X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fnotification.c;fp=src%2Fcommon%2Fnotification.c;h=5062ca5b1afa16f26340871a878801723ffce825;hp=0000000000000000000000000000000000000000;hb=a58c490f0bff52a73717d31d04d1472629180de2;hpb=db5be0a3dcf30edeca9c3143682454bab9523f71

diff --git a/src/common/notification.c b/src/common/notification.c
new file mode 100644
index 000000000..5062ca5b1
--- /dev/null
+++ b/src/common/notification.c
@@ -0,0 +1,176 @@
+/*
+ * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@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, version 2.1 only,
+ * as published by the Free Software Foundation.
+ *
+ * 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/notification/notification-internal.h>
+#include <lttng/condition/condition-internal.h>
+#include <lttng/condition/evaluation-internal.h>
+#include <lttng/condition/condition.h>
+#include <lttng/condition/evaluation.h>
+#include <assert.h>
+
+LTTNG_HIDDEN
+struct lttng_notification *lttng_notification_create(
+		struct lttng_condition *condition,
+		struct lttng_evaluation *evaluation)
+{
+	struct lttng_notification *notification = NULL;
+
+	if (!condition || !evaluation) {
+		goto end;
+	}
+
+	notification = zmalloc(sizeof(struct lttng_notification));
+	if (!notification) {
+		goto end;
+	}
+
+	notification->condition = condition;
+	notification->evaluation = evaluation;
+	notification->owns_elements = false;
+end:
+	return notification;
+}
+
+LTTNG_HIDDEN
+ssize_t lttng_notification_serialize(struct lttng_notification *notification,
+		char *buf)
+{
+	ssize_t ret, condition_size, evaluation_size, offset = 0;
+	struct lttng_notification_comm notification_comm;
+
+	if (!notification) {
+		ret = -1;
+		goto end;
+	}
+
+	offset += sizeof(notification_comm);
+	condition_size = lttng_condition_serialize(notification->condition,
+			buf ? (buf + offset) : NULL);
+	if (condition_size < 0) {
+		ret = condition_size;
+		goto end;
+	}
+	offset += condition_size;
+
+	evaluation_size = lttng_evaluation_serialize(notification->evaluation,
+			buf ? (buf + offset) : NULL);
+	if (evaluation_size < 0) {
+		ret = evaluation_size;
+		goto end;
+	}
+	offset += evaluation_size;
+
+	if (buf) {
+		notification_comm.length =
+				(uint32_t) (condition_size + evaluation_size);
+		memcpy(buf, &notification_comm, sizeof(notification_comm));
+	}
+	ret = offset;
+end:
+	return ret;
+
+}
+
+LTTNG_HIDDEN
+ssize_t lttng_notification_create_from_buffer(
+		const struct lttng_buffer_view *src_view,
+		struct lttng_notification **notification)
+{
+	ssize_t ret, notification_size = 0, condition_size, evaluation_size;
+	const struct lttng_notification_comm *notification_comm;
+	struct lttng_condition *condition;
+	struct lttng_evaluation *evaluation;
+	struct lttng_buffer_view condition_view;
+	struct lttng_buffer_view evaluation_view;
+
+	if (!src_view || !notification) {
+		ret = -1;
+		goto end;
+	}
+
+	notification_comm =
+			(const struct lttng_notification_comm *) src_view->data;
+	notification_size += sizeof(*notification_comm);
+
+	/* struct lttng_condition */
+	condition_view = lttng_buffer_view_from_view(src_view,
+			sizeof(*notification_comm), -1);
+	condition_size = lttng_condition_create_from_buffer(&condition_view,
+			&condition);
+	if (condition_size < 0) {
+		ret = condition_size;
+		goto end;
+	}
+	notification_size += condition_size;
+
+	/* struct lttng_evaluation */
+	evaluation_view = lttng_buffer_view_from_view(&condition_view,
+			condition_size, -1);
+	evaluation_size = lttng_evaluation_create_from_buffer(&evaluation_view,
+			&evaluation);
+	if (evaluation_size < 0) {
+		ret = evaluation_size;
+		goto end;
+	}
+	notification_size += evaluation_size;
+
+	/* Unexpected size of inner-elements; the buffer is corrupted. */
+	if ((ssize_t) notification_comm->length !=
+			condition_size + evaluation_size) {
+		ret = -1;
+		goto error;
+	}
+
+	*notification = lttng_notification_create(condition, evaluation);
+	if (!*notification) {
+		ret = -1;
+		goto error;
+	}
+	ret = notification_size;
+	(*notification)->owns_elements = true;
+end:
+	return ret;
+error:
+	lttng_condition_destroy(condition);
+	lttng_evaluation_destroy(evaluation);
+	return ret;
+}
+
+void lttng_notification_destroy(struct lttng_notification *notification)
+{
+	if (!notification) {
+		return;
+	}
+
+	if (notification->owns_elements) {
+		lttng_condition_destroy(notification->condition);
+		lttng_evaluation_destroy(notification->evaluation);
+	}
+	free(notification);
+}
+
+const struct lttng_condition *lttng_notification_get_condition(
+		struct lttng_notification *notification)
+{
+	return notification ? notification->condition : NULL;
+}
+
+const struct lttng_evaluation *lttng_notification_get_evaluation(
+		struct lttng_notification *notification)
+{
+	return notification ? notification->evaluation : NULL;
+}