learning golang again

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Type size

https://golang.org/ref/spec#Size_and_alignment_guarantees

https://github.com/ardanlabs/gotraining-studyguide/blob/master/go/language/struct.go

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type example struct {
	flag    bool
	counter int16
	pi      float32
}

字节对齐系数 #pragma pack(n)

  • 成员对齐
  • 结构体对齐

对齐系数规则

  1. For a variable x of any type: unsafe.Alignof(x) is at least 1.
  2. For a variable x of struct type: unsafe.Alignof(x) is the largest of all the values unsafe.Alignof(x.f) for each field f of x, but at least 1.
  3. For a variable x of array type: unsafe.Alignof(x) is the same as the alignment of a variable of the array’s element type.

layout

  • bool(0)
  • int16(2)
  • float32(4)

8 bytes

https://eddycjy.gitbook.io/golang/di-1-ke-za-tan/go-memory-align

//TODO list