memory: add pagesize query
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@ -160,6 +160,8 @@ UTIL_FILES = \
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matrix.ipp \
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matrix.ipp \
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memory.cpp \
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memory.cpp \
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memory.hpp \
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memory.hpp \
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memory/system.cpp \
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memory/system.hpp \
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net/address.cpp \
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net/address.cpp \
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net/address.hpp \
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net/address.hpp \
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net/except.cpp \
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net/except.cpp \
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39
memory/system.cpp
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39
memory/system.cpp
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/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2015 Danny Robson <danny@nerdcruft.net>
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*/
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#include "./system.hpp"
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#include "../except.hpp"
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#include "../types/casts.hpp"
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#include <unistd.h>
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///////////////////////////////////////////////////////////////////////////////
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size_t
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util::memory::pagesize (void)
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{
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static size_t val;
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if (!val) {
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auto res = sysconf (_SC_PAGE_SIZE);
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if (res == -1)
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errno_error::throw_code ();
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val = sign_cast<unsigned long> (res);
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}
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return val;
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}
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26
memory/system.hpp
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26
memory/system.hpp
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/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2015 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef __UTIL_MEMORY_SYSTEM_HPP
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#define __UTIL_MEMORY_SYSTEM_HPP
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#include <cstddef>
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namespace util { namespace memory {
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size_t pagesize (void);
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} }
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#endif
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