X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fconditions%2Fcondition.c;fp=src%2Fcommon%2Fconditions%2Fcondition.c;h=cffe6cf5e2b7408034781f23063681bebe9f2f7c;hp=0000000000000000000000000000000000000000;hb=ae20d1bd206b317393846accdc45082d7c37b571;hpb=fbc9f37df245d544a7705ba576297df791220b44

diff --git a/src/common/conditions/condition.c b/src/common/conditions/condition.c
new file mode 100644
index 000000000..cffe6cf5e
--- /dev/null
+++ b/src/common/conditions/condition.c
@@ -0,0 +1,205 @@
+/*
+ * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#include <lttng/condition/condition-internal.h>
+#include <lttng/condition/buffer-usage-internal.h>
+#include <lttng/condition/session-consumed-size-internal.h>
+#include <lttng/condition/session-rotation-internal.h>
+#include <common/macros.h>
+#include <common/error.h>
+#include <common/dynamic-buffer.h>
+#include <common/buffer-view.h>
+#include <stdbool.h>
+#include <assert.h>
+
+enum lttng_condition_type lttng_condition_get_type(
+		const struct lttng_condition *condition)
+{
+	return condition ? condition->type : LTTNG_CONDITION_TYPE_UNKNOWN;
+}
+
+void lttng_condition_destroy(struct lttng_condition *condition)
+{
+	lttng_condition_put(condition);
+}
+
+static void condition_destroy_ref(struct urcu_ref *ref)
+{
+	struct lttng_condition *condition =
+		container_of(ref, struct lttng_condition, ref);
+
+	condition->destroy(condition);
+}
+
+LTTNG_HIDDEN
+void lttng_condition_get(struct lttng_condition *condition)
+{
+	urcu_ref_get(&condition->ref);
+}
+
+LTTNG_HIDDEN
+void lttng_condition_put(struct lttng_condition *condition)
+{
+	if (!condition) {
+		return;
+	}
+
+	assert(condition->destroy);
+	urcu_ref_put(&condition->ref, condition_destroy_ref);
+}
+
+
+LTTNG_HIDDEN
+bool lttng_condition_validate(const struct lttng_condition *condition)
+{
+	bool valid;
+
+	if (!condition) {
+		valid = false;
+		goto end;
+	}
+
+	if (!condition->validate) {
+		/* Sub-class guarantees that it can never be invalid. */
+		valid = true;
+		goto end;
+	}
+
+	valid = condition->validate(condition);
+end:
+	return valid;
+}
+
+LTTNG_HIDDEN
+int lttng_condition_serialize(const struct lttng_condition *condition,
+		struct lttng_payload *payload)
+{
+	int ret;
+	struct lttng_condition_comm condition_comm = {};
+
+	if (!condition) {
+		ret = -1;
+		goto end;
+	}
+
+	condition_comm.condition_type = (int8_t) condition->type;
+
+	ret = lttng_dynamic_buffer_append(&payload->buffer, &condition_comm,
+			sizeof(condition_comm));
+	if (ret) {
+		goto end;
+	}
+
+	ret = condition->serialize(condition, payload);
+	if (ret) {
+		goto end;
+	}
+end:
+	return ret;
+}
+
+LTTNG_HIDDEN
+bool lttng_condition_is_equal(const struct lttng_condition *a,
+		const struct lttng_condition *b)
+{
+	bool is_equal = false;
+
+	if (!a || !b) {
+		goto end;
+	}
+
+	if (a->type != b->type) {
+		goto end;
+	}
+
+	if (a == b) {
+		is_equal = true;
+		goto end;
+	}
+
+	is_equal = a->equal ? a->equal(a, b) : true;
+end:
+	return is_equal;
+}
+
+LTTNG_HIDDEN
+ssize_t lttng_condition_create_from_payload(
+		struct lttng_payload_view *view,
+		struct lttng_condition **condition)
+{
+	ssize_t ret, condition_size = 0;
+	condition_create_from_payload_cb create_from_payload = NULL;
+	const struct lttng_condition_comm *condition_comm;
+	const struct lttng_payload_view condition_comm_view =
+			lttng_payload_view_from_view(
+					view, 0, sizeof(*condition_comm));
+
+	if (!view || !condition) {
+		ret = -1;
+		goto end;
+	}
+
+	if (!lttng_payload_view_is_valid(&condition_comm_view)) {
+		/* Payload not large enough to contain the header. */
+		ret = -1;
+		goto end;
+	}
+
+	DBG("Deserializing condition from buffer");
+	condition_comm = (typeof(condition_comm)) condition_comm_view.buffer.data;
+	condition_size += sizeof(*condition_comm);
+
+	switch ((enum lttng_condition_type) condition_comm->condition_type) {
+	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
+		create_from_payload = lttng_condition_buffer_usage_low_create_from_payload;
+		break;
+	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
+		create_from_payload = lttng_condition_buffer_usage_high_create_from_payload;
+		break;
+	case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE:
+		create_from_payload = lttng_condition_session_consumed_size_create_from_payload;
+		break;
+	case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING:
+		create_from_payload = lttng_condition_session_rotation_ongoing_create_from_payload;
+		break;
+	case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED:
+		create_from_payload = lttng_condition_session_rotation_completed_create_from_payload;
+		break;
+	default:
+		ERR("Attempted to create condition of unknown type (%i)",
+				(int) condition_comm->condition_type);
+		ret = -1;
+		goto end;
+	}
+
+	if (create_from_payload) {
+		struct lttng_payload_view condition_view =
+				lttng_payload_view_from_view(view,
+					sizeof(*condition_comm), -1);
+
+		ret = create_from_payload(&condition_view, condition);
+		if (ret < 0) {
+			goto end;
+		}
+		condition_size += ret;
+
+	} else {
+		abort();
+	}
+
+	ret = condition_size;
+end:
+	return ret;
+}
+
+LTTNG_HIDDEN
+void lttng_condition_init(struct lttng_condition *condition,
+		enum lttng_condition_type type)
+{
+	condition->type = type;
+	urcu_ref_init(&condition->ref);
+}