Add a PackMessage method which doesn't malloc
This lets us pack directly into the buffer to write to disk, removing
mallocs and allowing us to fix heap fragmentation by reducing memory
churn.
Change-Id: I116f379b6f59f7d0f0dbfa69f15aab33c9e6a6cd
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/aos/events/logging/logfile_utils.h b/aos/events/logging/logfile_utils.h
index ca733d4..951efdc 100644
--- a/aos/events/logging/logfile_utils.h
+++ b/aos/events/logging/logfile_utils.h
@@ -199,6 +199,17 @@
flatbuffers::FlatBufferBuilder *fbb, const Context &context,
int channel_index, LogType log_type);
+// Returns the size that the packed message from PackMessage or
+// PackMessageInline will be.
+flatbuffers::uoffset_t PackMessageSize(LogType log_type,
+ const Context &context);
+
+// Packs the provided message pointed to by context into the provided buffer.
+// This is equivalent to PackMessage, but doesn't require allocating a
+// FlatBufferBuilder underneath.
+size_t PackMessageInline(uint8_t *data, const Context &contex,
+ int channel_index, LogType log_type);
+
// Class to read chunks out of a log file.
class SpanReader {
public: