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More btree.c bug fixes. (CVS 1327)

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FossilOrigin-Name: e9f84ff3fe45a014ab60fabbfd91d19e6d353477
This commit is contained in:
drh
2004-05-08 20:07:40 +00:00
parent ab9f7f12d5
commit c8629a13e1
7 changed files with 173 additions and 74 deletions
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26
src/pager.c
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@@ -18,7 +18,7 @@
** file simultaneously, or one process from reading the database while
** another is writing.
**
** @(#) $Id: pager.c,v 1.104 2004/05/08 08:23:28 danielk1977 Exp $
** @(#) $Id: pager.c,v 1.105 2004/05/08 20:07:40 drh Exp $
*/
#include "os.h" /* Must be first to enable large file support */
#include "sqliteInt.h"
@@ -1115,11 +1115,14 @@ Pgno sqlite3pager_pagenumber(void *pData){
}
/*
** Increment the reference count for a page. If the page is
** currently on the freelist (the reference count is zero) then
** The page_ref() function increments the reference count for a page.
** If the page is currently on the freelist (the reference count is zero) then
** remove it from the freelist.
**
** For non-test systems, page_ref() is a macro that calls _page_ref()
** online of the reference count is zero. For test systems, page_ref()
** is a real function so that we can set breakpoints and trace it.
*/
#define page_ref(P) ((P)->nRef==0?_page_ref(P):(void)(P)->nRef++)
static void _page_ref(PgHdr *pPg){
if( pPg->nRef==0 ){
/* The page is currently on the freelist. Remove it. */
@@ -1143,6 +1146,18 @@ static void _page_ref(PgHdr *pPg){
pPg->nRef++;
REFINFO(pPg);
}
#ifdef SQLITE_TEST
static void page_ref(PgHdr *pPg){
if( pPg->nRef==0 ){
_page_ref(pPg);
}else{
pPg->nRef++;
REFINFO(pPg);
}
}
#else
# define page_ref(P) ((P)->nRef==0?_page_ref(P):(void)(P)->nRef++)
#endif
/*
** Increment the reference count for a page. The input pointer is
@@ -2220,6 +2235,3 @@ void sqlite3pager_refdump(Pager *pPager){
}
}
#endif