sv_game.cpp

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/*
All original material Copyright (C) 2002-2022 UFO: Alien Invasion.
 
Original file from Quake 2 v3.21: quake2-2.31/server/sv_game.c
Copyright (C) 1997-2001 Id Software, Inc.
 
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 
See the GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/
 
#include "server.h"
#include "sv_log.h"
#include "../common/grid.h"
#include "../common/routing.h"
#include "../ports/system.h"
#include "../shared/thread.h"
#include "../shared/scopedmutex.h"
 
static void SV_dprintf (const char* fmt, ...)
{
    va_list ap;
 
    va_start(ap, fmt);
    SV_LogAdd(fmt, ap);
    va_end(ap);
}
 
static void SV_PlayerPrintf (const SrvPlayer* player, int level, const char* fmt, va_list ap)
{
    if (level == PRINT_NONE)
        return;
 
    if (player) {
        char msg[1024];
        Q_vsnprintf(msg, sizeof(msg), fmt, ap);
        client_t* cl = SV_GetClient(player->getNum());
        SV_ClientPrintf(cl, level, "%s", msg);
    } else
        SV_LogAdd(fmt, ap);
}
 
static float SV_GetVisibility (const pos3_t position)
{
    return CM_GetVisibility(&sv->mapTiles, position);
}
 
static void SV_error (const char* fmt, ...) __attribute__((noreturn));
static void SV_error (const char* fmt, ...)
{
    char msg[1024];
    va_list argptr;
 
    va_start(argptr, fmt);
    Q_vsnprintf(msg, sizeof(msg), fmt, argptr);
    va_end(argptr);
 
    Com_Error(ERR_DROP, "Game Error: %s", msg);
}
 
static unsigned int SV_FindIndex (const char* name, int start, int max, bool create)
{
    int i;
 
    if (!name || !name[0])
        return 0;
 
    for (i = 1; i < max && SV_GetConfigString(start + i)[0] != '\0'; i++) {
        const char* configString = SV_GetConfigString(start + i);
        if (Q_streq(configString, name))
            return i;
    }
 
    if (!create)
        return 0;
 
    if (i == max)
        SV_error("*Index: overflow '%s' start: %i, max: %i", name, start, max);
 
    SV_SetConfigString(start + i, name);
 
    if (Com_ServerState() != ss_loading) {  /* send the update to everyone */
        dbuffer msg(4 + strlen(name));
        NET_WriteByte(&msg, svc_configstring);
        NET_WriteShort(&msg, start + i);
        NET_WriteString(&msg, name);
        SV_Multicast(~0, msg);
    }
 
    return i;
}
 
static unsigned int SV_ModelIndex (const char* name)
{
    return SV_FindIndex(name, CS_MODELS, MAX_MODELS, true);
}
 
static void SV_SetModel (edict_t* ent, const char* name)
{
    if (!name)
        SV_error("SV_SetModel: nullptr");
 
    ent->modelindex = SV_ModelIndex(name);
 
    /* if it is an inline model, get the size information for it */
    if (name[0] == '*') {
        const cBspModel_t* mod = CM_InlineModel(&sv->mapTiles, name);
        /* Copy model mins and maxs to entity */
        ent->entBox.set(mod->cbmBox);
        /* This is to help the entity collision code out */
        /* Copy entity origin and angles to model*/
        CM_SetInlineModelOrientation(&sv->mapTiles, name, ent->origin, ent->angles);
    }
}
 
static void SV_Configstring (int index, const char* fmt, ...)
{
    char val[MAX_TOKEN_CHARS * MAX_TILESTRINGS];
    va_list argptr;
 
    if (!Com_CheckConfigStringIndex(index))
        SV_error("configstring: bad index %i", index);
 
    va_start(argptr, fmt);
    Q_vsnprintf(val, sizeof(val), fmt, argptr);
    va_end(argptr);
 
    SV_SetConfigString(index, val);
 
    if (Com_ServerState() != ss_loading) { /* send the update to everyone */
        dbuffer msg(4 + strlen(val));
        NET_WriteByte(&msg, svc_configstring);
        NET_WriteShort(&msg, index);
        NET_WriteString(&msg, val);
 
