diff options
| author | ulrich.bauer@gmail.com <ulrich.bauer@gmail.com@8e3bb3c2-eed4-f18f-5264-0b6c94e6926d> | 2013-02-28 19:31:04 +0000 |
|---|---|---|
| committer | ulrich.bauer@gmail.com <ulrich.bauer@gmail.com@8e3bb3c2-eed4-f18f-5264-0b6c94e6926d> | 2013-02-28 19:31:04 +0000 |
| commit | c817c81d9d79fe77b0729216b7db5a7eab56a23c (patch) | |
| tree | 44fb7b6b7e41bdf3f555e843338797de86cc3589 /include/phat/helpers/thread_local_storage.h | |
| parent | f32c606eee06544900ebe684daca14b8ac26231e (diff) | |
initial checkin
git-svn-id: https://phat.googlecode.com/svn/trunk@2 8e3bb3c2-eed4-f18f-5264-0b6c94e6926d
Diffstat (limited to 'include/phat/helpers/thread_local_storage.h')
| -rw-r--r-- | include/phat/helpers/thread_local_storage.h | 52 |
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 index 0000000..ce3c1ed --- /dev/null +++ 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;
+};
|