54 lines
2.3 KiB
C
54 lines
2.3 KiB
C
/*
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Bullet Continuous Collision Detection and Physics Library, http://bulletphysics.org
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Copyright (C) 2006, 2009 Sony Computer Entertainment Inc.
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This software is provided 'as-is', without any express or implied warranty.
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In no event will the authors be held liable for any damages arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it freely,
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subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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//----------------------------------------------------------------------------------------
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// Shared code for GPU-based utilities
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//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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// Keep this file free from Bullet headers
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// will be compiled by both CPU and CUDA compilers
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// file with definitions of BT_GPU_xxx should be included first
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//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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//----------------------------------------------------------------------------------------
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#include "btGpuUtilsSharedDefs.h"
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//----------------------------------------------------------------------------------------
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extern "C"
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{
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//----------------------------------------------------------------------------------------
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//Round a / b to nearest higher integer value
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int BT_GPU_PREF(iDivUp)(int a, int b)
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{
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return (a % b != 0) ? (a / b + 1) : (a / b);
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} // iDivUp()
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//----------------------------------------------------------------------------------------
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// compute grid and thread block size for a given number of elements
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void BT_GPU_PREF(computeGridSize)(int n, int blockSize, int &numBlocks, int &numThreads)
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{
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numThreads = BT_GPU_min(blockSize, n);
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numBlocks = BT_GPU_PREF(iDivUp)(n, numThreads);
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} // computeGridSize()
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//----------------------------------------------------------------------------------------
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} // extern "C"
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