有没有办法为共享内存数组设置默认值? [英] Is there a way of setting default value for shared memory array?

问题描述

考虑以下代码:

__global__ void kernel(int *something) {
extern __shared__ int shared_array[];     

// Some operations on shared_array here.

}

是否可以将整个 shared_array 设置为某个值 - 例如0 - 没有明确解决某个线程中的每个单元格?

Is it possible to set whole shared_array to some value - e.g. 0 - without explicitly addressing each cell in some thread?

推荐答案

没有.共享内存未初始化.您必须以某种方式自己初始化它...

No. Shared memory is uninitialised. You have to somehow initialise it yourself, one way or another...

来自 CUDA C 编程指南 3.2，B.2.4.2 节，第 2 段:

From CUDA C Programming Guide 3.2, Section B.2.4.2, paragraph 2:

__shared__ 变量不能将初始化作为其声明的一部分.

__shared__ variables cannot have an initialization as part of their declaration.

这也会丢弃共享变量的重要默认构造函数.

This also discards nontrivial default constructors for shared variables.

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