aboutsummaryrefslogtreecommitdiff
path: root/io
diff options
context:
space:
mode:
Diffstat (limited to 'io')
-rw-r--r--io/Makefile3
-rw-r--r--io/Versions2
-rw-r--r--io/ppoll.c76
-rw-r--r--io/sys/poll.h21
4 files changed, 100 insertions, 2 deletions
diff --git a/io/Makefile b/io/Makefile
index 5e6d72e..e005cb3 100644
--- a/io/Makefile
+++ b/io/Makefile
@@ -48,7 +48,7 @@ routines := \
ttyname ttyname_r isatty \
link linkat symlink symlinkat readlink readlinkat \
unlink unlinkat rmdir \
- ftw ftw64 fts poll \
+ ftw ftw64 fts poll ppoll \
posix_fadvise posix_fadvise64 \
posix_fallocate posix_fallocate64 \
sendfile sendfile64
@@ -72,6 +72,7 @@ include ../Rules
CFLAGS-fcntl.c = -fexceptions -fasynchronous-unwind-tables
CFLAGS-poll.c = -fexceptions -fasynchronous-unwind-tables
+CFLAGS-ppoll.c = -fexceptions -fasynchronous-unwind-tables
CFLAGS-lockf.c = -fexceptions
CFLAGS-statfs.c = -fexceptions
CFLAGS-fstatfs.c = -fexceptions
diff --git a/io/Versions b/io/Versions
index 16006a8..bc9c9d2 100644
--- a/io/Versions
+++ b/io/Versions
@@ -110,5 +110,7 @@ libc {
readlinkat;
symlinkat;
unlinkat;
+
+ ppoll;
}
}
diff --git a/io/ppoll.c b/io/ppoll.c
new file mode 100644
index 0000000..a035cfe
--- /dev/null
+++ b/io/ppoll.c
@@ -0,0 +1,76 @@
+/* Copyright (C) 2006 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2006.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <errno.h>
+#include <limits.h>
+#include <signal.h>
+#include <stddef.h> /* For NULL. */
+#include <sys/poll.h>
+#include <sysdep-cancel.h>
+
+
+int
+ppoll (struct pollfd *fds, nfds_t nfds, const struct timespec *timeout,
+ const sigset_t *sigmask)
+{
+ int tval = -1;
+
+ /* poll uses a simple millisecond value. Convert it. */
+ if (timeout != NULL)
+ {
+ if (timeout->tv_sec < 0
+ || timeout->tv_nsec < 0 || timeout->tv_nsec >= 1000000000)
+ {
+ __set_errno (EINVAL);
+ return -1;
+ }
+
+ if (timeout->tv_sec > INT_MAX / 1000
+ || (timeout->tv_sec == INT_MAX / 1000
+ && ((timeout->tv_nsec + 999999) / 1000000 > INT_MAX % 1000)))
+ /* We cannot represent the timeout in an int value. Wait
+ forever. */
+ tval = -1;
+ else
+ tval = (timeout->tv_sec * 1000
+ + (timeout->tv_nsec + 999999) / 1000000);
+ }
+
+ /* The setting and restoring of the signal mask and the select call
+ should be an atomic operation. This can't be done without kernel
+ help. */
+ sigset_t savemask;
+ if (sigmask != NULL)
+ __sigprocmask (SIG_SETMASK, sigmask, &savemask);
+
+ /* Note the ppoll() is a cancellation point. But since we call
+ poll() which itself is a cancellation point we do not have
+ to do anything here. */
+ int retval = __poll (fds, nfds, tval);
+
+ if (sigmask != NULL)
+ __sigprocmask (SIG_SETMASK, &savemask, NULL);
+
+ return retval;
+}
+
+#ifndef ppoll
+/* __poll handles cancellation. */
+LIBC_CANCEL_HANDLED ();
+#endif
diff --git a/io/sys/poll.h b/io/sys/poll.h
index 9cf1b9f..4085b78 100644
--- a/io/sys/poll.h
+++ b/io/sys/poll.h
@@ -1,5 +1,5 @@
/* Compatibility definitions for System V `poll' interface.
- Copyright (C) 1994,1996-2001,2004,2005 Free Software Foundation, Inc.
+ Copyright (C) 1994,1996-2001,2004,2005,2006 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
@@ -24,6 +24,13 @@
/* Get the platform dependent bits of `poll'. */
#include <bits/poll.h>
+#ifdef __USE_GNU
+/* Get the __sigset_t definition. */
+# include <bits/sigset.h>
+/* Get the timespec definition. */
+# define __need_timespec
+# include <time.h>
+#endif
/* Type used for the number of file descriptors. */
@@ -50,6 +57,18 @@ __BEGIN_DECLS
__THROW. */
extern int poll (struct pollfd *__fds, nfds_t __nfds, int __timeout);
+#ifdef __USE_GNU
+/* Like poll, but before waiting the threads signal mask is replaced
+ with that specified in the fourth parameter. For better usability,
+ the timeout value is specified using a TIMESPEC object.
+
+ This function is a cancellation point and therefore not marked with
+ __THROW. */
+extern int ppoll (struct pollfd *__fds, nfds_t __nfds,
+ __const struct timespec *__timeout,
+ __const __sigset_t *__ss);
+#endif
+
__END_DECLS
#endif /* sys/poll.h */