header.h 文件参考

Common timestamp and sequencing metadata header for VLink zero-copy data types. 更多...

#include <cstdint>
#include "../base/macros.h"

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命名空间
namespace	vlink
namespace	vlink::zerocopy

函数
struct	vlink::zerocopy::VLINK_EXPORT_AND_ALIGNED (8) CameraFrame final

详细描述

Common timestamp and sequencing metadata header for VLink zero-copy data types.

Header is a fixed-size (40-byte) POD structure that is embedded as the first public member in all VLink zero-copy containers (RawData, CameraFrame, PointCloud). It carries per-message timing and identification fields that survive binary serialisation intact because the entire container struct is memcpy'd into the wire buffer.

The layout is verified at compile time:

static_assert(sizeof(Header) == 40, "Sizeof must be 40 bytes.");

Memory layout

Offset  Size  Field
------  ----  ----------
 0      16    frame_id
16       4    seq
20       4    reserved
24       8    time_meas
32       8    time_pub

注解

• All fields are plain data; no virtual functions, no dynamic allocation.
• The struct is 8-byte aligned (VLINK_EXPORT_AND_ALIGNED(8)) to ensure consistent padding across compilers and architectures.
• 32-bit architectures (arm, x86, i386) emit a compile-time warning and are not officially supported for zero-copy types.