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Also rework its API's to return Optional<size_t> instead of int with -1
as the error value.
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This implementation uses the new helper method of Bitmap called
find_longest_range_of_unset_bits. This method looks for the biggest
range of contiguous bits unset in the bitmap and returns the start of
the range back to the caller.
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As suggested by Joshua, this commit adds the 2-clause BSD license as a
comment block to the top of every source file.
For the first pass, I've just added myself for simplicity. I encourage
everyone to add themselves as copyright holders of any file they've
added or modified in some significant way. If I've added myself in
error somewhere, feel free to replace it with the appropriate copyright
holder instead.
Going forward, all new source files should include a license header.
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I don't love this, but I also don't love the Bitmap class in general.
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We were falling back to an incorrect compiler-generated copy ctor for
this class, and let's not do that.
Found by PVS-Studio.
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These types can be picked up by including <AK/Types.h>:
* u8, u16, u32, u64 (unsigned)
* i8, i16, i32, i64 (signed)
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Also run it across the whole tree to get everything using the One True Style.
We don't yet run this in an automated fashion as it's a little slow, but
there is a snippet to do so in makeall.sh.
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I'm still feeling this out, but I am starting to like the general idea.
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sys$fork() now clones all writable regions with per-page COW bits.
The pages are then mapped read-only and we handle a PF by COWing the pages.
This is quite delightful. Obviously there's lots of work to do still,
and it needs better data structures, but the general concept works.
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