Lua 5.1.4: lgc.h
L0001
L0006
L0007 #ifndef lgc_h
L0008 #define lgc_h
L0009
L0010
L0011 #include "lobject.h"
L0012
L0013
L0014
L0017 #define GCSpause 0
L0018 #define GCSpropagate 1
L0019 #define GCSsweepstring 2
L0020 #define GCSsweep 3
L0021 #define GCSfinalize 4
L0022
L0023
L0024
L0027 #define resetbits(x,m) ((x) &= cast(lu_byte, ~(m)))
L0028 #define setbits(x,m) ((x) |= (m))
L0029 #define testbits(x,m) ((x) & (m))
L0030 #define bitmask(b) (1<<(b))
L0031 #define bit2mask(b1,b2) (bitmask(b1) | bitmask(b2))
L0032 #define l_setbit(x,b) setbits(x, bitmask(b))
L0033 #define resetbit(x,b) resetbits(x, bitmask(b))
L0034 #define testbit(x,b) testbits(x, bitmask(b))
L0035 #define set2bits(x,b1,b2) setbits(x, (bit2mask(b1, b2)))
L0036 #define reset2bits(x,b1,b2) resetbits(x, (bit2mask(b1, b2)))
L0037 #define test2bits(x,b1,b2) testbits(x, (bit2mask(b1, b2)))
L0038
L0039
L0040
L0041
L0052
L0053
L0054 #define WHITE0BIT 0
L0055 #define WHITE1BIT 1
L0056 #define BLACKBIT 2
L0057 #define FINALIZEDBIT 3
L0058 #define KEYWEAKBIT 3
L0059 #define VALUEWEAKBIT 4
L0060 #define FIXEDBIT 5
L0061 #define SFIXEDBIT 6
L0062 #define WHITEBITS bit2mask(WHITE0BIT, WHITE1BIT)
L0063
L0064
L0065 #define iswhite(x) test2bits((x)->gch.marked, WHITE0BIT, WHITE1BIT)
L0066 #define isblack(x) testbit((x)->gch.marked, BLACKBIT)
L0067 #define isgray(x) (!isblack(x) && !iswhite(x))
L0068
L0069 #define otherwhite(g) (g->currentwhite ^ WHITEBITS)
L0070 #define isdead(g,v) ((v)->gch.marked & otherwhite(g) & WHITEBITS)
L0071
L0072 #define changewhite(x) ((x)->gch.marked ^= WHITEBITS)
L0073 #define gray2black(x) l_setbit((x)->gch.marked, BLACKBIT)
L0074
L0075 #define valiswhite(x) (iscollectable(x) && iswhite(gcvalue(x)))
L0076
L0077 #define luaC_white(g) cast(lu_byte, (g)->currentwhite & WHITEBITS)
L0078
L0079
L0080 #define luaC_checkGC(L) { \
L0081 condhardstacktests(luaD_reallocstack(L, L->stacksize - EXTRA_STACK - 1)); \
L0082 if (G(L)->totalbytes >= G(L)->GCthreshold) \
L0083 luaC_step(L); }
L0084
L0085
L0086 #define luaC_barrier(L,p,v) { if (valiswhite(v) && isblack(obj2gco(p))) \
L0087 luaC_barrierf(L,obj2gco(p),gcvalue(v)); }
L0088
L0089 #define luaC_barriert(L,t,v) { if (valiswhite(v) && isblack(obj2gco(t))) \
L0090 luaC_barrierback(L,t); }
L0091
L0092 #define luaC_objbarrier(L,p,o) \
L0093 { if (iswhite(obj2gco(o)) && isblack(obj2gco(p))) \
L0094 luaC_barrierf(L,obj2gco(p),obj2gco(o)); }
L0095
L0096 #define luaC_objbarriert(L,t,o) \
L0097 { if (iswhite(obj2gco(o)) && isblack(obj2gco(t))) luaC_barrierback(L,t); }
L0098
L0099 LUAI_FUNC size_t luaC_separateudata (lua_State *L, int all);
L0100 LUAI_FUNC void luaC_callGCTM (lua_State *L);
L0101 LUAI_FUNC void luaC_freeall (lua_State *L);
L0102 LUAI_FUNC void luaC_step (lua_State *L);
L0103 LUAI_FUNC void luaC_fullgc (lua_State *L);
L0104 LUAI_FUNC void luaC_link (lua_State *L, GCObject *o, lu_byte tt);
L0105 LUAI_FUNC void luaC_linkupval (lua_State *L, UpVal *uv);
L0106 LUAI_FUNC void luaC_barrierf (lua_State *L, GCObject *o, GCObject *v);
L0107 LUAI_FUNC void luaC_barrierback (lua_State *L, Table *t);
L0108
L0109
L0110 #endif
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