Import SQLite 3.10.2.

third_party/sqlite/src/src/mem3.c

 /*
 ** 2007 October 14
 **
 ** The author disclaims copyright to this source code.  In place of
 ** a legal notice, here is a blessing:
 **
 **    May you do good and not evil.
 **    May you find forgiveness for yourself and forgive others.
 **    May you share freely, never taking more than you give.
 **
@@ skipping 458 matching lines @@
   }
 }
 
 /*
 ** Return the size of an outstanding allocation, in bytes.  The
 ** size returned omits the 8-byte header overhead.  This only
 ** works for chunks that are currently checked out.
 */
 static int memsys3Size(void *p){
   Mem3Block *pBlock;
-  if( p==0 ) return 0;
+  assert( p!=0 );
   pBlock = (Mem3Block*)p;
   assert( (pBlock[-1].u.hdr.size4x&1)!=0 );
   return (pBlock[-1].u.hdr.size4x&~3)*2 - 4;
 }
 
 /*
 ** Round up a request size to the next valid allocation size.
 */
 static int memsys3Roundup(int n){
   if( n<=12 ){
@@ skipping 188 matching lines @@
      memsys3Size,
      memsys3Roundup,
      memsys3Init,
      memsys3Shutdown,
      0
   };
   return &mempoolMethods;
 }
 
 #endif /* SQLITE_ENABLE_MEMSYS3 */