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#include "Select.hpp" |
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#include "../utils/GuiException.hpp" |
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#include <algorithm> |
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Select::Select() : max_fd(-1) { |
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FD_ZERO(&read_fds); |
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} |
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Select::~Select() { |
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while (max_fd >= 0) { |
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removeFd(max_fd); |
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} |
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} |
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void Select::addFd(int fd) { |
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FD_SET(fd, &read_fds); |
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max_fd = std::max(max_fd, fd); |
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} |
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void Select::removeFd(int fd) { |
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FD_CLR(fd, &read_fds); |
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if (fd == max_fd) { |
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while (max_fd >= 0 && !FD_ISSET(max_fd, &read_fds)) { |
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--max_fd; |
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} |
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} |
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} |
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bool Select::isSet(int fd) const { |
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return FD_ISSET(fd, &read_fds); |
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} |
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int Select::select() { |
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fd_set copy_fds = read_fds; |
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struct timeval tv; |
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tv.tv_sec = 0; |
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tv.tv_usec = 0; |
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int ret = ::select(max_fd + 1, ©_fds, nullptr, nullptr, &tv); |
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if (ret == -1) |
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throw guiException("Select::select: select failed"); |
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return ret; |
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} |
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