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-rw-r--r--winsup/cygwin/select.cc1380
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diff --git a/winsup/cygwin/select.cc b/winsup/cygwin/select.cc
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+/* select.cc
+
+ Copyright 1996, 1997, 1998, 1999, 2000 Cygnus Solutions.
+
+ Written by Christopher Faylor of Cygnus Solutions
+ cgf@cygnus.com
+
+This file is part of Cygwin.
+
+This software is a copyrighted work licensed under the terms of the
+Cygwin license. Please consult the file "CYGWIN_LICENSE" for
+details. */
+
+/*
+ * The following line means that the BSD socket
+ * definitions for fd_set, FD_ISSET etc. are used in this
+ * file.
+ */
+
+#define __INSIDE_CYGWIN_NET__
+#define Win32_Winsock
+
+#include <errno.h>
+#include <sys/socket.h>
+#include <stdlib.h>
+#include <sys/time.h>
+
+#include "winsup.h"
+#include <netdb.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <winsock.h>
+#include "select.h"
+
+/*
+ * All these defines below should be in sys/types.h
+ * but because of the includes above, they may not have
+ * been included. We create special UNIX_xxxx versions here.
+ */
+
+#ifndef NBBY
+#define NBBY 8 /* number of bits in a byte */
+#endif /* NBBY */
+
+/*
+ * Select uses bit masks of file descriptors in longs.
+ * These macros manipulate such bit fields (the filesystem macros use chars).
+ * FD_SETSIZE may be defined by the user, but the default here
+ * should be >= NOFILE (param.h).
+ */
+
+typedef long fd_mask;
+#define UNIX_NFDBITS (sizeof (fd_mask) * NBBY) /* bits per mask */
+#ifndef unix_howmany
+#define unix_howmany(x,y) (((x)+((y)-1))/(y))
+#endif
+
+#define unix_fd_set fd_set
+
+#define NULL_fd_set ((fd_set *)NULL)
+#define sizeof_fd_set(n) \
+ ((unsigned) (NULL_fd_set->fds_bits + unix_howmany((n), UNIX_NFDBITS)))
+#define UNIX_FD_SET(n, p) \
+ ((p)->fds_bits[(n)/UNIX_NFDBITS] |= (1L << ((n) % UNIX_NFDBITS)))
+#define UNIX_FD_CLR(n, p) \
+ ((p)->fds_bits[(n)/UNIX_NFDBITS] &= ~(1L << ((n) % UNIX_NFDBITS)))
+#define UNIX_FD_ISSET(n, p) \
+ ((p)->fds_bits[(n)/UNIX_NFDBITS] & (1L << ((n) % UNIX_NFDBITS)))
+#define UNIX_FD_ZERO(p, n) \
+ bzero ((caddr_t)(p), sizeof_fd_set ((n)))
+
+#define allocfd_set(n) ((fd_set *) alloca (sizeof_fd_set (n)))
+#define copyfd_set(to, from, n) memcpy (to, from, sizeof_fd_set (n));
+
+/* Make a fhandler_foo::ready_for_ready method.
+ Assumption: The "ready_for_read" methods are called with one level of
+ signal blocking. */
+#define MAKEready(what) \
+int \
+fhandler_##what::ready_for_read (int fd, DWORD howlong, int ignra) \
+{ \
+ select_record me (this); \
+ me.fd = fd; \
+ (void) select_read (&me); \
+ while (!peek_##what (&me, ignra) && howlong == INFINITE) \
+ if (fd >= 0 && dtable.not_open (fd)) \
+ break; \
+ else if (WaitForSingleObject (signal_arrived, 10) == WAIT_OBJECT_0) \
+ break; \
+ return me.read_ready; \
+}
+
+#define set_handle_or_return_if_not_open(h, s) \
+ h = (s)->fh->get_handle (); \
+ if (dtable.not_open ((s)->fd)) \
+ { \
+ (s)->saw_error = TRUE; \
+ set_errno (EBADF); \
+ return -1; \
+ } \
+
+/* The main select code.