        /* send to all clients */
        SV_Multicast(~0, msg);
    }
}
 
static void SV_WriteChar (char c)
{
    NET_WriteChar(sv->pendingEvent.buf, c);
}
 
static void SV_WriteByte (byte c)
{
    NET_WriteByte(sv->pendingEvent.buf, c);
}
 
static void SV_WriteShort (int c)
{
    NET_WriteShort(sv->pendingEvent.buf, c);
}
 
static void SV_WriteLong (int c)
{
    NET_WriteLong(sv->pendingEvent.buf, c);
}
 
static void SV_WriteString (const char* s)
{
    NET_WriteString(sv->pendingEvent.buf, s);
}
 
static void SV_WritePos (const vec3_t pos)
{
    NET_WritePos(sv->pendingEvent.buf, pos);
}
 
static void SV_WriteGPos (const pos3_t pos)
{
    NET_WriteGPos(sv->pendingEvent.buf, pos);
}
 
static void SV_WriteDir (const vec3_t dir)
{
    NET_WriteDir(sv->pendingEvent.buf, dir);
}
 
static void SV_WriteAngle (float f)
{
    NET_WriteAngle(sv->pendingEvent.buf, f);
}
 
static void SV_WriteFormat (const char* format, ...)
{
    va_list ap;
    va_start(ap, format);
    NET_vWriteFormat(sv->pendingEvent.buf, format, ap);
    va_end(ap);
}
 
static int SV_ReadChar (void)
{
    return NET_ReadChar(sv->messageBuffer);
}
 
static int SV_ReadByte (void)
{
    return NET_ReadByte(sv->messageBuffer);
}
 
static int SV_ReadShort (void)
{
    return NET_ReadShort(sv->messageBuffer);
}
 
static int SV_ReadLong (void)
{
    return NET_ReadLong(sv->messageBuffer);
}
 
static int SV_ReadString (char* str, size_t length)
{
    return NET_ReadString(sv->messageBuffer, str, length);
}
 
static void SV_ReadPos (vec3_t pos)
{
    NET_ReadPos(sv->messageBuffer, pos);
}
 
static void SV_ReadGPos (pos3_t pos)
{
    NET_ReadGPos(sv->messageBuffer, pos);
}
 
static void SV_ReadDir (vec3_t vector)
{
    NET_ReadDir(sv->messageBuffer, vector);
}
 
static float SV_ReadAngle (void)
{
    return NET_ReadAngle(sv->messageBuffer);
}
 
static void SV_ReadData (void* buffer, int size)
{
    NET_ReadData(sv->messageBuffer, buffer, size);
}
 
static void SV_ReadFormat (const char* format, ...)
{
    va_list ap;
 
    assert(format);
    if (!*format) /* PA_NULL */
        return;
 
    va_start(ap, format);
    NET_vReadFormat(sv->messageBuffer, format, ap);
    va_end(ap);
}
 
static void SV_AbortEvents (void)
{
    pending_event_t* p = &sv->pendingEvent;
 
    if (!p->pending)
        return;
 
    p->pending = false;
    delete p->buf;
    p->buf = nullptr;
}
 
static void SV_SendQueuedEvents (void)
{
    for (int i = 0; i < sv->eventQueuePos; i++) {
        pending_event_t& entry = sv->eventQueue[i];
        NET_WriteByte(entry.buf, EV_NULL);
        SV_Multicast(entry.playerMask, *entry.buf);
        delete entry.buf;
    }
    sv->eventQueuePos = 0;
}
 
static void SV_EndEvents (void)
{
    pending_event_t* p = &sv->pendingEvent;
 
    if (!p->pending) {
        SV_SendQueuedEvents();
        return;
    }
 
    NET_WriteByte(p->buf, EV_NULL);
    SV_Multicast(p->playerMask, *p->buf);
    p->pending = false;
    delete p->buf;
    p->buf = nullptr;
 
    SV_SendQueuedEvents();
}
 
typedef struct {
    const char* name;
} eventNames_t;
 
#define M(x) { #x }
static const eventNames_t eventNames[] = {
    M(EV_NULL),
    M(EV_RESET),
    M(EV_START),
    M(EV_ENDROUND),
    M(EV_ENDROUNDANNOUNCE),
 
