From 22e6d2e327e8a4750f7f496ab4dc259e6ad87d15 Mon Sep 17 00:00:00 2001
From: Heinrich Schuchardt <address@hidden>
Date: Mon, 9 Jan 2017 21:23:23 +0100
Subject: [PATCH] Check Windows version when using TLS

Signed-off-by: Heinrich Schuchardt <address@hidden>
---
 src/env/dll.c               | 70 +++++++++++++++++++++++++++++++++++++++++++++
 w32/Makefile_VC_DLL         |  1 +
 w32/Makefile_VC_stdcall_DLL |  1 +
 w32/config_VC               |  2 ++
 w64/config_VC               |  2 ++
 w64/makefile_VC_DLL         |  1 +
 6 files changed, 77 insertions(+)
 create mode 100644 src/env/dll.c

diff --git a/src/env/dll.c b/src/env/dll.c
new file mode 100644
index 0000000..e84096a
--- /dev/null
+++ b/src/env/dll.c
@@ -0,0 +1,70 @@
+/* dll.c (dll entry point) */
+
+/***********************************************************************
+*  This code is part of GLPK (GNU Linear Programming Kit).
+*
+*  Author Heinrich Schuchardt <address@hidden>
+*
+*  Copyright (C) 2017 Andrew Makhorin, Department for Applied
+*  Informatics, Moscow Aviation Institute, Moscow, Russia. All rights
+*  reserved. E-mail: <address@hidden>.
+*
+*  GLPK is free software: you can redistribute it and/or modify it
+*  under the terms of the GNU General Public License as published by
+*  the Free Software Foundation, either version 3 of the License, or
+*  (at your option) any later version.
+*
+*  GLPK is distributed in the hope that it will be useful, but WITHOUT
+*  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+*  or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+*  License for more details.
+*
+*  You should have received a copy of the GNU General Public License
+*  along with GLPK. If not, see <http://www.gnu.org/licenses/>.
+***********************************************************************/
+
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifdef __WOE__
+
+#pragma comment(lib, "user32.lib")
+#include <windows.h>
+
+#define VISTA 0x06
+
+/*
+ * This is the main entry point of the DLL.
+ */
+BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
+{  DWORD version;
+   DWORD major_version;
+
+#ifdef TLS
+   switch (fdwReason) {
+      case DLL_PROCESS_ATTACH:
+         /*
+          * @TODO:
+          * GetVersion is deprecated but the version help functions are not
+          * available in Visual Studio 2010. So lets use it until we remove
+          * the outdated Build files.
+          */
+         version = GetVersion();
+         major_version = version & 0xff;
+
+         if (major_version < VISTA) {
+            MessageBoxA(NULL, "This GLPK library uses thread local storage.\n"
+               "You need at least Windows Vista to utilize it.\n",
+               "GLPK", MB_OK | MB_ICONERROR);
+            return FALSE;
+         }
+         break;
+   }
+#endif /* TLS */
+
+   return TRUE;  
+}
+
+#endif /* WOE */
\ No newline at end of file
diff --git a/w32/Makefile_VC_DLL b/w32/Makefile_VC_DLL
index 1b5f025..cb90c8d 100644
--- a/w32/Makefile_VC_DLL
+++ b/w32/Makefile_VC_DLL
@@ -142,6 +142,7 @@ OBJSET = \
 ..\src\cglib\mirgen.obj \
 ..\src\colamd\colamd.obj \
 ..\src\env\alloc.obj \
+..\src\env\dll.obj \
 ..\src\env\dlsup.obj \
 ..\src\env\env.obj \
 ..\src\env\error.obj \
diff --git a/w32/Makefile_VC_stdcall_DLL b/w32/Makefile_VC_stdcall_DLL
index 741dc8d..eb60f06 100644
--- a/w32/Makefile_VC_stdcall_DLL
+++ b/w32/Makefile_VC_stdcall_DLL
@@ -144,6 +144,7 @@ OBJSET = \
 ..\src\colamd\colamd.obj \
 ..\src\env\alloc.obj \
 ..\src\env\dlsup.obj \
+..\src\env\dll.obj \
 ..\src\env\env.obj \
 ..\src\env\error.obj \
 ..\src\env\stdout.obj \
diff --git a/w32/config_VC b/w32/config_VC
index e831600..0e18c65 100644
--- a/w32/config_VC
+++ b/w32/config_VC
@@ -2,6 +2,8 @@
 
 #define __WOE__ 1
 
+#define TLS __declspec( thread )
+
 #define ODBC_DLNAME "odbc32.dll"
 /* ODBC shared library name if this feature is enabled */
 
diff --git a/w64/config_VC b/w64/config_VC
index e831600..0e18c65 100644
--- a/w64/config_VC
+++ b/w64/config_VC
@@ -2,6 +2,8 @@
 
 #define __WOE__ 1
 
+#define TLS __declspec( thread )
+
 #define ODBC_DLNAME "odbc32.dll"
 /* ODBC shared library name if this feature is enabled */
 
diff --git a/w64/makefile_VC_DLL b/w64/makefile_VC_DLL
index 1b5f025..cb90c8d 100644
--- a/w64/makefile_VC_DLL
+++ b/w64/makefile_VC_DLL
@@ -142,6 +142,7 @@ OBJSET = \
 ..\src\cglib\mirgen.obj \
 ..\src\colamd\colamd.obj \
 ..\src\env\alloc.obj \
+..\src\env\dll.obj \
 ..\src\env\dlsup.obj \
 ..\src\env\env.obj \
 ..\src\env\error.obj \
-- 
2.11.0