+ */
+extern "C"
+int
+cygwin_select (int n, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
+ struct timeval *to)
+{
+ select_stuff sel;
+ fd_set *dummy_readfds = allocfd_set (n);
+ fd_set *dummy_writefds = allocfd_set (n);
+ fd_set *dummy_exceptfds = allocfd_set (n);
+
+#if 0
+ if (n > FD_SETSIZE)
+ {
+ set_errno (EINVAL);
+ return -1;
+ }
+#endif
+
+ select_printf ("%d, %p, %p, %p, %p", n, readfds, writefds, exceptfds, to);
+
+ memset (&sel, 0, sizeof (sel));
+ if (!readfds)
+ {
+ UNIX_FD_ZERO (dummy_readfds, n);
+ readfds = dummy_readfds;
+ }
+ if (!writefds)
+ {
+ UNIX_FD_ZERO (dummy_writefds, n);
+ writefds = dummy_writefds;
+ }
+ if (!exceptfds)
+ {
+ UNIX_FD_ZERO (dummy_exceptfds, n);
+ exceptfds = dummy_exceptfds;
+ }
+
+ for (int i = 0; i < n; i++)
+ if (!sel.test_and_set (i, readfds, writefds, exceptfds))
+ {
+ select_printf ("aborting due to test_and_set error");
+ return -1; /* Invalid fd, maybe? */
+ }
+
+ /* Convert to milliseconds or INFINITE if to == NULL */
+ DWORD ms = to ? (to->tv_sec * 1000) + (to->tv_usec / 1000) : INFINITE;
+ if (ms == 0 && to->tv_usec)
+ ms = 1; /* At least 1 ms granularity */
+
+ if (to)
+ select_printf ("to->tv_sec %d, to->tv_usec %d, ms %d", to->tv_sec, to->tv_usec, ms);
+ else
+ select_printf ("to NULL, ms %x", ms);
+
+ select_printf ("sel.total %d, sel.always_ready %d", sel.total, sel.always_ready);
+
+ /* Degenerate case. No fds to wait for. Just wait. */
+ if (sel.total == 0)
+ {
+ if (WaitForSingleObject (signal_arrived, ms) == WAIT_OBJECT_0)
+ {
+ select_printf ("signal received");
+ set_sig_errno (EINTR);
+ return -1;
+ }
+ return 0;
+ }
+
+ /* If one of the selected fds is "always ready" just poll everything and return
+ the result. There is no need to wait. */
+ if (sel.always_ready || ms == 0)
+ {
+ UNIX_FD_ZERO (readfds, n);
+ UNIX_FD_ZERO (writefds, n);
+ UNIX_FD_ZERO (exceptfds, n);
+ return sel.poll (readfds, writefds, exceptfds);
+ }
+
+ /* Wait for an fd to come alive */
+ return sel.wait (readfds, writefds, exceptfds, ms);
+}
+
+/* Cleanup */
+select_stuff::~select_stuff ()
+{
+ select_record *s = &start;
+
+ select_printf ("calling cleanup routines");
+ while ((s = s->next))
+ if (s->cleanup)
+ s->cleanup (s, this);
+
+ select_record *snext = start.next;
+
+ select_printf ("deleting select records");
+ while ((s = snext))
+ {
+ snext = s->next;
+ delete s;
+ }
+}
+
+/* Add a record to the select chain */
+int
+select_stuff::test_and_set (int i, fd_set *readfds, fd_set *writefds,
+ fd_set *exceptfds)
+{
+ select_record *s = NULL;
+ if (UNIX_FD_ISSET (i, readfds) && (s = dtable.select_read (i, s)) == NULL)
+ return 0; /* error */
+ if (UNIX_FD_ISSET (i, writefds) && (s = dtable.select_write (i, s)) == NULL)
+ return 0; /* error */
+ if (UNIX_FD_ISSET (i, exceptfds) && (s = dtable.select_except (i, s)) == NULL)
+ return 0; /* error */
+ if (s == NULL)
+ return 1; /* nothing to do */
+
+ if (s->read_ready || s->write_ready || s->except_ready)
+ always_ready = TRUE;
+
+ if (s->windows_handle || s->windows_handle || s->windows_handle)
+ windows_used = TRUE;
+
+ s->next = start.next;
+ start.next = s;
+ total++;
+ return 1;
+}
+
+/* Poll every fd in the select chain. Set appropriate fd in mask. */
+int
+select_stuff::poll (fd_set *readfds, fd_set *writefds, fd_set *exceptfds)
+{
+ int n = 0;
+ select_record *s = &start;
+ while ((s = s->next))
+ n += s->poll (s, readfds, writefds, exceptfds);
+ select_printf ("returning %d", n);
+ return n;
+}
+
+/* The heart of select. Waits for an fd to do something interesting. */
+int
+select_stuff::wait (fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
+ DWORD ms)
+{
+ int wait_ret;
+ HANDLE w4[total + 1];
+ select_record *s = &start;
+ int m = 0;
+
+ w4[m++] = signal_arrived; /* Always wait for the arrival of a signal. */
+ /* Loop through the select chain, starting up anything appropriate and
+ counting the number of active fds. */
+ while ((s = s->next))
+ {
+ if (!s->startup (s, this))
+ {
+ __seterrno ();
+ return -1;
+ }
+ if (s->h == NULL)
+ continue;
+ for (int i = 1; i < m; i++)
+ if (w4[i] == s->h)
+ goto next_while;
+ w4[m++] = s->h;
+ next_while:
