From 08119c361d1181b3e8f1abb429236e488a664753 Mon Sep 17 00:00:00 2001
From: Hans-Christoph Steiner <hans@eds.org>
Date: Tue, 13 Aug 2013 15:42:54 -0400
Subject: Imported Upstream version 2.2.1

---
 src/os.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'src/os.c')

diff --git a/src/os.c b/src/os.c
index b5e918a..be2ea4c 100644
--- a/src/os.c
+++ b/src/os.c
@@ -141,6 +141,26 @@ int sqlite3OsShmMap(
   return id->pMethods->xShmMap(id, iPage, pgsz, bExtend, pp);
 }
 
+#if SQLITE_MAX_MMAP_SIZE>0
+/* The real implementation of xFetch and xUnfetch */
+int sqlite3OsFetch(sqlite3_file *id, i64 iOff, int iAmt, void **pp){
+  DO_OS_MALLOC_TEST(id);
+  return id->pMethods->xFetch(id, iOff, iAmt, pp);
+}
+int sqlite3OsUnfetch(sqlite3_file *id, i64 iOff, void *p){
+  return id->pMethods->xUnfetch(id, iOff, p);
+}
+#else
+/* No-op stubs to use when memory-mapped I/O is disabled */
+int sqlite3OsFetch(sqlite3_file *id, i64 iOff, int iAmt, void **pp){
+  *pp = 0;
+  return SQLITE_OK;
+}
+int sqlite3OsUnfetch(sqlite3_file *id, i64 iOff, void *p){
+  return SQLITE_OK;
+}
+#endif
+
 /*
 ** The next group of routines are convenience wrappers around the
 ** VFS methods.
-- 
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