| /* |
| Copyright 2005-2010 Intel Corporation. All Rights Reserved. |
| |
| This file is part of Threading Building Blocks. |
| |
| Threading Building Blocks is free software; you can redistribute it |
| and/or modify it under the terms of the GNU General Public License |
| version 2 as published by the Free Software Foundation. |
| |
| Threading Building Blocks 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 Threading Building Blocks; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| |
| As a special exception, you may use this file as part of a free software |
| library without restriction. Specifically, if other files instantiate |
| templates or use macros or inline functions from this file, or you compile |
| this file and link it with other files to produce an executable, this |
| file does not by itself cause the resulting executable to be covered by |
| the GNU General Public License. This exception does not however |
| invalidate any other reasons why the executable file might be covered by |
| the GNU General Public License. |
| */ |
| |
| #ifndef tbb_tests_harness_concurrency_tracker_H |
| #define tbb_tests_harness_concurrency_tracker_H |
| |
| #include "harness.h" |
| #include "tbb/atomic.h" |
| #include "../tbb/tls.h" |
| |
| namespace Harness { |
| |
| static tbb::atomic<unsigned> ctInstantParallelism; |
| static tbb::atomic<unsigned> ctPeakParallelism; |
| static tbb::internal::tls<uintptr_t> ctNested; |
| |
| class ConcurrencyTracker { |
| bool m_Outer; |
| |
| static void Started () { |
| unsigned p = ++ctInstantParallelism; |
| unsigned q = ctPeakParallelism; |
| while( q<p ) { |
| q = ctPeakParallelism.compare_and_swap(p,q); |
| } |
| } |
| |
| static void Stopped () { |
| ASSERT ( ctInstantParallelism > 0, "Mismatched call to ConcurrencyTracker::Stopped()" ); |
| --ctInstantParallelism; |
| } |
| public: |
| ConcurrencyTracker() : m_Outer(false) { |
| uintptr_t nested = ctNested; |
| ASSERT (nested == 0 || nested == 1, NULL); |
| if ( !ctNested ) { |
| Started(); |
| m_Outer = true; |
| ctNested = 1; |
| } |
| } |
| ~ConcurrencyTracker() { |
| if ( m_Outer ) { |
| Stopped(); |
| ctNested = 0; |
| } |
| } |
| |
| static unsigned PeakParallelism() { return ctPeakParallelism; } |
| static unsigned InstantParallelism() { return ctInstantParallelism; } |
| |
| static void Reset() { |
| ASSERT (ctInstantParallelism == 0, "Reset cannot be called when concurrency tracking is underway"); |
| ctInstantParallelism = ctPeakParallelism = 0; |
| } |
| }; // ConcurrencyTracker |
| |
| } // namespace Harness |
| |
| #endif /* tbb_tests_harness_concurrency_tracker_H */ |