+ continue;
+ }
+
+ int n = m - 1;
+ DWORD start_time = GetTickCount (); /* Record the current time for later use. */
+
+ /* Allocate some fd_set structures using the number of fds as a guide. */
+ fd_set *r = allocfd_set (n);
+ fd_set *w = allocfd_set (n);
+ fd_set *e = allocfd_set (n);
+ UNIX_FD_ZERO (r, n);
+ UNIX_FD_ZERO (w, n);
+ UNIX_FD_ZERO (e, n);
+ debug_printf ("n %d, ms %u", n, ms);
+ for (;;)
+ {
+ if (!windows_used)
+ wait_ret = WaitForMultipleObjects (m, w4, FALSE, ms);
+ else
+ wait_ret = MsgWaitForMultipleObjects (m, w4, FALSE, ms, QS_ALLINPUT);
+
+ switch (wait_ret)
+ {
+ case WAIT_OBJECT_0:
+ select_printf ("signal received");
+ set_sig_errno (EINTR);
+ return -1;
+ case WAIT_FAILED:
+ select_printf ("WaitForMultipleObjects failed");
+ __seterrno ();
+ return -1;
+ case WAIT_TIMEOUT:
+ select_printf ("timed out");
+ goto out;
+ }
+
+ select_printf ("woke up. wait_ret %d. verifying", wait_ret);
+ s = &start;
+ int gotone = FALSE;
+ while ((s = s->next))
+ if (s->saw_error)
+ return -1; /* Somebody detected an error */
+ else if ((((wait_ret >= m && s->windows_handle) || s->h == w4[wait_ret])) &&
+ s->verify (s, r, w, e))
+ gotone = TRUE;
+
+ select_printf ("gotone %d", gotone);
+ if (gotone)
+ goto out;
+
+ if (ms == INFINITE)
+ {
+ select_printf ("looping");
+ continue;
+ }
+ select_printf ("recalculating ms");
+
+ DWORD now = GetTickCount ();
+ if (now > (start_time + ms))
+ {
+ select_printf ("timed out after verification");
+ goto out;
+ }
+ ms -= (now - start_time);
+ start_time = now;
+ select_printf ("ms now %u", ms);
+ }
+
+out:
+ copyfd_set (readfds, r, n);
+ copyfd_set (writefds, w, n);
+ copyfd_set (exceptfds, e, n);
+
+ return poll (readfds, writefds, exceptfds);
+}
+
+static int
+set_bits (select_record *me, fd_set *readfds, fd_set *writefds,
+ fd_set *exceptfds)
+{
+ int ready = 0;
+ select_printf ("me %p, testing fd %d (%s)", me, me->fd, me->fh->get_name ());
+ if (me->read_selected && me->read_ready)
+ {
+ UNIX_FD_SET (me->fd, readfds);
+ ready++;
+ }
+ if (me->write_selected && me->write_ready)
+ {
+ UNIX_FD_SET (me->fd, writefds);
+ ready++;
+ }
+ if (me->except_ready && me->except_ready)
+ {
+ UNIX_FD_SET (me->fd, exceptfds);
+ ready++;
+ }
+ select_printf ("ready %d", ready);
+ return ready;
+}
+
+static int
+verify_true (select_record *me, fd_set *readfds, fd_set *writefds,
+ fd_set *exceptfds)
+{
+ return 1;
+}
+
+static int
+verify_ok (select_record *me, fd_set *readfds, fd_set *writefds,
+ fd_set *exceptfds)
+{
+ return set_bits (me, readfds, writefds, exceptfds);
+}
+
+static int
+no_startup (select_record *me, select_stuff *stuff)
+{
+ return 1;
+}
+
+static int
+no_verify (select_record *, fd_set *, fd_set *, fd_set *)
+{
+ return 0;
+}
+
+static int
+peek_pipe (select_record *s, int ignra)
+{
+ int n = 0;
+ int gotone = 0;
+ fhandler_base *fh = s->fh;
+
+ HANDLE h;
+ set_handle_or_return_if_not_open (h, s);
+
+ /* Don't perform complicated tests if we don't need to. */
+ if (!s->read_selected && !s->except_selected)
+ goto out;
+
+ if (s->read_selected && fh->bg_check (SIGTTIN) <= 0)
+ {
+ gotone = s->read_ready = 1;
+ goto out;
+ }
+
+ if (!ignra && fh->get_readahead_valid ())
+ {
+ select_printf ("readahead");
+ gotone = s->read_ready = 1;
+ goto out;
+ }
+
+ else if (!PeekNamedPipe (h, NULL, 0, NULL, (DWORD *) &n, NULL))
+ {
+ select_printf ("%s, PeekNamedPipe failed, %E", fh->get_name ());
+ n = -1;
+ }
+
+ if (n < 0)
+ {
+ select_printf ("%s, n %d", fh->get_name (), n);
+ if (s->except_selected)
+ gotone += s->except_ready = TRUE;
+ if (s->read_selected)
+ gotone += s->read_ready = TRUE;
+ }
+ if (n > 0 && s->read_selected)
+ {
+ select_printf ("%s, ready for read", fh->get_name ());
+ gotone += s->read_ready = TRUE;
+ }
+ if (!gotone && s->fh->hit_eof ())
+ {
+ select_printf ("%s, saw EOF", fh->get_name ());
+ if (s->except_selected)
+ gotone = s->except_ready = TRUE;
+ if (s->read_selected)
+ gotone += s->read_ready = TRUE;
+ }
+
+out:
+ return gotone || s->write_ready;
+}
+
+static int
+poll_pipe (select_record *me, fd_set *readfds, fd_set *writefds,
+ fd_set *exceptfds)
+{
+ return peek_pipe (me, 0) ?
