stream_buffer.h BaseType_t xStreamBufferIsEmpty( StreamBufferHandle_t xStreamBuffer );
BaseType_t xStreamBufferIsEmpty( StreamBufferHandle_t xStreamBuffer );
Queries a stream buffer to see if it is empty. A stream buffer is empty if it does not contain any data.
Stream buffer functionality is enabled by including the FreeRTOS/source/stream_buffer.c source file in the build.