static void
readyToEndCallback (NetConnection *conn, void *arg)
{
// This callback function gets called from inside the function that
// updates the frame counter, but this is not a problem as the
// ending frame count will at least be 1 greater than the current
// frame count.
BattleStateData *battleStateData;
battleStateData = (BattleStateData *) NetConnection_getStateData(conn);
#ifdef NETPLAY_DEBUG
fprintf (stderr, "Both sides are ready to end the battle; starting "
"end-of-battle synchronisation.\n");
#endif
NetConnection_setState (conn, NetState_endingBattle);
if (battleFrameCount + 1 > battleStateData->endFrameCount)
battleStateData->endFrameCount = battleFrameCount + 1;
Netplay_Notify_frameCount (conn, battleFrameCount + 1);
// The +1 is to ensure that after the remote side receives the
// frame count it will still receive one more frame data packet,
// so it will know in advance when the last frame data packet
// will come so it won't block. It also ensures that the
// local frame counter won't go past the sent number, which
// could happen when the function triggering the call to this
// function is the frame update function which might update
// the frame counter one more time.
flushPacketQueue (conn);
#ifdef NETPLAY_DEBUG
fprintf (stderr, "NETPLAY: [%d] ==> Sent battleFrameCount %d.\n",
NetConnection_getPlayerNr(conn), battleFrameCount + 1);
#endif
Netplay_localReady(conn, readyToEnd2Callback, NULL, false);
(void) arg;
}
/*
* When one player's ship dies, there's a delay before the next ship
* can be chosen. This time depends on the time the ditty is playing
* and may differ for each side.
* To synchronise the time, the following protocol is followed:
* 1. (NetState_inBattle) The Ready protocol is used to let either
* party know when they're ready to stop the battle.
* 2. (NetState_endingBattle) Each party sends the frame number of when
* it wants to end the battle, and continues until that point, where
* it waits until it has received the frame number of the other party.
* 3. After a player has both sent and received a frame count, the
* simulation continues for each party, until the maximum of both
* frame counts has been achieved.
* 4. The Ready protocol is used to let each side signal that it has
* reached the target frame count.
* 5. The battle ends.
*/
static bool
readyForBattleEndPlayer (NetConnection *conn)
{
BattleStateData *battleStateData;
battleStateData = (BattleStateData *) NetConnection_getStateData(conn);
if (NetConnection_getState (conn) == NetState_interBattle ||
NetConnection_getState (conn) == NetState_inSetup)
{
// This connection is already ready. The entire synchronisation
// protocol has already been done for this connection.
return true;
}
if (NetConnection_getState (conn) == NetState_inBattle)
{
if (Netplay_isLocalReady(conn))
{
// We've already sent notice that we are ready, but we're
// still waiting for the other side to say it's ready too.
return false;
}
// We haven't yet told the other side we're ready. We do so now.
Netplay_localReady (conn, readyToEndCallback, NULL, true);
// This may set the state to endingBattle.
if (NetConnection_getState (conn) == NetState_inBattle)
return false;
}
assert (NetConnection_getState (conn) == NetState_endingBattle ||
NetConnection_getState (conn) == NetState_endingBattle2);
// Keep the simulation going as long as the target frame count
// hasn't been reached yet. Note that if the connection state is
// NetState_endingBattle, then we haven't yet received the
// remote frame count, so the target frame count may still rise.
if (battleFrameCount < battleStateData->endFrameCount)
return false;
if (NetConnection_getState (conn) == NetState_endingBattle)
{
// We have reached the target frame count, but we don't know
// the remote target frame count yet. So we wait until it has
// come in.
waitReady (conn);
// TODO: check whether all connections are still connected.
assert (NetConnection_getState (conn) == NetState_endingBattle2);
// Continue the simulation if the battleFrameCount has gone up.
if (battleFrameCount < battleStateData->endFrameCount)
return false;
}
// We are ready and wait for the other party to become ready too.
negotiateReady (conn, true, NetState_interBattle);
return true;
}
// Post: the NetState for all players is NetState_interBattle
static BOOLEAN
GetMeleeStarShips (COUNT playerMask, HSTARSHIP *ships)
{
COUNT playerI;
BOOLEAN ok;
GETMELEE_STATE gmstate;
TimeCount now;
COUNT i;
#ifdef NETPLAY
for (playerI = 0; playerI < NUM_PLAYERS; playerI++)
{
NetConnection *conn;
if ((playerMask & (1 << playerI)) == 0)
continue;
// XXX: This does not have to be done per connection.
