diff options
Diffstat (limited to 'Build/source/texk/web2c/luatexdir/lua52/lgc.h')
-rw-r--r-- | Build/source/texk/web2c/luatexdir/lua52/lgc.h | 147 |
1 files changed, 0 insertions, 147 deletions
diff --git a/Build/source/texk/web2c/luatexdir/lua52/lgc.h b/Build/source/texk/web2c/luatexdir/lua52/lgc.h deleted file mode 100644 index bdd5cce6cf8..00000000000 --- a/Build/source/texk/web2c/luatexdir/lua52/lgc.h +++ /dev/null @@ -1,147 +0,0 @@ -/* -** $Id: lgc.h,v 2.56 2012/05/23 15:43:14 roberto Exp $ -** Garbage Collector -** See Copyright Notice in lua.h -*/ - -#ifndef lgc_h -#define lgc_h - - -#include "lobject.h" -#include "lstate.h" - -/* -** Collectable objects may have one of three colors: white, which -** means the object is not marked; gray, which means the -** object is marked, but its references may be not marked; and -** black, which means that the object and all its references are marked. -** The main invariant of the garbage collector, while marking objects, -** is that a black object can never point to a white one. Moreover, -** any gray object must be in a "gray list" (gray, grayagain, weak, -** allweak, ephemeron) so that it can be visited again before finishing -** the collection cycle. These lists have no meaning when the invariant -** is not being enforced (e.g., sweep phase). -*/ - - - -/* how much to allocate before next GC step */ -#if !defined(GCSTEPSIZE) -/* ~100 small strings */ -#define GCSTEPSIZE (cast_int(100 * sizeof(TString))) -#endif - - -/* -** Possible states of the Garbage Collector -*/ -#define GCSpropagate 0 -#define GCSatomic 1 -#define GCSsweepstring 2 -#define GCSsweepudata 3 -#define GCSsweep 4 -#define GCSpause 5 - - -#define issweepphase(g) \ - (GCSsweepstring <= (g)->gcstate && (g)->gcstate <= GCSsweep) - -#define isgenerational(g) ((g)->gckind == KGC_GEN) - -/* -** macro to tell when main invariant (white objects cannot point to black -** ones) must be kept. During a non-generational collection, the sweep -** phase may break the invariant, as objects turned white may point to -** still-black objects. The invariant is restored when sweep ends and -** all objects are white again. During a generational collection, the -** invariant must be kept all times. -*/ -#define keepinvariant(g) (isgenerational(g) || g->gcstate <= GCSatomic) - - -/* -** some useful 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)) - - -/* Layout for bit use in `marked' field: */ -#define WHITE0BIT 0 /* object is white (type 0) */ -#define WHITE1BIT 1 /* object is white (type 1) */ -#define BLACKBIT 2 /* object is black */ -#define FINALIZEDBIT 3 /* object has been separated for finalization */ -#define SEPARATED 4 /* object is in 'finobj' list or in 'tobefnz' */ -#define FIXEDBIT 5 /* object is fixed (should not be collected) */ -#define OLDBIT 6 /* object is old (only in generational mode) */ -/* bit 7 is currently used by tests (luaL_checkmemory) */ - -#define WHITEBITS bit2mask(WHITE0BIT, WHITE1BIT) - - -#define iswhite(x) testbits((x)->gch.marked, WHITEBITS) -#define isblack(x) testbit((x)->gch.marked, BLACKBIT) -#define isgray(x) /* neither white nor black */ \ - (!testbits((x)->gch.marked, WHITEBITS | bitmask(BLACKBIT))) - -#define isold(x) testbit((x)->gch.marked, OLDBIT) - -/* MOVE OLD rule: whenever an object is moved to the beginning of - a GC list, its old bit must be cleared */ -#define resetoldbit(o) resetbit((o)->gch.marked, OLDBIT) - -#define otherwhite(g) (g->currentwhite ^ WHITEBITS) -#define isdeadm(ow,m) (!(((m) ^ WHITEBITS) & (ow))) -#define isdead(g,v) isdeadm(otherwhite(g), (v)->gch.marked) - -#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_condGC(L,c) \ - {if (G(L)->GCdebt > 0) {c;}; condchangemem(L);} -#define luaC_checkGC(L) luaC_condGC(L, luaC_step(L);) - - -#define luaC_barrier(L,p,v) { if (valiswhite(v) && isblack(obj2gco(p))) \ - luaC_barrier_(L,obj2gco(p),gcvalue(v)); } - -#define luaC_barrierback(L,p,v) { if (valiswhite(v) && isblack(obj2gco(p))) \ - luaC_barrierback_(L,p); } - -#define luaC_objbarrier(L,p,o) \ - { if (iswhite(obj2gco(o)) && isblack(obj2gco(p))) \ - luaC_barrier_(L,obj2gco(p),obj2gco(o)); } - -#define luaC_objbarrierback(L,p,o) \ - { if (iswhite(obj2gco(o)) && isblack(obj2gco(p))) luaC_barrierback_(L,p); } - -#define luaC_barrierproto(L,p,c) \ - { if (isblack(obj2gco(p))) luaC_barrierproto_(L,p,c); } - -LUAI_FUNC void luaC_freeallobjects (lua_State *L); -LUAI_FUNC void luaC_step (lua_State *L); -LUAI_FUNC void luaC_forcestep (lua_State *L); -LUAI_FUNC void luaC_runtilstate (lua_State *L, int statesmask); -LUAI_FUNC void luaC_fullgc (lua_State *L, int isemergency); -LUAI_FUNC GCObject *luaC_newobj (lua_State *L, int tt, size_t sz, - GCObject **list, int offset); -LUAI_FUNC void luaC_barrier_ (lua_State *L, GCObject *o, GCObject *v); -LUAI_FUNC void luaC_barrierback_ (lua_State *L, GCObject *o); -LUAI_FUNC void luaC_barrierproto_ (lua_State *L, Proto *p, Closure *c); -LUAI_FUNC void luaC_checkfinalizer (lua_State *L, GCObject *o, Table *mt); -LUAI_FUNC void luaC_checkupvalcolor (global_State *g, UpVal *uv); -LUAI_FUNC void luaC_changemode (lua_State *L, int mode); - -#endif |