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/*
* 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_INTERFACE_HELPERS_ANDROID_H_
#define WEBRTC_MODULES_UTILITY_INTERFACE_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_INTERFACE_HELPERS_ANDROID_H_
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