BufferedTextOutput.h revision 002e1e58dfe19dd3e49a59c6827cbf51573941a2 
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 <utils/threads.h>
22#include <cutils/uio.h>
23
24// ---------------------------------------------------------------------------
25namespace android {
26
27class BufferedTextOutput : public TextOutput
28{
29public:
30    //** Flags for constructor */
31    enum {
32        MULTITHREADED = 0x0001
33    };
34
35                        BufferedTextOutput(uint32_t flags = 0);
36    virtual             ~BufferedTextOutput();
37
38    virtual status_t    print(const char* txt, size_t len);
39    virtual void        moveIndent(int delta);
40
41    virtual void        pushBundle();
42    virtual void        popBundle();
43
44protected:
45    virtual status_t    writeLines(const struct iovec& vec, size_t N) = 0;
46
47private:
48    struct BufferState;
49    struct ThreadState;
50
51    static  ThreadState*getThreadState();
52    static  void        threadDestructor(void *st);
53
54            BufferState*getBuffer() const;
55
56    uint32_t            mFlags;
57    const int32_t       mSeq;
58    const int32_t       mIndex;
59
60    Mutex               mLock;
61    BufferState*        mGlobalState;
62};
63
64// ---------------------------------------------------------------------------
65}; // namespace android
66
67#endif // ANDROID_BUFFEREDTEXTOUTPUT_H
68