_t rolemask, bool logerror);
      73             : 
      74             : /* update interface */
      75             : gdk_export gdk_return BBPsave(BAT *b);
      76             : gdk_export int BBPrename(BAT *b, const char *nme);
      77             : 
      78             : /* query interface */
      79             : gdk_export bat BBPindex(const char *nme);
      80             : 
      81             : /* swapping interface */
      82             : gdk_export int BBPfix(bat b);
      83             : gdk_export int BBPunfix(bat b);
      84             : static inline void
      85    64719529 : BBPreclaim(BAT *b)
      86             : {
      87    61846183 :         if (b != NULL)
      88    59770413 :                 BBPunfix(b->batCacheid);
      89     1645609 : }
      90             : gdk_export int BBPretain(bat b);
      91             : gdk_export int BBPrelease(bat b);
      92             : gdk_export void BBPkeepref(BAT *b)
      93             :         __attribute__((__nonnull__(1)));
      94             : gdk_export void BBPcold(bat i);
      95             : gdk_export void BBPrelinquishbats(void);
      96             : #ifdef GDKLIBRARY_JSON
      97             : typedef gdk_return ((*json_storage_conversion)(char **, const char **));
      98             : gdk_export gdk_return BBPjson_upgrade(json_storage_conversion);
      99             : #endif
     100             : #define BBP_status_set(bid, mode)                       \
     101             :         ATOMIC_SET(&BBP_record(bid).status, mode)
     102             : 
     103             : #define BBP_status_on(bid, flags)                       \
     104             :         ATOMIC_OR(&BBP_record(bid).status, flags)
     105             : 
     106             : #define BBP_status_off(bid, flags)                      \
     107             :         ATOMIC_AND(&BBP_record(bid).status, ~(flags))
     108             : 
     109             : #define BBPswappable(b) ((b) && (b)->batCacheid && BBP_refs((b)->batCacheid) == 0)
     110             : #define BBPtrimmable(b) (BBPswappable(b) && isVIEW(b) == 0 && (BBP_status((b)->batCacheid)&BBPWAITING) == 0)
     111             : 
     112             : #endif /* _GDK_BBP_H_ */