/* vi: set sw=4 ts=4: */ /* * select() for uClibc * * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org> * * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. */ #include <sys/syscall.h> #include <sys/select.h> #include <stdint.h> #ifdef __UCLIBC_HAS_THREADS_NATIVE__ #include <sysdep-cancel.h> #else #define SINGLE_THREAD_P 1 #endif #define USEC_PER_SEC 1000000L extern __typeof(select) __libc_select; #if !defined(__NR__newselect) && !defined(__NR_select) && defined __USE_XOPEN2K # define __NR___libc_pselect6 __NR_pselect6 static _syscall6(int, __libc_pselect6, int, n, fd_set *, readfds, fd_set *, writefds, fd_set *, exceptfds, const struct timespec *, timeout, const sigset_t *, sigmask) int __libc_select(int n, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout) { struct timespec _ts, *ts = 0; if (timeout) { uint32_t usec; _ts.tv_sec = timeout->tv_sec; /* GNU extension: allow for timespec values where the sub-sec * field is equal to or more than 1 second. The kernel will * reject this on us, so take care of the time shift ourself. * Some applications (like readline and linphone) do this. * See 'clarification on select() type calls and invalid timeouts' * on the POSIX general list for more information. */ usec = timeout->tv_usec; if (usec >= USEC_PER_SEC) { _ts.tv_sec += usec / USEC_PER_SEC; usec %= USEC_PER_SEC; } _ts.tv_nsec = usec * 1000; ts = &_ts; } if (SINGLE_THREAD_P) return __libc_pselect6(n, readfds, writefds, exceptfds, ts, 0); #ifdef __UCLIBC_HAS_THREADS_NATIVE__ int oldtype = LIBC_CANCEL_ASYNC (); int result = __libc_pselect6(n, readfds, writefds, exceptfds, ts, 0); LIBC_CANCEL_RESET (oldtype); return result; #endif } #else #ifdef __NR__newselect # define __NR___syscall_select __NR__newselect #else # define __NR___syscall_select __NR_select #endif static _syscall5(int, __syscall_select, int, n, fd_set *, readfds, fd_set *, writefds, fd_set *, exceptfds, struct timeval *, timeout); int __libc_select(int n, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout) { if (SINGLE_THREAD_P) return __syscall_select(n, readfds, writefds, exceptfds, timeout); #ifdef __UCLIBC_HAS_THREADS_NATIVE__ int oldtype = LIBC_CANCEL_ASYNC (); int result = __syscall_select(n, readfds, writefds, exceptfds, timeout); LIBC_CANCEL_RESET (oldtype); return result; #endif } #endif weak_alias(__libc_select,select) libc_hidden_weak(select)