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Annotation of embedaddon/lighttpd/src/fdevent_select.c, revision 1.1.1.1

1.1       misho       1: #include "fdevent.h"
                      2: #include "buffer.h"
                      3: #include "log.h"
                      4: 
                      5: #include <sys/time.h>
                      6: #include <sys/types.h>
                      7: 
                      8: #include <unistd.h>
                      9: #include <stdlib.h>
                     10: #include <string.h>
                     11: #include <errno.h>
                     12: #include <signal.h>
                     13: #include <fcntl.h>
                     14: #include <assert.h>
                     15: 
                     16: #ifdef USE_SELECT
                     17: 
                     18: static int fdevent_select_reset(fdevents *ev) {
                     19:        FD_ZERO(&(ev->select_set_read));
                     20:        FD_ZERO(&(ev->select_set_write));
                     21:        FD_ZERO(&(ev->select_set_error));
                     22:        ev->select_max_fd = -1;
                     23: 
                     24:        return 0;
                     25: }
                     26: 
                     27: static int fdevent_select_event_del(fdevents *ev, int fde_ndx, int fd) {
                     28:        if (fde_ndx < 0) return -1;
                     29: 
                     30:        FD_CLR(fd, &(ev->select_set_read));
                     31:        FD_CLR(fd, &(ev->select_set_write));
                     32:        FD_CLR(fd, &(ev->select_set_error));
                     33: 
                     34:        return -1;
                     35: }
                     36: 
                     37: static int fdevent_select_event_set(fdevents *ev, int fde_ndx, int fd, int events) {
                     38:        UNUSED(fde_ndx);
                     39: 
                     40:        /* we should be protected by max-fds, but you never know */
                     41:        assert(fd < ((int)FD_SETSIZE));
                     42: 
                     43:        if (events & FDEVENT_IN) {
                     44:                FD_SET(fd, &(ev->select_set_read));
                     45:        } else {
                     46:                FD_CLR(fd, &(ev->select_set_read));
                     47:        }
                     48:        if (events & FDEVENT_OUT) {
                     49:                FD_SET(fd, &(ev->select_set_write));
                     50:        } else {
                     51:                FD_CLR(fd, &(ev->select_set_write));
                     52:        }
                     53:        FD_SET(fd, &(ev->select_set_error));
                     54: 
                     55:        if (fd > ev->select_max_fd) ev->select_max_fd = fd;
                     56: 
                     57:        return fd;
                     58: }
                     59: 
                     60: static int fdevent_select_poll(fdevents *ev, int timeout_ms) {
                     61:        struct timeval tv;
                     62: 
                     63:        tv.tv_sec =  timeout_ms / 1000;
                     64:        tv.tv_usec = (timeout_ms % 1000) * 1000;
                     65: 
                     66:        ev->select_read = ev->select_set_read;
                     67:        ev->select_write = ev->select_set_write;
                     68:        ev->select_error = ev->select_set_error;
                     69: 
                     70:        return select(ev->select_max_fd + 1, &(ev->select_read), &(ev->select_write), &(ev->select_error), &tv);
                     71: }
                     72: 
                     73: static int fdevent_select_event_get_revent(fdevents *ev, size_t ndx) {
                     74:        int revents = 0;
                     75: 
                     76:        if (FD_ISSET(ndx, &(ev->select_read))) {
                     77:                revents |= FDEVENT_IN;
                     78:        }
                     79:        if (FD_ISSET(ndx, &(ev->select_write))) {
                     80:                revents |= FDEVENT_OUT;
                     81:        }
                     82:        if (FD_ISSET(ndx, &(ev->select_error))) {
                     83:                revents |= FDEVENT_ERR;
                     84:        }
                     85: 
                     86:        return revents;
                     87: }
                     88: 
                     89: static int fdevent_select_event_get_fd(fdevents *ev, size_t ndx) {
                     90:        UNUSED(ev);
                     91: 
                     92:        return ndx;
                     93: }
                     94: 
                     95: static int fdevent_select_event_next_fdndx(fdevents *ev, int ndx) {
                     96:        int i;
                     97: 
                     98:        i = (ndx < 0) ? 0 : ndx + 1;
                     99: 
                    100:        for (; i < ev->select_max_fd + 1; i++) {
                    101:                if (FD_ISSET(i, &(ev->select_read))) return i;
                    102:                if (FD_ISSET(i, &(ev->select_write))) return i;
                    103:                if (FD_ISSET(i, &(ev->select_error))) return i;
                    104:        }
                    105: 
                    106:        return -1;
                    107: }
                    108: 
                    109: int fdevent_select_init(fdevents *ev) {
                    110:        ev->type = FDEVENT_HANDLER_SELECT;
                    111: #define SET(x) \
                    112:        ev->x = fdevent_select_##x;
                    113: 
                    114:        SET(reset);
                    115:        SET(poll);
                    116: 
                    117:        SET(event_del);
                    118:        SET(event_set);
                    119: 
                    120:        SET(event_next_fdndx);
                    121:        SET(event_get_fd);
                    122:        SET(event_get_revent);
                    123: 
                    124:        return 0;
                    125: }
                    126: 
                    127: #else
                    128: int fdevent_select_init(fdevents *ev) {
                    129:        UNUSED(ev);
                    130: 
                    131:        return -1;
                    132: }
                    133: #endif