diff options
| -rw-r--r-- | ChangeLog | 19 | ||||
| -rw-r--r-- | hurd/Makefile | 2 | ||||
| -rw-r--r-- | hurd/hurd/fd.h | 16 | ||||
| -rw-r--r-- | hurd/hurdselect.c | 444 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/pselect.c | 45 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/select.c | 307 |
6 files changed, 531 insertions, 302 deletions
diff --git a/ChangeLog b/ChangeLog index 70039a8cf3..6d84569448 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,20 @@ +1998-12-05 Roland McGrath <roland@baalperazim.frob.com> + + * sysdeps/mach/hurd/pselect.c: New file. + + * sysdeps/mach/hurd/poll.c: New file. + + * hurd/Makefile (routines): Add hurdselect. + * hurd/hurdselect.c: New file. + (_hurd_select): New function, guts taken from ... + * sysdeps/mach/hurd/select.c (__select): ... here. + Now work by just calling _hurd_select. + * hurd/hurd/fd.h: Declare _hurd_select. + +1998-12-05 Roland McGrath <roland@baalperazim.frob.com> + + * time/strptime.c: Fix unterminated comment in last change. + 1998-12-05 Ulrich Drepper <drepper@cygnus.com> * ctype/ctype.h (_ISbit): Protect use of parameter with @@ -13,7 +30,7 @@ 1998-12-04 Ulrich Drepper <drepper@cygnus.com> - * argp/argp.h: Add __retrict. + * argp/argp.h: Add __restrict. * dirent/dirent.h: Likewise. * elf/dlfcn.h: Likewise. * grp/grp.h: Likewise. diff --git a/hurd/Makefile b/hurd/Makefile index 250e441acf..07e22ebe1b 100644 --- a/hurd/Makefile +++ b/hurd/Makefile @@ -41,7 +41,7 @@ user-interfaces := $(addprefix hurd/,\ server-interfaces := hurd/msg faultexc routines = hurdstartup hurdinit \ - hurdid hurdlookup hurdpid hurdrlimit hurdprio hurdexec \ + hurdid hurdlookup hurdpid hurdrlimit hurdprio hurdexec hurdselect \ get-host set-host \ path-lookup \ setauth \ diff --git a/hurd/hurd/fd.h b/hurd/hurd/fd.h index 10fd563089..aa48f21acf 100644 --- a/hurd/hurd/fd.h +++ b/hurd/hurd/fd.h @@ -1,5 +1,5 @@ /* File descriptors. - Copyright (C) 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc. + Copyright (C) 1993,94,95,96,97,98 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -223,4 +223,18 @@ extern error_t _hurd_ctty_input (io_t port, io_t ctty, error_t (*rpc) (io_t)); extern error_t _hurd_ctty_output (io_t port, io_t ctty, error_t (*rpc) (io_t)); +/* The guts of `select' and `poll'. Check the first NFDS descriptors + either in POLLFDS (if nonnull) or in each of READFDS, WRITEFDS, + EXCEPTFDS that is nonnull. If TIMEOUT is not NULL, time out after + waiting the interval specified therein. If SIGMASK is nonnull, + the set of blocked signals is temporarily set to that during this call. + Returns the number of ready descriptors, or -1 for errors. */ +struct pollfd; +struct timespec; +extern int _hurd_select (int nfds, struct pollfd *pollfds, + fd_set *readfds, fd_set *writefds, fd_set *exceptfds, + const struct timespec *timeout, + const sigset_t *sigmask); + + #endif /* hurd/fd.h */ diff --git a/hurd/hurdselect.c b/hurd/hurdselect.c new file mode 100644 index 0000000000..e65def5912 --- /dev/null +++ b/hurd/hurdselect.c @@ -0,0 +1,444 @@ +/* Guts of both `select' and `poll' for Hurd. + Copyright (C) 1991,92,93,94,95,96,97,98 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <sys/types.h> +#include <sys/poll.h> +#include <hurd.h> +#include <hurd/fd.