return btr_pool_size(btrp) - btr_pool_filled(btrp);
}
+/*
+ * Return maximal size available for one read. This is
+ * smaller than the value returned by btr_pool_unused().
+ */
size_t btr_pool_available(struct btr_pool *btrp)
{
if (!btrp->whead)
#define FOR_EACH_BUFFER_REF_SAFE(_br, _tmp, _btrn) \
list_for_each_entry_safe((_br), (_tmp), &(_btrn)->input_queue, node)
-struct btr_node *btr_new_node(const char *name, struct btr_node *parent,
- btr_command_handler handler, void *context)
+/*
+ (parent, child):
+ (NULL, NULL): new, isolated node.
+ (NULL, c): new node becomes root, c must be old root
+ (p, NULL): new leaf node
+ (p, c): new internal node, ch must be child of p
+
+*/
+struct btr_node *btr_new_node(struct btr_node_description *bnd)
{
struct btr_node *btrn = para_malloc(sizeof(*btrn));
- btrn->name = para_strdup(name);
- btrn->parent = parent;
- btrn->execute = handler;
- btrn->context = context;
+ btrn->name = para_strdup(bnd->name);
+ btrn->parent = bnd->parent;
+ btrn->execute = bnd->handler;
+ btrn->context = bnd->context;
btrn->start.tv_sec = 0;
btrn->start.tv_usec = 0;
- if (parent)
- list_add_tail(&btrn->node, &parent->children);
+ if (bnd->parent)
+ list_add_tail(&btrn->node, &bnd->parent->children);
INIT_LIST_HEAD(&btrn->children);
INIT_LIST_HEAD(&btrn->input_queue);
- if (parent)
- PARA_INFO_LOG("added %s as child of %s\n", name, parent->name);
+ if (bnd->parent)
+ PARA_INFO_LOG("added %s as child of %s\n", bnd->name, bnd->parent->name);
else
- PARA_INFO_LOG("added %s as btr root\n", name);
+ PARA_INFO_LOG("added %s as btr root\n", bnd->name);
return btrn;
}
size_t btr_get_input_queue_size(struct btr_node *btrn)
{
struct btr_buffer_reference *br;
- size_t size = 0;
+ size_t size = 0, wrap_consumed = 0;
FOR_EACH_BUFFER_REF(br, btrn) {
- //PARA_CRIT_LOG("size: %zu\n", size);
+ if (br->wrap_count != 0) {
+ wrap_consumed = br->consumed;
+ continue;
+ }
size += br_available_bytes(br);
}
+ assert(wrap_consumed <= size);
+ size -= wrap_consumed;
return size;
}
static void merge_input_pool(struct btr_node *btrn, size_t dest_size)
{
- struct btr_buffer_reference *br, *wbr;
+ struct btr_buffer_reference *br, *wbr = NULL;
int num_refs; /* including wrap buffer */
- char *buf, *buf1, *buf2 = NULL;
- size_t sz, sz1, sz2 = 0, wsz;
+ char *buf, *buf1 = NULL, *buf2 = NULL;
+ size_t sz, sz1 = 0, sz2 = 0, wsz;
- if (list_empty(&btrn->input_queue))
+ br = get_first_input_br(btrn);
+ if (!br || br_available_bytes(br) >= dest_size)
return;
-
num_refs = 0;
FOR_EACH_BUFFER_REF(br, btrn) {
num_refs++;
sz = btr_get_buffer_by_reference(br, &buf);
+ if (sz == 0)
+ break;
if (br->wrap_count != 0) {
assert(!wbr);
assert(num_refs == 1);
if (sz1 + sz2 >= dest_size)
break;
}
+ if (!buf2) /* nothing to do */
+ return;
+ assert(buf1 && sz2 > 0);
+ /*
+ * If the second buffer is large, we only take the first part of it to
+ * avoid having to memcpy() huge buffers.
+ */
+ sz2 = PARA_MIN(sz2, (size_t)(64 * 1024));
if (!wbr) {
- assert(buf1);
- if (!buf2) /* nothing to do */
- return;
- /* make a new wrap buffer combining buf1 and buf 2. */
+ /* Make a new wrap buffer combining buf1 and buf2. */
sz = sz1 + sz2;
buf = para_malloc(sz);
PARA_DEBUG_LOG("merging input buffers: (%p:%zu, %p:%zu) -> %p:%zu\n",
para_list_add(&br->node, &btrn->input_queue);
return;
}
+ PARA_DEBUG_LOG("increasing wrap buffer, sz1: %zu, sz2: %zu\n", sz1, sz2);
/*
* We already have a wrap buffer, but it is too small. It might be
* partially used.
wsz = br_available_bytes(wbr);
if (wbr->wrap_count == sz1 && wbr->btrb->size >= sz1 + sz2) /* nothing we can do about it */
return;
- assert(buf1 && buf2);
sz = sz1 + sz2 - wbr->btrb->size; /* amount of new data */
wbr->btrb->size += sz;
- PARA_DEBUG_LOG("increasing wrap buffer to %zu\n", wbr->btrb->size);
wbr->btrb->buf = para_realloc(wbr->btrb->buf, wbr->btrb->size);
/* copy the new data to the end of the reallocated buffer */
assert(sz2 >= sz);
return log_tree_recursively(btrn, loglevel, 0);
}
+/*
+ * \return \a root if \a name is \p NULL.
+ */
+struct btr_node *btr_search_node(const char *name, struct btr_node *root)
+{
+ struct btr_node *ch;
+
+ if (!name)
+ return root;
+ if (!strcmp(root->name, name))
+ return root;
+ FOR_EACH_CHILD(ch, root) {
+ struct btr_node *result = btr_search_node(name, ch);
+ if (result)
+ return result;
+ }
+ return NULL;
+}
+
/** 640K ought to be enough for everybody ;) */
#define BTRN_MAX_PENDING (640 * 1024)
{
size_t iqs;
+ assert(btrn);
if (type != BTR_NT_LEAF) {
if (btr_no_children(btrn))
return -E_BTR_NO_CHILD;
projects / paraslash.git / blobdiff