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author | Richard Maw <richard.maw@codethink.co.uk> | 2012-01-17 14:43:55 +0000 |
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committer | Richard Maw <richard.maw@codethink.co.uk> | 2012-01-17 14:43:55 +0000 |
commit | 2de9abc5c9d40b3c716307d67d16146f823fd554 (patch) | |
tree | 6979db67934ddc8b564150b465846a383b428ff8 /gnulib/lib/pselect.c | |
parent | 33cc1c6fda6e72a7bae1401e9b2cec495a4d3ff1 (diff) | |
download | patch-baserock/bootstrap.tar.gz |
add the output of bootstrapbaserock/bootstrap-pass2baserock/bootstrap
Diffstat (limited to 'gnulib/lib/pselect.c')
m--------- | gnulib | 0 | ||||
-rw-r--r-- | gnulib/lib/pselect.c | 77 |
2 files changed, 77 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/lib/pselect.c b/gnulib/lib/pselect.c new file mode 100644 index 0000000..5b709a2 --- /dev/null +++ b/gnulib/lib/pselect.c @@ -0,0 +1,77 @@ +/* pselect - synchronous I/O multiplexing + + Copyright 2011 Free Software Foundation, Inc. + + This file is part of gnulib. + + 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, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + +/* written by Paul Eggert */ + +#include <config.h> + +#include <sys/select.h> + +#include <errno.h> +#include <signal.h> + +/* Examine the size-NFDS file descriptor sets in RFDS, WFDS, and XFDS + to see whether some of their descriptors are ready for reading, + ready for writing, or have exceptions pending. Wait for at most + TIMEOUT seconds, and use signal mask SIGMASK while waiting. A null + pointer parameter stands for no descriptors, an infinite timeout, + or an unaffected signal mask. */ + +int +pselect (int nfds, fd_set *restrict rfds, + fd_set *restrict wfds, fd_set *restrict xfds, + struct timespec const *restrict timeout, + sigset_t const *restrict sigmask) +{ + int select_result; + sigset_t origmask; + struct timeval tv, *tvp; + + if (timeout) + { + if (! (0 <= timeout->tv_nsec && timeout->tv_nsec < 1000000000)) + { + errno = EINVAL; + return -1; + } + + tv.tv_sec = timeout->tv_sec; + tv.tv_usec = (timeout->tv_nsec + 999) / 1000; + tvp = &tv; + } + else + tvp = NULL; + + /* Signal mask munging should be atomic, but this is the best we can + do in this emulation. */ + if (sigmask) + pthread_sigmask (SIG_SETMASK, sigmask, &origmask); + + select_result = select (nfds, rfds, wfds, xfds, tvp); + + if (sigmask) + { + int select_errno = errno; + pthread_sigmask (SIG_SETMASK, &origmask, NULL); + errno = select_errno; + } + + return select_result; +} |