Questionable changes to support interruptible checkpoint in ZipVFS.

FossilOrigin-Name: c7a9f26d118c7a453d45fa73efa4d1ab79301659

1 files changed, 7 insertions, 0 deletions

diff --git a/src/btree.c b/src/btree.c
index c25c59404..a32745834 100644
--- a/src/btree.c
+++ b/src/btree.c
@@ -2398,6 +2398,8 @@ btree_open_out:
     sqlite3_free(p);
     *ppBtree = 0;
   }else{
+    sqlite3_file *pFile;
+
     /* If the B-Tree was successfully opened, set the pager-cache size to the
     ** default value. Except, when opening on an existing shared pager-cache,
     ** do not change the pager-cache size.
@@ -2405,6 +2407,11 @@ btree_open_out:
     if( sqlite3BtreeSchema(p, 0, 0)==0 ){
       sqlite3PagerSetCachesize(p->pBt->pPager, SQLITE_DEFAULT_CACHE_SIZE);
     }
+
+    pFile = sqlite3PagerFile(pBt->pPager);
+    if( pFile->pMethods ){
+      sqlite3OsFileControlHint(pFile, SQLITE_FCNTL_PDB, (void*)&pBt->db);
+    }
   }
   if( mutexOpen ){
     assert( sqlite3_mutex_held(mutexOpen) );