diff options
Diffstat (limited to 'src/lgc.h')
| -rw-r--r-- | src/lgc.h | 41 |
1 files changed, 25 insertions, 16 deletions
@@ -1,5 +1,5 @@ /* -** $Id: lgc.h,v 2.86 2014/10/25 11:50:46 roberto Exp $ +** $Id: lgc.h,v 2.90 2015/10/21 18:15:15 roberto Exp $ ** Garbage Collector ** See Copyright Notice in lua.h */ @@ -101,26 +101,35 @@ #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);) +/* +** Does one step of collection when debt becomes positive. 'pre'/'pos' +** allows some adjustments to be done only when needed. macro +** 'condchangemem' is used only for heavy tests (forcing a full +** GC cycle on every opportunity) +*/ +#define luaC_condGC(L,pre,pos) \ + { if (G(L)->GCdebt > 0) { pre; luaC_step(L); pos;}; \ + condchangemem(L,pre,pos); } + +/* more often than not, 'pre'/'pos' are empty */ +#define luaC_checkGC(L) luaC_condGC(L,,) -#define luaC_barrier(L,p,v) { \ - if (iscollectable(v) && isblack(p) && iswhite(gcvalue(v))) \ - luaC_barrier_(L,obj2gco(p),gcvalue(v)); } +#define luaC_barrier(L,p,v) ( \ + (iscollectable(v) && isblack(p) && iswhite(gcvalue(v))) ? \ + luaC_barrier_(L,obj2gco(p),gcvalue(v)) : cast_void(0)) -#define luaC_barrierback(L,p,v) { \ - if (iscollectable(v) && isblack(p) && iswhite(gcvalue(v))) \ - luaC_barrierback_(L,p); } +#define luaC_barrierback(L,p,v) ( \ + (iscollectable(v) && isblack(p) && iswhite(gcvalue(v))) ? \ + luaC_barrierback_(L,p) : cast_void(0)) -#define luaC_objbarrier(L,p,o) { \ - if (isblack(p) && iswhite(o)) \ - luaC_barrier_(L,obj2gco(p),obj2gco(o)); } +#define luaC_objbarrier(L,p,o) ( \ + (isblack(p) && iswhite(o)) ? \ + luaC_barrier_(L,obj2gco(p),obj2gco(o)) : cast_void(0)) -#define luaC_upvalbarrier(L,uv) \ - { if (iscollectable((uv)->v) && !upisopen(uv)) \ - luaC_upvalbarrier_(L,uv); } +#define luaC_upvalbarrier(L,uv) ( \ + (iscollectable((uv)->v) && !upisopen(uv)) ? \ + luaC_upvalbarrier_(L,uv) : cast_void(0)) LUAI_FUNC void luaC_fix (lua_State *L, GCObject *o); LUAI_FUNC void luaC_freeallobjects (lua_State *L); |