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comments for luaD_precall/luaD_poscall

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Roberto Ierusalimschy 2015-10-28 10:25:36 -02:00
parent 3cdf1d676b
commit ae515a346c
1 changed files with 12 additions and 2 deletions
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14
ldo.c
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@ -1,5 +1,5 @@
/* /*
** $Id: ldo.c,v 2.141 2015/10/21 18:40:47 roberto Exp roberto $ ** $Id: ldo.c,v 2.142 2015/10/28 12:06:45 roberto Exp roberto $
** Stack and Call structure of Lua ** Stack and Call structure of Lua
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -315,8 +315,13 @@ static void tryfuncTM (lua_State *L, StkId func) {
luaC_checkGC(L), /* stack grow uses memory */ \ luaC_checkGC(L), /* stack grow uses memory */ \
p = restorestack(L, t__)) /* 'pos' part: restore 'p' */ p = restorestack(L, t__)) /* 'pos' part: restore 'p' */
/* /*
** returns true if function has been executed (C function) ** Prepares a function call: checks the stack, creates a new CallInfo
** entry, fills in the relevant information, calls hook if needed.
** If function is a C function, does the call, too. (Otherwise, leave
** the execution ('luaV_execute') to the caller, to allow stackless
** calls.) Returns true iff function has been executed (C function).
*/ */
int luaD_precall (lua_State *L, StkId func, int nresults) { int luaD_precall (lua_State *L, StkId func, int nresults) {
lua_CFunction f; lua_CFunction f;
@ -381,6 +386,11 @@ int luaD_precall (lua_State *L, StkId func, int nresults) {
} }
/*
** Finishes a function call: calls hook if necessary, removes CallInfo,
** moves corrent number of results to proper place; returns 0 iff call
** wanted multiple (variable number of) results.
*/
int luaD_poscall (lua_State *L, StkId firstResult, int nres) { int luaD_poscall (lua_State *L, StkId firstResult, int nres) {
StkId res; StkId res;
int wanted, i; int wanted, i;