support non-blocking wasip2 sockets in read and write#734
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alexcrichton merged 2 commits intoWebAssembly:mainfrom Feb 12, 2026
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For descriptors which have `sendto` and `recvfrom` in their vtables, use those for writing and reading respectively since they know how to handle non-blocking descriptors. In the future, we could generalize this to support non-blocking descriptors which aren't sockets, also.
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This commit extends the support in WebAssembly#734 by deduplicating the separate paths for reading a stream shared between `read` and `recvfrom`, for example. The `get_{read,write}_stream` methods now return more metadata and the TCP `recvfrom` implementation delegates to an internal `__wasilibc_read` to perform the actual read. This opens up the door to supporting nonblocking reads/writes on other streams in the future, for example.
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For descriptors which have
sendtoandrecvfromin their vtables, use those for writing and reading respectively since they know how to handle non-blocking descriptors.In the future, we could generalize this to support non-blocking descriptors which aren't sockets, also.