Reland: Refactor current GAE abstraction library to be free of the SDK*

go/src/infra/gae/libs/wrapper/unsafe/memcache.go

Index: go/src/infra/gae/libs/wrapper/unsafe/memcache.go
diff --git a/go/src/infra/gae/libs/wrapper/unsafe/memcache.go b/go/src/infra/gae/libs/wrapper/unsafe/memcache.go
deleted file mode 100644
index db7ad3b6f79f82c16e814e311fe9a31334d29865..0000000000000000000000000000000000000000
--- a/go/src/infra/gae/libs/wrapper/unsafe/memcache.go
+++ /dev/null
@@ -1,58 +0,0 @@
-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-package unsafe
-
-import (
-	"time"
-
-	"unsafe"
-
-	"appengine/memcache"
-)
-
-// Item is duplicated from appengine/memcache.
-type Item struct {
-	Key        string
-	Value      []byte
-	Object     interface{}
-	Flags      uint32
-	Expiration time.Duration
-	CasID      uint64
-}
-
-func init() {
-	// we can't actually refer to casID by name, but we can refer to everything
-	// else, and ensure that everything lines up. This should catch an api change,
-	// but wouldn't catch something like uint64 -> int64.
-	if unsafe.Sizeof(memcache.Item{}) != unsafe.Sizeof(Item{}) {
-		panic("memcache.Item and Item mismatch sizes")
-	}
-	if unsafe.Offsetof(memcache.Item{}.Key) != unsafe.Offsetof(Item{}.Key) {
-		panic("memcache.Item and Item mismatch Key")
-	}
-	if unsafe.Offsetof(memcache.Item{}.Value) != unsafe.Offsetof(Item{}.Value) {
-		panic("memcache.Item and Item mismatch Value")
-	}
-	if unsafe.Offsetof(memcache.Item{}.Object) != unsafe.Offsetof(Item{}.Object) {
-		panic("memcache.Item and Item mismatch Object")
-	}
-	if unsafe.Offsetof(memcache.Item{}.Flags) != unsafe.Offsetof(Item{}.Flags) {
-		panic("memcache.Item and Item mismatch Flags")
-	}
-	if unsafe.Offsetof(memcache.Item{}.Expiration) != unsafe.Offsetof(Item{}.Expiration) {
-		panic("memcache.Item and Item mismatch Expiration")
-	}
-}
-
-// MCSetCasID sets the private .casID field of memcache.Item.
-func MCSetCasID(i *memcache.Item, val uint64) {
-	mci := (*Item)(unsafe.Pointer(i))
-	mci.CasID = val
-}
-
-// MCGetCasID retrieves the private .casID field of memcache.Item.
-func MCGetCasID(i *memcache.Item) uint64 {
-	return (*Item)(unsafe.Pointer(i)).CasID
-}