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路径: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\lua-5.1.4\include\lgc.h
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/* ** $Id: lgc.h,v 2.15.1.1 2007/12/27 13:02:25 roberto Exp $ ** Garbage Collector ** See Copyright Notice in lua.h */ #ifndef lgc_h #define lgc_h #include "lobject.h" /* ** Possible states of the Garbage Collector */ #define GCSpause 0 #define GCSpropagate 1 #define GCSsweepstring 2 #define GCSsweep 3 #define GCSfinalize 4 /* ** some userful bit tricks */ #define resetbits(x,m) ((x) &= cast(lu_byte, ~(m))) #define setbits(x,m) ((x) |= (m)) #define testbits(x,m) ((x) & (m)) #define bitmask(b) (1<<(b)) #define bit2mask(b1,b2) (bitmask(b1) | bitmask(b2)) #define l_setbit(x,b) setbits(x, bitmask(b)) #define resetbit(x,b) resetbits(x, bitmask(b)) #define testbit(x,b) testbits(x, bitmask(b)) #define set2bits(x,b1,b2) setbits(x, (bit2mask(b1, b2))) #define reset2bits(x,b1,b2) resetbits(x, (bit2mask(b1, b2))) #define test2bits(x,b1,b2) testbits(x, (bit2mask(b1, b2))) /* ** Layout for bit use in `marked' field: ** bit 0 - object is white (type 0) ** bit 1 - object is white (type 1) ** bit 2 - object is black ** bit 3 - for userdata: has been finalized ** bit 3 - for tables: has weak keys ** bit 4 - for tables: has weak values ** bit 5 - object is fixed (should not be collected) ** bit 6 - object is "super" fixed (only the main thread) */ #define WHITE0BIT 0 #define WHITE1BIT 1 #define BLACKBIT 2 #define FINALIZEDBIT 3 #define KEYWEAKBIT 3 #define VALUEWEAKBIT 4 #define FIXEDBIT 5 #define SFIXEDBIT 6 #define WHITEBITS bit2mask(WHITE0BIT, WHITE1BIT) #define iswhite(x) test2bits((x)->gch.marked, WHITE0BIT, WHITE1BIT) #define isblack(x) testbit((x)->gch.marked, BLACKBIT) #define isgray(x) (!isblack(x) && !iswhite(x)) #define otherwhite(g) (g->currentwhite ^ WHITEBITS) #define isdead(g,v) ((v)->gch.marked & otherwhite(g) & WHITEBITS) #define changewhite(x) ((x)->gch.marked ^= WHITEBITS) #define gray2black(x) l_setbit((x)->gch.marked, BLACKBIT) #define valiswhite(x) (iscollectable(x) && iswhite(gcvalue(x))) #define luaC_white(g) cast(lu_byte, (g)->currentwhite & WHITEBITS) #define luaC_checkGC(L) { \ condhardstacktests(luaD_reallocstack(L, L->stacksize - EXTRA_STACK - 1)); \ if (G(L)->totalbytes >= G(L)->GCthreshold) \ luaC_step(L); } #define luaC_barrier(L,p,v) { if (valiswhite(v) && isblack(obj2gco(p))) \ luaC_barrierf(L,obj2gco(p),gcvalue(v)); } #define luaC_barriert(L,t,v) { if (valiswhite(v) && isblack(obj2gco(t))) \ luaC_barrierback(L,t); } #define luaC_objbarrier(L,p,o) \ { if (iswhite(obj2gco(o)) && isblack(obj2gco(p))) \ luaC_barrierf(L,obj2gco(p),obj2gco(o)); } #define luaC_objbarriert(L,t,o) \ { if (iswhite(obj2gco(o)) && isblack(obj2gco(t))) luaC_barrierback(L,t); } LUAI_FUNC size_t luaC_separateudata (lua_State *L, int all); LUAI_FUNC void luaC_callGCTM (lua_State *L); LUAI_FUNC void luaC_freeall (lua_State *L); LUAI_FUNC void luaC_step (lua_State *L); LUAI_FUNC void luaC_fullgc (lua_State *L); LUAI_FUNC void luaC_link (lua_State *L, GCObject *o, lu_byte tt); LUAI_FUNC void luaC_linkupval (lua_State *L, UpVal *uv); LUAI_FUNC void luaC_barrierf (lua_State *L, GCObject *o, GCObject *v); LUAI_FUNC void luaC_barrierback (lua_State *L, Table *t); #endif
lgc.h
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