/*
|
* Copyright (C) 2010 The Android Open Source Project
|
*
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
* you may not use this file except in compliance with the License.
|
* You may obtain a copy of the License at
|
*
|
* http://www.apache.org/licenses/LICENSE-2.0
|
*
|
* Unless required by applicable law or agreed to in writing, software
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
* See the License for the specific language governing permissions and
|
* limitations under the License.
|
*/
|
|
#ifndef _ANDROID_OS_MESSAGEQUEUE_H
|
#define _ANDROID_OS_MESSAGEQUEUE_H
|
|
#include "jni.h"
|
#include <utils/Looper.h>
|
|
namespace android {
|
|
class MessageQueue : public virtual RefBase {
|
public:
|
/* Gets the message queue's looper. */
|
inline sp<Looper> getLooper() const {
|
return mLooper;
|
}
|
|
/* Checks whether the JNI environment has a pending exception.
|
*
|
* If an exception occurred, logs it together with the specified message,
|
* and calls raiseException() to ensure the exception will be raised when
|
* the callback returns, clears the pending exception from the environment,
|
* then returns true.
|
*
|
* If no exception occurred, returns false.
|
*/
|
bool raiseAndClearException(JNIEnv* env, const char* msg);
|
|
/* Raises an exception from within a callback function.
|
* The exception will be rethrown when control returns to the message queue which
|
* will typically cause the application to crash.
|
*
|
* This message can only be called from within a callback function. If it is called
|
* at any other time, the process will simply be killed.
|
*
|
* Does nothing if exception is NULL.
|
*
|
* (This method does not take ownership of the exception object reference.
|
* The caller is responsible for releasing its reference when it is done.)
|
*/
|
virtual void raiseException(JNIEnv* env, const char* msg, jthrowable exceptionObj) = 0;
|
|
protected:
|
MessageQueue();
|
virtual ~MessageQueue();
|
|
protected:
|
sp<Looper> mLooper;
|
};
|
|
/* Gets the native object associated with a MessageQueue. */
|
extern sp<MessageQueue> android_os_MessageQueue_getMessageQueue(
|
JNIEnv* env, jobject messageQueueObj);
|
|
} // namespace android
|
|
#endif // _ANDROID_OS_MESSAGEQUEUE_H
|
