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By adding a 'write_ready' interface following the lines of the existing 'read_ready', VFS plugins become able to propagate the (de-)saturation of I/O buffers to the VFS user. This information is important when using a non-blocking file descriptor for writing into a TCP socket. Once the application observes EAGAIN, it expects a subsequent 'select' call to return as soon as new I/O buffer space becomes available. Before this patch, the select call would always return under this condition, causing an unnecessarily busy write loop. Issue #4697
This directory is a source-code repository containing Genode-specific services and applications. In contrast to the components that come with the 'os' repository, programs contained in 'gems' are able to leverage the functionalities provided by higher-level repositories such as 'libports'. To use the 'gems' repository, make sure to also add those repositories to your build configuraion.