    M(EV_RESULTS),
    M(EV_CENTERVIEW),
    M(EV_MOVECAMERA),
 
    M(EV_ENT_APPEAR),
    M(EV_ENT_PERISH),
    M(EV_ENT_DESTROY),
    M(EV_ADD_BRUSH_MODEL),
    M(EV_ADD_EDICT),
 
    M(EV_ACTOR_APPEAR),
    M(EV_ACTOR_ADD),
    M(EV_ACTOR_TURN),
    M(EV_ACTOR_MOVE),
    M(EV_ACTOR_REACTIONFIRECHANGE),
    M(EV_ACTOR_REACTIONFIREADDTARGET),
    M(EV_ACTOR_REACTIONFIREREMOVETARGET),
    M(EV_ACTOR_REACTIONFIRETARGETUPDATE),
    M(EV_ACTOR_REACTIONFIREABORTSHOT),
 
    M(EV_ACTOR_START_SHOOT),
    M(EV_ACTOR_SHOOT),
    M(EV_ACTOR_SHOOT_HIDDEN),
    M(EV_ACTOR_THROW),
    M(EV_ACTOR_END_SHOOT),
 
    M(EV_ACTOR_DIE),
    M(EV_ACTOR_REVITALISED),
    M(EV_ACTOR_STATS),
    M(EV_ACTOR_STATECHANGE),
    M(EV_ACTOR_RESERVATIONCHANGE),
    M(EV_ACTOR_WOUND),
 
    M(EV_INV_ADD),
    M(EV_INV_DEL),
    M(EV_INV_AMMO),
    M(EV_INV_RELOAD),
    M(EV_INV_TRANSFER),
 
    M(EV_MODEL_EXPLODE),
    M(EV_MODEL_EXPLODE_TRIGGERED),
 
    M(EV_PARTICLE_APPEAR),
    M(EV_PARTICLE_SPAWN),
 
    M(EV_SOUND),
 
    M(EV_DOOR_OPEN),
    M(EV_DOOR_CLOSE),
    M(EV_CLIENT_ACTION),
    M(EV_RESET_CLIENT_ACTION),
 
    M(EV_CAMERA_APPEAR)
};
#undef M
CASSERT(lengthof(eventNames) == EV_NUM_EVENTS);
 
static void SV_AddEvent (unsigned int mask, int eType, int entnum)
{
    pending_event_t* p = &sv->pendingEvent;
    const int rawType = eType &~ EVENT_INSTANTLY;
 
    if (rawType >= EV_NUM_EVENTS || rawType < 0)
        Com_Error(ERR_DROP, "SV_AddEvent: invalid event %i", rawType);
 
    const char* eventName = eventNames[rawType].name;
    Com_DPrintf(DEBUG_EVENTSYS, "Event type: %s (%i - %i) (mask %s) (entnum: %i)\n", eventName,
            rawType, eType, Com_UnsignedIntToBinary(mask), entnum);
 
    /* finish the last event */
    if (p->pending)
        SV_EndEvents();
    else
        SV_SendQueuedEvents();
 
    /* start the new event */
    p->pending = true;
    p->playerMask = mask;
    p->type = eType;
    p->entnum = entnum;
    p->buf = new dbuffer();
 
    /* write header */
    NET_WriteByte(p->buf, svc_event);
    NET_WriteByte(p->buf, eType);
    if (entnum != -1)
        NET_WriteShort(p->buf, entnum);
}
 
static void SV_QueueEvent (unsigned int mask, int eType, int entnum)
{
    if (sv->eventQueuePos > lengthof(sv->eventQueue))
        Com_Error(ERR_DROP, "overflow in SV_QueueEvent");
 
    const int rawType = eType &~ EVENT_INSTANTLY;
 
    if (rawType >= EV_NUM_EVENTS || rawType < 0)
        Com_Error(ERR_DROP, "SV_QueueEvent: invalid event %i", rawType);
 
    const char* eventName = eventNames[rawType].name;
    Com_DPrintf(DEBUG_EVENTSYS, "Queued event type: %s (%i - %i) (mask %s) (entnum: %i)\n", eventName,
            rawType, eType, Com_UnsignedIntToBinary(mask), entnum);
 
    pending_event_t& p = sv->eventQueue[sv->eventQueuePos++];
 