+ set_bits (me, readfds, writefds, exceptfds) :
+ 0;
+}
+
+MAKEready(pipe)
+
+static int start_thread_pipe (select_record *me, select_stuff *stuff);
+
+struct pipeinf
+ {
+ HANDLE thread;
+ BOOL stop_thread_pipe;
+ select_record *start;
+ };
+
+static DWORD WINAPI
+thread_pipe (void *arg)
+{
+ pipeinf *pi = (pipeinf *)arg;
+ BOOL gotone = FALSE;
+
+ for (;;)
+ {
+ select_record *s = pi->start;
+ while ((s = s->next))
+ if (s->startup == start_thread_pipe)
+ {
+ if (peek_pipe (s, 0))
+ gotone = TRUE;
+ if (pi->stop_thread_pipe)
+ {
+ select_printf ("stopping");
+ goto out;
+ }
+ }
+ if (gotone)
+ break;
+ Sleep (10);
+ }
+out:
+ return 0;
+}
+
+static int
+start_thread_pipe (select_record *me, select_stuff *stuff)
+{
+ if (stuff->device_specific[FHDEVN(FH_PIPE)])
+ {
+ me->h = ((pipeinf *) stuff->device_specific[FHDEVN(FH_PIPE)])->thread;
+ return 1;
+ }
+ pipeinf *pi = new pipeinf;
+ pi->start = &stuff->start;
+ pi->stop_thread_pipe = FALSE;
+ pi->thread = me->h = makethread (thread_pipe, (LPVOID)pi, 0, "select_pipe");
+ if (!me->h)
+ return 0;
+ stuff->device_specific[FHDEVN(FH_PIPE)] = (void *)pi;
+ return 1;
+}
+
+static void
+pipe_cleanup (select_record *me, select_stuff *stuff)
+{
+ pipeinf *pi = (pipeinf *)stuff->device_specific[FHDEVN(FH_PIPE)];
+ if (pi && pi->thread)
+ {
+ pi->stop_thread_pipe = TRUE;
+ WaitForSingleObject (pi->thread, INFINITE);
+ CloseHandle (pi->thread);
+ delete pi;
+ stuff->device_specific[FHDEVN(FH_PIPE)] = NULL;
+ }
+}
+
+select_record *
+fhandler_pipe::select_read (select_record *s)
+{
+ if (!s)
+ s = new select_record;
+ s->startup = start_thread_pipe;
+ s->poll = poll_pipe;
+ s->verify = verify_ok;
+ s->read_selected = TRUE;
+ s->cleanup = pipe_cleanup;
+ return s;
+}
+
+select_record *
+fhandler_pipe::select_write (select_record *s)
+{
+ if (!s)
+ {
+ s = new select_record;
+ s->startup = no_startup;
+ s->poll = poll_pipe;
+ s->verify = no_verify;
+ }
+ s->write_selected = TRUE;
+ s->write_ready = TRUE;
+ return s;
+}
+
+select_record *
+fhandler_pipe::select_except (select_record *s)
+{
+ if (!s)
+ s = new select_record;
+ s->startup = start_thread_pipe;
+ s->poll = poll_pipe;
+ s->verify = verify_ok;
+ s->cleanup = pipe_cleanup;
+ s->except_selected = TRUE;
+ return s;
+}
+
+static int
+peek_console (select_record *me, int ignra)
+{
+ extern const char * get_nonascii_key (INPUT_RECORD& input_rec);
+ fhandler_console *fh = (fhandler_console *)me->fh;
+
+ if (!me->read_selected)
+ return me->write_ready;
+
+ if (!ignra && fh->get_readahead_valid ())
+ {
+ select_printf ("readahead");
+ return me->read_ready = 1;
+ }
+
+ INPUT_RECORD irec;
+ DWORD events_read;
+ HANDLE h;
+ set_handle_or_return_if_not_open (h, me);
+
+ for (;;)
+ if (fh->bg_check (SIGTTIN) <= 0)
+ return me->read_ready = 1;
+ else if (!PeekConsoleInput (h, &irec, 1, &events_read) || !events_read)
+ break;
+ else
+ {
+ if (irec.EventType == WINDOW_BUFFER_SIZE_EVENT)
+ kill_pgrp (fh->tc->getpgid (), SIGWINCH);
+ else if (irec.EventType == KEY_EVENT && irec.Event.KeyEvent.bKeyDown == TRUE &&
+ (irec.Event.KeyEvent.uChar.AsciiChar || get_nonascii_key (irec)))
+ return me->read_ready = 1;
+
+ /* Read and discard the event */
+ ReadConsoleInput (h, &irec, 1, &events_read);
+ }
+
+ return me->write_ready;
+}
+
+static int
+poll_console (select_record *me, fd_set *readfds, fd_set *writefds,
+ fd_set *exceptfds)
+{
+ return peek_console (me, 0) ?
+ set_bits (me, readfds, writefds, exceptfds) :
+ 0;
+}
+
+MAKEready (console)
+
+select_record *
+fhandler_console::select_read (select_record *s)
+{
+ if (!s)
+ {
+ s = new select_record;
+ s->startup = no_startup;
+ s->poll = poll_console;
+ s->verify = poll_console;
+ }
+
+ s->h = get_handle ();
+ s->read_selected = TRUE;
+ return s;
+}
+
+select_record *
+fhandler_console::select_write (select_record *s)
+{
+ if (!s)
+ {
+ s = new select_record;
+ s->startup = no_startup;
+ s->poll = poll_console;
+ s->verify = no_verify;
+ }
+
+ s->write_selected = TRUE;
+ s->write_ready = TRUE;
+ return s;
+}
+
+select_record *
+fhandler_console::select_except (select_record *s)
+{
+ if (!s)
+ {
+ s = new select_record;
+ s->startup = no_startup;
+ s->poll = poll_console;
+ s->verify = no_verify;
+ }
+
+ s->except_selected = TRUE;
+ return s;
+}
+
+int
+fhandler_tty_common::ready_for_read (int fd, DWORD howlong, int ignra)
+{
+#if 0
+ if (myself->pgid && get_ttyp ()->getpgid () != myself->pgid &&
+ myself->ctty == ttynum) // background process?
