> On Dec 11, 2015, at 7:13 AM, Douglas Gregor via swift-dev > <swift-dev@swift.org> wrote: > > >> On Dec 11, 2015, at 4:33 AM, Geordie Jay via swift-dev <swift-dev@swift.org> >> wrote: >> >> Hi, maybe one of the Apple devs can help out with this quick Q: >> >> To interface with the JNI, we’d presumably need to call swift functions from >> our compiled swift binaries from C (or directly from Java, the result being >> the same). Is there a way to demangle certain symbols in the output binary >> to this effect, or is there another / a better way to access Swift functions >> from C? > > Others can probably give a more detailed response, but... > > There’s a Swift demangler in Swift’s “Basic” library > (lib/Basic/Demangle.cpp), along with a standalone tool (swift-demangle) you > can experiment with. The information in the mangled name should be complete > enough to call, but you’ll need to match Swift’s calling convention. > > If it’s just a specific set of Swift functions you want to call from C, you > can use the @_silgen_name attribute to override the mangled name, and/or make > them @convention(c) to use the C calling convention.
@_silgen_name isn't the right answer here, since the convention will be wrong, and it won't interact properly with Clang imports and exports. Like Slava said, you want something like the '@_cdecl' attribute he proposed and I half-implemented. -Joe _______________________________________________ swift-dev mailing list swift-dev@swift.org https://lists.swift.org/mailman/listinfo/swift-dev
