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address comments.

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Signed-off-by: doujiang24 <doujiang24@gmail.com>
This commit is contained in:
doujiang24 2023-09-13 17:42:19 +08:00
parent 418b1ad7f2
commit 560a581b63
1 changed files with 8 additions and 7 deletions
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15
src/runtime/pinner.go
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@ -25,10 +25,8 @@ type Pinner struct {
// objects, these objects must be pinned separately if they are going to be
// accessed from C code.
//
// The argument must be a pointer of any type or an
// unsafe.Pointer. It must be the result of calling new,
// taking the address of a composite literal, or taking the address of a
// local variable. If one of these conditions is not met, Pin will panic.
// The argument must be a pointer of any type or an unsafe.Pointer.
// It's safe to call Pin on non-Go pointers, in which case Pin will do nothing.
func (p *Pinner) Pin(pointer any) {
if p.pinner == nil {
// Check the pinner cache first.
@ -144,14 +142,17 @@ func isPinned(ptr unsafe.Pointer) bool {
return pinState.isPinned()
}
// setPinned marks or unmarks a Go pointer as pinned.
// setPinned marks or unmarks a Go pointer as pinned, when the ptr is a Go pointer.
// It will be ignored while try to pin a non-Go pointer,
// and it will be panic while try to unpin a non-Go pointer,
// which should not happen in normal usage.
func setPinned(ptr unsafe.Pointer, pin bool) bool {
span := spanOfHeap(uintptr(ptr))
if span == nil {
if !pin {
panic(errorString("runtime.Pinner.Unpin: unexpected non Go pointer"))
panic(errorString("tried to unpin non-Go pointer"))
}
// this is a linker-allocated, zero size object or other object,
// This is a linker-allocated, zero size object or other object,
// nothing to do, silently ignore it.
return false
}