ruby.git/ext/fiddle/pointer.c, branch v3_4_9

Do not depend on the evaluation order of C arguments

2024-12-03T20:43:08+00:00

The evaluation order of C arguments is unspecified.
`RSTRING_LEN(str)` would fails if the conversion to a String by
`StringValuePtr` is not done yet.

Coverity Scan found this issue.

[ruby/fiddle] Ractor support

2024-10-16T02:24:25+00:00

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

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

Co-authored-by: Sutou Kouhei

[ruby/fiddle] Cast via `VALUE` function pointer between object

2024-10-10T14:52:07+00:00

pointer
(https://github.com/ruby/fiddle/pull/150)

With gcc 13 and -pedantic:

```
../../../src/ext/fiddle/function.c: In function ‘function_call’:
../../../src/ext/fiddle/function.c:374:15: error: ISO C forbids conversion of object pointer to function pointer type [-Wpedantic]
  374 |     args.fn = (void(*)(void))NUM2PTR(cfunc);
      |               ^
../../../src/ext/fiddle/pointer.c: In function ‘rb_fiddle_ptr_inspect’:
../../../src/ext/fiddle/pointer.c:573:84: error: ISO C forbids conversion of function pointer to object pointer type [-Wpedantic]
  573 |                       RB_OBJ_CLASSNAME(self), (void *)data, data->ptr, data->size, (void *)data->free);
      |                                                                                    ^
```

https://github.com/ruby/fiddle/commit/6421e317a1

[ruby/fiddle] Implement write barriers for Fiddle::Pointer

2023-06-28T07:36:52+00:00

(https://github.com/ruby/fiddle/pull/127)

Save from having to mark them on every minor.

https://github.com/ruby/fiddle/commit/153c09c99f

Co-authored-by: Jean Boussier

[ruby/fiddle] Add a helper method for reading/writing memory

2023-06-28T07:36:49+00:00

(https://github.com/ruby/fiddle/pull/123)

This commit adds two new methods, `Fiddle::Pointer.read` and
`Fiddle::Pointer.write`. Both methods take an address, and will read or
write bytes at that address respectively.

For example we can read from an address without making a Pointer object:

```ruby
Fiddle::Pointer.read(address, 5) # read 5 bytes
```

We can also write to an address without allocating a Pointer object:

```ruby
Fiddle::Pointer.write(address, "bytes") # write 5 bytes
```

This allows us to read / write memory at arbitrary addresses without
instantiating a new `Fiddle::Pointer` object.

Examples where this API would be useful
[1](https://github.com/tenderlove/tenderjit/blob/f03481d28bff4d248746e596929b0841de65f181/lib/tenderjit/fiddle_hacks.rb#L26-L28)
[2](https://github.com/tenderlove/ruby/blob/77c8daa2d40dd58eeb3785ce17dea2ee38f308d1/lib/ruby_vm/rjit/c_pointer.rb#L193)
[3](https://github.com/tenderlove/ruby/blob/77c8daa2d40dd58eeb3785ce17dea2ee38f308d1/lib/ruby_vm/rjit/c_pointer.rb#L284)

I also added a writer method for the same reasons as the reader.

---------

https://github.com/ruby/fiddle/commit/04238cefed

Co-authored-by: Sutou Kouhei

[ruby/fiddle] Check HAVE_RUBY_MEMORY_VIEW_H rather than API version (https://github.com/ruby/fiddle/pull/86)

2021-07-14T09:55:59+00:00

https://github.com/ruby/fiddle/commit/c5abcc3a7e

[ruby/fiddle] Return the module handle value in Fiddle::Handle#to_i and add FIddle::Handle#to_ptr (https://github.com/ruby/fiddle/pull/87)

2021-07-14T09:43:32+00:00

https://github.com/ruby/fiddle/commit/170111a0cb

[ruby/fiddle] Use have_header and have_type to detect memory view availability

2021-07-13T10:37:46+00:00

Fix https://github.com/ruby/fiddle/pull/84

It may detect ruby/memory_view.h for system Ruby that is installed in
/usr.

We can use RUBY_API_VERSION_MAJOR to detect memory view availability
because memory view is available since Ruby 3.0.

Reported by Jun Aruga. Thanks!!!

https://github.com/ruby/fiddle/commit/3292929830

[ruby/fiddle] StringValuePtr may change the val

2021-07-13T10:37:45+00:00

https://github.com/ruby/fiddle/commit/bddca7c895

[memory_view][fiddle] Use bool for boolean return value

2020-12-23T00:05:07+00:00