CpuCoreMetrics

数据结构

字节索引	类型	字段含义
0-3	float32	CPU 使用率 [%]
4-7	float32	CPU 频率 [MHz]

CpuCoreMetrics 固定为 8 字节

示例

C++ 示例

struct CpuCoreMetrics {
  float usage;
  float frequency;
};

Rust 示例

#[repr(C)]
#[derive(Clone, Copy, Debug, Default)]
pub struct CpuCoreMetrics {
    pub usage: f32,
    pub frequency: f32,
}

const _: () = {
    assert!(core::mem::size_of::<CpuCoreMetrics>() == 8);
    assert!(core::mem::align_of::<CpuCoreMetrics>() == 4);
};

Dart 示例

import 'dart:typed_data';

final class CpuCoreMetricsView {
  static const int byteLength = 8;

  final ByteData data;

  CpuCoreMetricsView(ByteBuffer buffer, [int offsetInBytes = 0])
      : data = ByteData.view(buffer, offsetInBytes, byteLength);

  double get usage => data.getFloat32(0, Endian.little);
  double get frequency => data.getFloat32(4, Endian.little);
}

Java 示例

import java.nio.ByteBuffer;
import java.nio.ByteOrder;

public final class CpuCoreMetricsView {
  public static final int BYTE_LENGTH = 8;

  private final ByteBuffer buffer;
  private final int offset;

  public CpuCoreMetricsView(ByteBuffer buffer, int offset) {
    if (offset < 0 || offset + BYTE_LENGTH > buffer.capacity()) {
      throw new IndexOutOfBoundsException("CpuCoreMetrics payload requires 8 bytes");
    }
    this.buffer = buffer.order(ByteOrder.LITTLE_ENDIAN);
    this.offset = offset;
  }

  public float usage() { return buffer.getFloat(offset); }
  public float frequency() { return buffer.getFloat(offset + 4); }
}