| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 |