126 lines
4.1 KiB
C
126 lines
4.1 KiB
C
/*
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** $Id: linit.c,v 1.14.1.1 2007/12/27 13:02:25 roberto Exp $
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** Initialization of libraries for lua.c
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** See Copyright Notice in lua.h
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*/
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#define linit_c
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#define LUA_LIB
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#define LUAC_CROSS_FILE
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#include "lua.h"
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#include "lualib.h"
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#include "lauxlib.h"
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#include "luaconf.h"
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#include "module.h"
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#include "lstate.h"
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#include <assert.h>
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#include <stdalign.h>
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LROT_EXTERN(strlib);
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LROT_EXTERN(tab_funcs);
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LROT_EXTERN(dblib);
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LROT_EXTERN(co_funcs);
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LROT_EXTERN(math);
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#if defined(LUA_CROSS_COMPILER)
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LROT_EXTERN(oslib);
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//LROT_EXTERN(iolib);
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#endif
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/*
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* The NodeMCU Lua initalisation has been adapted to use linker-based module
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* registration. This uses a PSECT naming convention to allow the ROTable and
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* initialisation function entries to be collected by the linker into two
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* consoliated ROTables. This significantly simplifies adding new modules and
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* configuring builds with a small subset of the total modules.
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*
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* This linker-based approach is not practical for cross compiler builds which
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* must link on a range of platforms, and where we don't have control of PSECT
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* placement. However unlike the target builds, the luac.cross builds only
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* used a small and fixed list of libraries and so in this case the table can
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* be defined in this source file, so in this case all library ROTables are
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* defined here, avoiding the need for linker magic is avoided on host builds.
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*
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* Note that a separate ROTable is defined in lbaselib.c for the base functions
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* and there is a metatable index cascade from _G to this base function table to
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* the master rotables table. In the target build, the linker marshals the
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* table, hence the LROT_BREAK() macros which don't 0 terminate the lists.
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*/
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#ifdef _MSC_VER
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//MSVC requires us to declare these sections before we refer to them
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#pragma section(__ROSECNAME(A), read)
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#pragma section(__ROSECNAME(zzzzzzzz), read)
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#pragma section(__ROSECNAME(libs), read)
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#pragma section(__ROSECNAME(rotable), read)
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//These help us to find the beginning and ending of the RO data. NOTE: linker
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//magic is used; the section names are lexically sorted, so 'a' and 'z' are
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//important to keep the other sections lexically between these two dummy
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//variables. Check your mapfile output if you need to fiddle with this stuff.
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const LOCK_IN_SECTION(A) char _ro_start[1] = {0};
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const LOCK_IN_SECTION(zzzzzzzz) char _ro_end[1] = {0};
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#endif
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LROT_PUBLIC_BEGIN(LOCK_IN_SECTION(rotable) lua_rotables)
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LROT_TABENTRY( string, strlib )
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LROT_TABENTRY( table, tab_funcs )
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LROT_TABENTRY( debug, dblib)
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LROT_TABENTRY( coroutine, co_funcs )
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LROT_TABENTRY( math, math )
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LROT_TABENTRY( ROM, lua_rotables )
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#ifdef LUA_CROSS_COMPILER
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LROT_TABENTRY( os, oslib )
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//LROT_TABENTRY( io, iolib )
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LROT_END(lua_rotables, NULL, 0)
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#else
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LROT_BREAK(lua_rotables)
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#endif
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LROT_PUBLIC_BEGIN(LOCK_IN_SECTION(libs) lua_libs)
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LROT_FUNCENTRY( _, luaopen_base )
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LROT_FUNCENTRY( package, luaopen_package )
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LROT_FUNCENTRY( string, luaopen_string )
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LROT_FUNCENTRY( table, luaopen_table )
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LROT_FUNCENTRY( debug, luaopen_debug )
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#ifndef LUA_CROSS_COMPILER
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LROT_BREAK(lua_rotables)
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#else
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LROT_FUNCENTRY( io, luaopen_io )
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LROT_END( lua_libs, NULL, 0)
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#endif
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#ifndef LUA_CROSS_COMPILER
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extern void luaL_dbgbreak(void);
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#endif
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void luaL_openlibs (lua_State *L) {
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lua_pushrotable(L, LROT_TABLEREF(lua_libs));
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lua_pushnil(L); /* first key */
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/* loop round and open libraries */
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#ifndef LUA_CROSS_COMPILER
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// luaL_dbgbreak(); // This is a test point for debugging library start ups
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#endif
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while (lua_next(L, -2) != 0) {
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if (lua_islightfunction(L,-1) &&
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fvalue(L->top-1)) { // only process function entries
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lua_pushvalue(L, -2);
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lua_call(L, 1, 0); // call luaopen_XXX(libname)
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} else {
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lua_pop(L, 1);
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}
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}
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lua_pop(L, 1); //cleanup stack
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}
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#ifndef LUA_CROSS_COMPILER
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# ifdef LUA_NUMBER_INTEGRAL
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# define COMPARE <=
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# else
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# define COMPARE ==
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# endif
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_Static_assert(_Alignof(luaR_entry) COMPARE 8, "Unexpected alignment of module registration - update the linker script snippets to match!");
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_Static_assert(sizeof(luaR_entry) COMPARE 24, "Unexpect size of array member - update the linker script snippets to match!");
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#endif
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