mirror of https://github.com/lua/lua
75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
/*
|
|
** $Id: lgc.h,v 1.25 2003/12/01 16:33:30 roberto Exp roberto $
|
|
** Garbage Collector
|
|
** See Copyright Notice in lua.h
|
|
*/
|
|
|
|
#ifndef lgc_h
|
|
#define lgc_h
|
|
|
|
|
|
#include "lobject.h"
|
|
|
|
|
|
/*
|
|
** Possible states of the Garbage Collector
|
|
*/
|
|
#define GCSroot 0
|
|
#define GCSpropagate 1
|
|
#define GCSatomic 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 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 gray
|
|
** bit 1 - object is black
|
|
** bit 2 - For userdata: is finalized;
|
|
for tables: has weak keys
|
|
** bit 3 - for tables: has weak values
|
|
** bit 4 - object is fixed (should not be collected)
|
|
*/
|
|
|
|
#define WHITE0BIT 0
|
|
#define WHITE1BIT 1
|
|
#define BLACKBIT 2
|
|
#define FINALIZEDBIT 3
|
|
#define KEYWEAKBIT 3
|
|
#define VALUEWEAKBIT 4
|
|
#define FIXEDBIT 5
|
|
|
|
|
|
#define luaC_white(g) cast(lu_byte, (g)->currentwhite)
|
|
|
|
|
|
#define luaC_checkGC(L) { if (G(L)->nblocks >= G(L)->GCthreshold) \
|
|
luaC_collectgarbage(L); }
|
|
|
|
|
|
size_t luaC_separateudata (lua_State *L);
|
|
void luaC_callGCTM (lua_State *L);
|
|
void luaC_sweepall (lua_State *L);
|
|
void luaC_collectgarbage (lua_State *L);
|
|
void luaC_link (lua_State *L, GCObject *o, lu_byte tt);
|
|
|
|
|
|
#endif
|