From: Mikko Rasa <tdb@tdb.fi>
Date: Wed, 27 Mar 2013 19:53:20 +0000 (+0200)
Subject: Improve file opening on Windows
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=959bb34629f786cd64f666029407e60bdd37d418;p=libs%2Fcore.git

Improve file opening on Windows

Handle M_RDWR properly
Allow multiple concurrent readers
---

diff --git a/source/io/file.cpp b/source/io/file.cpp
index d4b2da3..805a9e8 100644
--- a/source/io/file.cpp
+++ b/source/io/file.cpp
@@ -26,11 +26,13 @@ File::File(const string &fn, Mode m, CreateMode cm)
 
 #ifdef WIN32
 	int flags = 0;
+	int share_flags = 0;
 	int create_flags = OPEN_EXISTING;
 
 	if(mode&M_READ)
 		flags |= GENERIC_READ;
-	else if(mode&M_WRITE)
+
+	if(mode&M_WRITE)
 	{
 		flags |= GENERIC_WRITE;
 
@@ -43,8 +45,10 @@ File::File(const string &fn, Mode m, CreateMode cm)
 		case C_NEW:      create_flags = CREATE_NEW; break;
 		}
 	}
+	else
+		share_flags = FILE_SHARE_READ;
 
-	*handle = CreateFile(fn.c_str(), flags, 0, 0, create_flags, FILE_ATTRIBUTE_NORMAL, 0);
+	*handle = CreateFile(fn.c_str(), flags, share_flags, 0, create_flags, FILE_ATTRIBUTE_NORMAL, 0);
 	if(!handle)
 	{
 		int err = GetLastError();