From: mstembera <m_stembera@yahoo.com>
Date: Sun, 23 Dec 2018 15:09:03 +0000 (-0800)
Subject: Turn on random access for Syzygy files in Windows (#1840)
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=ae5d2c38e1b9f6a990c29d31a37d6555d197f939

Turn on random access for Syzygy files in Windows (#1840)

* This is the Windows version of
https://github.com/official-stockfish/Stockfish/pull/1829

No functional change.
---

diff --git a/src/syzygy/tbprobe.cpp b/src/syzygy/tbprobe.cpp
index 60979a56..57c7d872 100644
--- a/src/syzygy/tbprobe.cpp
+++ b/src/syzygy/tbprobe.cpp
@@ -224,8 +224,9 @@ public:
             exit(1);
         }
 #else
+        // Note FILE_FLAG_RANDOM_ACCESS is only a hint to Windows and as such may get ignored.
         HANDLE fd = CreateFile(fname.c_str(), GENERIC_READ, FILE_SHARE_READ, nullptr,
-                               OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, nullptr);
+                               OPEN_EXISTING, FILE_FLAG_RANDOM_ACCESS, nullptr);
 
         if (fd == INVALID_HANDLE_VALUE)
             return *baseAddress = nullptr, nullptr;