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refact TDB

This commit is contained in:
Hongze Cheng 2022-02-15 07:37:39 +00:00
parent 1bcb109800
commit da49669a2b
1 changed files with 31 additions and 36 deletions
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67
source/libs/tdb/src/db/tdbPgCache.c
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@ -18,10 +18,10 @@ typedef TD_DLIST_NODE(SPage) SPgListNode;
struct SPage {
pgid_t pgid; // page id
frame_id_t frameid; // frame id
uint8_t * pData; // real data
SPgListNode freeNode; // for SPgCache.freeList
SPgListNode pghtNode; // for pght
SPgListNode lruNode; // for LRU
uint8_t * pData; // real data
};
typedef TD_DLIST(SPage) SPgList;
@ -29,7 +29,7 @@ struct SPgCache {
TENV * pEnv; // TENV containing this page cache
pgsz_t pgsize;
int32_t npage;
SPage * pages;
SPage **pages;
SPgList freeList;
SPgList lru;
struct {
@ -44,59 +44,58 @@ static void pgCacheUnpinPage(SPage *pPage);
int pgCacheOpen(SPgCache **ppPgCache, TENV *pEnv) {
SPgCache *pPgCache;
SPage * pPage;
void * pData;
pgsz_t pgSize;
cachesz_t cacheSize;
int32_t npage;
int32_t nbucket;
size_t msize;
*ppPgCache = NULL;
pgSize = tdbEnvGetPageSize(pEnv);
cacheSize = tdbEnvGetCacheSize(pEnv);
npage = cacheSize / pgSize;
nbucket = npage;
msize = sizeof(*pPgCache) + sizeof(SPage *) * npage + sizeof(SPgList) * nbucket;
// Allocate the handle
pPgCache = (SPgCache *)calloc(1, sizeof(*pPgCache));
pPgCache = (SPgCache *)calloc(1, msize);
if (pPgCache == NULL) {
return -1;
}
// Init the handle
pPgCache->pEnv = pEnv;
pPgCache->pgsize = pgSize;
pPgCache->npage = npage;
for (int32_t i = 0; i < npage; i++) {
/* code */
}
#if 0
pPgCache->pages = (SPage *)calloc(npage, sizeof(SPage));
if (pPgCache->pages == NULL) {
pgCacheClose(pPgCache);
return -1;
}
pPgCache->pages = (SPage **)(&pPgCache[1]);
pPgCache->pght.nbucket = nbucket;
pPgCache->pght.buckets = (SPgList *)(&(pPgCache->pages[npage]));
TD_DLIST_INIT(&(pPgCache->freeList));
for (int32_t i = 0; i < npage; i++) {
pPage = pPgCache->pages + i;
pData = malloc(pgSize + sizeof(SPage));
if (pData == NULL) {
return -1;
// TODO: handle error
}
pPage = POINTER_SHIFT(pData, pgSize);
pPage->pgid = TDB_IVLD_PGID;
pPage->frameid = i;
pPage->pData = pData;
pPage->pData = (uint8_t *)calloc(1, pgSize);
if (pPage->pData == NULL) {
pgCacheClose(pPgCache);
return -1;
}
pPgCache->pght.nbucket = npage;
pPgCache->pght.buckets = (SPgList *)calloc(pPgCache->pght.nbucket, sizeof(SPgList));
if (pPgCache->pght.buckets == NULL) {
pgCacheClose(pPgCache);
return -1;
}
// add current page to the page cache
pPgCache->pages[i] = pPage;
TD_DLIST_APPEND_WITH_FIELD(&(pPgCache->freeList), pPage, freeNode);
}
#if 0
for (int32_t i = 0; i < nbucket; i++) {
TD_DLIST_INIT(pPgCache->pght.buckets + i);
}
#endif
*ppPgCache = pPgCache;
@ -106,15 +105,11 @@ int pgCacheOpen(SPgCache **ppPgCache, TENV *pEnv) {
int pgCacheClose(SPgCache *pPgCache) {
SPage *pPage;
if (pPgCache) {
tfree(pPgCache->pght.buckets);
if (pPgCache->pages) {
for (int32_t i = 0; i < pPgCache->npage; i++) {
pPage = pPgCache->pages + i;
tfree(pPage->pData);
}
free(pPgCache->pages);
for (int32_t i = 0; i < pPgCache->npage; i++) {
pPage = pPgCache->pages[i];
tfree(pPage->pData);
}
free(pPgCache);
}