Bootstrap IInputFlingerRust - the Rust component of inputflinger
When inputflinger boots, we create the Rust component of inputflinger,
which we interact with from C++ through the local AIDL interface
IInputFlingerRust.
After we have access to the IInputFlingerRust binder object in C++, all
communication between C++ and Rust can take place purely through AIDL
interfaces.
To initialize the interface, we must first pass a raw pointer to an AIDL
implementation across the language barrier through some other means. In
this CL, we use cxxbridge to bootstrap the local AIDL interface for
IInputFlingerRust.
Bug: 278783893
Test: manual, boot
Change-Id: Ifbd0168ae4fadaa5b357f6064113f1691e6cf5a7
diff --git a/services/inputflinger/rust/Android.bp b/services/inputflinger/rust/Android.bp
new file mode 100644
index 0000000..23c1691
--- /dev/null
+++ b/services/inputflinger/rust/Android.bp
@@ -0,0 +1,52 @@
+// Copyright 2023 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.
+
+// Generate the C++ code that Rust calls into.
+genrule {
+ name: "inputflinger_rs_bootstrap_bridge_code",
+ tools: ["cxxbridge"],
+ cmd: "$(location cxxbridge) $(in) >> $(out)",
+ srcs: ["lib.rs"],
+ out: ["inputflinger_rs_bootstrap_cxx_generated.cc"],
+}
+
+// Generate a C++ header containing the C++ bindings
+// to the Rust exported functions in lib.rs.
+genrule {
+ name: "inputflinger_rs_bootstrap_bridge_header",
+ tools: ["cxxbridge"],
+ cmd: "$(location cxxbridge) $(in) --header >> $(out)",
+ srcs: ["lib.rs"],
+ out: ["inputflinger_bootstrap.rs.h"],
+}
+
+rust_ffi_static {
+ name: "libinputflinger_rs",
+ crate_name: "inputflinger",
+ srcs: ["lib.rs"],
+ rustlibs: [
+ "libcxx",
+ "com.android.server.inputflinger-rust",
+ "libbinder_rs",
+ "liblog_rust",
+ "liblogger",
+ ],
+ host_supported: true,
+}
+
+cc_library_headers {
+ name: "inputflinger_rs_bootstrap_cxx_headers",
+ host_supported: true,
+ export_include_dirs: ["ffi"],
+}