+ return 1; // Yes. Let read return an error
+#endif
+ return ((fhandler_pipe*)this)->fhandler_pipe::ready_for_read (fd, howlong, ignra);
+}
+
+select_record *
+fhandler_tty_common::select_read (select_record *s)
+{
+ return ((fhandler_pipe*)this)->fhandler_pipe::select_read (s);
+}
+
+select_record *
+fhandler_tty_common::select_write (select_record *s)
+{
+ return ((fhandler_pipe *)this)->fhandler_pipe::select_write (s);
+}
+
+select_record *
+fhandler_tty_common::select_except (select_record *s)
+{
+ return ((fhandler_pipe *)this)->fhandler_pipe::select_except (s);
+}
+
+select_record *
+fhandler_dev_null::select_read (select_record *s)
+{
+ if (!s)
+ {
+ s = new select_record;
+ s->startup = no_startup;
+ s->poll = set_bits;
+ s->verify = no_verify;
+ }
+ s->h = get_handle ();
+ s->read_selected = TRUE;
+ return s;
+}
+
+select_record *
+fhandler_dev_null::select_write (select_record *s)
+{
+ if (!s)
+ {
+ s = new select_record;
+ s->startup = no_startup;
+ s->poll = set_bits;
+ s->verify = no_verify;
+ }
+ s->h = get_handle ();
+ s->write_selected = TRUE;
+ return s;
+}
+
+select_record *
+fhandler_dev_null::select_except (select_record *s)
+{
+ if (!s)
+ {
+ s = new select_record;
+ s->startup = no_startup;
+ s->poll = set_bits;
+ s->verify = no_verify;
+ }
+ s->h = get_handle ();
+ s->except_selected = TRUE;
+ s->except_ready = TRUE;
+ return s;
+}
+
+static int start_thread_serial (select_record *me, select_stuff *stuff);
+
+struct serialinf
+ {
+ HANDLE thread;
+ BOOL stop_thread_serial;
+ select_record *start;
+ };
+
+static int
+peek_serial (select_record *s, int)
+{
+ DWORD ev;
+ COMSTAT st;
+
+ fhandler_serial *fh = (fhandler_serial *)s->fh;
+
+ if (fh->get_readahead_valid () || fh->overlapped_armed < 0)
+ return s->read_ready = 1;
+
+ select_printf ("fh->overlapped_armed %d", fh->overlapped_armed);
+
+ HANDLE h;
+ set_handle_or_return_if_not_open (h, s);
+ int ready = 0;
+ (void) SetCommMask (h, EV_RXCHAR);
+
+ if (!fh->overlapped_armed)
+ {
+ DWORD ev;
+ COMSTAT st;
+
+ ResetEvent (fh->io_status.hEvent);
+
+ if (!ClearCommError (h, &ev, &st))
+ {
+ debug_printf ("ClearCommError");
+ goto err;
+ }
+ else if (st.cbInQue)
+ return s->read_ready = 1;
+ else if (WaitCommEvent (h, &ev, &fh->io_status))
+ return s->read_ready = 1;
+ else if (GetLastError () == ERROR_IO_PENDING)
+ fh->overlapped_armed = 1;
+ else
+ {
+ debug_printf ("WaitCommEvent");
+ goto err;
+ }
+ }
+
+ HANDLE w4[2];
+ DWORD to;
+
+ w4[0] = fh->io_status.hEvent;
+ w4[1] = signal_arrived;
+ to = 10;
+
+ switch (WaitForMultipleObjects (2, w4, FALSE, to))
+ {
+ case WAIT_OBJECT_0:
+ if (!ClearCommError (h, &ev, &st))
+ {
+ debug_printf ("ClearCommError");
+ goto err;
+ }
+ else if (!st.cbInQue)
+ Sleep (to);
+ else
+ {
+ return s->read_ready = 1;
+ select_printf ("got something");
+ }
+ PurgeComm (h, PURGE_TXABORT | PURGE_RXABORT);
+ break;
+ case WAIT_OBJECT_0 + 1:
+ PurgeComm (h, PURGE_TXABORT | PURGE_RXABORT);
+ select_printf ("interrupt");
+ set_sig_errno (EINTR);
+ ready = -1;
+ break;
+ case WAIT_TIMEOUT:
+ PurgeComm (h, PURGE_TXABORT | PURGE_RXABORT);
+ break;
+ default:
+ PurgeComm (h, PURGE_TXABORT | PURGE_RXABORT);
+ debug_printf ("WaitForMultipleObjects");
+ goto err;
+ }
+
+ return ready;
+
+err:
+ if (GetLastError () == ERROR_OPERATION_ABORTED)
+ {
+ select_printf ("operation aborted");
+ return ready;
+ }
+
+ __seterrno ();
+ s->saw_error = TRUE;
+ select_printf ("error %E");
+ return -1;
+}
+
+static DWORD WINAPI
+thread_serial (void *arg)
+{
+ serialinf *si = (serialinf *)arg;
+ BOOL gotone= FALSE;
+
+ for (;;)
+ {
+ select_record *s = si->start;
+ while ((s = s->next))
+ if (s->startup == start_thread_serial)
+ {
+ if (peek_serial (s, 0))
+ gotone = TRUE;
+ }
+ if (si->stop_thread_serial)
+ {
+ select_printf ("stopping");
+ break;
+ }
+ if (gotone)
+ break;
+ }
+
+ select_printf ("exiting");
+ return 0;
+}
+
+static int
+start_thread_serial (select_record *me, select_stuff *stuff)
+{
+ if (stuff->device_specific[FHDEVN(FH_SERIAL)])
+ {
+ me->h = ((pipeinf *) stuff->device_specific[FHDEVN(FH_SERIAL)])->thread;
+ return 1;
+ }
+ serialinf *si = new serialinf;
