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