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| 1 // Copyright 2017 The Chromium OS Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef COMPRESSOR_IO_JAVSCRIPT_STREAM_H_ | |
| 6 #define COMPRESSOR_IO_JAVSCRIPT_STREAM_H_ | |
| 7 | |
| 8 #include <pthread.h> | |
| 9 #include <string> | |
| 10 | |
| 11 #include "archive.h" | |
| 12 #include "ppapi/cpp/instance_handle.h" | |
| 13 #include "ppapi/cpp/var_array_buffer.h" | |
| 14 #include "ppapi/utility/completion_callback_factory.h" | |
| 15 #include "ppapi/utility/threading/lock.h" | |
| 16 #include "ppapi/utility/threading/simple_thread.h" | |
| 17 | |
| 18 #include "compressor_stream.h" | |
| 19 #include "javascript_compressor_requestor_interface.h" | |
| 20 | |
| 21 class CompressorIOJavaScriptStream : public CompressorStream { | |
| 22 public: | |
| 23 CompressorIOJavaScriptStream( | |
| 24 JavaScriptCompressorRequestorInterface* requestor); | |
| 25 | |
| 26 virtual ~CompressorIOJavaScriptStream(); | |
| 27 | |
| 28 virtual int64_t Write(int64_t bytes_to_read, | |
| 29 const pp::VarArrayBuffer& buffer); | |
| 30 | |
| 31 virtual void WriteChunkDone(int64_t write_bytes); | |
| 32 | |
| 33 virtual int64_t Read(int64_t bytes_to_read, char* destination_buffer); | |
| 34 | |
| 35 virtual void ReadFileChunkDone(int64_t read_bytes, | |
| 36 pp::VarArrayBuffer* buffer); | |
| 37 | |
| 38 private: | |
| 39 // A requestor that makes calls to JavaScript to read and write chunks. | |
| 40 JavaScriptCompressorRequestorInterface* requestor_; | |
| 41 | |
| 42 pthread_mutex_t shared_state_lock_; | |
| 43 pthread_cond_t available_data_cond_; | |
| 44 pthread_cond_t data_written_cond_; | |
| 45 | |
| 46 // The bytelength of the data written onto the archive for the last write | |
| 47 // chunk request. If this value is negative, some error occurred when writing | |
| 48 // a chunk in JavaScript. | |
| 49 int64_t written_bytes_; | |
| 50 | |
| 51 // The bytelength of the data read from the entry for the last read file chunk | |
| 52 // request. If this value is negative, some error occurred when reading a | |
| 53 // chunk in JavaScript. | |
| 54 int64_t read_bytes_; | |
| 55 | |
| 56 // True if destination_buffer_ is available. | |
| 57 bool available_data_; | |
| 58 | |
| 59 // Stores the data read from JavaScript. | |
| 60 char* destination_buffer_; | |
| 61 }; | |
| 62 | |
| 63 #endif // COMPRESSOR_IO_JAVSCRIPT_STREAM_H_ | |
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