+ si->start = &stuff->start;
+ si->stop_thread_serial = FALSE;
+ si->thread = me->h = makethread (thread_serial, (LPVOID)si, 0, "select_serial");
+ if (!me->h)
+ return 0;
+ stuff->device_specific[FHDEVN(FH_SERIAL)] = (void *)si;
+ return 1;
+}
+
+static void
+serial_cleanup (select_record *me, select_stuff *stuff)
+{
+ serialinf *si = (serialinf *)stuff->device_specific[FHDEVN(FH_SERIAL)];
+ if (si && si->thread)
+ {
+ si->stop_thread_serial = TRUE;
+ WaitForSingleObject (si->thread, INFINITE);
+ CloseHandle (si->thread);
+ delete si;
+ stuff->device_specific[FHDEVN(FH_SERIAL)] = NULL;
+ }
+}
+
+static int
+poll_serial (select_record *me, fd_set *readfds, fd_set *writefds,
+ fd_set *exceptfds)
+
+{
+ return peek_serial (me, 0) ?
+ set_bits (me, readfds, writefds, exceptfds) :
+ 0;
+}
+
+MAKEready (serial)
+
+select_record *
+fhandler_serial::select_read (select_record *s)
+{
+ if (!s)
+ {
+ s = new select_record;
+ s->startup = start_thread_serial;
+ s->poll = poll_serial;
+ s->verify = verify_ok;
+ s->cleanup = serial_cleanup;
+ }
+ s->read_selected = TRUE;
+ return s;
+}
+
+select_record *
+fhandler_serial::select_write (select_record *s)
+{
+ if (!s)
+ {
+ s = new select_record;
+ s->startup = no_startup;
+ s->poll = set_bits;
+ s->verify = verify_ok;
+ }
+ s->h = get_handle ();
+ s->write_selected = TRUE;
+ s->write_ready = TRUE;
+ return s;
+}
+
+select_record *
+fhandler_serial::select_except (select_record *s)
+{
+ if (!s)
+ {
+ s = new select_record;
+ s->startup = no_startup;
+ s->poll = set_bits;
+ s->verify = verify_ok;
+ }
+ s->h = NULL;
+ s->except_selected = FALSE; // Can't do this
+ return s;
+}
+
+int
+fhandler_base::ready_for_read (int, DWORD, int)
+{
+ return 1;
+}
+
+select_record *
+fhandler_base::select_read (select_record *s)
+{
+ if (!s)
+ {
+ s = new select_record;
+ s->startup = no_startup;
+ s->poll = set_bits;
+ s->verify = verify_ok;
+ }
+ s->h = get_handle ();
+ s->read_selected = TRUE;
+ s->read_ready = TRUE;
+ return s;
+}
+
+select_record *
+fhandler_base::select_write (select_record *s)
+{
+ if (!s)
+ {
+ s = new select_record;
+ s->startup = no_startup;
+ s->poll = set_bits;
+ s->verify = verify_ok;
+ }
+ s->h = get_handle ();
+ s->write_selected = TRUE;
+ s->write_ready = TRUE;
+ return s;
+}
+
+select_record *
+fhandler_base::select_except (select_record *s)
+{
+ if (!s)
+ {
+ s = new select_record;
+ s->startup = no_startup;
+ s->poll = set_bits;
+ s->verify = verify_ok;
+ }
+ s->h = NULL;
+ s->write_selected = TRUE;
+ return s;
+}
+
+struct socketinf
+ {
+ HANDLE thread;
+ winsock_fd_set readfds, writefds, exceptfds;
+ SOCKET exitsock;
+ struct sockaddr_in sin;
+ select_record *start;
+ };
+
+static int
+peek_socket (select_record *me, int)
+{
+ winsock_fd_set ws_readfds, ws_writefds, ws_exceptfds;
+ struct timeval tv = {0};
+ WINSOCK_FD_ZERO (&ws_readfds);
+ WINSOCK_FD_ZERO (&ws_writefds);
+ WINSOCK_FD_ZERO (&ws_exceptfds);
+ int gotone = 0;
+
+ HANDLE h;
+ set_handle_or_return_if_not_open (h, me);
+ select_printf ("considering handle %p", h);
+
+ if (me->read_selected)
+ {
+ select_printf ("adding read fd_set %s, fd %d", me->fh->get_name (),
+ me->fd);
+ WINSOCK_FD_SET (h, &ws_readfds);
+ }
+ if (me->write_selected)
+ {
+ select_printf ("adding write fd_set %s, fd %d", me->fh->get_name (),
+ me->fd);
+ WINSOCK_FD_SET (h, &ws_writefds);
+ }
+ if (me->except_selected)
+ {
+ select_printf ("adding except fd_set %s, fd %d", me->fh->get_name (),
+ me->fd);
+ WINSOCK_FD_SET (h, &ws_exceptfds);
+ }
+ int r = WINSOCK_SELECT (0, &ws_readfds, &ws_writefds, &ws_exceptfds, &tv);
+ select_printf ("WINSOCK_SELECT returned %d", r);
+ if (r == -1)
+ {
+ select_printf ("error %d", WSAGetLastError ());
+ return 0;
+ }
+
+ if (WINSOCK_FD_ISSET (h, &ws_readfds))
+ gotone = me->read_ready = TRUE;
+ if (WINSOCK_FD_ISSET (h, &ws_writefds))
+ gotone = me->write_ready = TRUE;
+ if (WINSOCK_FD_ISSET (h, &ws_exceptfds))
+ gotone = me->except_ready = TRUE;
+ return gotone;
+}
+
+static int
+poll_socket (select_record *me, fd_set *readfds, fd_set *writefds,
+ fd_set *exceptfds)
+{
+ return peek_socket (me, 0) ?
