/*
    * Copyright 2020-2022 The OSHI Project Contributors
    * SPDX-License-Identifier: MIT
    */
   package oshi.driver.unix.aix.perfstat;
   
   import com.sun.jna.platform.unix.aix.Perfstat;
   import com.sun.jna.platform.unix.aix.Perfstat.perfstat_memory_total_t;
   
  import oshi.annotation.concurrent.ThreadSafe;
  
  /**
   * Utility to query performance stats for memory
   */
  @ThreadSafe
  public final class PerfstatMemory {
  
      private static final Perfstat PERF = Perfstat.INSTANCE;
  
      private PerfstatMemory() {
      }
  
      /**
       * Queries perfstat_memory_total for total memory usage statistics
       *
       * @return usage statistics
       */
      public static perfstat_memory_total_t queryMemoryTotal() {
          perfstat_memory_total_t memory = new perfstat_memory_total_t();
          int ret = PERF.perfstat_memory_total(null, memory, memory.size(), 1);
          if (ret > 0) {
              return memory;
          }
          return new perfstat_memory_total_t();
      }
  }