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authorJoakim Tjernlund <joakim.tjernlund@transmode.se>2007-10-23 11:47:01 +0000
committerJoakim Tjernlund <joakim.tjernlund@transmode.se>2007-10-23 11:47:01 +0000
commit7340d67f42488a315c0dd1b892d7c5e528c766d0 (patch)
tree9bed9c41791c47647b28dd5be3e5457a8cbe5f5b /libc/sysdeps/linux
parent77b4b9f9b6277e21af26bd80cdaf3924f818d7a0 (diff)
Poll with zero timeout
Jean-Christian de Rivaz writes: The attached patch solve an issue I faced while using the libdbus-glib waiting for a D-Bus message or the end of a glib timer at the same time. This specific case of use generate a poll call with a zero timeout. On platformes with the glibc a zero timeout poll return immetiately even if there is no file descriptor event. But on platformes with uClibc a zero timeout poll block until a file descriptor event occurs.
Diffstat (limited to 'libc/sysdeps/linux')
-rw-r--r--libc/sysdeps/linux/common/poll.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/common/poll.c b/libc/sysdeps/linux/common/poll.c
index 4fc5a3267..47eb87d73 100644
--- a/libc/sysdeps/linux/common/poll.c
+++ b/libc/sysdeps/linux/common/poll.c
@@ -38,6 +38,10 @@ int __libc_poll(struct pollfd *fds, nfds_t nfds, int timeout)
tval.tv_sec = timeout / 1000;
tval.tv_nsec = (timeout % 1000) * 1000000;
ts = &tval;
+ } else if (timeout == 0) {
+ tval.tv_sec = 0;
+ tval.tv_nsec = 0;
+ ts = &tval;
}
return ppoll(fds, nfds, ts, NULL);
}