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weak: move internal/weak to weak, and update according to proposal

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The updates are:
- API documentation changes.
- Removal of the old package documentation discouraging linkname.
- Addition of new package documentation with some advice.
- Renaming of weak.Pointer.Strong -> weak.Pointer.Value.

Fixes #67552.

Change-Id: Ifad7e629b6d339dacaf2ca37b459d7f903e31bf8
Reviewed-on: https://go-review.googlesource.com/c/go/+/628455
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
This commit is contained in:
Michael Anthony Knyszek 2024-11-15 20:42:32 +00:00 • committed by Gopher Robot
parent 5e82cba9bd
commit a65f1a467f
15 changed files with 129 additions and 110 deletions
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4
src/runtime/mheap.go
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@ -2092,12 +2092,12 @@ type specialWeakHandle struct {
handle *atomic.Uintptr
}
//go:linkname internal_weak_runtime_registerWeakPointer internal/weak.runtime_registerWeakPointer
//go:linkname internal_weak_runtime_registerWeakPointer weak.runtime_registerWeakPointer
func internal_weak_runtime_registerWeakPointer(p unsafe.Pointer) unsafe.Pointer {
return unsafe.Pointer(getOrAddWeakHandle(unsafe.Pointer(p)))
}
//go:linkname internal_weak_runtime_makeStrongFromWeak internal/weak.runtime_makeStrongFromWeak
//go:linkname internal_weak_runtime_makeStrongFromWeak weak.runtime_makeStrongFromWeak
func internal_weak_runtime_makeStrongFromWeak(u unsafe.Pointer) unsafe.Pointer {
handle := (*atomic.Uintptr)(u)