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framework: add Omp
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‎src.cmake‎

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@@ -188,6 +188,8 @@ set(ENGINELIST
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${ENGINE_DIR}/framework/CvarSystem.h
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${ENGINE_DIR}/framework/LogSystem.cpp
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${ENGINE_DIR}/framework/LogSystem.h
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${ENGINE_DIR}/framework/Omp.cpp
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${ENGINE_DIR}/framework/Omp.h
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${ENGINE_DIR}/framework/Resource.cpp
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${ENGINE_DIR}/framework/Resource.h
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${ENGINE_DIR}/framework/System.cpp

‎src/engine/framework/Omp.cpp‎

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/*
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===========================================================================
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Daemon BSD Source Code
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Copyright (c) 2025, Daemon Developers
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the Daemon developers nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL DAEMON DEVELOPERS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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===========================================================================
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*/
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#include <algorithm>
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#include "CvarSystem.h"
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#include "Omp.h"
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#if defined(_OPENMP)
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#include "omp.h"
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#endif
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#if defined(_OPENMP)
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static Cvar::Range<Cvar::Cvar<int>> common_ompThreads(
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"common.ompThreads", "OpenMP threads", Cvar::NONE, 0, 0, 32 );
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#endif
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namespace Omp {
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#if defined(_OPENMP)
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static int ompMaxThreads = 1;
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#endif
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static int ompThreads = 1;
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static void ReadMaxThreads()
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{
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#if defined(_OPENMP)
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ompMaxThreads = omp_get_max_threads();
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#endif
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}
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void SetupThreads()
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{
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#if defined(_OPENMP)
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ompThreads = common_ompThreads.Get()
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? common_ompThreads.Get()
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: ompMaxThreads <= 2
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? ompMaxThreads
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: std::max( 2, ompMaxThreads / 2 );
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#endif
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}
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void Init()
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{
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ReadMaxThreads();
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SetupThreads();
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}
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void ApplyThreads()
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{
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#if defined(_OPENMP)
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omp_set_num_threads( ompThreads );
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#endif
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}
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int GetThreads()
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{
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return ompThreads;
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}
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}

‎src/engine/framework/Omp.h‎

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/*
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===========================================================================
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Daemon BSD Source Code
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Copyright (c) 2025, Daemon Developers
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the Daemon developers nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL DAEMON DEVELOPERS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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===========================================================================
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*/
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#ifndef COMMON_OMP_H_
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#define COMMON_OMP_H_
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namespace Omp {
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void SetupThreads();
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void Init();
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void ApplyThreads();
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int GetThreads();
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};
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#endif // COMMON_OMP_H_

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