From a835d1e65a3dbae4feca742db93d0b2e1a9ff29c Mon Sep 17 00:00:00 2001
From: Allen Byrne <byrn@hdfgroup.org>
Date: Mon, 11 Apr 2011 15:52:09 -0500
Subject: [svn-r20472] Add message that H5_HAVE_WIN_THREADS requires WINVER >=
 0x600 (VISTA or WIN7)

---
 CMakeLists.txt              |  3 ++-
 config/cmake/H5pubconf.h.in |  3 +++
 config/cmake/HDF5Tests.c    | 17 +++++++++++++++++
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5bfabef..d17ec97 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -608,8 +608,9 @@ IF (WIN32 AND NOT CYGWIN)
     IF (HDF5_ENABLE_PARALLEL)
       MESSAGE (FATAL " **** Parallel and Threadsafe options are mutually exclusive **** ")
     ENDIF (HDF5_ENABLE_PARALLEL)
-    SET (H5_HAVE_WIN_THREADS 1)
     SET (H5_HAVE_THREADSAFE 1)
+    SET (H5_HAVE_WIN_THREADS 1)
+    MESSAGE (STATUS " **** Windows Threads only available in WINVER>=0x600 (Vista or Windows 7)**** ")
   ENDIF (HDF5_ENABLE_THREADSAFE)
 ENDIF (WIN32 AND NOT CYGWIN)
 
diff --git a/config/cmake/H5pubconf.h.in b/config/cmake/H5pubconf.h.in
index 0dbd1ec..cd05639 100644
--- a/config/cmake/H5pubconf.h.in
+++ b/config/cmake/H5pubconf.h.in
@@ -294,6 +294,9 @@
 /* Define to 1 if you have the <pthread.h> header file. */
 #cmakedefine H5_HAVE_PTHREAD_H @H5_HAVE_PTHREAD_H@
 
+/* Define to 1 if you have the 'InitOnceExecuteOnce' function. */
+#cmakedefine H5_HAVE_WIN_THREADS @H5_HAVE_WIN_THREADS@
+
 /* Define to 1 if you have the `random' function. */
 #cmakedefine H5_HAVE_RANDOM @H5_HAVE_RANDOM@
 
diff --git a/config/cmake/HDF5Tests.c b/config/cmake/HDF5Tests.c
index ea4a648..55e91a4 100644
--- a/config/cmake/HDF5Tests.c
+++ b/config/cmake/HDF5Tests.c
@@ -384,4 +384,21 @@ int main ()
 
 #endif /* HAVE_GPFS */
 
+#ifdef HAVE_WIN_THREADS
+
+#include <windows.h>
+int main ()
+{
+    BOOL first_init_g=INIT_ONCE_STATIC_INIT;
+    BOOL CALLBACK win32_first_thread_init(PINIT_ONCE InitOnce, PVOID Parameter, PVOID *lpContext);
+    BOOL ret=FALSE;
+    
+    ret=InitOnceExecuteOnce(&first_init_g, win32_first_thread_init, NULL, NULL);
+    exit(ret ? 0 : 1);
+}
+BOOL CALLBACK 
+win32_first_thread_init(PINIT_ONCE InitOnce, PVOID Parameter, PVOID *lpContext)
+{return TRUE;}
+
+#endif /* HAVE_WIN_THREADS */
 
-- 
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