The tls_recv() function was skipping the select() call when SSL_pending()
returned non-zero, causing a tight busy-wait loop. This fix ensures select()
is always called, using a zero timeout when SSL has buffered data to return
immediately, or the full timeout to properly block when waiting for new data.
This prevents the relay client from consuming 100% CPU while maintaining
the WebSocket connection.
- Complete C library template with OpenSSL-based crypto
- Comprehensive build system (Makefile, build.sh)
- Example code and test suite
- Documentation and usage guides
- Cross-platform compatibility (x64/ARM64)
- Production-ready structure for C library projects