+ set_bits (me, readfds, writefds, exceptfds) :
+ 0;
+}
+
+MAKEready (socket)
+
+static int start_thread_socket (select_record *, select_stuff *);
+
+static DWORD WINAPI
+thread_socket (void *arg)
+{
+ socketinf *si = (socketinf *)arg;
+
+ select_printf ("stuff_start %p", &si->start);
+ int r = WINSOCK_SELECT (0, &si->readfds, &si->writefds, &si->exceptfds, NULL);
+ select_printf ("Win32 select returned %d", r);
+ if (r == -1)
+ select_printf ("error %d", WSAGetLastError ());
+ select_record *s = si->start;
+ while ((s = s->next))
+ if (s->startup == start_thread_socket)
+ {
+ HANDLE h = s->fh->get_handle ();
+ select_printf ("s %p, testing fd %d (%s)", s, s->fd, s->fh->get_name ());
+ if (WINSOCK_FD_ISSET (h, &si->readfds))
+ {
+ select_printf ("read_ready");
+ s->read_ready = TRUE;
+ }
+ if (WINSOCK_FD_ISSET (h, &si->writefds))
+ {
+ select_printf ("write_ready");
+ s->write_ready = TRUE;
+ }
+ if (WINSOCK_FD_ISSET (h, &si->exceptfds))
+ {
+ select_printf ("except_ready");
+ s->except_ready = TRUE;
+ }
+ }
+
+ if (WINSOCK_FD_ISSET (si->exitsock, &si->readfds))
+ select_printf ("saw exitsock read");
+
+ return 0;
+}
+
+extern "C" unsigned long htonl (unsigned long);
+
+static int
+start_thread_socket (select_record *me, select_stuff *stuff)
+{
+ socketinf *si;
+
+ if ((si = (socketinf *)stuff->device_specific[FHDEVN(FH_SOCKET)]))
+ {
+ me->h = si->thread;
+ return 1;
+ }
+
+ si = new socketinf;
+ WINSOCK_FD_ZERO (&si->readfds);
+ WINSOCK_FD_ZERO (&si->writefds);
+ WINSOCK_FD_ZERO (&si->exceptfds);
+ select_record *s = &stuff->start;
+ while ((s = s->next))
+ if (s->startup == start_thread_socket)
+ {
+ HANDLE h = s->fh->get_handle ();
+ select_printf ("Handle %p", h);
+ if (s->read_selected)
+ {
+ WINSOCK_FD_SET (h, &si->readfds);
+ select_printf ("Added to readfds");
+ }
+ if (s->write_selected)
+ {
+ WINSOCK_FD_SET (h, &si->writefds);
+ select_printf ("Added to writefds");
+ }
+ if (s->except_selected)
+ {
+ WINSOCK_FD_SET (h, &si->exceptfds);
+ select_printf ("Added to exceptfds");
+ }
+ }
+
+ if ((si->exitsock = socket (PF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
+ {
+ set_winsock_errno ();
+ select_printf ("cannot create socket, %E");
+ return -1;
+ }
+ /* Allow rapid reuse of the port. */
+ int tmp = 1;
+ (void) setsockopt (si->exitsock, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, sizeof (tmp));
+
+ int sin_len = sizeof(si->sin);
+ memset (&si->sin, 0, sizeof (si->sin));
+ si->sin.sin_family = AF_INET;
+ si->sin.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
+ if (bind (si->exitsock, (struct sockaddr *) &si->sin, sizeof (si->sin)) < 0)
+ {
+ select_printf ("cannot bind socket, %E");
+ goto err;
+ }
+
+ if (getsockname (si->exitsock, (struct sockaddr *) &si->sin, &sin_len) < 0)
+ {
+ select_printf ("getsockname error");
+ goto err;
+ }
+
+ if (listen (si->exitsock, 1))
+ {
+ select_printf ("listen failed, %E");
+ goto err;
+ }
+
+ select_printf ("exitsock %p", si->exitsock);
+ WINSOCK_FD_SET ((HANDLE) si->exitsock, &si->readfds);
+ WINSOCK_FD_SET ((HANDLE) si->exitsock, &si->exceptfds);
+ stuff->device_specific[FHDEVN(FH_SOCKET)] = (void *) si;
+ si->start = &stuff->start;
+ select_printf ("stuff_start %p", &stuff->start);
+ si->thread = me->h = makethread (thread_socket, (LPVOID)si, 0,
+ "select_socket");
+ return !!me->h;
+
+err:
+ set_winsock_errno ();
+ closesocket (si->exitsock);
+ return -1;
