2 * Copyright (c) 2011 Samsung Electronics Co., Ltd All Rights Reserved
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 * @file named_input_pipe.cpp
18 * @author Przemyslaw Dobrowolski (p.dobrowolsk@samsung.com)
20 * @brief This file is the implementation file of named input pipe
22 #include <dpl/file_input.h>
23 #include <dpl/binary_queue.h>
24 #include <dpl/log/log.h>
32 namespace // anonymous
34 const size_t DEFAULT_READ_BUFFER_SIZE = 4096;
35 } // namespace anonymous
37 FileInput::FileInput()
42 FileInput::FileInput(const std::string& fileName)
48 FileInput::~FileInput()
53 void FileInput::Open(const std::string& fileName)
56 int fd = TEMP_FAILURE_RETRY(open(fileName.c_str(), O_RDONLY | O_NONBLOCK));
58 // Throw an exception if an error occurred
60 ThrowMsg(Exception::OpenFailed, fileName);
62 // Close if any existing
65 // Save new descriptor
68 LogPedantic("Opened file: " << fileName);
71 void FileInput::Close()
76 if (TEMP_FAILURE_RETRY(close(m_fd)) == -1)
77 Throw(Exception::CloseFailed);
81 LogPedantic("Closed file");
84 BinaryQueueAutoPtr FileInput::Read(size_t size)
86 size_t bytesToRead = size > DEFAULT_READ_BUFFER_SIZE ? DEFAULT_READ_BUFFER_SIZE : size;
88 // Malloc default read buffer size
89 // It is unmanaged, so it can be then attached directly to binary queue
90 void *buffer = malloc(bytesToRead);
93 throw std::bad_alloc();
95 LogPedantic("Trying to read " << bytesToRead << " bytes");
97 ssize_t result = TEMP_FAILURE_RETRY(read(m_fd, buffer, bytesToRead));
99 LogPedantic("Read " << result << " bytes from file");
103 // Succedded to read socket data
104 BinaryQueueAutoPtr binaryQueue(new BinaryQueue());
106 // Append unmanaged memory
107 binaryQueue->AppendUnmanaged(buffer, result, &BinaryQueue::BufferDeleterFree, NULL);
112 else if (result == 0)
114 // Socket was gracefuly closed
117 // Return empty buffer
118 return BinaryQueueAutoPtr(new BinaryQueue());
122 // Must first save errno value, because it may be altered
123 int lastErrno = errno;
128 // Interpret error result
131 // FIXME: Handle specific errno
132 Throw(AbstractInput::Exception::ReadFailed);
136 WaitableHandle FileInput::WaitableReadHandle() const
138 return static_cast<WaitableHandle>(m_fd);