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Overview
| Comment: | Fix comments, including some documentation comments, in the page cache logic. No code changes. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | c80e9c1a0dc0e501b209874e147e1cb1 |
| User & Date: | drh 2011-01-14 15:17:55 |
Context
|
2011-01-14
| ||
| 16:43 | Rerun autoconf to bring the configure script up-to-date. check-in: 14217464 user: drh tags: trunk | |
| 16:12 | Provide an alternative and experimental pcache implementation that avoids the use of mutexes at the expense of using more memory. Closed-Leaf check-in: 2ea5bd12 user: drh tags: mutex-free-pcache | |
| 15:17 | Fix comments, including some documentation comments, in the page cache logic. No code changes. check-in: c80e9c1a user: drh tags: trunk | |
| 11:51 | Fix a bug in test code (test_vfs.c). check-in: 772a3845 user: dan tags: trunk | |
Changes
install-sh became executable.
Changes to src/pcache1.c.
684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 |
assert( pPage->pLruPrev==0 && pPage->pLruNext==0 );
assert( pcache1.pLruHead!=pPage && pcache1.pLruTail!=pPage );
if( reuseUnlikely || pcache1.nCurrentPage>pcache1.nMaxPage ){
pcache1RemoveFromHash(pPage);
pcache1FreePage(pPage);
}else{
/* Add the page to the global LRU list. Normally, the page is added to
** the head of the list (last page to be recycled). However, if the
** reuseUnlikely flag passed to this function is true, the page is added
** to the tail of the list (first page to be recycled).
*/
if( pcache1.pLruHead ){
pcache1.pLruHead->pLruPrev = pPage;
pPage->pLruNext = pcache1.pLruHead;
pcache1.pLruHead = pPage;
}else{
pcache1.pLruTail = pPage;
pcache1.pLruHead = pPage;
|
| < < < < |
684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 |
assert( pPage->pLruPrev==0 && pPage->pLruNext==0 );
assert( pcache1.pLruHead!=pPage && pcache1.pLruTail!=pPage );
if( reuseUnlikely || pcache1.nCurrentPage>pcache1.nMaxPage ){
pcache1RemoveFromHash(pPage);
pcache1FreePage(pPage);
}else{
/* Add the page to the global LRU list. */
if( pcache1.pLruHead ){
pcache1.pLruHead->pLruPrev = pPage;
pPage->pLruNext = pcache1.pLruHead;
pcache1.pLruHead = pPage;
}else{
pcache1.pLruTail = pPage;
pcache1.pLruHead = pPage;
|
Changes to src/sqlite.h.in.
5733 5734 5735 5736 5737 5738 5739 5740 5741 5742 5743 5744 5745 5746 5747 |
** 8-byte boundary. The page to be fetched is determined by the key. ^The
** mimimum key value is 1. After it has been retrieved using xFetch, the page
** is considered to be "pinned".
**
** If the requested page is already in the page cache, then the page cache
** implementation must return a pointer to the page buffer with its content
** intact. If the requested page is not already in the cache, then the
** behavior of the cache implementation should use the value of the createFlag
** parameter to help it determined what action to take:
**
** <table border=1 width=85% align=center>
** <tr><th> createFlag <th> Behaviour when page is not already in cache
** <tr><td> 0 <td> Do not allocate a new page. Return NULL.
** <tr><td> 1 <td> Allocate a new page if it easy and convenient to do so.
** Otherwise return NULL.
|
| |
5733 5734 5735 5736 5737 5738 5739 5740 5741 5742 5743 5744 5745 5746 5747 |
** 8-byte boundary. The page to be fetched is determined by the key. ^The ** mimimum key value is 1. After it has been retrieved using xFetch, the page ** is considered to be "pinned". ** ** If the requested page is already in the page cache, then the page cache ** implementation must return a pointer to the page buffer with its content ** intact. If the requested page is not already in the cache, then the ** cache implementation should use the value of the createFlag ** parameter to help it determined what action to take: ** ** <table border=1 width=85% align=center> ** <tr><th> createFlag <th> Behaviour when page is not already in cache ** <tr><td> 0 <td> Do not allocate a new page. Return NULL. ** <tr><td> 1 <td> Allocate a new page if it easy and convenient to do so. ** Otherwise return NULL. |
test/progress.test became a regular file.
tool/mkopts.tcl became a regular file.