49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
#pragma once
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// ** Books **
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// http://instructor.sdu.edu.kz/~konst/sysprog2015fall/readings/linux%20system%20programming/The%20Linux%20Programming%20Interface-Michael%20Kerrisk.pdf
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// ** Documentation **
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// http://man7.org/linux/man-pages/man2/read.2.html
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// http://man7.org/linux/man-pages/man2/select.2.html
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// http://man7.org/linux/man-pages/man2/fcntl.2.html
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// ** Community **
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// http://stackoverflow.com/questions/5616092/non-blocking-call-for-reading-descriptor
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// http://stackoverflow.com/questions/2917881/how-to-implement-a-timeout-in-read-function-call
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#include <fcntl.h>
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#include <unistd.h>
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#include "utils/exceptions/not_yet_implemented.hpp"
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#include "utils/exceptions/stacktrace_exception.hpp"
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#include "utils/likely.hpp"
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namespace linux_os {
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class LinuxException : public StacktraceException {
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using StacktraceException::StacktraceException;
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};
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/**
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* Sets non blocking flag to a file descriptor.
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*/
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void set_non_blocking(int fd) {
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auto flags = fcntl(fd, F_GETFL, 0);
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if (UNLIKELY(flags == -1))
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throw LinuxException("Cannot read flags from file descriptor.");
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flags |= O_NONBLOCK;
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auto status = fcntl(fd, F_SETFL, flags);
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if (UNLIKELY(status == -1))
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throw LinuxException("Can't set NON_BLOCK flag to file descriptor");
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}
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/**
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* Reads a file descriptor with timeout.
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*/
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void tread() { throw NotYetImplemented(); }
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}
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