--- /dev/null
+/*
+ * Hobject allocation.
+ *
+ * Provides primitive allocation functions for all object types (plain object,
+ * compiled function, native function, thread). The object return is not yet
+ * in "heap allocated" list and has a refcount of zero, so caller must careful.
+ */
+
+#include "duk_internal.h"
+
+DUK_LOCAL void duk__init_object_parts(duk_heap *heap, duk_hobject *obj, duk_uint_t hobject_flags) {
+#ifdef DUK_USE_EXPLICIT_NULL_INIT
+ DUK_HOBJECT_SET_PROPS(heap, obj, NULL);
+#endif
+
+ /* XXX: macro? sets both heaphdr and object flags */
+ obj->hdr.h_flags = hobject_flags;
+ DUK_HEAPHDR_SET_TYPE(&obj->hdr, DUK_HTYPE_OBJECT); /* also goes into flags */
+
+#if defined(DUK_USE_HEAPPTR16)
+ /* Zero encoded pointer is required to match NULL */
+ DUK_HEAPHDR_SET_NEXT(heap, &obj->hdr, NULL);
+#if defined(DUK_USE_DOUBLE_LINKED_HEAP)
+ DUK_HEAPHDR_SET_PREV(heap, &obj->hdr, NULL);
+#endif
+#endif
+ DUK_ASSERT_HEAPHDR_LINKS(heap, &obj->hdr);
+ DUK_HEAP_INSERT_INTO_HEAP_ALLOCATED(heap, &obj->hdr);
+
+ /*
+ * obj->props is intentionally left as NULL, and duk_hobject_props.c must deal
+ * with this properly. This is intentional: empty objects consume a minimum
+ * amount of memory. Further, an initial allocation might fail and cause
+ * 'obj' to "leak" (require a mark-and-sweep) since it is not reachable yet.
+ */
+}
+
+/*
+ * Allocate an duk_hobject.
+ *
+ * The allocated object has no allocation for properties; the caller may
+ * want to force a resize if a desired size is known.
+ *
+ * The allocated object has zero reference count and is not reachable.
+ * The caller MUST make the object reachable and increase its reference
+ * count before invoking any operation that might require memory allocation.
+ */
+
+DUK_INTERNAL duk_hobject *duk_hobject_alloc(duk_heap *heap, duk_uint_t hobject_flags) {
+ duk_hobject *res;
+
+ DUK_ASSERT(heap != NULL);
+
+ /* different memory layout, alloc size, and init */
+ DUK_ASSERT((hobject_flags & DUK_HOBJECT_FLAG_COMPILEDFUNCTION) == 0);
+ DUK_ASSERT((hobject_flags & DUK_HOBJECT_FLAG_NATIVEFUNCTION) == 0);
+ DUK_ASSERT((hobject_flags & DUK_HOBJECT_FLAG_THREAD) == 0);
+
+ res = (duk_hobject *) DUK_ALLOC(heap, sizeof(duk_hobject));
+ if (!res) {
+ return NULL;
+ }
+ DUK_MEMZERO(res, sizeof(duk_hobject));
+
+ duk__init_object_parts(heap, res, hobject_flags);
+
+ return res;
+}
+
+DUK_INTERNAL duk_hcompiledfunction *duk_hcompiledfunction_alloc(duk_heap *heap, duk_uint_t hobject_flags) {
+ duk_hcompiledfunction *res;
+
+ res = (duk_hcompiledfunction *) DUK_ALLOC(heap, sizeof(duk_hcompiledfunction));
+ if (!res) {
+ return NULL;
+ }
+ DUK_MEMZERO(res, sizeof(duk_hcompiledfunction));
+
+ duk__init_object_parts(heap, &res->obj, hobject_flags);
