lib/posixcompat/select.c

39 static int check_fds(int maxfdp1, fd_set *readfds, fd_set *writefds,
42 static void debug_print_fdsets(int maxfdp1, fd_set *readfds, fd_set *writefds,
47 static int pack_on_waitset(int maxfdp1, fd_set *readfds, fd_set *writefds,
54 static int update_waitset(int maxfdp1, fd_set *readfds, fd_set *writefds,
59 static inline void zero_fdsets(fd_set *readfds, fd_set *writefds,
70  * any of the fds associated with the readfds, writefds and exceptfds is ready
76 int select(int maxfdp1, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
83     debug_print_fdsets(maxfdp1, readfds, writefds, exceptfds);
155     retfds = check_fds(maxfdp1, readfds, writefds, exceptfds);
171         zero_fdsets(readfds, writefds, exceptfds);
184     ret = pack_on_waitset(maxfdp1, readfds, writefds, exceptfds, changed_ws,
200         retfds = check_fds(maxfdp1, readfds, writefds, exceptfds);
208             ret = update_waitset(maxfdp1, readfds, writefds, exceptfds,
222             zero_fdsets(readfds, writefds, exceptfds);
375     debug_print_fdsets(maxfdp1, readfds, writefds, exceptfds);
388  * \param writefds  The set of file descriptors to be checked for being ready
400 static int check_fds(int maxfdp1, fd_set *readfds, fd_set *writefds,
488     /* Check list of writefds for events */
489     if (writefds != NULL) {
491             if (FD_ISSET(fd, writefds)) {
566         if (writefds != NULL) {
567             memcpy(writefds, &owritefds, sizeof(fd_set));
582  * \param writefds   write FD set
592 static int pack_on_waitset(int maxfdp1, fd_set *readfds, fd_set *writefds,
713     /* go through writefds and change waitsets */
714     if (writefds != NULL) {
716             if (FD_ISSET(fd, writefds)) {
854  * \param writefds   write FD set
864 static int update_waitset(int maxfdp1, fd_set *readfds, fd_set *writefds,
929     /* go through writefds and update waitsets if necessary. */
930     if (writefds != NULL) {
932             if (FD_ISSET(fd, writefds)) {
994 static inline void zero_fdsets(fd_set *readfds, fd_set *writefds,
1000     if (writefds != NULL) {
1001         FD_ZERO(writefds);
1085 static void debug_print_fdsets(int maxfdp1, fd_set *readfds, fd_set *writefds,
1092     debug_fdset_to_string(wbuffer, PRINT_BUFSZ, maxfdp1, writefds);
1094     SELECT_DEBUG("readfds %s | writefds %s | exceptfds %s\n", rbuffer, wbuffer,
1099                                      fd_set *writefds, fd_set *exceptfds)