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- // Copyright (C) 2019 The Android Open Source Project
- //
- // Licensed under the Apache License, Version 2.0 (the "License");
- // you may not use this file except in compliance with the License.
- // You may obtain a copy of the License at
- //
- // http://www.apache.org/licenses/LICENSE-2.0
- //
- // Unless required by applicable law or agreed to in writing, software
- // distributed under the License is distributed on an "AS IS" BASIS,
- // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- // See the License for the specific language governing permissions and
- // limitations under the License.
- package cc
- // This file contains a map to redirect dependencies towards sysprop_library.
- // As sysprop_library has to support both Java and C++, sysprop_library internally
- // generates cc_library and java_library. For example, the following sysprop_library
- //
- // sysprop_library {
- // name: "foo",
- // }
- //
- // will internally generate with prefix "lib"
- //
- // cc_library {
- // name: "libfoo",
- // }
- //
- // When a cc module links against "foo", build system will redirect the
- // dependency to "libfoo". To do that, SyspropMutator gathers all sysprop_library,
- // records their cc implementation library names to a map. The map will be used in
- // cc.Module.DepsMutator.
- import (
- "sync"
- "android/soong/android"
- )
- type syspropLibraryInterface interface {
- BaseModuleName() string
- CcImplementationModuleName() string
- }
- var (
- syspropImplLibrariesKey = android.NewOnceKey("syspropImplLibirares")
- syspropImplLibrariesLock sync.Mutex
- )
- func syspropImplLibraries(config android.Config) map[string]string {
- return config.Once(syspropImplLibrariesKey, func() interface{} {
- return make(map[string]string)
- }).(map[string]string)
- }
- // gather list of sysprop libraries
- func SyspropMutator(mctx android.BottomUpMutatorContext) {
- if m, ok := mctx.Module().(syspropLibraryInterface); ok {
- syspropImplLibraries := syspropImplLibraries(mctx.Config())
- syspropImplLibrariesLock.Lock()
- defer syspropImplLibrariesLock.Unlock()
- // BaseModuleName is the name of sysprop_library
- // CcImplementationModuleName is the name of cc_library generated by sysprop_library
- syspropImplLibraries[m.BaseModuleName()] = m.CcImplementationModuleName()
- }
- }
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