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Diffstat (limited to 'libs/pbd/msvc/msvc_poll.cc')
| -rw-r--r-- | libs/pbd/msvc/msvc_poll.cc | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/libs/pbd/msvc/msvc_poll.cc b/libs/pbd/msvc/msvc_poll.cc deleted file mode 100644 index c18e706084..0000000000 --- a/libs/pbd/msvc/msvc_poll.cc +++ /dev/null @@ -1,215 +0,0 @@ -/* - Copyright (C) 2009 John Emmas - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - -*/ - -#ifdef COMPILER_MSVC - -//#include <glib/gtimer.h> -#include "pbd/msvc_pbd.h" - -#ifndef _DWORD_DEFINED -#define _DWORD_DEFINED -typedef unsigned long DWORD; -#endif // !_DWORD_DEFINED - -/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * - * * - * Note that this entire strategy failed to work, at least for pipes. It turned * - * out that Windows 'tell()' always returns 0 when used on a pipe. This strategy * - * is now deprecated, having been replaced by a new pipe-like object, which I've * - * called 'PBD::pipex'. This polling functionality is included here mostly so * - * that Ardour will build and launch under Windows. However, any module that * - * relies on polling a pipe will eventually need to use the new pipex object. * - * This code will allow it to compile and link successfully, although it won't * - * poll successfully at run time. Having said that, these functions might well * - * work for ports and/or other machanisms that get represented by a file handle. * - * * - * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ - -int poll_input (struct pollfd *fds, nfds_t nfds, int& elapsed_time, int timeout) -{ -DWORD dwOldTickCount, - dwNewTickCount = GetTickCount(); -bool input = false, - error = false; -int ret = 0; - - if (NULL != fds) - { - nfds_t loop; - short ev_mask = (POLLOUT|POLLWRNORM|POLLWRBAND); - - errno = NO_ERROR; - - do - { - dwOldTickCount = dwNewTickCount; - - for (loop=0; loop<nfds; loop++) - fds[loop].revents = 0; - - for (loop=0; (loop<nfds && !error); loop++) - { - if (!(fds[loop].events & ev_mask)) - { - long pos = _tell(fds[loop].fd); - - if (0 > pos) - { - // An error occurred ('errno' should have been set by '_tell()') - ret = (-1); - fds[loop].revents = POLLERR; - if (fds[loop].events & POLLRDNORM) - fds[loop].revents |= POLLRDNORM; - if (fds[loop].events & POLLRDBAND) - fds[loop].revents |= POLLRDBAND; - if (fds[loop].events & POLLPRI) - fds[loop].revents |= POLLPRI; - - // Do we want to abort on error? - if (fds[loop].events & POLLERR) - error = true; - } - else if (pos > 0) - { - // Input characters were found for this fd - ret += 1; - if (fds[loop].events & POLLRDNORM) - fds[loop].revents |= POLLRDNORM; - if (fds[loop].events & POLLRDBAND) - fds[loop].revents |= POLLRDBAND; - if (fds[loop].events & POLLPRI) - fds[loop].revents |= POLLPRI; - - // Do we want to abort on input? - if ((fds[loop].events & POLLIN) || - (fds[loop].events & POLLPRI) || - (fds[loop].events & POLLRDNORM) || - (fds[loop].events & POLLRDBAND)) - input = true; - } - } - } - - if (input) - break; - - dwNewTickCount = GetTickCount(); - elapsed_time += (dwNewTickCount-dwOldTickCount); - // Note that the above will wrap round if the user leaves - // his computer powered up for more than about 50 days! - - // Sleep briefly because GetTickCount() only has an accuracy of 10mS - Sleep(10); // For some reason 'g_usleep()' craps over everything here. Different 'C' runtimes??? - - } while ((!error) && ((timeout == (-1)) || (elapsed_time < timeout))); - } - else - { - errno = ERROR_BAD_ARGUMENTS; - ret = (-1); - } - - return (ret); -} - -int poll_output (struct pollfd *fds, nfds_t nfds, int& elapsed_time, int timeout) -{ -int ret = 0; // This functionality is not yet implemented - - if (NULL != fds) - { - // Just flag whichever pollfd was specified for writing - short ev_mask = (POLLOUT|POLLWRNORM|POLLWRBAND); - - errno = NO_ERROR; - elapsed_time = 0; - - for (nfds_t loop=0; loop<nfds; loop++) - { - if (fds[loop].events & ev_mask) - { - fds[loop].revents = POLLNVAL; - errno = ERROR_INVALID_ACCESS; - ret = (-1); - } - } - } - else - { - errno = ERROR_BAD_ARGUMENTS; - ret = (-1); - } - - return (ret); -} - -//*************************************************************** -// -// poll() -// -// Emulates POSIX poll() using Win32 _tell(). -// -// Returns: -// -// On Success: A positive integer indicating the total number -// of file descriptors that were available for -// writing or had data available for reading. -// On Failure: -1 (the actual error is saved in 'errno'). -// -LIBPBD_API int PBD_APICALLTYPE -poll (struct pollfd *fds, nfds_t nfds, int timeout) -{ -int elapsed_time = 0; -int ret = (-1); - - // Note that this functionality is not fully implemented. - // At the time of writing, Ardour seems only to poll on - // read pipes. Therefore return an error if any write - // pipe seems to have been specified or if too many file - // descriptors were passed. - short ev_mask = (POLLOUT|POLLWRNORM|POLLWRBAND); - - if ((nfds > OPEN_MAX) || (nfds > NPOLLFILE)) - { - errno = ERROR_TOO_MANY_OPEN_FILES; - } - else - { - ret = 0; - - for (nfds_t loop=0; loop<nfds; loop++) - { - if (fds[loop].events & ev_mask) - { - ret = poll_output(fds, nfds, elapsed_time, timeout); - break; - } - } - - if (0 == ret) - { - // Poll for input - ret = poll_input(fds, nfds, elapsed_time, timeout); - } - } - - return (ret); -} - -#endif //COMPILER_MSVC |