content: /*
   ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
   ~                                                                               ~
   ~ The MIT License (MIT)                                                         ~
   ~                                                                               ~
   ~ Copyright (c) 2015-2025 miaixz.org OSHI and other contributors.               ~
   ~                                                                               ~
   ~ Permission is hereby granted, free of charge, to any person obtaining a copy  ~
   ~ of this software and associated documentation files (the "Software"), to deal ~
   ~ in the Software without restriction, including without limitation the rights  ~
   ~ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell     ~
   ~ copies of the Software, and to permit persons to whom the Software is         ~
   ~ furnished to do so, subject to the following conditions:                      ~
   ~                                                                               ~
   ~ The above copyright notice and this permission notice shall be included in    ~
   ~ all copies or substantial portions of the Software.                           ~
   ~                                                                               ~
   ~ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR    ~
   ~ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,      ~
   ~ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE   ~
   ~ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER        ~
   ~ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, ~
   ~ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN     ~
   ~ THE SOFTWARE.                                                                 ~
   ~                                                                               ~
   ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
  */
  package org.miaixz.bus.health.unix.platform.freebsd.hardware;
  
  import java.util.function.Supplier;
  
  import org.miaixz.bus.core.lang.annotation.ThreadSafe;
  import org.miaixz.bus.health.Executor;
  import org.miaixz.bus.health.Memoizer;
  import org.miaixz.bus.health.Parsing;
  import org.miaixz.bus.health.builtin.hardware.VirtualMemory;
  import org.miaixz.bus.health.builtin.hardware.common.AbstractGlobalMemory;
  import org.miaixz.bus.health.unix.platform.freebsd.BsdSysctlKit;
  
  /**
   * Memory obtained by sysctl vm.stats
   *
   * @author Kimi Liu
   * @since Java 17+
   */
  @ThreadSafe
  final class FreeBsdGlobalMemory extends AbstractGlobalMemory {
  
      private final Supplier<Long> total = Memoizer.memoize(FreeBsdGlobalMemory::queryPhysMem);
      private final Supplier<Long> pageSize = Memoizer.memoize(FreeBsdGlobalMemory::queryPageSize);
      private final Supplier<Long> available = Memoizer.memoize(this::queryVmStats, Memoizer.defaultExpiration());
      private final Supplier<VirtualMemory> vm = Memoizer.memoize(this::createVirtualMemory);
  
      private static long queryPhysMem() {
          return BsdSysctlKit.sysctl("hw.physmem", 0L);
      }
  
      private static long queryPageSize() {
          // sysctl hw.pagesize doesn't work on FreeBSD 13
          return Parsing.parseLongOrDefault(Executor.getFirstAnswer("sysconf PAGESIZE"), 4096L);
      }
  
      @Override
      public long getAvailable() {
          return available.get();
      }
  
      @Override
      public long getTotal() {
          return total.get();
      }
  
      @Override
      public long getPageSize() {
          return pageSize.get();
      }
  
      @Override
      public VirtualMemory getVirtualMemory() {
          return vm.get();
      }
  
      private long queryVmStats() {
          // cached removed in FreeBSD 12 but was always set to 0
          int inactive = BsdSysctlKit.sysctl("vm.stats.vm.v_inactive_count", 0);
          int free = BsdSysctlKit.sysctl("vm.stats.vm.v_free_count", 0);
          return (inactive + free) * getPageSize();
      }
  
      private VirtualMemory createVirtualMemory() {
          return new FreeBsdVirtualMemory(this);
      }
  
  }
  