ruby.git/ext/fiddle/fiddle.c, branch v3_0_4

Import fiddle-1.0.4 (#3860)

2020-12-11T00:41:12+00:00

I don't use tool/sync_default_gem.rb because the last sync was incomplete.

Co-authored-by: Hiroshi SHIBATA 
Co-authored-by: Alan Wu 
Co-authored-by: sinisterchipmunk 
Co-authored-by: Sutou Kouhei

[ruby/fiddle] Use ruby_xcalloc() instead of ruby_xmalloc() and memset()

2020-11-18T00:05:13+00:00

https://github.com/ruby/fiddle/commit/6d24fb5438

[ruby/fiddle] Add workaround for RubyInstaller for Windows

2020-11-18T00:05:13+00:00

See comment for details.

https://github.com/ruby/fiddle/commit/0c76f03dc4

[ruby/fiddle] Add a "pinning" reference (#44)

2020-11-18T00:05:13+00:00

* Add a "pinning" reference

A `Fiddle::Pinned` objects will prevent the objects they point to from
moving.  This is useful in the case where you need to pass a reference
to a C extension that keeps the address in a global and needs the
address to be stable.

For example:

```ruby
class Foo
  A = "hi" # this is an embedded string

  some_c_function A # A might move!
end
```

If `A` moves, then the underlying string buffer may also move.
`Fiddle::Pinned` will prevent the object from moving:

```ruby
class Foo
  A = "hi" # this is an embedded string

  A_pinner = Fiddle::Pinned.new(A) # :nodoc:

  some_c_function A # A can't move because of `Fiddle::Pinned`
end
```

This is a similar strategy to what Graal uses:

  https://www.graalvm.org/sdk/javadoc/org/graalvm/nativeimage/PinnedObject.html#getObject--

* rename global to match exception name

* Introduce generic Fiddle::Error and rearrange error classes

Fiddle::Error is the generic exception base class for Fiddle exceptions.
This commit introduces the class and rearranges Fiddle exceptions to
inherit from it.

https://github.com/ruby/fiddle/commit/ac52d00223

[ruby/fiddle] Add support for specifying types by name as String or Symbol

2020-11-18T00:05:13+00:00

For example, :voidp equals to Fiddle::TYPE_VOID_P.

https://github.com/ruby/fiddle/commit/3b4de54899

[ruby/fiddle] Add TYPE_CONST_STRING and SIZEOF_CONST_STRING for "const char *"

2020-11-18T00:05:13+00:00

Add rb_fiddle_ prefix to conversion functions.h to keep backward
compatibility but value_to_generic() isn't safe for TYPE_CONST_STRING
and not String src. Use rb_fiddle_value_to_generic() instead.

https://github.com/ruby/fiddle/commit/0ffcaa39e5

[ruby/fiddle] support for very old libffi

2020-06-28T01:40:31+00:00

Define `Fiddle::TYPE_VARIADIC` only when `ffi_prep_cif_var` is
available, otherwise skip the test for it.

[ruby/fiddle] Add support for variadic arguments

2020-06-27T14:54:08+00:00

GitHub: fix GH-39

Reported by kojix2. Thanks!!!

https://github.com/ruby/fiddle/commit/6c4cb904dc

[ruby/fiddle] Initialize memory to 0 when calling Fiddle.malloc(). (#24)

2020-05-23T05:29:16+00:00

https://github.com/ruby/fiddle/commit/8414239ca3

use NUM2SIZET instead of NUM2INT

2014-02-25T14:18:13+00:00

* ext/dl/dl.c (rb_dl_realloc): use NUM2SIZET instead of NUM2INT.

* ext/fiddle/fiddle.c (rb_fiddle_realloc): ditto.

* ext/dl/dl.c (rb_dl_malloc): use NUM2SIZET instead of NUM2INT.
  Coverity Scan found this bug.

* ext/fiddle/fiddle.c (rb_fiddle_malloc): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45174 b2dd03c8-39d4-4d8f-98ff-823fe69b080e