(https://github.com/ruby/fiddle/pull/162)

This allows for passing integers as pointer arguments to functions when
using the FFI backend. This is a workaround until we can get JRuby's FFI
implementation to allow for it directly (see also
https://github.com/jruby/jruby/pull/8423)

---------

https://github.com/ruby/fiddle/commit/e2f0952e9b

Co-authored-by: Benoit Daloze <eregontp@gmail.com>

GitHub: fix https://github.com/ruby/fiddle/pull/159

It's used by FFI test. So Symbol may be used by other use cases.

https://github.com/ruby/fiddle/pull/139 introduced the "Function name is String" limitation. This
commit removed the limitation.

Reported by Mamoru TASAKA. Thanks!!!

https://github.com/ruby/fiddle/commit/cea30fe5f9

Fix GH-145

Rename `lib/fiddle/jruby.rb` to `lib/fiddle/ffi_backend.rb` as a generic
ffi gem API based implementation.
JRuby and TruffleRuby use `lib/fiddle/ffi_backend.rb`.

---------

Co-authored-by: Benoit Daloze <eregontp@gmail.com>

(https://github.com/ruby/fiddle/pull/139)

https://github.com/ruby/fiddle/commit/91d0ea9849

Co-authored-by: Sutou Kouhei <kou@clear-code.com>

https://github.com/ruby/fiddle/commit/5bc55e0533

Fix GH-104

lib/fiddle/jruby.rb is based on

https://github.com/jruby/jruby/blob/master/lib/ruby/stdlib/fiddle/jruby.rb
.

Here are changes for it:

* Move `Fiddle::TYPE_*` to `Fiddle::Types::*`
* Add `Fiddle::Types::VARIADIC`
* Add `Fiddle::Types::CONST_STRING`
* Add `Fiddle::Types::BOOL`
* Add `Fiddle::Types::INT8_T`
* Add `Fiddle::Types::UINT8_T`
* Add `Fiddle::Types::INT16_T`
* Add `Fiddle::Types::UINT16_T`
* Add `Fiddle::Types::INT32_T`
* Add `Fiddle::Types::UINT32_T`
* Add `Fiddle::Types::INT64_T`
* Add `Fiddle::Types::UINT64_T`
* Add more `Fiddle::ALIGN_*` for the above new `Fiddle::Types::*`
* Add more `Fiddle::SIZEOF_*` for the above new `Fiddle::Types::*`
* Add support for specifying type as not only `Fiddle::Types::*` but
also `Symbol` like `:int`
* Add support for variable size arguments in `Fiddle::Function`
* Add `Fiddle::Closure#free`
* Add `Fiddle::Closure#freed?`
* Add `Fiddle::Error` as base the error class
* Add `Fiddle::Pointer#call_free` and stop using `FFI::AutoPointer` in
`Fiddle::Pointer`
* Add support for `Fiddle::Pointer.malloc {}` `Fiddle::Pointer`
* Add support for `Fiddle::Pointer#free=`
* Add `Fiddle::Pointer#freed?`
* Use binary string not C string for `Fiddle::Pointer#[]`
* Add `Fiddle::Handle.sym_defined?`
* Add `Fiddle::Handle#sym_defined?`
* Add `Fiddle::Handle::DEFAULT`
* Add `Fiddle::ClearedReferenceError`
* Add no-op `Fiddle::Pinned`

Some features are still "not implemented". So there are some "omit"s for
JRuby in tests.

`test/fiddle/test_function.rb`
(https://github.com/ruby/fiddle/pull/141)

https://github.com/ruby/ruby/pull/11048#issuecomment-2185630854

---------

https://github.com/ruby/fiddle/commit/a245f19763

Co-authored-by: Yusuke Endoh <mame@ruby-lang.org>

GitHub: GH-102

This also improves freed closures assertions.

https://github.com/ruby/fiddle/commit/0495624caf

GitHub: fix GH-102

We can't use Fiddle::Closure before we fork the process. If we do it,
the process may be crashed with SELinux.

See https://github.com/ruby/fiddle/issues/102#issuecomment-1241763091
for details.

Reported by Vít Ondruch. Thanks!!!

https://github.com/ruby/fiddle/commit/1343ac7a95