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> +#include <stdint.h> + +/* All user select types. */ +#define SELECT_ALL (SELECT_READ | SELECT_WRITE | SELECT_URG) + +/* Used to record that a particular select rpc returned. Must be distinct + from SELECT_ALL (which better not have the high bit set). */ +#define SELECT_RETURNED ((SELECT_ALL << 1) & ~SELECT_ALL) + +/* Check the first NFDS descriptors either in POLLFDS (if nonnnull) or in + each of READFDS, WRITEFDS, EXCEPTFDS that is nonnull. If TIMEOUT is not + NULL, time out after waiting the interval specified therein. Returns + the number of ready descriptors, or -1 for errors. */ +int +_hurd_select (int nfds, + struct pollfd *pollfds, + fd_set *readfds, fd_set *writefds, fd_set *exceptfds, + const struct timespec *timeout, const sigset_t *sigmask) +{ + int i; + mach_port_t portset; + int got; + error_t err; + fd_set rfds, wfds, xfds; + int firstfd, lastfd; + mach_msg_timeout_t to = (timeout != NULL ? + (timeout->tv_sec * 1000 + + timeout->tv_nsec / 1000000) : + 0); + struct + { + struct hurd_userlink ulink; + struct hurd_fd *cell; + mach_port_t io_port; + int type; + mach_port_t reply_port; + } d[nfds]; + sigset_t oset; + + if (sigmask && __sigprocmask (SIG_SETMASK, sigmask, &oset)) + return -1; + + if (pollfds) + { + /* Collect interesting descriptors from the user's `pollfd' array. + We do a first pass that reads the user's array before taking + any locks. The second pass then only touches our own stack, + and gets the port references. */ + + for (i = 0; i < nfds; ++i) + if (pollfds[i].fd >= 0) + { + int type = 0; + if (pollfds[i].events & POLLIN) + type |= SELECT_READ; + if (pollfds[i].events & POLLOUT) + type |= SELECT_WRITE; + if (pollfds[i].events & POLLPRI) + type |= SELECT_URG; + + d[i].io_port = pollfds[i].fd; + d[i].type = type; + } + else + d[i].type = 0; + + HURD_CRITICAL_BEGIN; + __mutex_lock (&_hurd_dtable_lock); + + for (i = 0; i < nfds; ++i) + if (d[i].type != 0) + { + const int fd = (int) d[i].io_port; + + if (fd < _hurd_dtablesize) + { + d[i].cell = _hurd_dtable[fd]; + d[i].io_port = _hurd_port_get (&d[i].cell->port, &d[i].ulink); + if (d[i].io_port != MACH_PORT_NULL) + continue; + } + + /* If one descriptor is bogus, we fail completely. */ + while (i-- > 0) + if (d[i].type != 0) + _hurd_port_free (&d[i].cell->port, + &d[i].ulink, d[i].io_port); + break; + } + + __mutex_unlock (&_hurd_dtable_lock); + HURD_CRITICAL_END; + + if (i < nfds) + { + if (sigmask) + __sigprocmask (SIG_SETMASK, &oset, NULL); + errno = EBADF; + return -1; + } + + lastfd = i - 1; + firstfd = i == 0 ? lastfd : 0; + } + else + { + /* Collect interested descriptors from the user's fd_set arguments. + Use local copies so we can't crash from user bogosity. */ + + if (readfds == NULL) + FD_ZERO (&rfds); + else + rfds = *readfds; + if (writefds == NULL) + FD_ZERO (&wfds); + else + wfds = *writefds; + if (exceptfds == NULL) + FD_ZERO (&xfds); + else + xfds = *exceptfds; + + HURD_CRITICAL_BEGIN; + __mutex_lock (&_hurd_dtable_lock); + + if (nfds > _hurd_dtablesize) + nfds = _hurd_dtablesize; + + /* Collect the ports for interesting FDs. */ + firstfd = lastfd = -1; + for (i = 0; i < nfds; ++i) + { + int type = 0; + if (readfds != NULL && FD_ISSET (i, &rfds)) + type |= SELECT_READ; + if (writefds != NULL && FD_ISSET (i, &wfds)) + type |= SELECT_WRITE; + if (exceptfds != NULL && FD_ISSET (i, &xfds)) + type |= SELECT_URG; + d[i].type = type; + if (type) + { + d[i].cell = _hurd_dtable[i]; + d[i].io_port = _hurd_port_get (&d[i].cell->port, &d[i].ulink); + if (d[i].io_port == MACH_PORT_NULL) + { + /* If one descriptor is bogus, we fail completely. */ + while (i-- > 0) + _hurd_port_free (&d[i].cell->port, &d[i].ulink, + d[i].io_port); + break; + } + lastfd = i; + if (firstfd == -1) + firstfd = i; + } + } + + __mutex_unlock (&_hurd_dtable_lock); + HURD_CRITICAL_END; + + if (i < nfds) + { + if (sigmask) + __sigprocmask (SIG_SETMASK, &oset, NULL); + errno = EBADF; + return -1; + } + } + + + err = 0; + got = 0; + + /* Send them all io_select request messages. */ + + if (firstfd == -1) + /* But not if there were no ports to deal with at all. + We are just a pure timeout. */ + portset = __mach_reply_port (); + else + { + portset = MACH_PORT_NULL; + + for (i = firstfd; i <= lastfd; ++i) + if (d[i].type) + { + int type = d[i].type; + d[i].reply_port = __mach_reply_port (); + err = __io_select (d[i].io_port, d[i].reply_port, + /* Poll only if there's a single descriptor. */ + (firstfd == lastfd) ? to : 0, + &type); + switch (err) + { + case MACH_RCV_TIMED_OUT: + /* No immediate response. This is normal. */ + err = 0; + if (firstfd == lastfd) + /* When there's a single descriptor, we don't need a + portset, so just pretend we have one, but really + use the single reply port. */ + portset = d[i].reply_port; + else if (got == 0) + /* We've got multiple reply ports, so we need a port set to + multiplex them. */ + { + /* We will wait again for a reply later. */ + if (portset == MACH_PORT_NULL) + /* Create the portset to receive all the replies on. */ + err = __mach_port_allocate (__mach_task_self (), + MACH_PORT_RIGHT_PORT_SET, + &portset); + if (! err) + /* Put this reply port in the port set. */ + __mach_port_move_member (__mach_task_self (), + d[i].reply_port, portset); + } + break; + + default: + /* No other error should happen. Callers of select + don't expect to see errors, so we simulate + readiness of the erring object and the next call + hopefully will get the error again. */ + type = SELECT_ALL; + /* FALLTHROUGH */ + + case 0: + /* We got an answer. */ + if ((type & SELECT_ALL) == 0) + /* Bogus answer; treat like an error, as a fake positive. */ + type = SELECT_ALL; + + /* This port is already ready already. */ + d[i].type &= type; + d[i].type |= SELECT_RETURNED; + ++got; + break; + } + _hurd_port_free (&d[i].cell->port, &d[i].ulink, d[i].io_port); + } + } + + /* Now wait for reply messages. */ + if (!err && got == 0) + { + /* Now wait for io_select_reply messages on PORT, + timing out as appropriate. */ + + union + { + mach_msg_header_t head; + struct + { + mach_msg_header_t head; + mach_msg_type_t err_type; + error_t err; + } error; + struct + { + mach_msg_header_t head; + mach_msg_type_t err_type; + error_t err; + mach_msg_type_t result_type; + int result; + } success; + } msg; + mach_msg_option_t options = (timeout == NULL ? 0 : MACH_RCV_TIMEOUT); + error_t msgerr; + while ((msgerr = __mach_msg (&msg.head, + MACH_RCV_MSG | options, + 0, sizeof msg, portset, to, + MACH_PORT_NULL)) == MACH_MSG_SUCCESS) + { + /* We got a message. Decode it. */ +#define IO_SELECT_REPLY_MSGID (21012 + 100) /* XXX */ + const mach_msg_type_t inttype = + { MACH_MSG_TYPE_INTEGER_T, sizeof (MACH_MSG_TYPE_INTEGER_T) * 8, + 1, 1, 0, 0 }; + if (msg.head.msgh_id == IO_SELECT_REPLY_MSGID && + msg.head.msgh_size >= sizeof msg.error && + !