英文:
Will golang garbage collecting channel of pointers when it's dequeued from channel?
问题
如果我有这样的代码：
requests := make(chan *RequestStruct, 1000 * 1000)
responses := make(chan *ResponseStruct, 1000 * 1000)
如果所有的requests和responses已经被出队/消费完了，之前存在的指针最终会被垃圾回收，对吗？（或者不会被回收，因为没有人将其设置为nil）
英文:
If I have something like this:
requests := make(chan *RequestStruct, 1000 * 1000)
responses := make(chan *ResponseStruct, 1000 * 1000)
If the all requests and responses already dequeued/consumed, those pointers that previously was there would someday will be garbage collected right? (or it won't because nobody ever set it to nil on the channel?)
答案1
得分: 3
通道在runtime/chan.go中实现。从缓冲通道读取是通过函数chanrecv实现的，它执行以下操作：
qp := chanbuf(c, c.recvx)
typedmemmove(c.elemtype, ep, qp)
typedmemclr(c.elemtype, qp)
通道中存储的元素通过typedmemclr清除，因此不会阻止指向的元素被垃圾回收。
英文:
Channels are implemented in runtime/chan.go. Reading from a buffered channel is implemented by the function chanrecv, which does the following:
qp := chanbuf(c, c.recvx)
typedmemmove(c.elemtype, ep, qp)
typedmemclr(c.elemtype, qp)
The element that is stored in the channel is cleared by the typedmemclr, and will therefore not prevent the pointed-at element from being garbage-collected.
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