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more tdb

This commit is contained in:
Hongze Cheng 2022-01-20 08:03:33 +00:00
parent 2394e0e0ff
commit 9f3d9db127
2 changed files with 49 additions and 1 deletions
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43
source/libs/tdb/src/db/tdb_mpool.c
View File

@ -16,6 +16,7 @@
#include "tdb_mpool.h"
static int tdbGnrtFileID(const char *fname, uint8_t *fileid);
static void tdbMpoolRegFile(TDB_MPOOL *mp, TDB_MPFILE *mpf);
int tdbMPoolOpen(TDB_MPOOL **mpp, uint64_t cachesize, pgsize_t pgsize) {
TDB_MPOOL *mp = NULL;
@ -118,6 +119,9 @@ int tdbMPoolFileOpen(TDB_MPFILE **mpfp, const char *fname, TDB_MPOOL *mp) {
goto _err;
}
// Register current MPF to MP
tdbMpoolRegFile(mp, mpf);
*mpfp = mpf;
return 0;
@ -138,6 +142,41 @@ int tdbMPoolFileClose(TDB_MPFILE *mpf) {
return 0;
}
int tdbMPoolFileGet(TDB_MPFILE *mpf, pgno_t pgid, void *addr) {
pg_t * pagep;
TDB_MPOOL *mp;
mp = mpf->mp;
// get page in the cache
if (pagep) {
// page is found in the page table
// todo: pin the page and return
*(void **)addr = pagep->data;
return 0;
} else {
// page not found
pagep = TD_DLIST_HEAD(&mp->freeList);
if (pagep) {
// TD_DLIST_POP(&(mp->freeList), pagep);
} else {
// no page found in the freelist, need to evict
// pagep = tdbMpoolEvict(mp);
if (pagep) {
} else {
// TODO: Cannot find a page to evict
}
}
}
return 0;
}
int tdbMPoolFilePut(TDB_MPOOL *mpf, pgno_t pgid, void *addr) {
// TODO
return 0;
}
static int tdbGnrtFileID(const char *fname, uint8_t *fileid) {
struct stat statbuf;
@ -153,3 +192,7 @@ static int tdbGnrtFileID(const char *fname, uint8_t *fileid) {
return 0;
}
static void tdbMpoolRegFile(TDB_MPOOL *mp, TDB_MPFILE *mpf) {
// TODO
}

5
source/libs/tdb/src/inc/tdb_mpool.h
View File

@ -51,6 +51,10 @@ struct TDB_MPOOL {
int32_t nbucket;
pg_list_t *hashtab;
} pgtab; // page table, hash<pgid_t, pg_t>
struct {
int32_t nbucket;
TD_DLIST(TDB_MPFILE) hashtab[8];
} mpftab;
};
#define MP_PAGE_AT(mp, idx) (mp)->pages[idx]
@ -60,6 +64,7 @@ struct TDB_MPFILE {
int fd; // fd
uint8_t fileid[TDB_FILE_ID_LEN]; // file ID
TDB_MPOOL *mp; // underlying memory pool
TD_DLIST_NODE(TDB_MPFILE);
};
/*=================================================== Exposed apis ==================================================*/