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/*
** Global State
** See Copyright Notice in lua.h
*/
#ifndef GRIM_LSTATE_H
#define GRIM_LSTATE_H
#include "engines/grim/lua/lobject.h"
#include <setjmp.h>
namespace Grim {
#define MAX_C_BLOCKS 10
#define GARBAGE_BLOCK 150
/* The pause status for the scripts is stored in one byte in the savegame.
*
* The "single script pause" status will be stored in the highest significant bit.
* For GRIM that flag is never set because GRIM does not pause single scripts.
*
* The "all scripts pause" status is a number which counts, how often
* pause_scripts(TRUE) was called without a corresponding unpause_scripts() call.
* The value is stored in the lower 7 bit of the pause status byte.
* For GRIM, since the (un)pause_scripts() are called symmetrically, only
* the lowest bit will be used.
*/
#define LUA_SG_ALL_PAUSED 0x7f
#define LUA_SG_PAUSED 0x80
typedef int32 StkId; /* index to stack elements */
struct Stack {
TObject *top;
TObject *stack;
TObject *last;
};
struct C_Lua_Stack {
StkId base; // when Lua calls C or C calls Lua, points to
// the first slot after the last parameter.
StkId lua2C; // points to first element of "array" lua2C
int32 num; // size of "array" lua2C
};
typedef struct {
int32 size;
int32 nuse; // number of elements (including EMPTYs)
TaggedString **hash;
} stringtable;
enum Status { LOCK, HOLD, FREE, COLLECTED };
struct ref {
TObject o;
enum Status status;
};
struct CallInfo {
Closure *c;
TProtoFunc *tf; // Set to NULL for C function
StkId base;
byte *pc;
int32 nResults;
};
struct lua_Task;
extern GCnode rootproto;
extern GCnode rootcl;
extern GCnode rootglobal;
extern GCnode roottable;
extern struct ref *refArray;
extern int32 refSize;
extern int32 GCthreshold;
extern int32 nblocks;
extern int32 Mbuffsize;
extern int32 Mbuffnext;
extern char *Mbuffbase;
extern char *Mbuffer;
extern TObject errorim;
extern stringtable *string_root;
extern int32 last_tag;
extern struct IM *IMtable;
extern int32 IMtable_size;
struct LState {
LState *prev; // handle to previous state in list
LState *next; // handle to next state in list
int all_paused; // counter of often pause_scripts(TRUE) was called
bool paused; // true if this particular script has been paused
int32 state_counter1;
int32 state_counter2;
bool updated;
Stack stack; // Lua stack
C_Lua_Stack Cstack; // C2lua struct
struct FuncState *mainState, *currState; // point to local structs in yacc
struct LexState *lexstate; // point to local struct in yacc
jmp_buf *errorJmp; // current error recover point
lua_Task *task; // handle to task
lua_Task *some_task;
uint32 id; // current id of task
TObject taskFunc;
struct C_Lua_Stack Cblocks[MAX_C_BLOCKS];
int numCblocks; // number of nested Cblocks
int sleepFor;
};
extern LState *lua_state, *lua_rootState;
extern int globalTaskSerialId;
void lua_stateinit(LState *state);
void lua_statedeinit(LState *state);
void lua_resetglobals();
} // end of namespace Grim
#endif
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