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author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2016-08-20 19:50:45 +0200 |
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committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2016-08-20 19:50:45 +0200 |
commit | 4dd9e35bfd35d3138bc44169baba098005bad51e (patch) | |
tree | a4939c43a9c3fe00eb27f023e14acc5e1fe8808c /sysdeps/unix/sysv/linux/generic/select.c | |
parent | bd42a4599d1b6f77bcfe1e4f67b7cbd9e1cb2dfd (diff) | |
parent | f76453c31593957fec1a99b986bfa5506618b79c (diff) |
Merge commit 'refs/top-bases/t/bigmem' into t/bigmem
Diffstat (limited to 'sysdeps/unix/sysv/linux/generic/select.c')
-rw-r--r-- | sysdeps/unix/sysv/linux/generic/select.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/generic/select.c b/sysdeps/unix/sysv/linux/generic/select.c new file mode 100644 index 0000000000..f7f1e18d4d --- /dev/null +++ b/sysdeps/unix/sysv/linux/generic/select.c @@ -0,0 +1,62 @@ +/* Copyright (C) 2011-2015 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <http://www.gnu.org/licenses/>. */ + +#include <sys/time.h> +#include <sys/types.h> +#include <sys/select.h> +#include <errno.h> +#include <sysdep-cancel.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. Returns the number of ready + descriptors, or -1 for errors. */ + +int +__select(int nfds, fd_set *readfds, + fd_set *writefds, fd_set *exceptfds, + struct timeval *timeout) +{ + int result; + struct timespec ts, *tsp = NULL; + + if (timeout) + { + TIMEVAL_TO_TIMESPEC (timeout, &ts); + tsp = &ts; + } + + result = SYSCALL_CANCEL (pselect6, nfds, readfds, writefds, exceptfds, tsp, + NULL); + + if (timeout) + { + /* Linux by default will update the timeout after a pselect6 syscall + (though the pselect() glibc call suppresses this behavior). + Since select() on Linux has the same behavior as the pselect6 + syscall, we update the timeout here. */ + TIMESPEC_TO_TIMEVAL (timeout, &ts); + } + + return result; +} +libc_hidden_def (__select) + +weak_alias (__select, select) +weak_alias (__select, __libc_select) |