Hi,
In my project, caesium, I’m binding against libsodium using jnr-ffi. This
involves creating an Interface with a bunch of methods. This all works
swimmingly, most of the time.
I have two functions that differ only in their arguments being type hinted:
(defn secretbox-easy-to-byte-bufs-nocast!
[^ByteBuffer out ^ByteBuffer msg ^ByteBuffer nonce ^ByteBuffer key]
(.crypto_secretbox_easy sodium out msg (.remaining msg) nonce key)
out)
(defn secretbox-easy-refl!
[out msg nonce key]
(.crypto_secretbox_easy sodium out msg (.remaining msg) nonce key)
out)
When calling this function with direct byte buffers (and only with direct byte
buffers!), the call fails. First few lines of traceback:
actual: java.lang.IllegalArgumentException: No matching method found:
crypto_secretbox_easy for class caesium.binding.Sodium$jnr$ffi$0
at clojure.lang.Reflector.invokeMatchingMethod (Reflector.java:80)
clojure.lang.Reflector.invokeInstanceMethod (Reflector.java:28)
caesium.crypto.secretbox$secretbox_easy_refl_BANG_.invokeStatic
(secretbox.clj:85)
The type hinted version works fine.
Is this expected behavior, or a bug? I’m trying to measure how expensive
reflection is, and wasn’t expecting this problem. DirectByteBuffer appears
undocumented, but it is a subclass of MappedByteBuffer, implementing ByteBuffer.
lvh
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