base/android/important_file_writer_android.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/android/important_file_writer_android.h"
   6
   7 #include <string>
   8
   9 #include "base/android/jni_string.h"
  10 #include "base/files/important_file_writer.h"
  11 #include "base/threading/thread_restrictions.h"
  12 #include "jni/ImportantFileWriterAndroid_jni.h"
  13
  14 namespace base {
  15 namespace android {
  16
  17 static jboolean WriteFileAtomically(JNIEnv* env,
  18                                     jclass /* clazz */,
  19                                     jstring file_name,
  20                                     jbyteArray data) {
  21   // This is called on the UI thread during shutdown to save tab data, so
  22   // needs to enable IO.
  23   base::ThreadRestrictions::ScopedAllowIO allow_io;
  24   std::string native_file_name;
  25   base::android::ConvertJavaStringToUTF8(env, file_name, &native_file_name);
  26   base::FilePath path(native_file_name);
  27   int data_length = env->GetArrayLength(data);
  28   jbyte* native_data = env->GetByteArrayElements(data, NULL);
  29   std::string native_data_string(reinterpret_cast<char *>(native_data),
  30                                  data_length);
  31   bool result = base::ImportantFileWriter::WriteFileAtomically(
  32       path, native_data_string);
  33   env->ReleaseByteArrayElements(data, native_data, JNI_ABORT);
  34   return result;
  35 }
  36
  37 bool RegisterImportantFileWriterAndroid(JNIEnv* env) {
  38   return RegisterNativesImpl(env);
  39 }
  40
  41 }  // namespace android
  42 }  // namespace base