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more TDB

This commit is contained in:
Hongze Cheng 2022-03-31 08:04:38 +00:00
parent 71c8b91059
commit 0492362f38
3 changed files with 29 additions and 19 deletions
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21
source/libs/tdb/src/db/tdbPCache.c
View File

@ -34,18 +34,6 @@ struct SPCache {
})
#define PAGE_IS_PINNED(pPage) ((pPage)->pLruNext == NULL)
// For page ref
#define TDB_INIT_PAGE_REF(pPage) ((pPage)->nRef = 0)
#if 0
#define TDB_REF_PAGE(pPage) (++(pPage)->nRef)
#define TDB_UNREF_PAGE(pPage) (--(pPage)->nRef)
#define TDB_GET_PAGE_REF(pPage) ((pPage)->nRef)
#else
#define TDB_REF_PAGE(pPage) atomic_add_fetch_32(&((pPage)->nRef), 1)
#define TDB_UNREF_PAGE(pPage) atomic_sub_fetch_32(&((pPage)->nRef), 1)
#define TDB_GET_PAGE_REF(pPage) atomic_load_32(&((pPage)->nRef))
#endif
static int tdbPCacheOpenImpl(SPCache *pCache);
static void tdbPCacheInitLock(SPCache *pCache);
static void tdbPCacheClearLock(SPCache *pCache);
@ -107,12 +95,7 @@ void tdbPCacheRelease(SPCache *pCache, SPage *pPage) {
ASSERT(nRef >= 0);
if (nRef == 0) {
if (1 /*TODO: page still clean*/) {
tdbPCacheUnpinPage(pCache, pPage);
} else {
// TODO
ASSERT(0);
}
tdbPCacheUnpinPage(pCache, pPage);
}
}
@ -192,6 +175,8 @@ static void tdbPCacheUnpinPage(SPCache *pCache, SPage *pPage) {
tdbPCacheLock(pCache);
ASSERT(!pPage->isDirty);
nRef = TDB_GET_PAGE_REF(pPage);
ASSERT(nRef >= 0);
if (nRef == 0) {

15
source/libs/tdb/src/db/tdbPager.c
View File

@ -132,6 +132,9 @@ int tdbPagerWrite(SPager *pPager, SPage *pPage) {
if (pPage->isDirty) return 0;
// ref page one more time so the page will not be release
TDB_REF_PAGE(pPage);
// Set page as dirty
pPage->isDirty = 1;
@ -187,6 +190,7 @@ int tdbPagerCommit(SPager *pPager) {
// loop to write the dirty pages to file
for (pPage = pPager->pDirty; pPage; pPage = pPage->pDirtyNext) {
// TODO: update the page footer
ret = tdbPagerWritePageToDB(pPager, pPage);
if (ret < 0) {
ASSERT(0);
@ -194,7 +198,15 @@ int tdbPagerCommit(SPager *pPager) {
}
}
// TODO: loop to release the dirty pages
// release the page
for (pPage = pPager->pDirty; pPage; pPage = pPage->pDirtyNext) {
pPager->pDirty = pPage->pDirtyNext;
pPage->pDirtyNext = NULL;
pPage->isDirty = 0;
tdbPCacheRelease(pPager->pCache, pPage);
}
// sync the db file
tdbOsFSync(pPager->fd);
@ -202,6 +214,7 @@ int tdbPagerCommit(SPager *pPager) {
// remote the journal file
tdbOsClose(pPager->jfd);
tdbOsRemove(pPager->jFileName);
pPager->dbOrigSize = pPager->dbFileSize;
return 0;
}

12
source/libs/tdb/src/inc/tdbPCache.h
View File

@ -33,6 +33,18 @@ extern "C" {
SPager *pPager; \
SPgid pgid;
// For page ref
#define TDB_INIT_PAGE_REF(pPage) ((pPage)->nRef = 0)
#if 0
#define TDB_REF_PAGE(pPage) (++(pPage)->nRef)
#define TDB_UNREF_PAGE(pPage) (--(pPage)->nRef)
#define TDB_GET_PAGE_REF(pPage) ((pPage)->nRef)
#else
#define TDB_REF_PAGE(pPage) atomic_add_fetch_32(&((pPage)->nRef), 1)
#define TDB_UNREF_PAGE(pPage) atomic_sub_fetch_32(&((pPage)->nRef), 1)
#define TDB_GET_PAGE_REF(pPage) atomic_load_32(&((pPage)->nRef))
#endif
int tdbPCacheOpen(int pageSize, int cacheSize, SPCache **ppCache);
int tdbPCacheClose(SPCache *pCache);
SPage *tdbPCacheFetch(SPCache *pCache, const SPgid *pPgid, bool alcNewPage);