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WHAT'S NEW
FreeRTOS website now available in Simplified Chinese
Search and browse content in your preferred language. See the blog post.
New FreeRTOS Long Term Support version now available.
Receive security patches and critical bug fixes on FreeRTOS libraries for two years. See the blog post.
FreeRTOS Extended Maintenance Program (EMP) registration now open.
Providing security patches and critical bug fixes on FreeRTOS Long Term Support (LTS) versions for up to 10 additional years. See the blog post.
FreeRTOS-Plus-TCP v3.0.0 released:
We've added comprehensive unit tests and penetration and protocol testing. See the blog post.
Featured FreeRTOS IoT Integrations:
Introducing three featured integrations for more secure IoT applications. See the blog post.

xStreamBufferSpacesAvailable()
[RTOS Stream Buffer API]


stream_buffer.h 

size_t xStreamBufferSpacesAvailable( StreamBufferHandle_t xStreamBuffer );

Queries a stream buffer to see how much free space it contains, which is equal to the amount of data that can be sent to the stream buffer before it is full.

Stream buffer functionality is enabled by including the FreeRTOS/source/stream_buffer.c source file in the build.

Parameters:
xStreamBuffer   The handle of the stream buffer being queried.
Returns:
The number of bytes that can be written to the stream buffer before the stream buffer would be full.






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