On Sat, 13 Mar 2021, Ray Satiro via curl-library wrote:
curl handles can't be used from multiple threads at the same time [1] and because of that I'm pretty sure it's not possible. Note cached connections can be shared between threads (but there is a concurrency bug in that). Daniel will have to elaborate on the intentions here but I'm pretty sure based on the way it's documented [2] that it's not possible.
The same rules still apply: a (handle and) connection can only be used by a single thread at any given time.
The shared connection pool via the share interface would allow different threads to share a single pool (for unused idle onnections), but that requires more work to be properly functional. I don't see that getting fixed in the short term.
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