pagesize.hpp

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// 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.

#ifndef __STOUT_OS_POSIX_PAGESIZE_HPP__
#define __STOUT_OS_POSIX_PAGESIZE_HPP__

#include <unistd.h>

#include <glog/logging.h>


namespace os {

// The alternative `getpagesize()` is not defined by POSIX.
inline size_t pagesize()
{
  // We assume that `sysconf` will not fail in practice.
  long result = ::sysconf(_SC_PAGESIZE);
  CHECK(result >= 0);
  return result;
}

} // namespace os {

#endif // __STOUT_OS_POSIX_PAGESIZE_HPP__