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lighttpd 1.4.35

    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: 	force_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