From 73309f19e582a712e78f54988fc51dbc5ab60bf4 Mon Sep 17 00:00:00 2001
From: Andreas Schneider <asn@cryptomilk.org>
Date: Sun, 14 Jul 2013 12:34:30 +0200
Subject: cmake: Check if we have Thread Local Storage support.

---
 ConfigureChecks.cmake | 14 ++++++++++++++
 config.h.cmake        |  3 +++
 include/libssh/priv.h |  8 ++++++++
 3 files changed, 25 insertions(+)

diff --git a/ConfigureChecks.cmake b/ConfigureChecks.cmake
index b0485d98..f73fc567 100644
--- a/ConfigureChecks.cmake
+++ b/ConfigureChecks.cmake
@@ -165,6 +165,20 @@ if (CMAKE_HAVE_THREADS_LIBRARY)
 endif (CMAKE_HAVE_THREADS_LIBRARY)
 
 # OPTIONS
+check_c_source_compiles("
+__thread int tls;
+
+int main(void) {
+    return 0;
+}" HAVE_GCC_THREAD_LOCAL_STORAGE)
+
+check_c_source_compiles("
+__declspec(thread) int tls;
+
+int main(void) {
+    return 0;
+}" HAVE_MSC_THREAD_LOCAL_STORAGE)
+
 if (WITH_DEBUG_CRYPTO)
   set(DEBUG_CRYPTO 1)
 endif (WITH_DEBUG_CRYPTO)
diff --git a/config.h.cmake b/config.h.cmake
index cea26f01..0c7c0acf 100644
--- a/config.h.cmake
+++ b/config.h.cmake
@@ -120,6 +120,9 @@
 
 /**************************** OPTIONS ****************************/
 
+#cmakedefine HAVE_GCC_THREAD_LOCAL_STORAGE 1
+#cmakedefine HAVE_MSC_THREAD_LOCAL_STORAGE 1
+
 /* Define to 1 if you want to enable GSSAPI */
 #cmakedefine WITH_GSSAPI 1
 
diff --git a/include/libssh/priv.h b/include/libssh/priv.h
index 7168cf55..d7974026 100644
--- a/include/libssh/priv.h
+++ b/include/libssh/priv.h
@@ -130,6 +130,14 @@ int gettimeofday(struct timeval *__p, void *__t);
 #endif
 #endif
 
+#if defined(HAVE_GCC_THREAD_LOCAL_STORAGE)
+# define LIBSSH_THREAD __thread
+#elif defined(HAVE_MSC_THREAD_LOCAL_STORAGE)
+# define LIBSSH_THREAD __declspec(thread)
+#else
+# define LIBSSH_THREAD
+#endif
+
 #define enter_function() (void)session
 #define leave_function() (void)session
 
-- 
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