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simplified the handling of closures

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Fabrice Bellard 2025-03-13 17:44:55 +01:00
parent dfd9c93ab0
commit 9bd10d8eb9
1 changed files with 16 additions and 22 deletions
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38
quickjs.c
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@ -363,10 +363,7 @@ typedef struct JSVarRef {
struct {
int __gc_ref_count; /* corresponds to header.ref_count */
uint8_t __gc_mark; /* corresponds to header.mark/gc_obj_type */
uint8_t is_detached : 1;
uint8_t is_arg : 1;
uint16_t var_idx; /* index of the corresponding function variable on
the stack */
uint8_t is_detached;
};
};
JSValue *pvalue; /* pointer to the value, either on the stack or
@ -15673,10 +15670,16 @@ static JSVarRef *get_var_ref(JSContext *ctx, JSStackFrame *sf,
{
JSVarRef *var_ref;
struct list_head *el;
JSValue *pvalue;
if (is_arg)
pvalue = &sf->arg_buf[var_idx];
else
pvalue = &sf->var_buf[var_idx];
list_for_each(el, &sf->var_ref_list) {
var_ref = list_entry(el, JSVarRef, var_ref_link);
if (var_ref->var_idx == var_idx && var_ref->is_arg == is_arg) {
if (var_ref->pvalue == pvalue) {
var_ref->header.ref_count++;
return var_ref;
}
@ -15688,8 +15691,6 @@ static JSVarRef *get_var_ref(JSContext *ctx, JSStackFrame *sf,
var_ref->header.ref_count = 1;
add_gc_object(ctx->rt, &var_ref->header, JS_GC_OBJ_TYPE_VAR_REF);
var_ref->is_detached = FALSE;
var_ref->is_arg = is_arg;
var_ref->var_idx = var_idx;
list_add_tail(&var_ref->var_ref_link, &sf->var_ref_list);
if (sf->js_mode & JS_MODE_ASYNC) {
/* The stack frame is detached and may be destroyed at any
@ -15705,10 +15706,7 @@ static JSVarRef *get_var_ref(JSContext *ctx, JSStackFrame *sf,
} else {
var_ref->async_func = NULL;
}
if (is_arg)
var_ref->pvalue = &sf->arg_buf[var_idx];
else
var_ref->pvalue = &sf->var_buf[var_idx];
var_ref->pvalue = pvalue;
return var_ref;
}
@ -15936,37 +15934,33 @@ static void close_var_refs(JSRuntime *rt, JSStackFrame *sf)
{
struct list_head *el, *el1;
JSVarRef *var_ref;
int var_idx;
list_for_each_safe(el, el1, &sf->var_ref_list) {
var_ref = list_entry(el, JSVarRef, var_ref_link);
/* no need to unlink var_ref->var_ref_link as the list is never used afterwards */
if (var_ref->async_func)
async_func_free(rt, var_ref->async_func);
var_idx = var_ref->var_idx;
if (var_ref->is_arg)
var_ref->value = JS_DupValueRT(rt, sf->arg_buf[var_idx]);
else
var_ref->value = JS_DupValueRT(rt, sf->var_buf[var_idx]);
var_ref->value = JS_DupValueRT(rt, *var_ref->pvalue);
var_ref->pvalue = &var_ref->value;
/* the reference is no longer to a local variable */
var_ref->is_detached = TRUE;
}
}
static void close_lexical_var(JSContext *ctx, JSStackFrame *sf, int idx, int is_arg)
static void close_lexical_var(JSContext *ctx, JSStackFrame *sf, int var_idx)
{
JSValue *pvalue;
struct list_head *el, *el1;
JSVarRef *var_ref;
int var_idx = idx;
pvalue = &sf->var_buf[var_idx];
list_for_each_safe(el, el1, &sf->var_ref_list) {
var_ref = list_entry(el, JSVarRef, var_ref_link);
if (var_idx == var_ref->var_idx && var_ref->is_arg == is_arg) {
if (var_ref->pvalue == pvalue) {
list_del(&var_ref->var_ref_link);
if (var_ref->async_func)
async_func_free(ctx->rt, var_ref->async_func);
var_ref->value = JS_DupValue(ctx, sf->var_buf[var_idx]);
var_ref->value = JS_DupValue(ctx, *var_ref->pvalue);
var_ref->pvalue = &var_ref->value;
/* the reference is no longer to a local variable */
var_ref->is_detached = TRUE;
@ -17199,7 +17193,7 @@ static JSValue JS_CallInternal(JSContext *caller_ctx, JSValueConst func_obj,
int idx;
idx = get_u16(pc);
pc += 2;
close_lexical_var(ctx, sf, idx, FALSE);
close_lexical_var(ctx, sf, idx);
}
BREAK;