peri4
8a5e72c723
new PIIODevice::interrupt() virtual method new PIWaitEvent private class PIEthernet and PISerial basically tested on Windows and Linux
127 lines
2.8 KiB
C++
127 lines
2.8 KiB
C++
/*
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PIP - Platform Independent Primitives
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Private PIP wait object
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Ivan Pelipenko peri4ko@yandex.ru
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "piwaitevent_p.h"
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#ifdef WINDOWS
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//# ifdef _WIN32_WINNT
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//# undef _WIN32_WINNT
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//# define _WIN32_WINNT 0x0600
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//# endif
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# include <synchapi.h>
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#else
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# include <fcntl.h>
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# include <sys/ioctl.h>
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#endif
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#include "piincludes_p.h"
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#include "pistring.h"
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PIWaitEvent::~PIWaitEvent() {
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destroy();
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}
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void PIWaitEvent::create() {
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destroy();
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#ifdef WINDOWS
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event = CreateEventA(NULL, TRUE, FALSE, NULL);
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if (!event) {
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piCout << "Error with CreateEventA:" << errorString();
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}
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#else
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for (int i = 0; i < 3; ++i) memset(&(fds[i]), 0, sizeof(fds[i]));
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if (::pipe(pipe_fd) < 0) {
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piCout << "Error with pipe:" << errorString();
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} else {
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fcntl(pipe_fd[ReadEnd], F_SETFL, O_NONBLOCK);
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}
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#endif
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}
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void PIWaitEvent::destroy() {
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#ifdef WINDOWS
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if (event) {
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CloseHandle(event);
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event = NULL;
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}
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#else
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for (int i = 0; i < 2; ++i) {
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if (pipe_fd[i] != 0) {
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::close(pipe_fd[i]);
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pipe_fd[i] = 0;
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}
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}
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#endif
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}
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#ifdef WINDOWS
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bool PIWaitEvent::wait() {
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#else
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bool PIWaitEvent::wait(int fd, PIWaitEvent::SelectRole role) {
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#endif
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if (!isCreate()) return false;
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#ifdef WINDOWS
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DWORD ret = WaitForSingleObjectEx(event, INFINITE, TRUE);
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ResetEvent(event);
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if (ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED) return false;
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#else
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int nfds = piMaxi(pipe_fd[ReadEnd], fd) + 1;
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int fd_index = 0;
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switch (role) {
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case CheckRead:
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fd_index = 0;
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break;
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case CheckWrite:
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fd_index = 1;
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break;
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}
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for (int i = 0; i < 3; ++i) FD_ZERO(&(fds[i]));
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FD_SET(pipe_fd[ReadEnd], &(fds[0]));
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FD_SET(fd, &(fds[2]));
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FD_SET(fd, &(fds[fd_index]));
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::select(nfds, &(fds[0]), &(fds[1]), &(fds[2]), nullptr);
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int buf = 0;
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while (::read(pipe_fd[ReadEnd], &buf, sizeof(buf)) > 0);
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if (FD_ISSET(fd, &(fds[2]))) return false;
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return FD_ISSET(fd, &(fds[fd_index]));
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#endif
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return true;
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}
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void PIWaitEvent::interrupt() {
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if (!isCreate()) return;
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#ifdef WINDOWS
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SetEvent(event);
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#else
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::write(pipe_fd[WriteEnd], "", 1);
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#endif
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}
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bool PIWaitEvent::isCreate() const {
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#ifdef WINDOWS
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return event;
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#else
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return pipe_fd[ReadEnd] != 0;
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#endif
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}
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