1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
// Copyright (c) 2011-2015 Ryan Prichard
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
#include "InputHandler.h"
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <sys/select.h>
#include <unistd.h>
#include <algorithm>
#include <vector>
#include "../shared/DebugClient.h"
#include "Util.h"
#include "WakeupFd.h"
InputHandler::InputHandler(
HANDLE conin, int inputfd, WakeupFd &completionWakeup) :
m_conin(conin),
m_inputfd(inputfd),
m_completionWakeup(completionWakeup),
m_threadHasBeenJoined(false),
m_shouldShutdown(0),
m_threadCompleted(0)
{
pthread_create(&m_thread, NULL, InputHandler::threadProcS, this);
}
void InputHandler::shutdown() {
startShutdown();
if (!m_threadHasBeenJoined) {
int ret = pthread_join(m_thread, NULL);
assert(ret == 0 && "pthread_join failed");
m_threadHasBeenJoined = true;
}
}
void InputHandler::threadProc() {
std::vector<char> buffer(4096);
fd_set readfds;
FD_ZERO(&readfds);
while (true) {
// Handle shutdown.
m_wakeup.reset();
if (m_shouldShutdown) {
trace("InputHandler: shutting down");
break;
}
// Block until data arrives.
{
const int max_fd = std::max(m_inputfd, m_wakeup.fd());
FD_SET(m_inputfd, &readfds);
FD_SET(m_wakeup.fd(), &readfds);
selectWrapper("InputHandler", max_fd + 1, &readfds);
if (!FD_ISSET(m_inputfd, &readfds)) {
continue;
}
}
const int numRead = read(m_inputfd, &buffer[0], buffer.size());
if (numRead == -1 && errno == EINTR) {
// Apparently, this read is interrupted on Cygwin 1.7 by a SIGWINCH
// signal even though I set the SA_RESTART flag on the handler.
continue;
}
// tty is closed, or the read failed for some unexpected reason.
if (numRead <= 0) {
trace("InputHandler: tty read failed: numRead=%d", numRead);
break;
}
DWORD written = 0;
BOOL ret = WriteFile(m_conin,
&buffer[0], numRead,
&written, NULL);
if (!ret || written != static_cast<DWORD>(numRead)) {
if (!ret && GetLastError() == ERROR_BROKEN_PIPE) {
trace("InputHandler: pipe closed: written=%u",
static_cast<unsigned int>(written));
} else {
trace("InputHandler: write failed: "
"ret=%d lastError=0x%x numRead=%d written=%u",
ret,
static_cast<unsigned int>(GetLastError()),
numRead,
static_cast<unsigned int>(written));
}
break;
}
}
m_threadCompleted = 1;
m_completionWakeup.set();
}
|
