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      1 /*
      2  * Copyright (C) 2009 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 ANDROID_RS_THREAD_IO_H
     18 #define ANDROID_RS_THREAD_IO_H
     19 
     20 #include "rsUtils.h"
     21 #include "rsFifoSocket.h"
     22 
     23 // ---------------------------------------------------------------------------
     24 namespace android {
     25 namespace renderscript {
     26 
     27 class Context;
     28 
     29 class ThreadIO {
     30 public:
     31     ThreadIO();
     32     ~ThreadIO();
     33 
     34     bool init();
     35     void shutdown();
     36 
     37     size_t getMaxInlineSize() {
     38         return mMaxInlineSize;
     39     }
     40 
     41     // Plays back commands from the client.
     42     // Returns true if any commands were processed.
     43     bool playCoreCommands(Context *con, int waitFd);
     44 
     45     void setTimeoutCallback(void (*)(void *), void *, uint64_t timeout);
     46 
     47     void * coreHeader(uint32_t, size_t dataLen);
     48     void coreCommit();
     49 
     50     void coreSetReturn(const void *data, size_t dataLen);
     51     void coreGetReturn(void *data, size_t dataLen);
     52     void coreWrite(const void *data, size_t len);
     53     void coreRead(void *data, size_t len);
     54 
     55     void asyncSetReturn(const void *data, size_t dataLen);
     56     void asyncGetReturn(void *data, size_t dataLen);
     57     void asyncWrite(const void *data, size_t len);
     58     void asyncRead(void *data, size_t len);
     59 
     60 
     61     RsMessageToClientType getClientHeader(size_t *receiveLen, uint32_t *usrID);
     62     RsMessageToClientType getClientPayload(void *data, size_t *receiveLen, uint32_t *subID, size_t bufferLen);
     63     bool sendToClient(RsMessageToClientType cmdID, uint32_t usrID, const void *data, size_t dataLen, bool waitForSpace);
     64     void clientShutdown();
     65 
     66 
     67 protected:
     68     typedef struct CoreCmdHeaderRec {
     69         uint32_t cmdID;
     70         uint32_t bytes;
     71     } CoreCmdHeader;
     72     typedef struct ClientCmdHeaderRec {
     73         uint32_t cmdID;
     74         uint32_t bytes;
     75         uint32_t userID;
     76     } ClientCmdHeader;
     77     ClientCmdHeader mLastClientHeader;
     78 
     79     bool mRunning;
     80     size_t mMaxInlineSize;
     81 
     82     FifoSocket mToClient;
     83     FifoSocket mToCore;
     84 
     85     intptr_t mToCoreRet;
     86 
     87     size_t mSendLen;
     88     uint8_t mSendBuffer[2 * 1024] __attribute__((aligned(sizeof(double))));
     89 
     90 };
     91 
     92 
     93 } // namespace renderscript
     94 } // namespace android
     95 #endif
     96 
     97