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[Merged by Bors] - some cleanup for bevy_ptr #4668

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jakobhellermann
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  1. change PtrMut::as_ptr(self) and OwnedPtr::as_ptr(self) to take &self, otherwise printing the pointer will prevent doing anything else afterwards
  2. make all as_ptr methods safe. There's nothing unsafe about obtaining a pointer, these kinds of methods are safe in std as well str::as_ptr, Rc::as_ptr
  3. rename offset/add to byte_offset/byte_add. The unprefixed methods in std add in increments of std::mem::size_of::<T>, not in bytes. There's a PR for rust to add these byte_ methods Add convenience byte offset/check align functions to pointers rust-lang/rust#95643 and at the call site it makes it much more clear that you need to do .byte_add(i * layout_size) instead of .add(i)

@jakobhellermann jakobhellermann requested a review from james7132 May 5, 2022 14:20
@github-actions github-actions bot added the S-Needs-Triage This issue needs to be labelled label May 5, 2022
@jakobhellermann jakobhellermann requested a review from BoxyUwU May 5, 2022 14:20
@TheRawMeatball TheRawMeatball added C-Feature A new feature, making something new possible and removed S-Needs-Triage This issue needs to be labelled labels May 5, 2022
#[inline]
#[allow(clippy::wrong_self_convention)]
pub unsafe fn as_ptr(self) -> *mut u8 {
pub fn as_ptr(self) -> *mut u8 {
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this isnt taking &self

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it probably doesnt matter but idk if we want to be consistent here or not 😅

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It's not needed here because Ptr: Copy so I kept it as is but it could also be &self for consistency. I don't have a strong opinion here.

@alice-i-cecile alice-i-cecile added C-Code-Quality A section of code that is hard to understand or change and removed C-Feature A new feature, making something new possible labels May 5, 2022
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Ping @cart for an A-Pointer tag.

@alice-i-cecile alice-i-cecile added the S-Ready-For-Final-Review This PR has been approved by the community. It's ready for a maintainer to consider merging it label May 5, 2022
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bors r+

bors bot pushed a commit that referenced this pull request May 6, 2022
1. change `PtrMut::as_ptr(self)` and `OwnedPtr::as_ptr(self)` to take `&self`, otherwise printing the pointer will prevent doing anything else afterwards
2. make all `as_ptr` methods safe. There's nothing unsafe about obtaining a pointer, these kinds of methods are safe in std as well [str::as_ptr](https://doc.rust-lang.org/stable/std/primitive.str.html#method.as_ptr), [Rc::as_ptr](https://doc.rust-lang.org/stable/std/rc/struct.Rc.html#method.as_ptr)
3. rename `offset`/`add` to `byte_offset`/`byte_add`. The unprefixed methods in std add in increments of `std::mem::size_of::<T>`, not in bytes. There's a PR for rust to add these byte_ methods rust-lang/rust#95643 and at the call site it makes it much more clear that you need to do `.byte_add(i * layout_size)` instead of `.add(i)`
@bors bors bot changed the title some cleanup for bevy_ptr [Merged by Bors] - some cleanup for bevy_ptr May 6, 2022
@bors bors bot closed this May 6, 2022
@jakobhellermann jakobhellermann deleted the bevy-ptr-cleanup branch May 7, 2022 07:52
robtfm pushed a commit to robtfm/bevy that referenced this pull request May 10, 2022
1. change `PtrMut::as_ptr(self)` and `OwnedPtr::as_ptr(self)` to take `&self`, otherwise printing the pointer will prevent doing anything else afterwards
2. make all `as_ptr` methods safe. There's nothing unsafe about obtaining a pointer, these kinds of methods are safe in std as well [str::as_ptr](https://doc.rust-lang.org/stable/std/primitive.str.html#method.as_ptr), [Rc::as_ptr](https://doc.rust-lang.org/stable/std/rc/struct.Rc.html#method.as_ptr)
3. rename `offset`/`add` to `byte_offset`/`byte_add`. The unprefixed methods in std add in increments of `std::mem::size_of::<T>`, not in bytes. There's a PR for rust to add these byte_ methods rust-lang/rust#95643 and at the call site it makes it much more clear that you need to do `.byte_add(i * layout_size)` instead of `.add(i)`
exjam pushed a commit to exjam/bevy that referenced this pull request May 22, 2022
1. change `PtrMut::as_ptr(self)` and `OwnedPtr::as_ptr(self)` to take `&self`, otherwise printing the pointer will prevent doing anything else afterwards
2. make all `as_ptr` methods safe. There's nothing unsafe about obtaining a pointer, these kinds of methods are safe in std as well [str::as_ptr](https://doc.rust-lang.org/stable/std/primitive.str.html#method.as_ptr), [Rc::as_ptr](https://doc.rust-lang.org/stable/std/rc/struct.Rc.html#method.as_ptr)
3. rename `offset`/`add` to `byte_offset`/`byte_add`. The unprefixed methods in std add in increments of `std::mem::size_of::<T>`, not in bytes. There's a PR for rust to add these byte_ methods rust-lang/rust#95643 and at the call site it makes it much more clear that you need to do `.byte_add(i * layout_size)` instead of `.add(i)`
ItsDoot pushed a commit to ItsDoot/bevy that referenced this pull request Feb 1, 2023
1. change `PtrMut::as_ptr(self)` and `OwnedPtr::as_ptr(self)` to take `&self`, otherwise printing the pointer will prevent doing anything else afterwards
2. make all `as_ptr` methods safe. There's nothing unsafe about obtaining a pointer, these kinds of methods are safe in std as well [str::as_ptr](https://doc.rust-lang.org/stable/std/primitive.str.html#method.as_ptr), [Rc::as_ptr](https://doc.rust-lang.org/stable/std/rc/struct.Rc.html#method.as_ptr)
3. rename `offset`/`add` to `byte_offset`/`byte_add`. The unprefixed methods in std add in increments of `std::mem::size_of::<T>`, not in bytes. There's a PR for rust to add these byte_ methods rust-lang/rust#95643 and at the call site it makes it much more clear that you need to do `.byte_add(i * layout_size)` instead of `.add(i)`
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