X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fevaluation.c;fp=src%2Fcommon%2Fevaluation.c;h=c6243d232e82690ab9ca4a39cea3ed4aff1de974;hp=0000000000000000000000000000000000000000;hb=a58c490f0bff52a73717d31d04d1472629180de2;hpb=db5be0a3dcf30edeca9c3143682454bab9523f71

diff --git a/src/common/evaluation.c b/src/common/evaluation.c
new file mode 100644
index 000000000..c6243d232
--- /dev/null
+++ b/src/common/evaluation.c
@@ -0,0 +1,113 @@
+/*
+ * 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/condition/evaluation-internal.h>
+#include <lttng/condition/buffer-usage-internal.h>
+#include <common/macros.h>
+#include <common/error.h>
+#include <stdbool.h>
+#include <assert.h>
+
+LTTNG_HIDDEN
+ssize_t lttng_evaluation_serialize(struct lttng_evaluation *evaluation,
+		char *buf)
+{
+	ssize_t ret, offset = 0;
+	struct lttng_evaluation_comm evaluation_comm;
+
+	evaluation_comm.type = (int8_t) evaluation->type;
+	if (buf) {
+		memcpy(buf, &evaluation_comm, sizeof(evaluation_comm));
+	}
+	offset += sizeof(evaluation_comm);
+
+	if (evaluation->serialize) {
+		ret = evaluation->serialize(evaluation,
+				buf ? (buf + offset) : NULL);
+		if (ret < 0) {
+			goto end;
+		}
+		offset += ret;
+	}
+
+	ret = offset;
+end:
+	return ret;
+}
+
+LTTNG_HIDDEN
+ssize_t lttng_evaluation_create_from_buffer(
+		const struct lttng_buffer_view *src_view,
+		struct lttng_evaluation **evaluation)
+{
+	ssize_t ret, evaluation_size = 0;
+	const struct lttng_evaluation_comm *evaluation_comm;
+	const struct lttng_buffer_view evaluation_view =
+			lttng_buffer_view_from_view(src_view,
+			sizeof(*evaluation_comm), -1);
+
+	if (!src_view || !evaluation) {
+		ret = -1;
+		goto end;
+	}
+
+	evaluation_comm = (const struct lttng_evaluation_comm *) src_view->data;
+	evaluation_size += sizeof(*evaluation_comm);
+
+	switch ((enum lttng_condition_type) evaluation_comm->type) {
+	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
+		ret = lttng_evaluation_buffer_usage_low_create_from_buffer(
+				&evaluation_view, evaluation);
+		if (ret < 0) {
+			goto end;
+		}
+		evaluation_size += ret;
+		break;
+	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
+		ret = lttng_evaluation_buffer_usage_high_create_from_buffer(
+				&evaluation_view, evaluation);
+		if (ret < 0) {
+			goto end;
+		}
+		evaluation_size += ret;
+		break;
+	default:
+		ERR("Attempted to create evaluation of unknown type (%i)",
+				(int) evaluation_comm->type);
+		ret = -1;
+		goto end;
+	}
+	ret = evaluation_size;
+end:
+	return ret;
+}
+
+enum lttng_condition_type lttng_evaluation_get_type(
+		const struct lttng_evaluation *evaluation)
+{
+	return evaluation ? evaluation->type : LTTNG_CONDITION_TYPE_UNKNOWN;
+}
+
+void lttng_evaluation_destroy(struct lttng_evaluation *evaluation)
+{
+	if (!evaluation) {
+		return;
+	}
+
+	assert(evaluation->destroy);
+	evaluation->destroy(evaluation);
+}