1 /*
2  * Copyright (C) 2006 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_HARDWARE_BUFFEREDTEXTOUTPUT_H
18 #define ANDROID_HARDWARE_BUFFEREDTEXTOUTPUT_H
19 
20 #include <hwbinder/TextOutput.h>
21 #include <utils/threads.h>
22 #include <sys/uio.h>
23 
24 // ---------------------------------------------------------------------------
25 namespace android {
26 namespace hardware {
27 
28 class BufferedTextOutput : public TextOutput
29 {
30 public:
31     //** Flags for constructor */
32     enum {
33         MULTITHREADED = 0x0001
34     };
35 
36                         BufferedTextOutput(uint32_t flags = 0);
37     virtual             ~BufferedTextOutput();
38 
39     virtual status_t    print(const char* txt, size_t len);
40     virtual void        moveIndent(int delta);
41 
42     virtual void        pushBundle();
43     virtual void        popBundle();
44 
45 protected:
46     virtual status_t    writeLines(const struct iovec& vec, size_t N) = 0;
47 
48 private:
49     struct BufferState;
50     struct ThreadState;
51 
52     static  ThreadState*getThreadState();
53     static  void        threadDestructor(void *st);
54 
55             BufferState*getBuffer() const;
56 
57     uint32_t            mFlags;
58     const int32_t       mSeq;
59     const int32_t       mIndex;
60 
61     Mutex               mLock;
62     BufferState*        mGlobalState;
63 };
64 
65 // ---------------------------------------------------------------------------
66 }; // namespace hardware
67 }; // namespace android
68 
69 #endif // ANDROID_HARDWARE_BUFFEREDTEXTOUTPUT_H
70