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enh: change tdb lock to rwlock

This commit is contained in:
dapan1121 2023-04-20 17:51:41 +08:00
parent ed34b401ee
commit 36f3e44096
1 changed files with 15 additions and 10 deletions
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25
source/libs/tdb/src/db/tdbPCache.c
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@ -21,7 +21,7 @@ struct SPCache {
int szPage;
int nPages;
SPage **aPage;
tdb_mutex_t mutex;
TdThreadRwlock rwLock;
int nFree;
SPage *pFree;
int nPage;
@ -44,10 +44,11 @@ static void tdbPCacheAddPageToHash(SPCache *pCache, SPage *pPage);
static void tdbPCacheUnpinPage(SPCache *pCache, SPage *pPage);
static int tdbPCacheCloseImpl(SPCache *pCache);
static void tdbPCacheInitLock(SPCache *pCache) { tdbMutexInit(&(pCache->mutex), NULL); }
static void tdbPCacheDestroyLock(SPCache *pCache) { tdbMutexDestroy(&(pCache->mutex)); }
static void tdbPCacheLock(SPCache *pCache) { tdbMutexLock(&(pCache->mutex)); }
static void tdbPCacheUnlock(SPCache *pCache) { tdbMutexUnlock(&(pCache->mutex)); }
static void tdbPCacheInitLock(SPCache *pCache) { taosThreadRwlockInit(&(pCache->rwLock), NULL); }
static void tdbPCacheDestroyLock(SPCache *pCache) { taosThreadRwlockDestroy(&(pCache->rwLock)); }
static void tdbPCacheRLock(SPCache *pCache) { taosThreadRwlockRdlock(&(pCache->rwLock)); }
static void tdbPCacheWLock(SPCache *pCache) { taosThreadRwlockWrlock(&(pCache->rwLock)); }
static void tdbPCacheUnlock(SPCache *pCache) { taosThreadRwlockUnlock(&(pCache->rwLock)); }
int tdbPCacheOpen(int pageSize, int cacheSize, SPCache **ppCache) {
SPCache *pCache;
@ -158,7 +159,7 @@ static int tdbPCacheAlterImpl(SPCache *pCache, int32_t nPage) {
int tdbPCacheAlter(SPCache *pCache, int32_t nPage) {
int ret = 0;
tdbPCacheLock(pCache);
tdbPCacheWLock(pCache);
ret = tdbPCacheAlterImpl(pCache, nPage);
@ -171,8 +172,6 @@ SPage *tdbPCacheFetch(SPCache *pCache, const SPgid *pPgid, TXN *pTxn) {
SPage *pPage;
i32 nRef = 0;
tdbPCacheLock(pCache);
pPage = tdbPCacheFetchImpl(pCache, pPgid, pTxn);
if (pPage) {
nRef = tdbRefPage(pPage);
@ -193,7 +192,7 @@ SPage *tdbPCacheFetch(SPCache *pCache, const SPgid *pPgid, TXN *pTxn) {
}
void tdbPCacheMarkFree(SPCache *pCache, SPage *pPage) {
tdbPCacheLock(pCache);
tdbPCacheWLock(pCache);
tdbPCacheRemovePageFromHash(pCache, pPage);
pPage->isFree = 1;
tdbPCacheUnlock(pCache);
@ -241,7 +240,7 @@ void tdbPCacheRelease(SPCache *pCache, SPage *pPage, TXN *pTxn) {
return;
}
tdbPCacheLock(pCache);
tdbPCacheWLock(pCache);
nRef = tdbUnrefPage(pPage);
tdbTrace("pcache/release page %p/%d/%d/%d", pPage, TDB_PAGE_PGNO(pPage), pPage->id, nRef);
if (nRef == 0) {
@ -275,6 +274,8 @@ static SPage *tdbPCacheFetchImpl(SPCache *pCache, const SPgid *pPgid, TXN *pTxn)
SPage *pPage = NULL;
SPage *pPageH = NULL;
tdbPCacheRLock(pCache);
if (!pTxn) {
tdbError("tdb/pcache: null ptr pTxn, fetch impl failed.");
return NULL;
@ -294,6 +295,10 @@ static SPage *tdbPCacheFetchImpl(SPCache *pCache, const SPgid *pPgid, TXN *pTxn)
}
}
tdbPCacheUnlock(pCache);
tdbPCacheWLock(pCache);
// 1. pPage == NULL
// 2. pPage && pPage->isLocal == 0 && !TDB_TXN_IS_WRITE(pTxn)
pPageH = pPage;