conn = netConnections[playerI];
if (conn != NULL) {
BattleStateData *battleStateData;
battleStateData =
(BattleStateData *) NetConnection_getStateData (conn);
battleStateData->getMeleeState = &gmstate;
}
}
#endif
ok = true;
now = GetTimeCounter ();
gmstate.InputFunc = DoGetMelee;
gmstate.Initialized = FALSE;
for (i = 0; i < NUM_PLAYERS; ++i)
{
// We have to use TFB_Random() results in specific order
playerI = GetPlayerOrder (i);
gmstate.player[playerI].selecting =
(playerMask & (1 << playerI)) != 0;
gmstate.player[playerI].ships_left = battle_counter[playerI];
// We determine in advance which ship would be chosen if the player
// wants a random ship, to keep it simple to keep network parties
// synchronised.
gmstate.player[playerI].randomIndex =
(COUNT)TFB_Random () % gmstate.player[playerI].ships_left;
gmstate.player[playerI].done = FALSE;
if (!gmstate.player[playerI].selecting)
continue;
gmstate.player[playerI].timeIn = now;
gmstate.player[playerI].row = 0;
gmstate.player[playerI].col = NUM_PICKMELEE_COLUMNS;
#ifdef NETPLAY
gmstate.player[playerI].remoteSelected = FALSE;
#endif
gmstate.player[playerI].flashContext =
Flash_createHighlight (ScreenContext, NULL);
Flash_setMergeFactors (gmstate.player[playerI].flashContext,
2, 3, 2);
Flash_setFrameTime (gmstate.player[playerI].flashContext,
ONE_SECOND / 16);
#ifdef NETPLAY
if (PlayerControl[playerI] & NETWORK_CONTROL)
Flash_setSpeed (gmstate.player[playerI].flashContext,
ONE_SECOND / 2, 0, ONE_SECOND / 2, 0);
else
#endif
{
Flash_setSpeed (gmstate.player[playerI].flashContext,
0, ONE_SECOND / 16, 0, ONE_SECOND / 16);
}
PickMelee_ChangedSelection (&gmstate, playerI);
Flash_start (gmstate.player[playerI].flashContext);
}
#ifdef NETPLAY
{
// NB. gmstate.player[].randomIndex and gmstate.player[].done must
// be initialised before negotiateReadyConnections is completed, to
// ensure that they are initialised when the SelectShip packet
// arrives.
bool allOk = negotiateReadyConnections (true, NetState_selectShip);
if (!allOk)
{
// Some network connection has been reset.
ok = false;
}
}
#endif
SetDefaultMenuRepeatDelay ();
SetContext (OffScreenContext);
DoInput (&gmstate, FALSE);
WaitForSoundEnd (0);
for (playerI = 0; playerI < NUM_PLAYERS; playerI++)
{
if (!gmstate.player[playerI].selecting)
continue;
if (gmstate.player[playerI].done)
{
// Flash rectangle is already terminated.
ships[playerI] = gmstate.player[playerI].hBattleShip;
}
else
{
Flash_terminate (gmstate.player[playerI].flashContext);
gmstate.player[playerI].flashContext = NULL;
ok = false;
}
}
#ifdef NETPLAY
if (ok)
{
if (!negotiateReadyConnections (true, NetState_interBattle))
ok = false;
}
else
setStateConnections (NetState_interBattle);
#endif
if (!ok)
{
// Aborting.
GLOBAL (CurrentActivity) &= ~IN_BATTLE;
}
#ifdef NETPLAY
for (playerI = 0; playerI < NUM_PLAYERS; playerI++)
{
NetConnection *conn;
if ((playerMask & (1 << playerI)) == 0)
continue;
// XXX: This does not have to be done per connection.
conn = netConnections[playerI];
if (conn != NULL && NetConnection_isConnected (conn))
{
BattleStateData *battleStateData;
battleStateData =
(BattleStateData *) NetConnection_getStateData (conn);
battleStateData->getMeleeState = NULL;
}
}
#endif
return ok;
}