(msg.head.msgh_bits & MACH_MSGH_BITS_COMPLEX) && + *(int *) &msg.error.err_type == *(int *) &inttype) + { + /* This is a properly formatted message so far. + See if it is a success or a failure. */ + if (msg.error.err == EINTR && + msg.head.msgh_size == sizeof msg.error) + { + /* EINTR response; poll for further responses + and then return quickly. */ + err = EINTR; + goto poll; + } + if (msg.error.err || + msg.head.msgh_size != sizeof msg.success || + *(int *) &msg.success.result_type != *(int *) &inttype || + (msg.success.result & SELECT_ALL) == 0) + { + /* Error or bogus reply. Simulate readiness. */ + __mach_msg_destroy (&msg.head); + msg.success.result = SELECT_ALL; + } + + /* Look up the respondent's reply port and record its + readiness. */ + { + int had = got; + if (firstfd != -1) + for (i = firstfd; i <= lastfd; ++i) + if (d[i].type + && d[i].reply_port == msg.head.msgh_local_port) + { + d[i].type &= msg.success.result; + d[i].type |= SELECT_RETURNED; + ++got; + } + assert (got > had); + } + } + + if (msg.head.msgh_remote_port != MACH_PORT_NULL) + __mach_port_deallocate (__mach_task_self (), + msg.head.msgh_remote_port); + + if (got) + poll: + { + /* Poll for another message. */ + to = 0; + options |= MACH_RCV_TIMEOUT; + } + } + + if (err == MACH_RCV_TIMED_OUT) + /* This is the normal value for ERR. We might have timed out and + read no messages. Otherwise, after receiving the first message, + we poll for more messages. We receive with a timeout of 0 to + effect a poll, so ERR is MACH_RCV_TIMED_OUT when the poll finds no + message waiting. */ + err = 0; + + if (got) + /* At least one descriptor is known to be ready now, so we will + return success. */ + err = 0; + } + + if (firstfd != -1) + for (i = firstfd; i <= lastfd; ++i) + if (d[i].type) + __mach_port_destroy (__mach_task_self (), d[i].reply_port); + if (firstfd == -1 || (firstfd != lastfd && portset != MACH_PORT_NULL)) + /* Destroy PORTSET, but only if it's not actually the reply port for a + single descriptor (in which case it's destroyed in the previous loop; + not doing it here is just a bit more efficient). */ + __mach_port_destroy (__mach_task_self (), portset); + + if (err) + { + if (sigmask) + __sigprocmask (SIG_SETMASK, &oset, NULL); + return __hurd_fail (err); + } + + if (pollfds) + /* Fill in the `revents' members of the user's array. */ + for (i = 0; i < nfds; ++i) + { + const int type = d[i].type; + int_fast16_t revents = 0; + + if (type & SELECT_READ) + revents |= POLLIN; + if (type & SELECT_WRITE) + revents |= POLLOUT; + if (type & SELECT_URG) + revents |= POLLPRI; + + pollfds[i].revents = revents; + } + else + { + /* Below we recalculate GOT to include an increment for each operation + allowed on each fd. */ + got = 0; + + /* Set the user bitarrays. We only ever have to clear bits, as all + desired ones are initially set. */ + if (firstfd != -1) + for (i = firstfd; i <= lastfd; ++i) + { + int type = d[i].type; + + if ((type & SELECT_RETURNED) == 0) + type = 0; + + if (type & SELECT_READ) + got++; + else if (readfds) + FD_CLR (i, readfds); + if (type & SELECT_WRITE) + got++; + else if (writefds) + FD_CLR (i, writefds); + if (type & SELECT_URG) + got++; + else if (exceptfds) + FD_CLR (i, exceptfds); + } + } + + if (sigmask && __sigprocmask (SIG_SETMASK, &oset, NULL)) + return -1; + + return got; +} diff --git a/sysdeps/mach/hurd/pselect.c b/sysdeps/mach/hurd/pselect.c new file mode 100644 index 0000000000..6c0bc7b297 --- /dev/null +++ b/sysdeps/mach/hurd/pselect.c @@ -0,0 +1,45 @@ +/* pselect for Hurd. + Copyright (C) 1998 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <errno.h> +#include <signal.h> +#include <sys/time.h> +#include <sys/select.h> +#include <hurd.h> +#include <hurd/fd.h> + +/* Check the first NFDS descriptors each in READFDS (if not NULL) for read + readiness, in WRITEFDS (if not NULL) for write readiness, and in EXCEPTFDS + (if not NULL) for exceptional conditions. If TIMEOUT is not NULL, time out + after waiting the interval specified therein. Additionally set the sigmask + SIGMASK for this call. Returns the number of ready descriptors, or -1 for + errors. */ +int +__pselect (nfds, readfds, writefds, exceptfds, timeout, sigmask) + int nfds; + fd_set *readfds; + fd_set *writefds; + fd_set *exceptfds; + const struct timespec *timeout; + const sigset_t *sigmask; +{ + return _hurd_select (nfds, NULL, + readfds, writefds, exceptfds, timeout, sigmask); +} +weak_alias (__pselect, pselect) diff --git a/sysdeps/mach/hurd/select.c b/sysdeps/mach/hurd/select.c index 904e1419ef..e58b542d0a 100644 --- a/sysdeps/mach/hurd/select.c +++ b/sysdeps/mach/hurd/select.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc. +/* Copyright (C) 1991,92,93,94,95,96,97,98 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -17,18 +17,9 @@ Boston, MA 02111-1307, USA. */ #include <sys/types.h> +#include <sys/time.h> #include <hurd.h> #include <hurd/fd.h> -#include <stdlib.h> -#include <string.h> -#include <assert.h> - -/* All user select types. */ -#define SELECT_ALL (SELECT_READ | SELECT_WRITE | SELECT_URG) - -/* Used to record that a particular select rpc returned. Must be distinct - from SELECT_ALL (which better not have the high bit set). */ -#define SELECT_RETURNED ((SELECT_ALL << 1) & ~SELECT_ALL) /* Check the first NFDS descriptors each in READFDS (if not NULL) for read readiness, in WRITEFDS (if not NULL) for write readiness, and in EXCEPTFDS @@ -43,299 +34,17 @@ __select (nfds, readfds, writefds, exceptfds, timeout) fd_set *exceptfds; struct timeval *timeout; { - int i; - mach_port_t portset; - int got; - error_t err; - fd_set rfds, wfds, xfds; - int firstfd, lastfd; - mach_msg_timeout_t to = (timeout != NULL ? - (timeout->tv_sec * 1000 + - timeout->tv_usec / 1000) : - 0); - struct - { - struct hurd_userlink ulink; - struct hurd_fd *cell; - mach_port_t io_port; - int type; - mach_port_t reply_port; - } d[nfds]; - - /* Use local copies so we can't crash from user bogosity. */ - if (readfds == NULL) - FD_ZERO (&rfds); - else - rfds = *readfds; - if (writefds == NULL) - FD_ZERO (&wfds); - else - wfds = *writefds; - if (exceptfds == NULL) - FD_ZERO (&xfds); - else - xfds = *exceptfds; - - HURD_CRITICAL_BEGIN; - __mutex_lock (&_hurd_dtable_lock); - - if (nfds > _hurd_dtablesize) - nfds = _hurd_dtablesize; + struct timespec ts, *to; - /* Collect the ports for interesting FDs. */ - firstfd = lastfd = -1; - for (i = 0; i < nfds; ++i) + if (timeout) { - int type = 0; - if (readfds != NULL && FD_ISSET (i, &rfds)) - type |= SELECT_READ; - if (writefds != NULL && FD_ISSET (i, &wfds)) - type |= SELECT_WRITE; - if (exceptfds != NULL && FD_ISSET (i, &xfds)) - type |= SELECT_URG; - d[i].type = type; - if (type) - { - d[i].cell = _hurd_dtable[i]; - d[i].io_port = _hurd_port_get (&d[i].cell->port, &d[i].ulink); - if (d[i].io_port == MACH_PORT_NULL) - { - /* If one descriptor is bogus, we fail completely. */ - while (i-- > 0) - _hurd_port_free (&d[i].cell->port, &d[i].ulink, d[i].io_port); - errno = EBADF; - break; - } - lastfd = i; - if (firstfd == -1) - firstfd = i; - } + to = &ts; + TIMEVAL_TO_TIMESPEC (timeout, to); } - - __mutex_unlock (&_hurd_dtable_lock); - HURD_CRITICAL_END; - - if (i < nfds) - return -1; - - /* Send them all io_select request messages. */ - - if (firstfd == -1) - /* But not if there were no ports to deal with at all. */ - portset = __mach_reply_port (); else - { - err = 0; - got = 0; - portset = MACH_PORT_NULL; - - for (i = firstfd; i <= lastfd; ++i) - if (d[i].type) - { - int type = d[i].type; - d[i].reply_port = __mach_reply_port (); - err = __io_select (d[i].io_port, d[i].reply_port, - /* Poll only if there's a single descriptor. */ - (firstfd == lastfd) ? to : 0, - &type); - switch (err) - { - case MACH_RCV_TIMED_OUT: - /* No immediate response. This is normal. */ - err = 0; - if (firstfd == lastfd) - /* When there's a single descriptor, we don't need a - portset, so just pretend we have one, but really - use the single reply port. */ - portset = d[i].reply_port; - else if (got == 0) - /* We've got multiple reply ports, so we need a port set to - multiplex them. */ - { - /* We will wait again for a reply later. */ - if (portset == MACH_PORT_NULL) - /* Create the portset to receive all the replies on. */ - err = __mach_port_allocate (__mach_task_self (), - MACH_PORT_RIGHT_PORT_SET, - &portset); - if (! err) - /* Put this reply port in the port set. */ - __mach_port_move_member (__mach_task_self (), - d[i].reply_port, portset); - } - break; - - default: - /* No other error should happen. Callers of select - don't expect to see errors, so we simulate - readiness of the erring object and the next call - hopefully will get the error again. */ - type = SELECT_ALL; - /* FALLTHROUGH */ - - case 0: - /* We got an answer. */ - if ((type & SELECT_ALL) == 0) - /* Bogus answer; treat like an error, as a fake positive. */ - type = SELECT_ALL; - - /* This port is already ready already. */ - d[i].type &= type; - d[i].type |= SELECT_RETURNED; - ++got; - break; - } - _hurd_port_free (&d[i].cell->port, &d[i].ulink, d[i].io_port); - } - } - - /* Now wait for reply messages. */ - if (!err && got == 0) - { - /* Now wait for io_select_reply messages on PORT, - timing out as appropriate. */ - - union - { - mach_msg_header_t head; - struct - { - mach_msg_header_t head; - mach_msg_type_t err_type; - error_t err; - } error; - struct - { - mach_msg_header_t head; - mach_msg_type_t err_type; - error_t err; - mach_msg_type_t result_type; - int result; - } success; - } msg; - mach_msg_option_t options = (timeout == NULL ? 