1 | // |
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2 | // PipeImpl_POSIX.cpp |
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3 | // |
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4 | // $Id: //poco/1.3/Foundation/src/PipeImpl_POSIX.cpp#2 $ |
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5 | // |
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6 | // Library: Foundation |
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7 | // Package: Processes |
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8 | // Module: PipeImpl |
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9 | // |
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10 | // Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH. |
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11 | // and Contributors. |
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12 | // |
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13 | // Permission is hereby granted, free of charge, to any person or organization |
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14 | // obtaining a copy of the software and accompanying documentation covered by |
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15 | // this license (the "Software") to use, reproduce, display, distribute, |
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16 | // execute, and transmit the Software, and to prepare derivative works of the |
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17 | // Software, and to permit third-parties to whom the Software is furnished to |
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18 | // do so, all subject to the following: |
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19 | // |
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20 | // The copyright notices in the Software and this entire statement, including |
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21 | // the above license grant, this restriction and the following disclaimer, |
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22 | // must be included in all copies of the Software, in whole or in part, and |
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23 | // all derivative works of the Software, unless such copies or derivative |
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24 | // works are solely in the form of machine-executable object code generated by |
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25 | // a source language processor. |
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26 | // |
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27 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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28 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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29 | // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT |
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30 | // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE |
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31 | // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, |
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32 | // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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33 | // DEALINGS IN THE SOFTWARE. |
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34 | // |
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35 | |
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36 | |
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37 | #include "Poco/PipeImpl_POSIX.h" |
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38 | #include "Poco/Exception.h" |
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39 | #include <sys/types.h> |
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40 | #include <unistd.h> |
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41 | #include <errno.h> |
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42 | |
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43 | |
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44 | namespace Poco { |
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45 | |
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46 | |
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47 | PipeImpl::PipeImpl() |
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48 | { |
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49 | int fds[2]; |
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50 | int rc = pipe(fds); |
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51 | if (rc == 0) |
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52 | { |
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53 | _readfd = fds[0]; |
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54 | _writefd = fds[1]; |
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55 | } |
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56 | else throw CreateFileException("anonymous pipe"); |
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57 | } |
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58 | |
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59 | |
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60 | PipeImpl::~PipeImpl() |
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61 | { |
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62 | closeRead(); |
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63 | closeWrite(); |
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64 | } |
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65 | |
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66 | |
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67 | int PipeImpl::writeBytes(const void* buffer, int length) |
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68 | { |
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69 | poco_assert (_writefd != -1); |
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70 | |
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71 | int n; |
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72 | do |
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73 | { |
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74 | n = write(_writefd, buffer, length); |
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75 | } |
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76 | while (n < 0 && errno == EINTR); |
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77 | if (n >= 0) |
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78 | return n; |
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79 | else |
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80 | throw WriteFileException("anonymous pipe"); |
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81 | } |
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82 | |
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83 | |
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84 | int PipeImpl::readBytes(void* buffer, int length) |
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85 | { |
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86 | poco_assert (_readfd != -1); |
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87 | |
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88 | int n; |
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89 | do |
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90 | { |
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91 | n = read(_readfd, buffer, length); |
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92 | } |
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93 | while (n < 0 && errno == EINTR); |
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94 | if (n >= 0) |
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95 | return n; |
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96 | else |
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97 | throw ReadFileException("anonymous pipe"); |
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98 | } |
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99 | |
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100 | |
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101 | PipeImpl::Handle PipeImpl::readHandle() const |
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102 | { |
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103 | return _readfd; |
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104 | } |
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105 | |
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106 | |
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107 | PipeImpl::Handle PipeImpl::writeHandle() const |
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108 | { |
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109 | return _writefd; |
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110 | } |
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111 | |
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112 | |
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113 | void PipeImpl::closeRead() |
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114 | { |
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115 | if (_readfd != -1) |
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116 | { |
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117 | close(_readfd); |
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118 | _readfd = -1; |
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119 | } |
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120 | } |
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121 | |
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122 | |
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123 | void PipeImpl::closeWrite() |
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124 | { |
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125 | if (_writefd != -1) |
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126 | { |
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127 | close(_writefd); |
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128 | _writefd = -1; |
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129 | } |
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130 | } |
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131 | |
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132 | |
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133 | } // namespace Poco |
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