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More integration of 'nresults' into 'callstatus'

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This commit is contained in:
Roberto Ierusalimschy 2024-11-15 15:25:11 -03:00
parent a4762b6ffe
commit f12ce4029d
3 changed files with 33 additions and 28 deletions
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3
lapi.c
View File

@ -1023,9 +1023,6 @@ LUA_API int lua_setiuservalue (lua_State *L, int idx, int n) {
*/
#define MAXRESULTS 250
#define checkresults(L,na,nr) \
(api_check(L, (nr) == LUA_MULTRET \
|| (L->ci->top.p - L->top.p >= (nr) - (na)), \

25
ldo.c
View File

@ -564,12 +564,12 @@ void luaD_poscall (lua_State *L, CallInfo *ci, int nres) {
#define next_ci(L) (L->ci->next ? L->ci->next : luaE_extendCI(L))
l_sinline CallInfo *prepCallInfo (lua_State *L, StkId func, int nresults,
l_uint32 mask, StkId top) {
l_sinline CallInfo *prepCallInfo (lua_State *L, StkId func, unsigned status,
StkId top) {
CallInfo *ci = L->ci = next_ci(L); /* new frame */
ci->func.p = func;
lua_assert(((nresults + 1) & ~CIST_NRESULTS) == 0);
ci->callstatus = mask | cast(l_uint32, nresults + 1);
lua_assert((status & ~(CIST_NRESULTS | CIST_C)) == 0);
ci->callstatus = status;
ci->top.p = top;
return ci;
}
@ -578,12 +578,12 @@ l_sinline CallInfo *prepCallInfo (lua_State *L, StkId func, int nresults,
/*
** precall for C functions
*/
l_sinline int precallC (lua_State *L, StkId func, int nresults,
l_sinline int precallC (lua_State *L, StkId func, unsigned status,
lua_CFunction f) {
int n; /* number of returns */
CallInfo *ci;
checkstackp(L, LUA_MINSTACK, func); /* ensure minimum stack size */
L->ci = ci = prepCallInfo(L, func, nresults, CIST_C,
L->ci = ci = prepCallInfo(L, func, status | CIST_C,
L->top.p + LUA_MINSTACK);
lua_assert(ci->top.p <= L->stack_last.p);
if (l_unlikely(L->hookmask & LUA_MASKCALL)) {
@ -610,9 +610,9 @@ int luaD_pretailcall (lua_State *L, CallInfo *ci, StkId func,
retry:
switch (ttypetag(s2v(func))) {
case LUA_VCCL: /* C closure */
return precallC(L, func, LUA_MULTRET, clCvalue(s2v(func))->f);
return precallC(L, func, LUA_MULTRET + 1, clCvalue(s2v(func))->f);
case LUA_VLCF: /* light C function */
return precallC(L, func, LUA_MULTRET, fvalue(s2v(func)));
return precallC(L, func, LUA_MULTRET + 1, fvalue(s2v(func)));
case LUA_VLCL: { /* Lua function */
Proto *p = clLvalue(s2v(func))->p;
int fsize = p->maxstacksize; /* frame size */
@ -651,13 +651,15 @@ int luaD_pretailcall (lua_State *L, CallInfo *ci, StkId func,
** original function position.
*/
CallInfo *luaD_precall (lua_State *L, StkId func, int nresults) {
unsigned status = cast_uint(nresults + 1);
lua_assert(status <= MAXRESULTS + 1);
retry:
switch (ttypetag(s2v(func))) {
case LUA_VCCL: /* C closure */
precallC(L, func, nresults, clCvalue(s2v(func))->f);
precallC(L, func, status, clCvalue(s2v(func))->f);
return NULL;
case LUA_VLCF: /* light C function */
precallC(L, func, nresults, fvalue(s2v(func)));
precallC(L, func, status, fvalue(s2v(func)));
return NULL;
case LUA_VLCL: { /* Lua function */
CallInfo *ci;
@ -666,7 +668,7 @@ CallInfo *luaD_precall (lua_State *L, StkId func, int nresults) {
int nfixparams = p->numparams;
int fsize = p->maxstacksize; /* frame size */
checkstackp(L, fsize, func);
L->ci = ci = prepCallInfo(L, func, nresults, 0, func + 1 + fsize);
L->ci = ci = prepCallInfo(L, func, status, func + 1 + fsize);
ci->u.l.savedpc = p->code; /* starting point */
for (; narg < nfixparams; narg++)
setnilvalue(s2v(L->top.p++)); /* complete missing arguments */
@ -675,7 +677,6 @@ CallInfo *luaD_precall (lua_State *L, StkId func, int nresults) {
}
default: { /* not a function */
func = tryfuncTM(L, func); /* try to get '__call' metamethod */
/* return luaD_precall(L, func, nresults); */
goto retry; /* try again with metamethod */
}
}

33
lstate.h
View File

@ -209,34 +209,41 @@ struct CallInfo {
};
/*
** Maximum expected number of results from a function
** (must fit in CIST_NRESULTS).
*/
#define MAXRESULTS 250
/*
** Bits in CallInfo status
*/
/* bits 0-7 are the expected number of results from this function + 1 */
#define CIST_NRESULTS 0xff
#define CIST_NRESULTS 0xffu
/* Bits 8-10 are used for CIST_RECST (see below) */
#define CIST_RECST 8 /* the offset, not the mask */
/* original value of 'allowhook' */
#define CIST_OAH (cast(l_uint32, 1) << 8)
#define CIST_OAH (cast(l_uint32, 1) << 11)
/* call is running a C function */
#define CIST_C (cast(l_uint32, 1) << 9)
#define CIST_C (CIST_OAH << 1)
/* call is on a fresh "luaV_execute" frame */
#define CIST_FRESH (cast(l_uint32, 1) << 10)
#define CIST_FRESH (CIST_C << 1)
/* call is running a debug hook */
#define CIST_HOOKED (cast(l_uint32, 1) << 11)
#define CIST_HOOKED (CIST_FRESH << 1)
/* doing a yieldable protected call */
#define CIST_YPCALL (cast(l_uint32, 1) << 12)
#define CIST_YPCALL (CIST_HOOKED << 1)
/* call was tail called */
#define CIST_TAIL (cast(l_uint32, 1) << 13)
#define CIST_TAIL (CIST_YPCALL << 1)
/* last hook called yielded */
#define CIST_HOOKYIELD (cast(l_uint32, 1) << 14)
#define CIST_HOOKYIELD (CIST_TAIL << 1)
/* function "called" a finalizer */
#define CIST_FIN (cast(l_uint32, 1) << 15)
#define CIST_FIN (CIST_HOOKYIELD << 1)
/* function is closing tbc variables */
#define CIST_CLSRET (cast(l_uint32, 1) << 16)
/* Bits 17-19 are used for CIST_RECST (see below) */
#define CIST_RECST 17 /* the offset, not the mask */
#define CIST_CLSRET (CIST_FIN << 1)
#if defined(LUA_COMPAT_LT_LE)
/* using __lt for __le */
#define CIST_LEQ (cast(l_uint32, 1) << 20)
#define CIST_LEQ (CIST_CLSRET << 1)
#endif