Prepare for a type-safe OnceKey
Add an opaque OnceKey type and use it for all calls to Once in
build/soong. A future patch will convert the arguments to
Once* to OnceKey once users outside build/soong have been updated.
Test: onceper_test.go
Change-Id: Ifcb338e6e603e804e507203c9508d30ffb2df966
diff --git a/android/apex.go b/android/apex.go
index a93baf6..bf11ba2 100644
--- a/android/apex.go
+++ b/android/apex.go
@@ -139,6 +139,7 @@
var apexData OncePer
var apexNamesMapMutex sync.Mutex
+var apexNamesKey = NewOnceKey("apexNames")
// This structure maintains the global mapping in between modules and APEXes.
// Examples:
@@ -147,7 +148,7 @@
// apexNamesMap()["foo"]["bar"] == false: module foo is indirectly depended on by APEX bar
// apexNamesMap()["foo"]["bar"] doesn't exist: foo is not built for APEX bar
func apexNamesMap() map[string]map[string]bool {
- return apexData.Once("apexNames", func() interface{} {
+ return apexData.Once(apexNamesKey, func() interface{} {
return make(map[string]map[string]bool)
}).(map[string]map[string]bool)
}