    /* start the new event */
    p.pending = false;
    p.playerMask = mask;
    p.type = eType;
    p.entnum = entnum;
    p.buf = new dbuffer();
    /* write header */
    NET_WriteByte(p.buf, svc_event);
    NET_WriteByte(p.buf, eType);
    if (p.entnum != -1)
        NET_WriteShort(p.buf, p.entnum);
}
 
static void SV_QueueWriteByte (byte c)
{
    NET_WriteByte(sv->eventQueue[sv->eventQueuePos - 1].buf, c);
}
 
static void SV_QueueWriteString (const char* s)
{
    NET_WriteString(sv->eventQueue[sv->eventQueuePos - 1].buf, s);
}
 
static void SV_QueueWritePos (const vec3_t pos)
{
    NET_WritePos(sv->eventQueue[sv->eventQueuePos - 1].buf, pos);
}
 
static void SV_QueueWriteShort (int c)
{
    NET_WriteShort(sv->eventQueue[sv->eventQueuePos - 1].buf, c);
}
 
static int SV_GetEvent (void)
{
    const pending_event_t* p = &sv->pendingEvent;
    if (!p->pending)
        return -1;
 
    return p->type;
}
 
static edict_t* SV_GetEventEdict (void)
{
    const pending_event_t* p = &sv->pendingEvent;
    if (!p->pending)
        return nullptr;
 
    if (p->entnum == -1)
        return nullptr;
 
    const sv_edict_t& e = sv->edicts[p->entnum];
    return e.ent;
}
 
static void* SV_TagAlloc (int size, int tagNum, const char* file, int line)
{
    if (tagNum < 0)
        tagNum *= -1;
 
    return _Mem_Alloc(size, true, sv->gameSysPool, tagNum, file, line);
}
 
static void SV_MemFree (void* ptr, const char* file, int line)
{
    _Mem_Free(ptr, file, line);
}
 
static void SV_FreeTags (int tagNum, const char* file, int line)
{
    if (tagNum < 0)
        tagNum *= -1;
 
    _Mem_FreeTag(sv->gameSysPool, tagNum, file, line);
}
 
static bool SV_TestLine (const vec3_t start, const vec3_t stop, const int levelmask)
{
    return TR_TestLine(&sv->mapTiles, start, stop, levelmask);
}
 
static bool SV_TestLineWithEnt (const vec3_t start, const vec3_t stop, const int levelmask, const char** entlist)
{
    /* do the line test */
    const bool hit = CM_EntTestLine(&sv->mapTiles, Line(start, stop), levelmask, entlist);
    return hit;
}
 
static pos_t SV_GridFall (const int actorSize, const pos3_t pos)
{
    return Grid_Fall(sv->mapData.routing, actorSize, pos);
}
 
static void SV_RecalcRouting (const char* name, const GridBox& box, const char** list)
{
    Grid_RecalcRouting(&sv->mapTiles, sv->mapData.routing, name, box, list);
}
 
static void SV_GridPosToVec (const int actorSize, const pos3_t pos, vec3_t vec)
{
    Grid_PosToVec(sv->mapData.routing, actorSize, pos, vec);
}
 
static bool SV_GridIsOnMap (const vec3_t vec)
{
    return sv->mapData.mapBox.contains(vec);
}
 
static void SV_GridCalcPathing (actorSizeEnum_t actorSize, pathing_t* path, const pos3_t from, int distance, forbiddenList_t* forbiddenList)
{
    Grid_CalcPathing(sv->mapData.routing, actorSize, path, from, distance, forbiddenList);
}
 
static bool SV_GridFindPath (actorSizeEnum_t actorSize, pathing_t* path, const pos3_t from, const pos3_t targetPos, byte crouchingState, int maxTUs, forbiddenList_t* forbiddenList)
{
    return Grid_FindPath(sv->mapData.routing, actorSize, path, from, targetPos, crouchingState, maxTUs, forbiddenList);
}
 
static bool SV_CanActorStandHere (const int actorSize, const pos3_t pos)
{
    return RT_CanActorStandHere(sv->mapData.routing, actorSize, pos);
}
 
static void SV_SetInlineModelOrientation (const char* name, const vec3_t origin, const vec3_t angles)
{
    CM_SetInlineModelOrientation(&sv->mapTiles, name, origin, angles);
}
 
static void SV_GetInlineModelAABB (const char* name, AABB& aabb)
{
    CM_GetInlineModelAABB(&sv->mapTiles, name, aabb);
}
 
static void SV_UnloadGame (void)
{
#ifndef HARD_LINKED_GAME
    if (svs.gameLibrary) {
        Com_Printf("Unload the game library\n");
        SDL_UnloadObject(svs.gameLibrary);
    }
#endif
}
 
#ifndef HARD_LINKED_GAME
static bool SV_LoadGame (const char* path)
{
    char name[MAX_OSPATH];
 
