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