From 1c1baa42c8a2c047f938a442d776f33320013c0c Mon Sep 17 00:00:00 2001 From: Matthew Wild Date: Sun, 8 Jul 2012 18:54:30 +0100 Subject: util.pposix: Add comments to mallinfo fields we use, so I don't forget tomorrow what they mean --- util-src/pposix.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'util-src') diff --git a/util-src/pposix.c b/util-src/pposix.c index 8dfd6c75..65f8b4ab 100644 --- a/util-src/pposix.c +++ b/util-src/pposix.c @@ -622,14 +622,20 @@ int lc_meminfo(lua_State* L) { struct mallinfo info = mallinfo(); lua_newtable(L); + /* This is the total size of memory allocated with sbrk by malloc, in bytes. */ lua_pushinteger(L, info.arena); lua_setfield(L, -2, "allocated"); + /* This is the total size of memory allocated with mmap, in bytes. */ lua_pushinteger(L, info.hblkhd); lua_setfield(L, -2, "allocated_mmap"); + /* This is the total size of memory occupied by chunks handed out by malloc. */ lua_pushinteger(L, info.uordblks); lua_setfield(L, -2, "used"); + /* This is the total size of memory occupied by free (not in use) chunks. */ lua_pushinteger(L, info.fordblks); lua_setfield(L, -2, "unused"); + /* This is the size of the top-most releasable chunk that normally borders the + end of the heap (i.e., the high end of the virtual address space's data segment). */ lua_pushinteger(L, info.keepcost); lua_setfield(L, -2, "returnable"); return 1; -- cgit v1.2.3