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/*
* Copyright 2008-2021 NVIDIA Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <thrust/detail/config.h>
#include <thrust/random/discard_block_engine.h>
THRUST_NAMESPACE_BEGIN
namespace random
{
template<typename Engine, size_t p, size_t r>
__host__ __device__
discard_block_engine<Engine,p,r>
::discard_block_engine()
: m_e(), m_n(0)
{}
template<typename Engine, size_t p, size_t r>
__host__ __device__
discard_block_engine<Engine,p,r>
::discard_block_engine(result_type s)
: m_e(s), m_n(0)
{}
template<typename Engine, size_t p, size_t r>
__host__ __device__
discard_block_engine<Engine,p,r>
::discard_block_engine(const base_type &urng)
: m_e(urng), m_n(0)
{}
template<typename Engine, size_t p, size_t r>
__host__ __device__
void discard_block_engine<Engine,p,r>
::seed(void)
{
m_e.seed();
m_n = 0;
}
template<typename Engine, size_t p, size_t r>
__host__ __device__
void discard_block_engine<Engine,p,r>
::seed(result_type s)
{
m_e.seed(s);
m_n = 0;
}
template<typename Engine, size_t p, size_t r>
__host__ __device__
typename discard_block_engine<Engine,p,r>::result_type
discard_block_engine<Engine,p,r>
::operator()(void)
{
if(m_n >= used_block)
{
m_e.discard(block_size - m_n);
// for(; m_n < block_size; ++m_n)
// m_e();
m_n = 0;
}
++m_n;
return m_e();
}
template<typename Engine, size_t p, size_t r>
__host__ __device__
void discard_block_engine<Engine,p,r>
::discard(unsigned long long z)
{
// XXX this should be accelerated
for(; z > 0; --z)
{
this->operator()();
} // end for
}
template<typename Engine, size_t p, size_t r>
__host__ __device__
const typename discard_block_engine<Engine,p,r>::base_type &
discard_block_engine<Engine,p,r>
::base(void) const
{
return m_e;
}
template<typename Engine, size_t p, size_t r>
template<typename CharT, typename Traits>
std::basic_ostream<CharT,Traits>& discard_block_engine<Engine,p,r>
::stream_out(std::basic_ostream<CharT,Traits> &os) const
{
typedef std::basic_ostream<CharT,Traits> ostream_type;
typedef typename ostream_type::ios_base ios_base;
// save old flags & fill character
const typename ios_base::fmtflags flags = os.flags();
const CharT fill = os.fill();
const CharT space = os.widen(' ');
os.flags(ios_base::dec | ios_base::fixed | ios_base::left);
os.fill(space);
// output the base engine followed by n
os << m_e << space << m_n;
// restore flags & fill character
os.flags(flags);
os.fill(fill);
return os;
}
template<typename Engine, size_t p, size_t r>
template<typename CharT, typename Traits>
std::basic_istream<CharT,Traits>& discard_block_engine<Engine,p,r>
::stream_in(std::basic_istream<CharT,Traits> &is)
{
typedef std::basic_istream<CharT,Traits> istream_type;
typedef typename istream_type::ios_base ios_base;
// save old flags
const typename ios_base::fmtflags flags = is.flags();
is.flags(ios_base::skipws);
// input the base engine and then n
is >> m_e >> m_n;
// restore old flags
is.flags(flags);
return is;
}
template<typename Engine, size_t p, size_t r>
__host__ __device__
bool discard_block_engine<Engine,p,r>
::equal(const discard_block_engine<Engine,p,r> &rhs) const
{
return (m_e == rhs.m_e) && (m_n == rhs.m_n);
}
template<typename Engine, size_t p, size_t r,
typename CharT, typename Traits>
std::basic_ostream<CharT,Traits>&
operator<<(std::basic_ostream<CharT,Traits> &os,
const discard_block_engine<Engine,p,r> &e)
{
return thrust::random::detail::random_core_access::stream_out(os,e);
}
template<typename Engine, size_t p, size_t r,
typename CharT, typename Traits>
std::basic_istream<CharT,Traits>&
operator>>(std::basic_istream<CharT,Traits> &is,
discard_block_engine<Engine,p,r> &e)
{
return thrust::random::detail::random_core_access::stream_in(is,e);
}
template<typename Engine, size_t p, size_t r>
__host__ __device__
bool operator==(const discard_block_engine<Engine,p,r> &lhs,
const discard_block_engine<Engine,p,r> &rhs)
{
return thrust::random::detail::random_core_access::equal(lhs,rhs);
}
template<typename Engine, size_t p, size_t r>
__host__ __device__
bool operator!=(const discard_block_engine<Engine,p,r> &lhs,
const discard_block_engine<Engine,p,r> &rhs)
{
return !(lhs == rhs);
}
} // end random
THRUST_NAMESPACE_END
|