    Com_sprintf(name, sizeof(name), "%s/game_" CPUSTRING ".%s", path, SO_EXT);
    svs.gameLibrary = SDL_LoadObject(name);
    if (!svs.gameLibrary) {
        Com_sprintf(name, sizeof(name), "%s/game.%s", path, SO_EXT);
        svs.gameLibrary = SDL_LoadObject(name);
    }
 
    if (svs.gameLibrary) {
        Com_Printf("found at '%s'\n", path);
        return true;
    } else {
        Com_Printf("not found at '%s'\n", path);
        Com_DPrintf(DEBUG_SYSTEM, "%s\n", SDL_GetError());
        return false;
    }
}
#endif
 
static game_export_t* SV_GetGameAPI (game_import_t* parms)
{
#ifndef HARD_LINKED_GAME
    typedef game_export_t* (*game_api_t) (game_import_t*);
    game_api_t GetGameAPI;
    const char* path;
 
    if (svs.gameLibrary)
        Com_Error(ERR_FATAL, "SV_GetGameAPI without SV_UnloadGame");
 
    Com_Printf("------- Loading game.%s -------\n", SO_EXT);
 
#ifdef PKGLIBDIR
    SV_LoadGame(PKGLIBDIR);
#endif
 
    /* now run through the search paths */
    path = nullptr;
    while (!svs.gameLibrary) {
        path = FS_NextPath(path);
        if (!path)
            /* couldn't find one anywhere */
            return nullptr;
        else if (SV_LoadGame(path))
            break;
    }
 
    GetGameAPI = (game_api_t)(uintptr_t)SDL_LoadFunction(svs.gameLibrary, "GetGameAPI");
    if (!GetGameAPI) {
        SV_UnloadGame();
        return nullptr;
    }
#endif
 
    return GetGameAPI(parms);
}
 
static char const* const gameSysPoolName = "Server: Game system";
 
void SV_ShutdownGameProgs (void)
{
    uint32_t size;
 
    if (!svs.ge)
        return;
 
    Com_SetServerState(ss_game_shutdown);
 
    if (svs.gameThread) {
        SDL_CondSignal(svs.gameFrameCond);
        SDL_WaitThread(svs.gameThread, nullptr);
        SDL_DestroyCond(svs.gameFrameCond);
        svs.gameFrameCond = nullptr;
        svs.gameThread = nullptr;
    }
 
    svs.ge->Shutdown();
 
    size = Mem_PoolSize(sv->gameSysPool);
    if (size > 0) {
        Com_Printf("WARNING: Game memory leak (%u bytes)\n", size);
        Cmd_ExecuteString("mem_stats %s", gameSysPoolName);
    }
 
    Mem_DeletePool(sv->gameSysPool);
    sv->gameSysPool = nullptr;
 
    SV_UnloadGame();
 
    svs.ge = nullptr;
}
 
int SV_RunGameFrameThread (void* data)
{
    do {
        const ScopedMutex scopedMutex(svs.serverMutex);
        SDL_CondWait(svs.gameFrameCond, svs.serverMutex);
        SV_RunGameFrame();
    } while (!sv->endgame);
 
    return 0;
}
 
void SV_RunGameFrame (void)
{
    sv->endgame = svs.ge->RunFrame();
    if (sv->state == ss_game_shutdown)
        sv->endgame = true;
}
 
void SV_InitGameProgs (void)
{
    game_import_t import;
 
    /* unload anything we have now */
    /*SV_ShutdownGameProgs();*/
 
    /* load a new game dll */
    import.BroadcastPrintf = SV_BroadcastPrintf;
    import.DPrintf = SV_dprintf;
    import.PlayerPrintf = SV_PlayerPrintf;
    import.Error = SV_error;
 
    import.Trace = SV_Trace;
    import.LinkEdict = SV_LinkEdict;
    import.UnlinkEdict = SV_UnlinkEdict;
 
    import.TestLine = SV_TestLine;
    import.TestLineWithEnt = SV_TestLineWithEnt;
    import.GrenadeTarget = Com_GrenadeTarget;
 
    import.GridCalcPathing = SV_GridCalcPathing;
    import.GridFindPath = SV_GridFindPath;
    import.MoveStore = Grid_MoveStore;
    import.MoveLength = Grid_MoveLength;
    import.MoveNext = Grid_MoveNext;
    import.GetTUsForDirection = Grid_GetTUsForDirection;
    import.GridFall = SV_GridFall;
    import.GridPosToVec = SV_GridPosToVec;
    import.isOnMap = SV_GridIsOnMap;
    import.GridRecalcRouting = SV_RecalcRouting;
    import.CanActorStandHere = SV_CanActorStandHere;
    import.GridShouldUseAutostand = Grid_ShouldUseAutostand;
 
