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LUAI_MAXSTACK defined privately

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LUAI_MAXSTACK is limited to INT_MAX/2, so can use INT_MAX/2 to define
pseudo-indices (LUA_REGISTRYINDEX) in 'lua.h'. A change in the maximum
stack size does not need to change the Lua-C ABI.
This commit is contained in:
Roberto Ierusalimschy
2025-07-01 10:57:02 -03:00
parent cfce6f4b20
commit 59a1adf194
4 changed files with 17 additions and 18 deletions
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14
luaconf.h
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@@ -763,20 +763,6 @@
** =====================================================================
*/
/*
@@ LUAI_MAXSTACK limits the size of the Lua stack.
** CHANGE it if you need a different limit. This limit is arbitrary;
** its only purpose is to stop Lua from consuming unlimited stack
** space and to reserve some numbers for pseudo-indices.
** (It must fit into max(int)/2.)
*/
#if 1000000 < (INT_MAX / 2)
#define LUAI_MAXSTACK 1000000
#else
#define LUAI_MAXSTACK (INT_MAX / 2u)
#endif
/*
@@ LUA_EXTRASPACE defines the size of a raw memory area associated with
** a Lua state with very fast access.