0 : MACH_RCV_TIMEOUT); - error_t msgerr; - while ((msgerr = __mach_msg (&msg.head, - MACH_RCV_MSG | options, - 0, sizeof msg, portset, to, - MACH_PORT_NULL)) == MACH_MSG_SUCCESS) - { - /* We got a message. Decode it. */ -#define IO_SELECT_REPLY_MSGID (21012 + 100) /* XXX */ - const mach_msg_type_t inttype = - { MACH_MSG_TYPE_INTEGER_T, sizeof (MACH_MSG_TYPE_INTEGER_T) * 8, - 1, 1, 0, 0 }; - if (msg.head.msgh_id == IO_SELECT_REPLY_MSGID && - msg.head.msgh_size >= sizeof msg.error && - !(msg.head.msgh_bits & MACH_MSGH_BITS_COMPLEX) && - *(int *) &msg.error.err_type == *(int *) &inttype) - { - /* This is a properly formatted message so far. - See if it is a success or a failure. */ - if (msg.error.err == EINTR && - msg.head.msgh_size == sizeof msg.error) - { - /* EINTR response; poll for further responses - and then return quickly. */ - err = EINTR; - goto poll; - } - if (msg.error.err || - msg.head.msgh_size != sizeof msg.success || - *(int *) &msg.success.result_type != *(int *) &inttype || - (msg.success.result & SELECT_ALL) == 0) - { - /* Error or bogus reply. Simulate readiness. */ - __mach_msg_destroy (&msg.head); - msg.success.result = SELECT_ALL; - } - - /* Look up the respondent's reply port and record its - readiness. */ - { - int had = got; - if (firstfd != -1) - for (i = firstfd; i <= lastfd; ++i) - if (d[i].type - && d[i].reply_port == msg.head.msgh_local_port) - { - d[i].type &= msg.success.result; - d[i].type |= SELECT_RETURNED; - ++got; - } - assert (got > had); - } - } - - if (msg.head.msgh_remote_port != MACH_PORT_NULL) - __mach_port_deallocate (__mach_task_self (), - msg.head.msgh_remote_port); - - if (got) - poll: - { - /* Poll for another message. */ - to = 0; - options |= MACH_RCV_TIMEOUT; - } - } - - if (err == MACH_RCV_TIMED_OUT) - /* This is the normal value for ERR. We might have timed out and - read no messages. Otherwise, after receiving the first message, - we poll for more messages. We receive with a timeout of 0 to - effect a poll, so ERR is MACH_RCV_TIMED_OUT when the poll finds no - message waiting. */ - err = 0; - - if (got) - /* At least one descriptor is known to be ready now, so we will - return success. */ - err = 0; - } - - if (firstfd != -1) - for (i = firstfd; i <= lastfd; ++i) - if (d[i].type) - __mach_port_destroy (__mach_task_self (), d[i].reply_port); - if (firstfd == -1 || (firstfd != lastfd && portset != MACH_PORT_NULL)) - /* Destroy PORTSET, but only if it's not actually the reply port for a - single descriptor (in which case it's destroyed in the previous loop; - not doing it here is just a bit more efficient). */ - __mach_port_destroy (__mach_task_self (), portset); - - if (err) - return __hurd_fail (err); - - /* Below we recalculate GOT to include an increment for each operation - allowed on each fd. */ - got = 0; - - /* Set the user bitarrays. We only ever have to clear bits, as all desired - ones are initially set. */ - if (firstfd != -1) - for (i = firstfd; i <= lastfd; ++i) - { - int type = d[i].type; - - if ((type & SELECT_RETURNED) == 0) - type = 0; - - if (type & SELECT_READ) - got++; - else if (readfds) - FD_CLR (i, readfds); - if (type & SELECT_WRITE) - got++; - else if (writefds) - FD_CLR (i, writefds); - if (type & SELECT_URG) - got++; - else if (exceptfds) - FD_CLR (i, exceptfds); - } + to = NULL; - return got; + return _hurd_select (nfds, NULL, readfds, writefds, exceptfds, to, NULL); } weak_alias (__select, select) |