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juce_ChildProcess.cpp
1/*
2 ==============================================================================
3
4 This file is part of the JUCE library.
5 Copyright (c) 2017 - ROLI Ltd.
6
7 JUCE is an open source library subject to commercial or open-source
8 licensing.
9
10 The code included in this file is provided under the terms of the ISC license
11 http://www.isc.org/downloads/software-support-policy/isc-license. Permission
12 To use, copy, modify, and/or distribute this software for any purpose with or
13 without fee is hereby granted provided that the above copyright notice and
14 this permission notice appear in all copies.
15
16 JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
17 EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
18 DISCLAIMED.
19
20 ==============================================================================
21*/
22
23 namespace juce
24{
25
26 ChildProcess::ChildProcess() {}
27 ChildProcess::~ChildProcess() {}
28
29 bool ChildProcess::isRunning() const
30{
31 return activeProcess != nullptr && activeProcess->isRunning();
32}
33
34 int ChildProcess::readProcessOutput (void* dest, int numBytes)
35{
36 return activeProcess != nullptr ? activeProcess->read (dest, numBytes) : 0;
37}
38
39 bool ChildProcess::kill()
40{
41 return activeProcess == nullptr || activeProcess->killProcess();
42}
43
44uint32 ChildProcess::getExitCode() const
45{
46 return activeProcess != nullptr ? activeProcess->getExitCode() : 0;
47}
48
49 bool ChildProcess::waitForProcessToFinish (const int timeoutMs) const
50{
51 auto timeoutTime = Time::getMillisecondCounter() + (uint32) timeoutMs;
52
53 do
54 {
55 if (! isRunning())
56 return true;
57
58 Thread::sleep (2);
59 }
60 while (timeoutMs < 0 || Time::getMillisecondCounter() < timeoutTime);
61
62 return false;
63}
64
65 String ChildProcess::readAllProcessOutput()
66{
67 MemoryOutputStream result;
68
69 for (;;)
70 {
71 char buffer[512];
72 auto num = readProcessOutput (buffer, sizeof (buffer));
73
74 if (num <= 0)
75 break;
76
77 result.write (buffer, (size_t) num);
78 }
79
80 return result.toString();
81}
82
83
84//==============================================================================
85//==============================================================================
86#if JUCE_UNIT_TESTS
87
88 class ChildProcessTests : public UnitTest
89{
90 public:
91 ChildProcessTests()
92 : UnitTest ("ChildProcess", UnitTestCategories::threads)
93 {}
94
95 void runTest() override
96 {
97 beginTest ("Child Processes");
98
99 #if JUCE_WINDOWS || JUCE_MAC || JUCE_LINUX
100 ChildProcess p;
101
102 #if JUCE_WINDOWS
103 expect (p.start ("tasklist"));
104 #else
105 expect (p.start ("ls /"));
106 #endif
107
108 auto output = p.readAllProcessOutput();
109 expect (output.isNotEmpty());
110 #endif
111 }
112};
113
114 static ChildProcessTests childProcessUnitTests;
115
116#endif
117
118} // namespace juce
juce::ChildProcess::getExitCode
uint32 getExitCode() const
Definition: juce_ChildProcess.cpp:44
juce::ChildProcess::readAllProcessOutput
String readAllProcessOutput()
Definition: juce_ChildProcess.cpp:65
juce::ChildProcess::readProcessOutput
int readProcessOutput(void *destBuffer, int numBytesToRead)
Definition: juce_ChildProcess.cpp:34
juce::ChildProcess::~ChildProcess
~ChildProcess()
Definition: juce_ChildProcess.cpp:27
juce::ChildProcess::isRunning
bool isRunning() const
Definition: juce_ChildProcess.cpp:29
juce::ChildProcess::waitForProcessToFinish
bool waitForProcessToFinish(int timeoutMs) const
Definition: juce_ChildProcess.cpp:49
juce::ChildProcess::kill
bool kill()
Definition: juce_ChildProcess.cpp:39
juce::ChildProcess::ChildProcess
ChildProcess()
Definition: juce_ChildProcess.cpp:26
juce::MemoryOutputStream
Definition: juce_MemoryOutputStream.h:36
juce::MemoryOutputStream::toString
String toString() const
Definition: juce_MemoryOutputStream.cpp:195
juce::MemoryOutputStream::write
bool write(const void *, size_t) override
Definition: juce_MemoryOutputStream.cpp:102
juce::String
Definition: juce_String.h:39
juce::Thread::sleep
static void JUCE_CALLTYPE sleep(int milliseconds)
juce::Time::getMillisecondCounter
static uint32 getMillisecondCounter() noexcept
Definition: juce_Time.cpp:226
juce::UnitTest
Definition: juce_UnitTest.h:70