From: Nils Carlson <nils.carlson@ericsson.com>
Date: Thu, 4 Nov 2010 16:44:12 +0000 (+0100)
Subject: Add ustcomm_trace_info struct and support functions to ustcomm
X-Git-Tag: v0.9~11
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=10f2b72421cdb8844440ddc49a836fb73ce1b495;p=ust.git

Add ustcomm_trace_info struct and support functions to ustcomm

Signed-off-by: Nils Carlson <nils.carlson@ericsson.com>
Acked-by: David Goulet <david.goulet@polymtl.ca>
---

diff --git a/libustcomm/ustcomm.c b/libustcomm/ustcomm.c
index fe8fea2..7d0fe00 100644
--- a/libustcomm/ustcomm.c
+++ b/libustcomm/ustcomm.c
@@ -621,6 +621,38 @@ char * ustcomm_restore_ptr(char *ptr, char *data_field, int data_field_size)
 	return data_field + (long)ptr;
 }
 
+int ustcomm_pack_trace_info(struct ustcomm_header *header,
+			    struct ustcomm_trace_info *trace_inf,
+			    const char *trace)
+{
+	int offset = 0;
+
+	trace_inf->trace = ustcomm_print_data(trace_inf->data,
+					      sizeof(trace_inf->data),
+					      &offset,
+					      trace);
+
+	if (trace_inf->trace == USTCOMM_POISON_PTR) {
+		return -ENOMEM;
+	}
+
+	header->size = COMPUTE_MSG_SIZE(trace_inf, offset);
+
+	return 0;
+}
+
+
+int ustcomm_unpack_trace_info(struct ustcomm_trace_info *trace_inf)
+{
+	trace_inf->trace = ustcomm_restore_ptr(trace_inf->trace,
+					       trace_inf->data,
+					       sizeof(trace_inf->data));
+	if (!trace_inf->trace) {
+		return -EINVAL;
+	}
+
+	return 0;
+}
 
 int ustcomm_pack_channel_info(struct ustcomm_header *header,
 			      struct ustcomm_channel_info *ch_inf,
diff --git a/libustcomm/ustcomm.h b/libustcomm/ustcomm.h
index 4c2e7cd..ed8470f 100644
--- a/libustcomm/ustcomm.h
+++ b/libustcomm/ustcomm.h
@@ -78,6 +78,11 @@ enum tracectl_commands {
 	STOP_TRACE,
 };
 
+struct ustcomm_trace_info {
+	char *trace;
+	char data[USTCOMM_DATA_SIZE];
+};
+
 struct ustcomm_channel_info {
 	char *channel;
 	unsigned int subbuf_size;
@@ -172,6 +177,12 @@ extern char * ustcomm_restore_ptr(char *ptr, char *data_field,
 	(size_t) (long)(struct_ptr)->data - (long)(struct_ptr) + (offset)
 
 /* Packing and unpacking functions, making life easier */
+extern int ustcomm_pack_trace_info(struct ustcomm_header *header,
+				   struct ustcomm_trace_info *trace_inf,
+				   const char *trace);
+
+extern int ustcomm_unpack_trace_info(struct ustcomm_trace_info *trace_inf);
+
 extern int ustcomm_pack_channel_info(struct ustcomm_header *header,
 				     struct ustcomm_channel_info *ch_inf,
 				     const char *channel);