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thread_operators.cuh
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/******************************************************************************
* Copyright (c) 2011, Duane Merrill. All rights reserved.
* Copyright (c) 2011-2013, NVIDIA CORPORATION. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the NVIDIA CORPORATION nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL NVIDIA CORPORATION BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************/
/**
* \file
* Simple binary operator functor types
*/
/******************************************************************************
* Simple functor operators
******************************************************************************/
#pragma once
#include "../util_macro.cuh"
#include "../util_namespace.cuh"
/// Optional outer namespace(s)
CUB_NS_PREFIX
/// CUB namespace
namespace cub {
/**
* \addtogroup ThreadModule
* @{
*/
/**
* \brief Default equality functor
*/
struct Equality
{
/// Boolean equality operator, returns <tt>(a == b)</tt>
template <typename T>
__host__ __device__ __forceinline__ bool operator()(const T &a, const T &b)
{
return a == b;
}
};
/**
* \brief Default inequality functor
*/
struct Inequality
{
/// Boolean inequality operator, returns <tt>(a != b)</tt>
template <typename T>
__host__ __device__ __forceinline__ bool operator()(const T &a, const T &b)
{
return a != b;
}
};
/**
* \brief Default sum functor
*/
struct Sum
{
/// Boolean sum operator, returns <tt>a + b</tt>
template <typename T>
__host__ __device__ __forceinline__ T operator()(const T &a, const T &b)
{
return a + b;
}
};
/**
* \brief Default max functor
*/
struct Max
{
/// Boolean max operator, returns <tt>(a > b) ? a : b</tt>
template <typename T>
__host__ __device__ __forceinline__ T operator()(const T &a, const T &b)
{
return CUB_MAX(a, b);
}
};
/**
* \brief Default min functor
*/
struct Min
{
/// Boolean min operator, returns <tt>(a < b) ? a : b</tt>
template <typename T>
__host__ __device__ __forceinline__ T operator()(const T &a, const T &b)
{
return CUB_MIN(a, b);
}
};
/**
* \brief Default cast functor
*/
template <typename B>
struct Cast
{
/// Boolean max operator, returns <tt>(a > b) ? a : b</tt>
template <typename A>
__host__ __device__ __forceinline__ B operator()(const A &a)
{
return (B) a;
}
};
/** @} */ // end group ThreadModule
} // CUB namespace
CUB_NS_POSTFIX // Optional outer namespace(s)

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