diff options
Diffstat (limited to 'src/lua51/lgc.h')
| -rw-r--r-- | src/lua51/lgc.h | 28 |
1 files changed, 15 insertions, 13 deletions
diff --git a/src/lua51/lgc.h b/src/lua51/lgc.h index 5a8dc60..9fa686a 100644 --- a/src/lua51/lgc.h +++ b/src/lua51/lgc.h @@ -14,11 +14,11 @@ /* ** Possible states of the Garbage Collector */ -#define GCSpause 0 -#define GCSpropagate 1 -#define GCSsweepstring 2 -#define GCSsweep 3 -#define GCSfinalize 4 +#define GCSpause 0 // 暂停 +#define GCSpropagate 1 // 扫描，正在遍历灰色节点，检查引用情况 +#define GCSsweepstring 2 // 字符串回收阶段 +#define GCSsweep 3 // 除了字符串的其他对象的回收阶段 +#define GCSfinalize 4 // 终止阶段 /* @@ -51,15 +51,15 @@ */ -#define WHITE0BIT 0 -#define WHITE1BIT 1 +#define WHITE0BIT 0 // 01 +#define WHITE1BIT 1 // 10 #define BLACKBIT 2 -#define FINALIZEDBIT 3 -#define KEYWEAKBIT 3 -#define VALUEWEAKBIT 4 -#define FIXEDBIT 5 -#define SFIXEDBIT 6 -#define WHITEBITS bit2mask(WHITE0BIT, WHITE1BIT) +#define FINALIZEDBIT 3 //标记没有被引用的udata +#define KEYWEAKBIT 3 //标记弱表的key +#define VALUEWEAKBIT 4 // 标记弱表的value +#define FIXEDBIT 5 // 标记lua_state主线程对象不可回收 +#define SFIXEDBIT 6 // 标记lua关键字不要回收 +#define WHITEBITS bit2mask(WHITE0BIT, WHITE1BIT) // 结果是11 #define iswhite(x) test2bits((x)->gch.marked, WHITE0BIT, WHITE1BIT) @@ -74,6 +74,8 @@ #define valiswhite(x) (iscollectable(x) && iswhite(gcvalue(x))) +// g->currentwhite & WHITEBITS是 current white +// g->currentwhite ^ WHITEBITS是 otherwhite #define luaC_white(g) cast(lu_byte, (g)->currentwhite & WHITEBITS) |