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Diffstat (limited to 'webrtc/modules/utility/include/helpers_android.h')
-rw-r--r-- | webrtc/modules/utility/include/helpers_android.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/webrtc/modules/utility/include/helpers_android.h b/webrtc/modules/utility/include/helpers_android.h new file mode 100644 index 0000000000..2840ca965e --- /dev/null +++ b/webrtc/modules/utility/include/helpers_android.h @@ -0,0 +1,87 @@ +/* + * 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. + */ + +#ifndef WEBRTC_MODULES_UTILITY_INCLUDE_HELPERS_ANDROID_H_ +#define WEBRTC_MODULES_UTILITY_INCLUDE_HELPERS_ANDROID_H_ + +#include <jni.h> +#include <string> + +// Abort the process if |jni| has a Java exception pending. +// TODO(henrika): merge with CHECK_JNI_EXCEPTION() in jni_helpers.h. +#define CHECK_EXCEPTION(jni) \ + RTC_CHECK(!jni->ExceptionCheck()) \ + << (jni->ExceptionDescribe(), jni->ExceptionClear(), "") + +namespace webrtc { + +// Return a |JNIEnv*| usable on this thread or NULL if this thread is detached. +JNIEnv* GetEnv(JavaVM* jvm); + +// 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); + +// JNIEnv-helper methods that wraps the API which uses the JNI interface +// pointer (JNIEnv*). It allows us to RTC_CHECK success and that no Java +// exception is thrown while calling the method. +jmethodID GetMethodID( + JNIEnv* jni, jclass c, const char* name, const char* signature); + +jmethodID GetStaticMethodID( + JNIEnv* jni, jclass c, const char* name, const char* signature); + +jclass FindClass(JNIEnv* jni, const char* name); + +jobject NewGlobalRef(JNIEnv* jni, jobject o); + +void DeleteGlobalRef(JNIEnv* jni, jobject o); + +// Return thread ID as a string. +std::string GetThreadId(); + +// Return thread ID as string suitable for debug logging. +std::string GetThreadInfo(); + +// Attach thread to JVM if necessary and detach at scope end if originally +// attached. +class AttachThreadScoped { + public: + explicit AttachThreadScoped(JavaVM* jvm); + ~AttachThreadScoped(); + JNIEnv* env(); + + private: + bool attached_; + JavaVM* jvm_; + JNIEnv* env_; +}; + +// Scoped holder for global Java refs. +template<class T> // T is jclass, jobject, jintArray, etc. +class ScopedGlobalRef { + public: + ScopedGlobalRef(JNIEnv* jni, T obj) + : jni_(jni), obj_(static_cast<T>(NewGlobalRef(jni, obj))) {} + ~ScopedGlobalRef() { + DeleteGlobalRef(jni_, obj_); + } + T operator*() const { + return obj_; + } + private: + JNIEnv* jni_; + T obj_; +}; + +} // namespace webrtc + +#endif // WEBRTC_MODULES_UTILITY_INCLUDE_HELPERS_ANDROID_H_ |