73     mWriteSegmentHead               = mBuffer;  in Clear()
256     EXPECT(mWriteSegmentHead == mWriteSegmentTail, NO_ACTION);  in InFrameBeginSegment()
259     if (mWriteFrameStart[mWriteDirection] == mWriteSegmentHead)  in InFrameBeginSegment()
271     WriteUint16At(mWriteSegmentHead, headerFlags, mWriteDirection);  in InFrameBeginSegment()
283     segmentLength = GetDistance(mWriteSegmentHead, mWriteSegmentTail, mWriteDirection);  in InFrameEndSegment()
291         header = ReadUint16At(mWriteSegmentHead, mWriteDirection);  in InFrameEndSegment()
294         WriteUint16At(mWriteSegmentHead, header, mWriteDirection);  in InFrameEndSegment()
297         mWriteSegmentHead = mWriteSegmentTail;  in InFrameEndSegment()
302         mWriteSegmentTail = mWriteSegmentHead;  in InFrameEndSegment()
316     mWriteSegmentHead = mWriteSegmentTail = mWriteFrameStart[mWriteDirection];  in InFrameDiscard()
358     mWriteSegmentHead = mWriteSegmentTail = mWriteFrameStart[mWriteDirection];  in InFrameBegin()
427     aPosition.mSegmentHead = mWriteSegmentHead;  in InFrameGetPosition()
442     EXPECT(aPosition.mSegmentHead == mWriteSegmentHead, error = OT_ERROR_INVALID_ARGS);  in InFrameOverwrite()
445     segmentLength = GetDistance(mWriteSegmentHead, mWriteSegmentTail, mWriteDirection);  in InFrameOverwrite()
446     distance      = GetDistance(mWriteSegmentHead, aPosition.mPosition, mWriteDirection);  in InFrameOverwrite()
471     EXPECT(aPosition.mSegmentHead == mWriteSegmentHead, NO_ACTION);  in InFrameGetDistance()
473     segmentLength = GetDistance(mWriteSegmentHead, mWriteSegmentTail, mWriteDirection);  in InFrameGetDistance()
474     offset        = GetDistance(mWriteSegmentHead, aPosition.mPosition, mWriteDirection);  in InFrameGetDistance()
490     EXPECT(aPosition.mSegmentHead == mWriteSegmentHead, error = OT_ERROR_INVALID_ARGS);  in InFrameReset()
492     segmentLength = GetDistance(mWriteSegmentHead, mWriteSegmentTail, mWriteDirection);  in InFrameReset()
493     offset        = GetDistance(mWriteSegmentHead, aPosition.mPosition, mWriteDirection);  in InFrameReset()
518     mWriteFrameStart[mWriteDirection] = mWriteSegmentHead;  in InFrameEnd()