1 files changed, 117 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/utility/source/helpers_android.cc b/third_party/libwebrtc/modules/utility/source/helpers_android.cc
new file mode 100644
index 0000000000..9cfee8a2af
--- /dev/null
+++ b/third_party/libwebrtc/modules/utility/source/helpers_android.cc
@@ -0,0 +1,117 @@
+/*
+ *  Copyright (c) 2013 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 "modules/utility/include/helpers_android.h"
+
+#include <android/log.h>
+#include <pthread.h>
+#include <stddef.h>
+#include <unistd.h>
+
+#include "rtc_base/checks.h"
+#include "rtc_base/platform_thread.h"
+
+#define TAG "HelpersAndroid"
+#define ALOGD(...) __android_log_print(ANDROID_LOG_DEBUG, TAG, __VA_ARGS__)
+
+namespace webrtc {
+
+JNIEnv* GetEnv(JavaVM* jvm) {
+  void* env = NULL;
+  jint status = jvm->GetEnv(&env, JNI_VERSION_1_6);
+  RTC_CHECK(((env != NULL) && (status == JNI_OK)) ||
+            ((env == NULL) && (status == JNI_EDETACHED)))
+      << "Unexpected GetEnv return: " << status << ":" << env;
+  return reinterpret_cast<JNIEnv*>(env);
+}
+
+// Return a `jlong` that will correctly convert back to `ptr`.  This is needed
+// because the alternative (of silently passing a 32-bit pointer to a vararg
+// function expecting a 64-bit param) picks up garbage in the high 32 bits.
+jlong PointerTojlong(void* ptr) {
+  static_assert(sizeof(intptr_t) <= sizeof(jlong),
+                "Time to rethink the use of jlongs");
+  // Going through intptr_t to be obvious about the definedness of the
+  // conversion from pointer to integral type.  intptr_t to jlong is a standard
+  // widening by the static_assert above.
+  jlong ret = reinterpret_cast<intptr_t>(ptr);
+  RTC_DCHECK(reinterpret_cast<void*>(ret) == ptr);
+  return ret;
+}
+
+jmethodID GetMethodID(JNIEnv* jni,
+                      jclass c,
+                      const char* name,
+                      const char* signature) {
+  jmethodID m = jni->GetMethodID(c, name, signature);
+  CHECK_EXCEPTION(jni) << "Error during GetMethodID: " << name << ", "
+                       << signature;
+  RTC_CHECK(m) << name << ", " << signature;
+  return m;
+}
+
+jmethodID GetStaticMethodID(JNIEnv* jni,
+                            jclass c,
+                            const char* name,
+                            const char* signature) {
+  jmethodID m = jni->GetStaticMethodID(c, name, signature);
+  CHECK_EXCEPTION(jni) << "Error during GetStaticMethodID: " << name << ", "
+                       << signature;
+  RTC_CHECK(m) << name << ", " << signature;
+  return m;
+}
+
+jclass FindClass(JNIEnv* jni, const char* name) {
+  jclass c = jni->FindClass(name);
+  CHECK_EXCEPTION(jni) << "Error during FindClass: " << name;
+  RTC_CHECK(c) << name;
+  return c;
+}
+
+jobject NewGlobalRef(JNIEnv* jni, jobject o) {
+  jobject ret = jni->NewGlobalRef(o);
+  CHECK_EXCEPTION(jni) << "Error during NewGlobalRef";
+  RTC_CHECK(ret);
+  return ret;
+}
+
+void DeleteGlobalRef(JNIEnv* jni, jobject o) {
+  jni->DeleteGlobalRef(o);
+  CHECK_EXCEPTION(jni) << "Error during DeleteGlobalRef";
+}
+
+AttachThreadScoped::AttachThreadScoped(JavaVM* jvm)
+    : attached_(false), jvm_(jvm), env_(NULL) {
+  env_ = GetEnv(jvm);
+  if (!env_) {
+    // Adding debug log here so we can track down potential leaks and figure
+    // out why we sometimes see "Native thread exiting without having called
+    // DetachCurrentThread" in logcat outputs.
+    ALOGD("Attaching thread to JVM[tid=%d]", rtc::CurrentThreadId());
+    jint res = jvm->AttachCurrentThread(&env_, NULL);
+    attached_ = (res == JNI_OK);
+    RTC_CHECK(attached_) << "AttachCurrentThread failed: " << res;
+  }
+}
+
+AttachThreadScoped::~AttachThreadScoped() {
+  if (attached_) {
+    ALOGD("Detaching thread from JVM[tid=%d]", rtc::CurrentThreadId());
+    jint res = jvm_->DetachCurrentThread();
+    RTC_CHECK(res == JNI_OK) << "DetachCurrentThread failed: " << res;
+    RTC_CHECK(!GetEnv(jvm_));
+  }
+}
+
+JNIEnv* AttachThreadScoped::env() {
+  return env_;
+}
+
+}  // namespace webrtc