Question

int lua_gc (lua_State *L, int what, int data);

Controls the garbage collector.

This function performs several tasks, according to the value of the parameter what:

• LUA_GCSTOP: stops the garbage collector.
• LUA_GCRESTART: restarts the garbage collector.
• LUA_GCCOLLECT: performs a full garbage-collection cycle.
• LUA_GCCOUNT: returns the current amount of memory (in Kbytes) in use by Lua.
• LUA_GCCOUNTB: returns the remainder of dividing the current amount of bytes of memory in use by Lua by 1024.
• LUA_GCSTEP: performs an incremental step of garbage collection. The step "size" is controlled by data (larger values mean more steps) in a non-specified way. If you want to control the step size you must experimentally tune the value of data. The function returns 1 if the step finished a garbage-collection cycle.
• LUA_GCSETPAUSE: sets data/100 as the new value for the pause of the collector (see §2.10). The function returns the previous value of the pause.
• LUA_GCSETSTEPMUL: sets arg/100 as the new value for the step multiplier of the collector (see §2.10). The function returns the previous value of the step multiplier.