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No more field 'lua_State.stacksize'

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The stack size is derived from 'stack_last', when needed. Moreover,
the handling of stack sizes is more consistent, always excluding the
extra space except when allocating/deallocating the array.
This commit is contained in:
Roberto Ierusalimschy
2020-10-06 15:50:24 -03:00
parent 9ecd446141
commit 5aa36e894f
6 changed files with 29 additions and 26 deletions
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8
lstate.c
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@@ -180,12 +180,11 @@ LUAI_FUNC void luaE_incCstack (lua_State *L) {
static void stack_init (lua_State *L1, lua_State *L) {
int i; CallInfo *ci;
/* initialize stack array */
L1->stack = luaM_newvector(L, BASIC_STACK_SIZE, StackValue);
L1->stacksize = BASIC_STACK_SIZE;
L1->stack = luaM_newvector(L, BASIC_STACK_SIZE + EXTRA_STACK, StackValue);
for (i = 0; i < BASIC_STACK_SIZE; i++)
setnilvalue(s2v(L1->stack + i)); /* erase new stack */
L1->top = L1->stack;
L1->stack_last = L1->stack + L1->stacksize - EXTRA_STACK;
L1->stack_last = L1->stack + BASIC_STACK_SIZE;
/* initialize first ci */
ci = &L1->base_ci;
ci->next = ci->previous = NULL;
@@ -206,7 +205,7 @@ static void freestack (lua_State *L) {
L->ci = &L->base_ci; /* free the entire 'ci' list */
luaE_freeCI(L);
lua_assert(L->nci == 0);
luaM_freearray(L, L->stack, L->stacksize); /* free stack array */
luaM_freearray(L, L->stack, stacksize(L) + EXTRA_STACK); /* free stack */
}
@@ -256,7 +255,6 @@ static void preinit_thread (lua_State *L, global_State *g) {
L->stack = NULL;
L->ci = NULL;
L->nci = 0;
L->stacksize = 0;
L->twups = L; /* thread has no upvalues */
L->errorJmp = NULL;
L->hook = NULL;