+
+#ifdef DUK_USE_EXPLICIT_NULL_INIT
+#ifdef DUK_USE_HEAPPTR16
+ /* NULL pointer is required to encode to zero, so memset is enough. */
+#else
+ res->data = NULL;
+ res->funcs = NULL;
+ res->bytecode = NULL;
+#endif
+#endif
+
+ return res;
+}
+
+DUK_INTERNAL duk_hnativefunction *duk_hnativefunction_alloc(duk_heap *heap, duk_uint_t hobject_flags) {
+ duk_hnativefunction *res;
+
+ res = (duk_hnativefunction *) DUK_ALLOC(heap, sizeof(duk_hnativefunction));
+ if (!res) {
+ return NULL;
+ }
+ DUK_MEMZERO(res, sizeof(duk_hnativefunction));
+
+ duk__init_object_parts(heap, &res->obj, hobject_flags);
+
+#ifdef DUK_USE_EXPLICIT_NULL_INIT
+ res->func = NULL;
+#endif
+
+ return res;
+}
+
+DUK_INTERNAL duk_hbufferobject *duk_hbufferobject_alloc(duk_heap *heap, duk_uint_t hobject_flags) {
+ duk_hbufferobject *res;
+
+ res = (duk_hbufferobject *) DUK_ALLOC(heap, sizeof(duk_hbufferobject));
+ if (!res) {
+ return NULL;
+ }
+ DUK_MEMZERO(res, sizeof(duk_hbufferobject));
+
+ duk__init_object_parts(heap, &res->obj, hobject_flags);
+
+#ifdef DUK_USE_EXPLICIT_NULL_INIT
+ res->buf = NULL;
+#endif
+
+ DUK_ASSERT_HBUFFEROBJECT_VALID(res);
+ return res;
+}
+
+/*
+ * Allocate a new thread.
+ *
+ * Leaves the built-ins array uninitialized. The caller must either
+ * initialize a new global context or share existing built-ins from
+ * another thread.
+ */
+
+DUK_INTERNAL duk_hthread *duk_hthread_alloc(duk_heap *heap, duk_uint_t hobject_flags) {
+ duk_hthread *res;
+
+ res = (duk_hthread *) DUK_ALLOC(heap, sizeof(duk_hthread));
+ if (!res) {
+ return NULL;
+ }
+ DUK_MEMZERO(res, sizeof(duk_hthread));
+
+ duk__init_object_parts(heap, &res->obj, hobject_flags);
+
+#ifdef DUK_USE_EXPLICIT_NULL_INIT
+ res->ptr_curr_pc = NULL;
+ res->heap = NULL;
+ res->valstack = NULL;
+ res->valstack_end = NULL;
+ res->valstack_bottom = NULL;
+ res->valstack_top = NULL;
+ res->callstack = NULL;
+ res->catchstack = NULL;
+ res->resumer = NULL;
+ res->compile_ctx = NULL,
+#ifdef DUK_USE_HEAPPTR16
+ res->strs16 = NULL;
+#else
+ res->strs = NULL;
+#endif
+ {
+ int i;
+ for (i = 0; i < DUK_NUM_BUILTINS; i++) {
+ res->builtins[i] = NULL;
+ }
+ }
+#endif
+ /* when nothing is running, API calls are in non-strict mode */
+ DUK_ASSERT(res->strict == 0);
+
+ res->heap = heap;
+ res->valstack_max = DUK_VALSTACK_DEFAULT_MAX;
+ res->callstack_max = DUK_CALLSTACK_DEFAULT_MAX;
+ res->catchstack_max = DUK_CATCHSTACK_DEFAULT_MAX;
+
+ return res;
+}
+
+#if 0 /* unused now */
+DUK_INTERNAL duk_hobject *duk_hobject_alloc_checked(duk_hthread *thr, duk_uint_t hobject_flags) {
+ duk_hobject *res = duk_hobject_alloc(thr->heap, hobject_flags);
+ if (!res) {
+ DUK_ERROR_ALLOC_DEFMSG(thr);
+ }
+ return res;
+}
+#endif
projects / ceph.git / blobdiff