no the issue is that while it's true that complex library accessing native stuff in c are hard to port, you don't need the whole stuff ported under jni, and her

no the issue is that while it's true that complex library accessing native stuff in c are hard to port, you don't need the whole stuff ported under jni, and here is the missing link, the functionality provided by unsafe is limited enough (think of it as a building block for higher level stuff) that it could be reasonably done in c, using posix stuff and some patching in for window which while non posix enough is at least stable trough versions. so it basically become write twice run on many things, which is good enough. the problem is that it's not 'rewrite all the libraries in jni' but only 'rewrite the two calls you need in jni' - scoping is relevant, as we are not arguing about jni in a vacuum.