    import.GetVisibility = SV_GetVisibility;
 
    import.ModelIndex = SV_ModelIndex;
 
    import.SetInlineModelOrientation = SV_SetInlineModelOrientation;
    import.GetInlineModelAABB = SV_GetInlineModelAABB;
 
    import.SetModel = SV_SetModel;
 
    import.ConfigString = SV_Configstring;
 
    import.PointContents = SV_PointContents;
    import.GetFootstepSound = SV_GetFootstepSound;
    import.GetBounceFraction = SV_GetBounceFraction;
    import.LoadModelAABB = SV_LoadModelAABB;
 
    import.FS_Gamedir = FS_Gamedir;
    import.FS_LoadFile = FS_LoadFile;
    import.FS_FreeFile = FS_FreeFile;
    import.Sys_Fopen = Sys_Fopen;
 
    import.WriteChar = SV_WriteChar;
    import.WriteByte = SV_WriteByte;
    import.WriteShort = SV_WriteShort;
    import.WriteLong = SV_WriteLong;
    import.WriteString = SV_WriteString;
    import.WritePos = SV_WritePos;
    import.WriteGPos = SV_WriteGPos;
    import.WriteDir = SV_WriteDir;
    import.WriteAngle = SV_WriteAngle;
    import.WriteFormat = SV_WriteFormat;
 
    import.AbortEvents = SV_AbortEvents;
    import.EndEvents = SV_EndEvents;
    import.AddEvent = SV_AddEvent;
    import.GetEvent = SV_GetEvent;
    import.GetEventEdict = SV_GetEventEdict;
 
    import.QueueEvent = SV_QueueEvent;
    import.QueueWriteByte = SV_QueueWriteByte;
    import.QueueWritePos = SV_QueueWritePos;
    import.QueueWriteString = SV_QueueWriteString;
    import.QueueWriteShort = SV_QueueWriteShort;
 
    import.ReadChar = SV_ReadChar;
    import.ReadByte = SV_ReadByte;
    import.ReadShort = SV_ReadShort;
    import.ReadLong = SV_ReadLong;
    import.ReadString = SV_ReadString;
    import.ReadPos = SV_ReadPos;
    import.ReadGPos = SV_ReadGPos;
    import.ReadDir = SV_ReadDir;
    import.ReadAngle = SV_ReadAngle;
    import.ReadData = SV_ReadData;
    import.ReadFormat = SV_ReadFormat;
 
    import.GetConstInt = Com_GetConstInt;
    import.GetConstIntFromNamespace = Com_GetConstIntFromNamespace;
    import.GetConstVariable = Com_GetConstVariable;
    import.RegisterConstInt = Com_RegisterConstInt;
    import.UnregisterConstVariable = Com_UnregisterConstVariable;
 
    import.GetCharacterValues = Com_GetCharacterValues;
 
    import.TagMalloc = SV_TagAlloc;
    import.TagFree = SV_MemFree;
    import.FreeTags = SV_FreeTags;
 
    import.Cvar_Get = Cvar_Get;
    import.Cvar_Set = Cvar_Set;
    import.Cvar_String = Cvar_GetString;
 
    import.Cmd_Argc = Cmd_Argc;
    import.Cmd_Argv = Cmd_Argv;
    import.Cmd_Args = Cmd_Args;
    import.AddCommandString = Cbuf_AddText;
 
    import.seed = Sys_Milliseconds();
    import.csi = &csi;
 
    Com_Printf("setting game random seed to %i\n", import.seed);
 
    svs.ge = SV_GetGameAPI(&import);
 
    if (!svs.ge)
        Com_Error(ERR_DROP, "failed to load game library");
    if (svs.ge->apiversion != GAME_API_VERSION)
        Com_Error(ERR_DROP, "game is version %i, not %i", svs.ge->apiversion, GAME_API_VERSION);
 
    sv->gameSysPool = Mem_CreatePool(gameSysPoolName);
 
    svs.ge->Init();
 
    if (sv_threads->integer) {
        svs.gameFrameCond = SDL_CreateCond();
        svs.gameThread = Com_CreateThread(SV_RunGameFrameThread, "GameThread");
    }
}