From 3114ef0b0cb5d50ebed0e96d238f8ee00a8cc270 Mon Sep 17 00:00:00 2001
From: levlam <levlam@telegram.org>
Date: Tue, 15 Dec 2020 01:08:14 +0300
Subject: [PATCH] Always build SQLCipher with OMIT_MEMLOCK to significantly
 increase its performance.

---
 sqlite/CMakeLists.txt   | 2 +-
 sqlite/sqlite/sqlite3.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/sqlite/CMakeLists.txt b/sqlite/CMakeLists.txt
index b439b0cd6..319fe0d11 100644
--- a/sqlite/CMakeLists.txt
+++ b/sqlite/CMakeLists.txt
@@ -37,7 +37,7 @@ target_compile_definitions(tdsqlite PRIVATE
   #-DSQLITE_OMIT_DEPRECATED  # SQLCipher uses deprecated sqlite3_profile
   #-DSQLITE_OMIT_SHARED_CACHE
 )
-target_compile_definitions(tdsqlite PRIVATE -DSQLITE_HAS_CODEC -DSQLITE_TEMP_STORE=2 -DSQLITE_ENABLE_FTS5 -DSQLITE_DISABLE_LFS)
+target_compile_definitions(tdsqlite PRIVATE -DSQLITE_HAS_CODEC -DSQLITE_TEMP_STORE=2 -DSQLITE_ENABLE_FTS5 -DSQLITE_DISABLE_LFS -DOMIT_MEMLOCK)
 
 if (NOT WIN32)
   target_compile_definitions(tdsqlite PRIVATE -DHAVE_USLEEP -DNDEBUG=1)
diff --git a/sqlite/sqlite/sqlite3.c b/sqlite/sqlite/sqlite3.c
index 9f5890681..cb15a29a3 100644
--- a/sqlite/sqlite/sqlite3.c
+++ b/sqlite/sqlite/sqlite3.c
@@ -22555,7 +22555,7 @@ end_of_export:
 
 /* #include "sqlcipher.h" */
 /* #include "crypto.h" */
-#ifndef OMIT_MEMLOCK
+// #ifndef OMIT_MEMLOCK
 #if defined(__unix__) || defined(__APPLE__) || defined(_AIX)
 #include <errno.h>
 #include <unistd.h>
@@ -22564,7 +22564,7 @@ end_of_export:
 #elif defined(_WIN32)
 #include <windows.h>
 #endif
-#endif
+// #endif
 
 static volatile unsigned int default_flags = DEFAULT_CIPHER_FLAGS;
 static volatile unsigned char hmac_salt_mask = HMAC_SALT_MASK;