installd: Replace Dex2oatFileWrapper with UniqueFile
UniqueFile is based on the original Dex2oatFileWrapper, but support
extra features. The class now maintains the file path as a member
variable. This the client to access both fd and file path when they see
fit. As a result, the client no longer provides the cleanup function
with a closure capture, since the class can provide the file path.
Additionally, reduce code duplication in constructors.
Bug: 161470356
Test: atest run_dex2oat_test
Test: atest installd_dexopt_test
Change-Id: I1b66bc58b1885933d1601fdc2f4218c4a262d9f3
diff --git a/cmds/installd/unique_file.cpp b/cmds/installd/unique_file.cpp
new file mode 100644
index 0000000..e99ce1e
--- /dev/null
+++ b/cmds/installd/unique_file.cpp
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2020 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.
+ */
+
+#include "unique_file.h"
+
+#include <string>
+
+#include <unistd.h>
+
+#include <android-base/logging.h>
+
+namespace android {
+namespace installd {
+
+UniqueFile::UniqueFile() : UniqueFile(-1, "") {}
+
+UniqueFile::UniqueFile(int value, std::string path) : UniqueFile(value, path, nullptr) {}
+
+UniqueFile::UniqueFile(int value, std::string path, CleanUpFunction cleanup)
+ : value_(value), path_(path), cleanup_(cleanup), do_cleanup_(true), auto_close_(true) {}
+
+UniqueFile::UniqueFile(UniqueFile&& other) {
+ *this = std::move(other);
+}
+
+UniqueFile::~UniqueFile() {
+ reset();
+}
+
+UniqueFile& UniqueFile::operator=(UniqueFile&& other) {
+ value_ = other.value_;
+ path_ = other.path_;
+ cleanup_ = other.cleanup_;
+ do_cleanup_ = other.do_cleanup_;
+ auto_close_ = other.auto_close_;
+ other.release();
+ return *this;
+}
+
+void UniqueFile::reset() {
+ reset(-1, "");
+}
+
+void UniqueFile::reset(int new_value, std::string path, CleanUpFunction new_cleanup) {
+ if (auto_close_ && value_ >= 0) {
+ if (close(value_) < 0) {
+ PLOG(ERROR) << "Failed to close fd " << value_ << ", with path " << path;
+ }
+ }
+ if (do_cleanup_ && cleanup_ != nullptr) {
+ cleanup_(path_);
+ }
+
+ value_ = new_value;
+ path_ = path;
+ cleanup_ = new_cleanup;
+}
+
+void UniqueFile::release() {
+ value_ = -1;
+ path_ = "";
+ do_cleanup_ = false;
+ cleanup_ = nullptr;
+}
+
+} // namespace installd
+} // namespace android