modules/video_coding/codecs/test/android_test_initializer.cc

/*
 *  Copyright 2017 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#include <pthread.h>

#include "webrtc/modules/video_coding/codecs/test/android_test_initializer.h"
#include "webrtc/rtc_base/ignore_wundef.h"
#include "webrtc/sdk/android/src/jni/classreferenceholder.h"
#include "webrtc/sdk/android/src/jni/jni_helpers.h"

// Note: this dependency is dangerous since it reaches into Chromium's base.
// There's a risk of e.g. macro clashes. This file may only be used in tests.
// Since we use Chrome's build system for creating the gtest binary, this should
// be fine.
RTC_PUSH_IGNORING_WUNDEF()
#include "base/android/jni_android.h"
RTC_POP_IGNORING_WUNDEF()

#include "webrtc/rtc_base/checks.h"

namespace webrtc {

namespace {

static pthread_once_t g_initialize_once = PTHREAD_ONCE_INIT;

// There can only be one JNI_OnLoad in each binary. So since this is a GTEST
// C++ runner binary, we want to initialize the same global objects we normally
// do if this had been a Java binary.
void EnsureInitializedOnce() {
  RTC_CHECK(::base::android::IsVMInitialized());
  JNIEnv* jni = ::base::android::AttachCurrentThread();
  JavaVM* jvm = NULL;
  RTC_CHECK_EQ(0, jni->GetJavaVM(&jvm));

  jint ret = jni::InitGlobalJniVariables(jvm);
  RTC_DCHECK_GE(ret, 0);

  jni::LoadGlobalClassReferenceHolder();
}

}  // namespace

void InitializeAndroidObjects() {
  RTC_CHECK_EQ(0, pthread_once(&g_initialize_once, &EnsureInitializedOnce));
}

}  // namespace webrtc