d201fe46e3
adding (weak definitions to) stubs for some of the pthread functions. If the threads library is linked in, the real pthread functions will pulled in. Use the following convention for system calls wrapped by the threads library: __sys_foo - actual system call _foo - weak definition to __sys_foo foo - weak definition to __sys_foo Change all libc uses of system calls wrapped by the threads library from foo to _foo. In order to define the prototypes for _foo(), we introduce namespace.h and un-namespace.h (suggested by bde). All files that need to reference these system calls, should include namespace.h before any standard includes, then include un-namespace.h after the standard includes and before any local includes. <db.h> is an exception and shouldn't be included in between namespace.h and un-namespace.h namespace.h will define foo to _foo, and un-namespace.h will undefine foo. Try to eliminate some of the recursive calls to MT-safe functions in libc/stdio in preparation for adding a mutex to FILE. We have recursive mutexes, but would like to avoid using them if possible. Remove uneeded includes of <errno.h> from a few files. Add $FreeBSD$ to a few files in order to pass commitprep. Approved by: -arch
75 lines
2.4 KiB
C
75 lines
2.4 KiB
C
/*
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* Copyright 2000 Massachusetts Institute of Technology
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby
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* granted, provided that both the above copyright notice and this
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* permission notice appear in all copies, that both the above
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* copyright notice and this permission notice appear in all
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* supporting documentation, and that the name of M.I.T. not be used
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* in advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission. M.I.T. makes
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* no representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied
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* warranty.
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*
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* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
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* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
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* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include "namespace.h"
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#include <sys/select.h>
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#include <sys/time.h>
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#include <errno.h>
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#include <signal.h>
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#include "un-namespace.h"
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/*
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* Emulate the POSIX 1003.1g-2000 `pselect' interface. This is the
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* same as the traditional BSD `select' function, except that it uses
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* a timespec rather than a timeval, doesn't modify the timeout argument,
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* and allows the user to specify a signal mask to apply during the select.
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*/
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int
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pselect(int count, fd_set *rfds, fd_set *wfds, fd_set *efds,
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const struct timespec *timo, const sigset_t *mask)
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{
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sigset_t omask;
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struct timeval tvtimo, *tvp;
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int rv, sverrno;
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if (timo) {
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TIMESPEC_TO_TIMEVAL(&tvtimo, timo);
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tvp = &tvtimo;
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} else
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tvp = 0;
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if (mask != 0) {
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rv = _sigprocmask(SIG_SETMASK, mask, &omask);
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if (rv != 0)
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return rv;
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}
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rv = _select(count, rfds, wfds, efds, tvp);
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if (mask != 0) {
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sverrno = errno;
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_sigprocmask(SIG_SETMASK, &omask, (sigset_t *)0);
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errno = sverrno;
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}
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return rv;
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}
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