--- /dev/null
+/*
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ */
+
+#define _LGPL_SOURCE
+#include <stdint.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+#include <lttng/ust-ringbuffer-context.h>
+
+#include "common/logging.h"
+#include "common/tracer.h"
+#include "common/jhash.h"
+
+
+/*
+ * Each library using the transports will have its local lists.
+ */
+static CDS_LIST_HEAD(lttng_transport_list);
+static CDS_LIST_HEAD(lttng_counter_transport_list);
+
+struct lttng_transport *lttng_ust_transport_find(const char *name)
+{
+ struct lttng_transport *transport;
+
+ cds_list_for_each_entry(transport, <tng_transport_list, node) {
+ if (!strcmp(transport->name, name))
+ return transport;
+ }
+ return NULL;
+}
+
+struct lttng_counter_transport *lttng_counter_transport_find(const char *name)
+{
+ struct lttng_counter_transport *transport;
+
+ cds_list_for_each_entry(transport, <tng_counter_transport_list, node) {
+ if (!strcmp(transport->name, name))
+ return transport;
+ }
+ return NULL;
+}
+
+/**
+ * lttng_transport_register - LTT transport registration
+ * @transport: transport structure
+ *
+ * Registers a transport which can be used as output to extract the data out of
+ * LTTng. Called with ust_lock held.
+ */
+void lttng_transport_register(struct lttng_transport *transport)
+{
+ cds_list_add_tail(&transport->node, <tng_transport_list);
+}
+
+/**
+ * lttng_transport_unregister - LTT transport unregistration
+ * @transport: transport structure
+ * Called with ust_lock held.
+ */
+void lttng_transport_unregister(struct lttng_transport *transport)
+{
+ cds_list_del(&transport->node);
+}
+
+/**
+ * lttng_counter_transport_register - LTTng counter transport registration
+ * @transport: transport structure
+ *
+ * Registers a counter transport which can be used as output to extract
+ * the data out of LTTng. Called with ust_lock held.
+ */
+void lttng_counter_transport_register(struct lttng_counter_transport *transport)
+{
+ cds_list_add_tail(&transport->node, <tng_counter_transport_list);
+}
+
+/**
+ * lttng_counter_transport_unregister - LTTng counter transport unregistration
+ * @transport: transport structure
+ * Called with ust_lock held.
+ */
+void lttng_counter_transport_unregister(struct lttng_counter_transport *transport)
+{
+ cds_list_del(&transport->node);
+}
+
+size_t lttng_ust_dummy_get_size(void *priv __attribute__((unused)),
+ struct lttng_ust_probe_ctx *probe_ctx __attribute__((unused)),
+ size_t offset)
+{
+ size_t size = 0;
+
+ size += lttng_ust_ring_buffer_align(offset, lttng_ust_rb_alignof(char));
+ size += sizeof(char); /* tag */
+ return size;
+}
+
+void lttng_ust_dummy_record(void *priv __attribute__((unused)),
+ struct lttng_ust_probe_ctx *probe_ctx __attribute__((unused)),
+ struct lttng_ust_ring_buffer_ctx *ctx,
+ struct lttng_ust_channel_buffer *chan)
+{
+ char sel_char = (char) LTTNG_UST_DYNAMIC_TYPE_NONE;
+
+ chan->ops->event_write(ctx, &sel_char, sizeof(sel_char), lttng_ust_rb_alignof(sel_char));
+}
+
+void lttng_ust_dummy_get_value(void *priv __attribute__((unused)),
+ struct lttng_ust_probe_ctx *probe_ctx __attribute__((unused)),
+ struct lttng_ust_ctx_value *value)
+{
+ value->sel = LTTNG_UST_DYNAMIC_TYPE_NONE;
+}
+
+int lttng_context_is_app(const char *name)
+{
+ if (strncmp(name, "$app.", strlen("$app.")) != 0) {
+ return 0;
+ }
+ return 1;
+}
+
+struct lttng_ust_channel_buffer *lttng_ust_alloc_channel_buffer(void)
+{
+ struct lttng_ust_channel_buffer *lttng_chan_buf;
+ struct lttng_ust_channel_common *lttng_chan_common;
+ struct lttng_ust_channel_buffer_private *lttng_chan_buf_priv;
+
+ lttng_chan_buf = zmalloc(sizeof(struct lttng_ust_channel_buffer));
+ if (!lttng_chan_buf)
+ goto lttng_chan_buf_error;
+ lttng_chan_buf->struct_size = sizeof(struct lttng_ust_channel_buffer);
+ lttng_chan_common = zmalloc(sizeof(struct lttng_ust_channel_common));
+ if (!lttng_chan_common)
+ goto lttng_chan_common_error;
+ lttng_chan_common->struct_size = sizeof(struct lttng_ust_channel_common);
+ lttng_chan_buf_priv = zmalloc(sizeof(struct lttng_ust_channel_buffer_private));
+ if (!lttng_chan_buf_priv)
+ goto lttng_chan_buf_priv_error;
+ lttng_chan_buf->parent = lttng_chan_common;
+ lttng_chan_common->type = LTTNG_UST_CHANNEL_TYPE_BUFFER;
+ lttng_chan_common->child = lttng_chan_buf;
+ lttng_chan_buf->priv = lttng_chan_buf_priv;
+ lttng_chan_common->priv = <tng_chan_buf_priv->parent;
+ lttng_chan_buf_priv->pub = lttng_chan_buf;
+ lttng_chan_buf_priv->parent.pub = lttng_chan_common;
+
+ return lttng_chan_buf;
+
+lttng_chan_buf_priv_error:
+ free(lttng_chan_common);
+lttng_chan_common_error:
+ free(lttng_chan_buf);
+lttng_chan_buf_error:
+ return NULL;
+}
+
+void lttng_ust_free_channel_common(struct lttng_ust_channel_common *chan)
+{
+ switch (chan->type) {
+ case LTTNG_UST_CHANNEL_TYPE_BUFFER:
+ {
+ struct lttng_ust_channel_buffer *chan_buf;
+
+ chan_buf = (struct lttng_ust_channel_buffer *)chan->child;
+ free(chan_buf->parent);
+ free(chan_buf->priv);
+ free(chan_buf);
+ break;
+ }
+ default:
+ abort();
+ }
+}
+