1 files changed, 52 insertions, 0 deletions
diff --git a/include/phat/helpers/thread_local_storage.h b/include/phat/helpers/thread_local_storage.h
new file mode 100644
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+++ b/include/phat/helpers/thread_local_storage.h
@@ -0,0 +1,52 @@
+/*  Copyright 2013 IST Austria
+    Contributed by: Ulrich Bauer, Michael Kerber, Jan Reininghaus
+
+    This file is part of PHAT.
+
+    PHAT is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PHAT 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 Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with PHAT.  If not, see <http://www.gnu.org/licenses/>. */
+
+#pragma once
+
+#include <phat/helpers/misc.h>
+
+// should ideally be equal to the cache line size of the CPU
+#define PHAT_TLS_SPACING_FACTOR 64
+
+// ThreadLocalStorage with some spacing to avoid "false sharing" (see wikipedia)
+template< typename T > 
+class thread_local_storage
+{
+public:
+
+    thread_local_storage() : per_thread_storage( omp_get_max_threads() * PHAT_TLS_SPACING_FACTOR ) {};
+
+	T& operator()() {
+		return per_thread_storage[ omp_get_thread_num() * PHAT_TLS_SPACING_FACTOR ];
+	}
+
+    const T& operator()() const {
+		return per_thread_storage[ omp_get_thread_num() * PHAT_TLS_SPACING_FACTOR ];
+	}
+
+	T& operator[]( int tid ) {
+		return per_thread_storage[ tid * PHAT_TLS_SPACING_FACTOR ];
+	}
+
+    const T& operator[]( int tid ) const {
+		return per_thread_storage[ tid * PHAT_TLS_SPACING_FACTOR ];
+	}
+
+protected:
+    std::vector< T > per_thread_storage; 
+};