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,
49                            struct waitset *ws_store[][maxfdp1],
54 static int update_waitset(int maxfdp1, fd_set *readfds, fd_set *writefds,
56                           struct waitset *ws_store[][maxfdp1],
76 int select(int maxfdp1, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
83     debug_print_fdsets(maxfdp1, readfds, writefds, exceptfds);
107      * FD_ISSET(changed_read_ws, maxfdp1) indicates whether or not we changed the
119     struct waitset *ws_store[2][maxfdp1];
121     /* check validity of maxfdp1 */
122     if (maxfdp1 < MIN_FD || maxfdp1 > MAX_FD || maxfdp1 > FD_SETSIZE) {
155     retfds = check_fds(maxfdp1, 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,
229     if (FD_ISSET(maxfdp1, changed_ws[READ_SLOT])) {
231         err = mb->change_waitset(mb, ws_store[READ_SLOT][maxfdp1]);
238     for (int fd = 0; fd < maxfdp1; fd++) {
303     for (int fd = 0; fd < maxfdp1; fd++) {
375     debug_print_fdsets(maxfdp1, readfds, writefds, exceptfds);
385  * \param maxfdp1   Maximum file descriptor in all sets + 1.
400 static int check_fds(int maxfdp1, fd_set *readfds, fd_set *writefds,
411         for (int fd = 0; fd < maxfdp1; fd++) {
490          for (int fd = 0; fd < maxfdp1; fd++) {
580  * \param maxfdp1    Maximum file descriptor in all sets +1.
592 static int pack_on_waitset(int maxfdp1, fd_set *readfds, fd_set *writefds,
594                            struct waitset *ws_store[][maxfdp1],
606         for (int fd = 0; fd < maxfdp1; fd++) {
651                                 FD_SET(maxfdp1, changed_ws[READ_SLOT]);
678                             FD_SET(maxfdp1, changed_ws[READ_SLOT]);
695                             FD_SET(maxfdp1, changed_ws[READ_SLOT]);
715          for (int fd = 0; fd < maxfdp1; fd++) {
747                             FD_SET(maxfdp1, changed_ws[READ_SLOT]);
782                             FD_SET(maxfdp1, changed_ws[READ_SLOT]);
799                             FD_SET(maxfdp1, changed_ws[READ_SLOT]);
818     if (FD_ISSET(maxfdp1, changed_ws[READ_SLOT])) {
820         ws_store[READ_SLOT][maxfdp1] = monitor_ws;
852  * \param maxfdp1    Maximum file descriptor in all sets +1.
864 static int update_waitset(int maxfdp1, fd_set *readfds, fd_set *writefds,
866                           struct waitset *ws_store[][maxfdp1],
873         for (int fd = 0; fd < maxfdp1; fd++) {
931         for (int fd = 0; fd < maxfdp1; fd++) {
1011 static void debug_fdset_to_string(char *str, size_t size, int maxfdp1,
1029     for (int fd = 0; fd < maxfdp1; fd++) {
1077 static inline void debug_fdset_to_string(char *str, size_t size, int maxfdp1,
1085 static void debug_print_fdsets(int maxfdp1, fd_set *readfds, fd_set *writefds,
1091     debug_fdset_to_string(rbuffer, PRINT_BUFSZ, maxfdp1, readfds);
1092     debug_fdset_to_string(wbuffer, PRINT_BUFSZ, maxfdp1, writefds);
1093     debug_fdset_to_string(ebuffer, PRINT_BUFSZ, maxfdp1, exceptfds);
1098 static inline void debug_print_fdsets(int maxfdp1, fd_set *readfds,