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Diffstat (limited to 'solenv/unxmacxp/inc/poll.h')
| -rw-r--r-- | solenv/unxmacxp/inc/poll.h | 176 |
1 files changed, 0 insertions, 176 deletions
diff --git a/solenv/unxmacxp/inc/poll.h b/solenv/unxmacxp/inc/poll.h deleted file mode 100644 index 78dd8f9ba..000000000 --- a/solenv/unxmacxp/inc/poll.h +++ /dev/null @@ -1,176 +0,0 @@ -/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ -// poll.h -// MacOS X does not implement poll(). Therefore, this replacement -// is required. It uses select(). - -#ifndef _FAKE_POLL_H -#define _FAKE_POLL_H - -#include <sys/errno.h> -#include <string.h> -#include <limits.h> -#undef FD_SETSIZE -#define FD_SETSIZE OPEN_MAX -#include <sys/types.h> -#include <sys/time.h> -#include <unistd.h> -#include <stdlib.h> - -typedef struct pollfd { - int fd; /* file desc to poll */ - short events; /* events of interest on fd */ - short revents; /* events that occurred on fd */ -} pollfd_t; - - -// poll flags -#define POLLIN 0x0001 -#define POLLOUT 0x0004 -#define POLLERR 0x0008 - -// synonyms -#define POLLNORM POLLIN -#define POLLPRI POLLIN -#define POLLRDNORM POLLIN -#define POLLRDBAND POLLIN -#define POLLWRNORM POLLOUT -#define POLLWRBAND POLLOUT - -// ignored -#define POLLHUP 0x0010 -#define POLLNVAL 0x0020 - -inline int poll(struct pollfd *pollSet, int pollCount, int pollTimeout) -{ - struct timeval tv; - struct timeval *tvp; - fd_set readFDs, writeFDs, exceptFDs; - fd_set *readp, *writep, *exceptp; - struct pollfd *pollEnd, *p; - int selected; - int result; - int maxFD; - - if ( !pollSet ) - { - pollEnd = NULL; - readp = NULL; - writep = NULL; - exceptp = NULL; - maxFD = 0; - } - else - { - pollEnd = pollSet + pollCount; - readp = &readFDs; - writep = &writeFDs; - exceptp = &exceptFDs; - - FD_ZERO(readp); - FD_ZERO(writep); - FD_ZERO(exceptp); - - // Find the biggest fd in the poll set - maxFD = 0; - for (p = pollSet; p < pollEnd; p++) - { - if (p->fd > maxFD) - maxFD = p->fd; - } - - if (maxFD >= FD_SETSIZE) - { - // At least one fd is too big - errno = EINVAL; - return -1; - } - - // Transcribe flags from the poll set to the fd sets - for (p = pollSet; p < pollEnd; p++) - { - if (p->fd < 0) - { - // Negative fd checks nothing and always reports zero - } - else - { - if (p->events & POLLIN) - FD_SET(p->fd, readp); - if (p->events & POLLOUT) - FD_SET(p->fd, writep); - if (p->events != 0) - FD_SET(p->fd, exceptp); - // POLLERR is never set coming in; poll() always reports errors - // But don't report if we're not listening to anything at all. - } - } - } - - // poll timeout is in milliseconds. Convert to struct timeval. - // poll timeout == -1 : wait forever : select timeout of NULL - // poll timeout == 0 : return immediately : select timeout of zero - if (pollTimeout >= 0) - { - tv.tv_sec = pollTimeout / 1000; - tv.tv_usec = (pollTimeout % 1000) * 1000; - tvp = &tv; - } - else - { - tvp = NULL; - } - - selected = select(maxFD+1, readp, writep, exceptp, tvp); - - if (selected < 0) - { - // Error during select - result = -1; - } - else if (selected > 0) - { - // Select found something - // Transcribe result from fd sets to poll set. - // Also count the number of selected fds. poll returns the - // number of ready fds; select returns the number of bits set. - int polled = 0; - for (p = pollSet; p < pollEnd; p++) - { - p->revents = 0; - if (p->fd < 0) { - // Negative fd always reports zero - } - else - { - if ( (p->events & POLLIN) && FD_ISSET(p->fd, readp) ) - p->revents |= POLLIN; - if ( (p->events & POLLOUT) && FD_ISSET(p->fd, writep) ) - p->revents |= POLLOUT; - if ( (p->events != 0) && FD_ISSET(p->fd, exceptp) ) - p->revents |= POLLERR; - - if (p->revents) - polled++; - } - } - result = polled; - } - else - { - // selected == 0, select timed out before anything happened - // Clear all result bits and return zero. - for (p = pollSet; p < pollEnd; p++) - p->revents = 0; - - result = 0; - } - - return result; -} - - -#undef FD_SETSIZE - -#endif - -/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |