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roots.c
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roots.c
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#include "gc/roots.h"
#include "internal.h" // IWYU pragma: keep
#include <stddef.h>
#include <stdlib.h>
static ant_value_t *g_roots[GC_MAX_STATIC_ROOTS];
static size_t g_root_count = 0;
void gc_register_root(ant_value_t *slot) {
if (g_root_count < GC_MAX_STATIC_ROOTS)
g_roots[g_root_count++] = slot;
}
size_t gc_root_scope(ant_t *js) {
return js ? js->c_root_count : 0;
}
bool gc_push_root(ant_t *js, ant_value_t *slot) {
if (!js || !slot) return false;
if (js->c_root_count >= js->c_root_cap) {
size_t new_cap = js->c_root_cap ? js->c_root_cap * 2 : 64;
ant_value_t **next = realloc(js->c_roots, new_cap * sizeof(*next));
if (!next) return false;
js->c_roots = next;
js->c_root_cap = new_cap;
}
js->c_roots[js->c_root_count++] = slot;
return true;
}
void gc_pop_roots(ant_t *js, size_t mark) {
if (!js) return;
js->c_root_count = (mark <= js->c_root_count) ? mark : 0;
}
void gc_temp_root_scope_begin(ant_t *js, gc_temp_root_scope_t *scope) {
if (!scope) return;
scope->js = js;
scope->items = NULL;
scope->len = 0;
scope->cap = 0;
scope->prev = js ? js->temp_roots : NULL;
if (js) js->temp_roots = scope;
}
void gc_temp_root_scope_end(gc_temp_root_scope_t *scope) {
if (!scope) return;
ant_t *js = scope->js;
if (js && js->temp_roots == scope) js->temp_roots = scope->prev;
free(scope->items);
scope->items = NULL;
scope->len = 0;
scope->cap = 0;
scope->prev = NULL;
scope->js = NULL;
}
gc_temp_root_handle_t gc_temp_root_add(gc_temp_root_scope_t *scope, ant_value_t value) {
gc_temp_root_handle_t invalid = {0};
if (!scope) return invalid;
if (scope->len >= scope->cap) {
size_t new_cap = scope->cap ? scope->cap * 2 : 16;
ant_value_t *next = realloc(scope->items, new_cap * sizeof(*next));
if (!next) return invalid;
scope->items = next;
scope->cap = new_cap;
}
size_t index = scope->len++;
scope->items[index] = value;
gc_temp_root_handle_t handle = {
.scope = scope,
.index = index,
};
return handle;
}
bool gc_temp_root_set(gc_temp_root_handle_t handle, ant_value_t value) {
if (!handle.scope || handle.index >= handle.scope->len) return false;
handle.scope->items[handle.index] = value;
return true;
}
ant_value_t gc_temp_root_get(gc_temp_root_handle_t handle) {
if (!handle.scope || handle.index >= handle.scope->len) return js_mkundef();
return handle.scope->items[handle.index];
}
void gc_visit_roots(ant_t *js, gc_root_visitor_t visitor) {
for (size_t i = 0; i < g_root_count; i++)
if (g_roots[i] && *g_roots[i]) visitor(js, *g_roots[i]);
if (!js) return;
for (size_t i = 0; i < js->c_root_count; i++) {
ant_value_t *slot = js->c_roots[i];
if (slot && *slot) visitor(js, *slot);
}
for (gc_temp_root_scope_t *scope = js->temp_roots; scope; scope = scope->prev)
for (size_t i = 0; i < scope->len; i++) if (scope->items[i]) visitor(js, scope->items[i]);
}

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