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lighttpd 1.4.41

    1: #include "first.h"
    2: 
    3: #include "fdevent.h"
    4: #include "buffer.h"
    5: #include "log.h"
    6: 
    7: #include <sys/time.h>
    8: #include <sys/types.h>
    9: 
   10: #include <unistd.h>
   11: #include <stdlib.h>
   12: #include <string.h>
   13: #include <errno.h>
   14: #include <signal.h>
   15: #include <fcntl.h>
   16: #include <assert.h>
   17: 
   18: #ifdef USE_SELECT
   19: 
   20: static int fdevent_select_reset(fdevents *ev) {
   21: 	FD_ZERO(&(ev->select_set_read));
   22: 	FD_ZERO(&(ev->select_set_write));
   23: 	FD_ZERO(&(ev->select_set_error));
   24: 	ev->select_max_fd = -1;
   25: 
   26: 	return 0;
   27: }
   28: 
   29: static int fdevent_select_event_del(fdevents *ev, int fde_ndx, int fd) {
   30: 	if (fde_ndx < 0) return -1;
   31: 
   32: 	FD_CLR(fd, &(ev->select_set_read));
   33: 	FD_CLR(fd, &(ev->select_set_write));
   34: 	FD_CLR(fd, &(ev->select_set_error));
   35: 
   36: 	return -1;
   37: }
   38: 
   39: static int fdevent_select_event_set(fdevents *ev, int fde_ndx, int fd, int events) {
   40: 	UNUSED(fde_ndx);
   41: 
   42: 	/* we should be protected by max-fds, but you never know */
   43: 	force_assert(fd < ((int)FD_SETSIZE));
   44: 
   45: 	if (events & FDEVENT_IN) {
   46: 		FD_SET(fd, &(ev->select_set_read));
   47: 	} else {
   48: 		FD_CLR(fd, &(ev->select_set_read));
   49: 	}
   50: 	if (events & FDEVENT_OUT) {
   51: 		FD_SET(fd, &(ev->select_set_write));
   52: 	} else {
   53: 		FD_CLR(fd, &(ev->select_set_write));
   54: 	}
   55: 	FD_SET(fd, &(ev->select_set_error));
   56: 
   57: 	if (fd > ev->select_max_fd) ev->select_max_fd = fd;
   58: 
   59: 	return fd;
   60: }
   61: 
   62: static int fdevent_select_poll(fdevents *ev, int timeout_ms) {
   63: 	struct timeval tv;
   64: 
   65: 	tv.tv_sec =  timeout_ms / 1000;
   66: 	tv.tv_usec = (timeout_ms % 1000) * 1000;
   67: 
   68: 	ev->select_read = ev->select_set_read;
   69: 	ev->select_write = ev->select_set_write;
   70: 	ev->select_error = ev->select_set_error;
   71: 
   72: 	return select(ev->select_max_fd + 1, &(ev->select_read), &(ev->select_write), &(ev->select_error), &tv);
   73: }
   74: 
   75: static int fdevent_select_event_get_revent(fdevents *ev, size_t ndx) {
   76: 	int revents = 0;
   77: 
   78: 	if (FD_ISSET(ndx, &(ev->select_read))) {
   79: 		revents |= FDEVENT_IN;
   80: 	}
   81: 	if (FD_ISSET(ndx, &(ev->select_write))) {
   82: 		revents |= FDEVENT_OUT;
   83: 	}
   84: 	if (FD_ISSET(ndx, &(ev->select_error))) {
   85: 		revents |= FDEVENT_ERR;
   86: 	}
   87: 
   88: 	return revents;
   89: }
   90: 
   91: static int fdevent_select_event_get_fd(fdevents *ev, size_t ndx) {
   92: 	UNUSED(ev);
   93: 
   94: 	return ndx;
   95: }
   96: 
   97: static int fdevent_select_event_next_fdndx(fdevents *ev, int ndx) {
   98: 	int i;
   99: 
  100: 	i = (ndx < 0) ? 0 : ndx + 1;
  101: 
  102: 	for (; i < ev->select_max_fd + 1; i++) {
  103: 		if (FD_ISSET(i, &(ev->select_read))) return i;
  104: 		if (FD_ISSET(i, &(ev->select_write))) return i;
  105: 		if (FD_ISSET(i, &(ev->select_error))) return i;
  106: 	}
  107: 
  108: 	return -1;
  109: }
  110: 
  111: int fdevent_select_init(fdevents *ev) {
  112: 	ev->type = FDEVENT_HANDLER_SELECT;
  113: #define SET(x) \
  114: 	ev->x = fdevent_select_##x;
  115: 
  116: 	SET(reset);
  117: 	SET(poll);
  118: 
  119: 	SET(event_del);
  120: 	SET(event_set);
  121: 
  122: 	SET(event_next_fdndx);
  123: 	SET(event_get_fd);
  124: 	SET(event_get_revent);
  125: 
  126: 	return 0;
  127: }
  128: 
  129: #else
  130: int fdevent_select_init(fdevents *ev) {
  131: 	UNUSED(ev);
  132: 
  133: 	return -1;
  134: }
  135: #endif