diff options
Diffstat (limited to 'libc/unistd/pselect.c')
-rw-r--r-- | libc/unistd/pselect.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/libc/unistd/pselect.c b/libc/unistd/pselect.c new file mode 100644 index 0000000..76ce2c0 --- /dev/null +++ b/libc/unistd/pselect.c @@ -0,0 +1,59 @@ +/* + * Copyright (C) 2008 The Android Open Source Project + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ +#include <sys/select.h> +#include <signal.h> +#include <pthread.h> + +int +pselect(int n, fd_set* readfds, fd_set* writefds, fd_set* errfds, + const struct timespec* timeout, const sigset_t* sigmask) +{ + sigset_t oldmask; + int result; + struct timeval tv, *tv_timeout = NULL; + + if (sigmask != NULL) + pthread_sigmask( SIG_SETMASK, sigmask, &oldmask ); + + if (timeout != NULL) { + tv_timeout = &tv; + tv.tv_sec = timeout->tv_sec; + tv.tv_usec = (timeout->tv_nsec + 999)/1000; // round up + if (tv.tv_usec >= 1000000) { + tv.tv_sec += 1; + tv.tv_usec -= 1000000; + } + } + + result = select( n, readfds, writefds, errfds, tv_timeout ); + + if (sigmask != NULL) + pthread_sigmask( SIG_SETMASK, &oldmask, NULL ); + + return result; +} |