void Input_loop(void)
{
int rfds,
tfds,
max,
n,
netfd,
result,
clientfd;
struct timeval tv;
if ((result = Net_input()) == -1) {
error("Bad server input");
return;
}
if (Client_input(2) == -1) {
return;
}
if (Net_flush() == -1) {
return;
}
if ((clientfd = Client_fd()) == -1) {
error("Bad client filedescriptor");
return;
}
if ((netfd = Net_fd()) == -1) {
error("Bad socket filedescriptor");
return;
}
rfds = 0;
rfds |= (1 << clientfd);
rfds |= (1 << netfd);
max = (clientfd > netfd) ? clientfd : netfd;
for (tfds = rfds; ; rfds = tfds) {
if (scoresChanged != 0 && ++scoresChanged > SCORE_UPDATE_DELAY
|| result > 1) {
if (scoresChanged > 2 * SCORE_UPDATE_DELAY) {
Client_score_table();
tv.tv_sec = 10;
tv.tv_usec = 0;
} else {
tv.tv_sec = 0;
tv.tv_usec = 0;
}
} else {
tv.tv_sec = 10;
tv.tv_usec = 0;
}
if ((n = select(max + 1, (fd_set *)&rfds, NULL, NULL, &tv)) == -1) {
if (errno == EINTR) {
continue;
}
error("Select failed");
return;
}
if (n == 0) {
if (scoresChanged > SCORE_UPDATE_DELAY) {
Client_score_table();
if (Client_input(2) == -1) {
return;
}
continue;
}
else if (result <= 1) {
errno = 0;
error("No response from server");
continue;
}
}
if ((rfds & (1 << clientfd)) != 0) {
if (Client_input(1) == -1) {
return;
}
if (Net_flush() == -1) {
error("Bad net flush after X input");
return;
}
}
if ((rfds & (1 << netfd)) != 0 || result > 1) {
if ((result = Net_input()) == -1) {
error("Bad net input");
return;
}
if (result > 0) {
/*
* Now there's a frame being drawn by the X server.
* So we shouldn't try to send more drawing
* requests to the X server or it might get
* overloaded which could cause problems with
* keyboard input. Besides, we wouldn't even want
* to send more drawing requests because there
* may arive a more recent frame update soon
* and using the CPU now may even slow down the X server
* if it is running on the same CPU.
* So we only check if the X server has sent any more
* keyboard events and then we wait until the X server
* has finished the drawing of our current frame.
*/
if (Client_input(1) == -1) {
return;
}
if (Net_flush() == -1) {
error("Bad net flush before sync");
return;
}
Client_sync();
if (Client_input(1) == -1) {
return;
}
}
}
}
}
/*
* This is a Game_loop that uses X specific hacks to improve
* responsiveness. Basically it uses the same mechanism as the
* X client to listen to network and user input.
*/
void Game_loop(void)
{
fd_set rfds, tfds;
int max, n, netfd, result, clientfd;
struct timeval tv;
SDL_SysWMinfo info;
SDL_VERSION(&info.version);
if (!SDL_GetWMInfo(&info)) {
error("SDL_GetWMInfo not supported");
return;
}
if ((result = Net_input()) == -1) {
error("Bad server input");
return;
}
if (Poll_input())
return;
if (Net_flush() == -1)
return;
if ((clientfd = ConnectionNumber(info.info.x11.display)) == -1) {
error("Bad client filedescriptor");
return;
}
if ((netfd = Net_fd()) == -1) {
error("Bad socket filedescriptor");
return;
}
Net_key_change();
FD_ZERO(&rfds);
FD_SET(clientfd, &rfds);
FD_SET(netfd, &rfds);
max = (clientfd > netfd) ? clientfd : netfd;
for (tfds = rfds; ; rfds = tfds) {
tv.tv_sec = 1;
tv.tv_usec = 0;
if (maxMouseTurnsPS > 0) {
int t = Client_check_pointer_move_interval();
assert(t > 0);
tv.tv_sec = t / 1000000;
tv.tv_usec = t % 1000000;
}
if ((n = select(max + 1, &rfds, NULL, NULL, &tv)) == -1) {
if (errno == EINTR)
continue;
error("Select failed");
return;
}
if (n == 0) {
if (maxMouseTurnsPS > 0 &&
cumulativeMouseMovement != 0)
continue;
if (result <= 1) {
warn("No response from server");
continue;
}
}
if (FD_ISSET(clientfd, &rfds)) {
if (Poll_input())
return;
if (Net_flush() == -1) {
error("Bad net flush after input");
return;
}
}
if (FD_ISSET(netfd, &rfds) || result > 1) {
if ((result = Net_input()) == -1) {
warn("Bad net input. Have a nice day!");
return;
}
if (result > 0) {
if (Poll_input())
return;
if (Net_flush() == -1) {
error("Bad net flush");
return;
}
if (Poll_input())
return;
}
}
}
}