+}
+
+void
+socket_cleanup (select_record *me, select_stuff *stuff)
+{
+ socketinf *si = (socketinf *)stuff->device_specific[FHDEVN(FH_SOCKET)];
+ select_printf ("si %p si->thread %p", si, si ? si->thread : NULL);
+ if (si && si->thread)
+ {
+ select_printf ("connection to si->exitsock %p", si->exitsock);
+ SOCKET s = socket (AF_INET, SOCK_STREAM, 0);
+ /* Connecting to si->exitsock will cause any executing select to wake
+ up. When this happens then the exitsock condition will cause the
+ thread to terminate. */
+ if (connect (s, (struct sockaddr *) &si->sin, sizeof (si->sin)) < 0)
+ {
+ set_winsock_errno ();
+ select_printf ("connect failed");
+ /* FIXME: now what? */
+ }
+ closesocket (s);
+
+ /* Wait for thread to go away */
+ WaitForSingleObject (si->thread, INFINITE);
+ closesocket (si->exitsock);
+ CloseHandle (si->thread);
+ stuff->device_specific[FHDEVN(FH_SOCKET)] = NULL;
+ delete si;
+ }
+ select_printf ("returning");
+}
+
+select_record *
+fhandler_socket::select_read (select_record *s)
+{
+ if (!s)
+ {
+ s = new select_record;
+ s->startup = start_thread_socket;
+ s->poll = poll_socket;
+ s->verify = verify_true;
+ s->cleanup = socket_cleanup;
+ }
+ s->read_selected = TRUE;
+ return s;
+}
+
+select_record *
+fhandler_socket::select_write (select_record *s)
+{
+ if (!s)
+ {
+ s = new select_record;
+ s->startup = start_thread_socket;
+ s->poll = poll_socket;
+ s->verify = verify_true;
+ s->cleanup = socket_cleanup;
+ }
+ s->write_selected = TRUE;
+ return s;
+}
+
+select_record *
+fhandler_socket::select_except (select_record *s)
+{
+ if (!s)
+ {
+ s = new select_record;
+ s->startup = start_thread_socket;
+ s->poll = poll_socket;
+ s->verify = verify_true;
+ s->cleanup = socket_cleanup;
+ }
+ s->except_selected = TRUE;
+ return s;
+}
+
+static int
+peek_windows (select_record *me, int)
+{
+ MSG m;
+ HANDLE h;
+ set_handle_or_return_if_not_open (h, me);
+ if (PeekMessage (&m, (HWND) h, 0, 0, PM_NOREMOVE))
+ {
+ me->read_ready = TRUE;
+ select_printf ("window %d(%p) ready", me->fd, me->fh->get_handle ());
+ return 1;
+ }
+
+ select_printf ("window %d(%p) not ready", me->fd, me->fh->get_handle ());
+ return me->write_ready;
+}
+
+static int
+poll_windows (select_record *me, fd_set *readfds, fd_set *writefds,
+ fd_set *exceptfds)
+{
+
+ return peek_windows (me, 0) ?
+ set_bits (me, readfds, writefds, exceptfds) :
+ 0;
+}
+
+MAKEready (windows)
+
+select_record *
+fhandler_windows::select_read (select_record *s)
+{
+ if (!s)
+ {
+ s = new select_record;
+ s->startup = no_startup;
+ s->poll = poll_windows;
+ s->verify = poll_windows;
+ }
+ s->h = get_handle ();
+ s->read_selected = TRUE;
+ s->h = get_handle ();
+ s->windows_handle = TRUE;
+ return s;
+}
+
+select_record *
+fhandler_windows::select_write (select_record *s)
+{
+ if (!s)
+ {
+ s = new select_record;
+ s->startup = no_startup;
+ s->poll = set_bits;
+ s->verify = verify_ok;
+ }
+ s->h = get_handle ();
+ s->write_selected = TRUE;
+ s->write_ready = TRUE;
+ s->windows_handle = TRUE;
+ return s;
+}
+
+select_record *
+fhandler_windows::select_except (select_record *s)
+{
+ if (!s)
+ {
+ s = new select_record;
+ s->startup = no_startup;
+ s->poll = set_bits;
+ s->verify = verify_ok;
+ }
+ s->h = get_handle ();
+ s->except_selected = TRUE;
+ s->except_ready = TRUE;
+ s->windows_handle = TRUE;
+ return s;
+}
generated by cgit v1.1 at 2025-01-30 17:48:29 +0000