diff options
Diffstat (limited to 'src/libs/3rdparty/winpty/src/unix-adapter/WakeupFd.cc')
-rw-r--r-- | src/libs/3rdparty/winpty/src/unix-adapter/WakeupFd.cc | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/src/libs/3rdparty/winpty/src/unix-adapter/WakeupFd.cc b/src/libs/3rdparty/winpty/src/unix-adapter/WakeupFd.cc new file mode 100644 index 0000000000..6b47379015 --- /dev/null +++ b/src/libs/3rdparty/winpty/src/unix-adapter/WakeupFd.cc @@ -0,0 +1,70 @@ +// 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 "WakeupFd.h" + +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + +static void setFdNonBlock(int fd) { + int status = fcntl(fd, F_GETFL); + fcntl(fd, F_SETFL, status | O_NONBLOCK); +} + +WakeupFd::WakeupFd() { + int pipeFd[2]; + if (pipe(pipeFd) != 0) { + perror("Could not create internal wakeup pipe"); + abort(); + } + m_pipeReadFd = pipeFd[0]; + m_pipeWriteFd = pipeFd[1]; + setFdNonBlock(m_pipeReadFd); + setFdNonBlock(m_pipeWriteFd); +} + +WakeupFd::~WakeupFd() { + close(m_pipeReadFd); + close(m_pipeWriteFd); +} + +void WakeupFd::set() { + char dummy = 0; + int ret; + do { + ret = write(m_pipeWriteFd, &dummy, 1); + } while (ret < 0 && errno == EINTR); +} + +void WakeupFd::reset() { + char tmpBuf[256]; + while (true) { + int amount = read(m_pipeReadFd, tmpBuf, sizeof(tmpBuf)); + if (amount < 0 && errno == EAGAIN) { + break; + } else if (amount <= 0) { + perror("error reading from internal wakeup pipe"); + abort(); + } + } +} |