blob: ee90db22dc3215d335431c9973d9756bedbbf33b [file] [log] [blame]
/**
* Copyright 2016 Pivotal Software, Inc.
*
* 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.
**/
#include "utility/CalculateInstalledMemory.hpp"
#include "utility/UtilityConfig.h"
#if defined(QUICKSTEP_HAVE_SYSCONF)
#include <unistd.h>
#elif defined(QUICKSTEP_HAVE_WINDOWS)
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#endif
#include "glog/logging.h"
namespace quickstep {
namespace utility {
namespace system {
bool calculateTotalMemoryInBytes(std::uint64_t *total_memory) {
#if defined(QUICKSTEP_HAVE_SYSCONF)
const std::uint64_t num_pages = static_cast<std::uint64_t>(sysconf(_SC_PHYS_PAGES));
const std::uint64_t page_size = static_cast<std::uint64_t>(sysconf(_SC_PAGE_SIZE));
if (num_pages > 0 && page_size > 0) {
*total_memory = num_pages * page_size;
LOG(INFO) << "Total installed memory is " << *total_memory << " bytes\n";
return true;
}
LOG(INFO) << "Could not compute the total available memory using sysconf\n";
return false;
#elif defined(QUICKSTEP_HAVE_WINDOWS)
MEMORYSTATUSEX mem_status;
mem_status.dwLength = sizeof(mem_status);
GlobalMemoryStatusEx(&mem_status);
if (mem_status.ullTotalPhys > 0) {
*total_memory = static_cast<std::uint64_t>(mem_status.ullTotalPhys);
LOG(INFO) << "Total installed memory is " << *total_memory << " bytes\n";
return true;
}
LOG(INFO) << "Could not compute the total installed memory using GlobalMemoryStatusEx\n";
return false;
#else
// TODO(jmp): Expand to find other ways to calculate the installed memory.
#error "No implementation available to calculate the total installed memory."
#endif
}
} // namespace system
} // namespace utility
} // namespace quickstep