Move to kernel style SPDX license identifiers

[lttng-ust.git] / liblttng-ust / ust-core.c

diff --git a/liblttng-ust/ust-core.c b/liblttng-ust/ust-core.c
index 67e016007dd8bbb540d874b639f19738f7c6ef13..1ac726d9a69fc1f3e8b34461d5c5f22b5090ab70 100644 (file)
--- a/liblttng-ust/ust-core.c
+++ b/liblttng-ust/ust-core.c
@@ -1,47 +1,37 @@
 /*
- * ust-core.c
+ * SPDX-License-Identifier: LGPL-2.1-only
  *
  * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * 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; only
- * version 2.1 of the License.
- *
- * 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 Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#include <lttng/usterr-signal-safe.h>
-#include <lttng/ust-events.h>
+#define _LGPL_SOURCE
+#include <stdint.h>
+#include <stddef.h>
 #include <stdlib.h>
+#include <lttng/ust-events.h>
+#include <usterr-signal-safe.h>
+#include "lttng-tracer-core.h"
+#include "jhash.h"
 
-CDS_LIST_HEAD(ltt_transport_list);
+static CDS_LIST_HEAD(lttng_transport_list);
+static CDS_LIST_HEAD(lttng_counter_transport_list);
 
-void init_usterr(void)
+struct lttng_transport *lttng_transport_find(const char *name)
 {
-       char *ust_debug;
-
-       if (ust_loglevel == UST_LOGLEVEL_UNKNOWN) {
-               ust_debug = getenv("LTTNG_UST_DEBUG");
-               if (ust_debug)
-                       ust_loglevel = UST_LOGLEVEL_DEBUG;
-               else
-                       ust_loglevel = UST_LOGLEVEL_NORMAL;
+       struct lttng_transport *transport;
+
+       cds_list_for_each_entry(transport, &lttng_transport_list, node) {
+               if (!strcmp(transport->name, name))
+                       return transport;
        }
+       return NULL;
 }
 
-struct ltt_transport *ltt_transport_find(const char *name)
+struct lttng_counter_transport *lttng_counter_transport_find(const char *name)
 {
-       struct ltt_transport *transport;
+       struct lttng_counter_transport *transport;
 
-       cds_list_for_each_entry(transport, &ltt_transport_list, node) {
+       cds_list_for_each_entry(transport, &lttng_counter_transport_list, node) {
                if (!strcmp(transport->name, name))
                        return transport;
        }
@@ -49,23 +39,100 @@ struct ltt_transport *ltt_transport_find(const char *name)
 }
 
 /**
- * ltt_transport_register - LTT transport registration
+ * 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 ltt_transport_register(struct ltt_transport *transport)
+void lttng_transport_register(struct lttng_transport *transport)
+{
+       cds_list_add_tail(&transport->node, &lttng_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, &ltt_transport_list);
+       cds_list_add_tail(&transport->node, &lttng_counter_transport_list);
 }
 
 /**
- * ltt_transport_unregister - LTT transport unregistration
+ * lttng_counter_transport_unregister - LTTng counter transport unregistration
  * @transport: transport structure
  * Called with ust_lock held.
  */
-void ltt_transport_unregister(struct ltt_transport *transport)
+void lttng_counter_transport_unregister(struct lttng_counter_transport *transport)
 {
        cds_list_del(&transport->node);
 }
+
+/*
+ * Needed by comm layer.
+ */
+struct lttng_enum *lttng_ust_enum_get_from_desc(struct lttng_session *session,
+               const struct lttng_enum_desc *enum_desc)
+{
+       struct lttng_enum *_enum;
+       struct cds_hlist_head *head;
+       struct cds_hlist_node *node;
+       size_t name_len = strlen(enum_desc->name);
+       uint32_t hash;
+
+       hash = jhash(enum_desc->name, name_len, 0);
+       head = &session->enums_ht.table[hash & (LTTNG_UST_ENUM_HT_SIZE - 1)];
+       cds_hlist_for_each_entry(_enum, node, head, hlist) {
+               assert(_enum->desc);
+               if (_enum->desc == enum_desc)
+                       return _enum;
+       }
+       return NULL;
+}
+
+size_t lttng_ust_dummy_get_size(struct lttng_ctx_field *field, size_t offset)
+{
+       size_t size = 0;
+
+       size += lib_ring_buffer_align(offset, lttng_alignof(char));
+       size += sizeof(char);           /* tag */
+       return size;
+}
+
+void lttng_ust_dummy_record(struct lttng_ctx_field *field,
+                struct lttng_ust_lib_ring_buffer_ctx *ctx,
+                struct lttng_channel *chan)
+{
+       char sel_char = (char) LTTNG_UST_DYNAMIC_TYPE_NONE;
+
+       lib_ring_buffer_align_ctx(ctx, lttng_alignof(sel_char));
+       chan->ops->event_write(ctx, &sel_char, sizeof(sel_char));
+}
+
+void lttng_ust_dummy_get_value(struct lttng_ctx_field *field,
+               struct lttng_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;
+}