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/*
* Copyright (c) 2002-2019 Balabit
* Copyright (c) 2019 Laszlo Budai
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*
*/
#include "late_ack_record_container.h"
typedef struct _DynamicLateAckRecordContainer
{
LateAckRecordContainer super;
GList *head;
GList *tail;
gsize size;
LateAckRecord *pending;
} DynamicLateAckRecordContainer;
static gboolean
_is_empty(const LateAckRecordContainer *s)
{
DynamicLateAckRecordContainer *self = (DynamicLateAckRecordContainer *) s;
return (!self->head || self->size == 0);
}
static LateAckRecord *
_request_pending(LateAckRecordContainer *s)
{
DynamicLateAckRecordContainer *self = (DynamicLateAckRecordContainer *)s;
if (self->pending)
return self->pending;
self->pending = g_new0(LateAckRecord, 1);
return self->pending;
}
static void
_store_pending(LateAckRecordContainer *s)
{
DynamicLateAckRecordContainer *self = (DynamicLateAckRecordContainer *) s;
if (self->head == NULL)
{
self->head = g_list_append(self->head, self->pending);
self->tail = self->head;
}
else
{
g_assert(g_list_append(self->tail, self->pending) == self->tail);
self->tail = self->tail->next;
}
self->size++;
self->pending = NULL;
}
static void
_free_and_destroy_ack_record(gpointer data)
{
LateAckRecord *rec = (LateAckRecord *)data;
late_ack_record_destroy(rec);
g_free(rec);
}
static void
_drop(LateAckRecordContainer *s, gsize n)
{
DynamicLateAckRecordContainer *self = (DynamicLateAckRecordContainer *) s;
if (n == self->size)
{
g_list_free_full(self->head, _free_and_destroy_ack_record);
self->head = self->tail = NULL;
self->size = 0;
return;
}
GList *delete_head = self->head;
GList *last = g_list_nth(self->head, n-1);
self->head = last->next;
self->head->prev = NULL;
self->size -= n;
last->next = NULL;
g_list_free_full(delete_head, _free_and_destroy_ack_record);
}
static LateAckRecord *
_at(const LateAckRecordContainer *s, gsize idx)
{
DynamicLateAckRecordContainer *self = (DynamicLateAckRecordContainer *) s;
return (LateAckRecord *) g_list_nth(self->head, idx)->data;
}
static void
_free(LateAckRecordContainer *s)
{
DynamicLateAckRecordContainer *self = (DynamicLateAckRecordContainer *)s;
if (self->pending)
{
late_ack_record_destroy(self->pending);
g_free(self->pending);
self->pending = NULL;
}
g_list_free_full(self->head, _free_and_destroy_ack_record);
self->head = NULL;
self->tail = NULL;
g_free(self);
}
static gsize
_size(const LateAckRecordContainer *s)
{
DynamicLateAckRecordContainer *self = (DynamicLateAckRecordContainer *)s;
return self->size;
}
static inline gboolean
_ack_range_is_continuous(void *data)
{
LateAckRecord *ack_rec = (LateAckRecord *)data;
return ack_rec->acked;
}
static gsize
_get_continual_range_length(const LateAckRecordContainer *s)
{
DynamicLateAckRecordContainer *self = (DynamicLateAckRecordContainer *)s;
guint32 ack_range_length = 0;
for (GList *it = self->head;
it != NULL && _ack_range_is_continuous(it->data);
it = it->next)
{
++ack_range_length;
}
return ack_range_length;
}
LateAckRecordContainer *
late_ack_record_container_dynamic_new(void)
{
DynamicLateAckRecordContainer *self = g_new0(DynamicLateAckRecordContainer, 1);
self->super.is_empty = _is_empty;
self->super.request_pending = _request_pending;
self->super.store_pending = _store_pending;
self->super.drop = _drop;
self->super.at = _at;
self->super.free_fn = _free;
self->super.size = _size;
self->super.get_continual_range_length = _get_continual_range_length;
return &self->super;
}
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