Performance improvement in sqlite3TableLock().

FossilOrigin-Name: 0d77e371c47107f67550e9bedfd26808fcfd84c7473f94b6053f75f0e3463c73

1 files changed, 12 insertions, 3 deletions

diff --git a/src/build.c b/src/build.c
index 6339a9784..25954b4d4 100644
--- a/src/build.c
+++ b/src/build.c
@@ -46,7 +46,7 @@ struct TableLock {
 ** code to make the lock occur is generated by a later call to
 ** codeTableLocks() which occurs during sqlite3FinishCoding().
 */
-void sqlite3TableLock(
+static SQLITE_NOINLINE void lockTable(
   Parse *pParse,     /* Parsing context */
   int iDb,           /* Index of the database containing the table to lock */
   Pgno iTab,         /* Root page number of the table to be locked */
@@ -59,8 +59,6 @@ void sqlite3TableLock(
   TableLock *p;
   assert( iDb>=0 );
 
-  if( iDb==1 ) return;
-  if( !sqlite3BtreeSharable(pParse->db->aDb[iDb].pBt) ) return;
   pToplevel = sqlite3ParseToplevel(pParse);
   for(i=0; i<pToplevel->nTableLock; i++){
     p = &pToplevel->aTableLock[i];
@@ -84,6 +82,17 @@ void sqlite3TableLock(
     sqlite3OomFault(pToplevel->db);
   }
 }
+void sqlite3TableLock(
+  Parse *pParse,     /* Parsing context */
+  int iDb,           /* Index of the database containing the table to lock */
+  Pgno iTab,         /* Root page number of the table to be locked */
+  u8 isWriteLock,    /* True for a write lock */
+  const char *zName  /* Name of the table to be locked */
+){
+  if( iDb==1 ) return;
+  if( !sqlite3BtreeSharable(pParse->db->aDb[iDb].pBt) ) return;
+  lockTable(pParse, iDb, iTab, isWriteLock, zName);
+}
 
 /*
 ** Code an OP_TableLock instruction for each table locked by the