diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/poll.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/poll.c | 50 |
1 files changed, 40 insertions, 10 deletions
diff --git a/sysdeps/unix/sysv/linux/poll.c b/sysdeps/unix/sysv/linux/poll.c index 296893d4ca..c136c21dbd 100644 --- a/sysdeps/unix/sysv/linux/poll.c +++ b/sysdeps/unix/sysv/linux/poll.c @@ -20,7 +20,7 @@ #include <errno.h> #include <sys/poll.h> -#include <sysdep.h> +#include <sysdep-cancel.h> #include <sys/syscall.h> #include <bp-checks.h> @@ -36,20 +36,19 @@ static int __emulate_poll (struct pollfd *fds, nfds_t nfds, int timeout) internal_function; # endif -/* The real implementation. */ -int -__poll (fds, nfds, timeout) - struct pollfd *fds; - nfds_t nfds; - int timeout; -{ + # if __ASSUME_POLL_SYSCALL == 0 +/* For loser kernels. */ +static int +loser_poll (struct pollfd *fds, nfds_t nfds, int timeout) +{ static int must_emulate; if (!must_emulate) { int errno_saved = errno; - int retval = INLINE_SYSCALL (poll, 3, CHECK_N (fds, nfds), nfds, timeout); + int retval = INLINE_SYSCALL (poll, 3, CHECK_N (fds, nfds), nfds, + timeout); if (retval >= 0 || errno != ENOSYS) return retval; @@ -59,8 +58,39 @@ __poll (fds, nfds, timeout) } return __emulate_poll (fds, nfds, timeout); +} +# endif + + +/* The real implementation. */ +int +__poll (fds, nfds, timeout) + struct pollfd *fds; + nfds_t nfds; + int timeout; +{ +# if __ASSUME_POLL_SYSCALL == 0 + if (SINGLE_THREAD_P) + return loser_poll (CHECK_N (fds, nfds), nfds, timeout); + + int oldtype = LIBC_CANCEL_ASYNC (); + + int result = loser_poll (CHECK_N (fds, nfds), nfds, timeout); + + LIBC_CANCEL_RESET (oldtype); + + return result; # else - return INLINE_SYSCALL (poll, 3, CHECK_N (fds, nfds), nfds, timeout); + if (SINGLE_THREAD_P) + return INLINE_SYSCALL (poll, 3, CHECK_N (fds, nfds), nfds, timeout); + + int oldtype = LIBC_CANCEL_ASYNC (); + + int result = INLINE_SYSCALL (poll, 3, CHECK_N (fds, nfds), nfds, timeout); + + LIBC_CANCEL_RESET (oldtype); + + return result; # endif } libc_hidden_def (__poll) |