John Reck | cec24ae | 2013-11-05 13:27:50 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef RENDERTASK_H_ |
| 18 | #define RENDERTASK_H_ |
| 19 | |
| 20 | #include <cutils/compiler.h> |
John Reck | 4f02bf4 | 2014-01-03 18:09:17 -0800 | [diff] [blame] | 21 | #include <utils/Timers.h> |
John Reck | cec24ae | 2013-11-05 13:27:50 -0800 | [diff] [blame] | 22 | |
| 23 | namespace android { |
John Reck | 4f02bf4 | 2014-01-03 18:09:17 -0800 | [diff] [blame] | 24 | class Mutex; |
| 25 | class Condition; |
John Reck | cec24ae | 2013-11-05 13:27:50 -0800 | [diff] [blame] | 26 | namespace uirenderer { |
| 27 | namespace renderthread { |
| 28 | |
John Reck | 4f02bf4 | 2014-01-03 18:09:17 -0800 | [diff] [blame] | 29 | #define METHOD_INVOKE_PAYLOAD_SIZE (8 * sizeof(void*)) |
| 30 | |
| 31 | /* |
| 32 | * Notes about memory management |
| 33 | * |
| 34 | * RenderThread will only invoke RenderTask::run(). It is the responsibility |
| 35 | * of the RenderTask to know if it needs to suicide at the end of run() or |
| 36 | * if some other lifecycle is being used. As such, it is not valid to reference |
| 37 | * anything on RenderTask after the first call to run(). |
| 38 | * |
| 39 | * For example SignalingRenderTask |
| 40 | * is expected to be stack allocated by the calling thread, so it does not |
| 41 | * suicide in run() but instead relies on the caller to destroy it. |
| 42 | * |
| 43 | * MethodInvokeRenderTask however is currently allocated with new, so it will |
| 44 | * suicide at the end of run(). TODO: Replace this with a small pool to avoid |
| 45 | * malloc/free churn of small objects? |
| 46 | */ |
| 47 | |
John Reck | cec24ae | 2013-11-05 13:27:50 -0800 | [diff] [blame] | 48 | class ANDROID_API RenderTask { |
| 49 | public: |
John Reck | 4f02bf4 | 2014-01-03 18:09:17 -0800 | [diff] [blame] | 50 | ANDROID_API RenderTask() : mNext(0), mRunAt(0) {} |
| 51 | ANDROID_API virtual ~RenderTask() {} |
John Reck | cec24ae | 2013-11-05 13:27:50 -0800 | [diff] [blame] | 52 | |
| 53 | ANDROID_API virtual void run() = 0; |
| 54 | |
| 55 | RenderTask* mNext; |
John Reck | a6260b8 | 2014-01-29 18:31:51 -0800 | [diff] [blame] | 56 | nsecs_t mRunAt; // nano-seconds on the SYSTEM_TIME_MONOTONIC clock |
John Reck | 4f02bf4 | 2014-01-03 18:09:17 -0800 | [diff] [blame] | 57 | }; |
| 58 | |
| 59 | class SignalingRenderTask : public RenderTask { |
| 60 | public: |
| 61 | // Takes ownership of task, caller owns lock and signal |
| 62 | SignalingRenderTask(RenderTask* task, Mutex* lock, Condition* signal) |
| 63 | : mTask(task), mLock(lock), mSignal(signal) {} |
| 64 | virtual void run(); |
| 65 | |
| 66 | private: |
| 67 | RenderTask* mTask; |
| 68 | Mutex* mLock; |
| 69 | Condition* mSignal; |
| 70 | }; |
| 71 | |
| 72 | typedef void* (*RunnableMethod)(void* data); |
| 73 | |
| 74 | class MethodInvokeRenderTask : public RenderTask { |
| 75 | public: |
| 76 | MethodInvokeRenderTask(RunnableMethod method) |
| 77 | : mMethod(method), mReturnPtr(0) {} |
| 78 | |
| 79 | void* payload() { return mData; } |
| 80 | void setReturnPtr(void** retptr) { mReturnPtr = retptr; } |
| 81 | |
| 82 | virtual void run() { |
| 83 | void* retval = mMethod(mData); |
| 84 | if (mReturnPtr) { |
| 85 | *mReturnPtr = retval; |
| 86 | } |
| 87 | // Commit suicide |
| 88 | delete this; |
| 89 | } |
| 90 | private: |
| 91 | RunnableMethod mMethod; |
| 92 | char mData[METHOD_INVOKE_PAYLOAD_SIZE]; |
| 93 | void** mReturnPtr; |
John Reck | cec24ae | 2013-11-05 13:27:50 -0800 | [diff] [blame] | 94 | }; |
| 95 | |
| 96 | } /* namespace renderthread */ |
| 97 | } /* namespace uirenderer */ |
| 98 | } /* namespace android */ |
| 99 | #endif /* RENDERTASK_H_ */ |