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@ -13,6 +13,10 @@ type Decompressor<T> = BzDecoder<T>;
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const DEFER_DROP_SIZE_FLOOR: usize = 1024 * 1024; // 1 MB
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/// Serialise this object asynchronously
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///
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/// # Note
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/// This compresses the output stream.
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/// It cannot be used by `prealloc` read/write functions, as they do not compress.
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pub async fn write_async<T: Serialize, W>(mut to: W, item: &T) -> eyre::Result<()>
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where W: AsyncWrite + Unpin
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{
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@ -57,3 +61,29 @@ where W: AsyncWrite + Unpin
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}
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flush_fut.await
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}
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#[cfg(feature="prealloc")]
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mod prealloc {
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use super::*;
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use std::os::unix::prelude::*;
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/// Write this object as-is to this file descriptor.
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///
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/// # Note
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/// This does not compress like `write_aynsc()` does. It is just a 1-1 dump of the serialisation.
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/// Therefore, `write_prealloc` cannot be used with `read_async()`, and other such things.
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///
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/// `fd` must be a valid *File* descriptor. fallocating and mapping stdout probably won't work
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///
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/// This is a completely synchronous operation. You should use it with `spawn_blocking` et al. to prevent task hangups.
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pub fn write_prealloc<T: Serialize>(fd: impl AsRawFd, item: &T) -> eyre::Result<()>
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{
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//TODO: serialise `item` to vec.
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//TODO: fallocate() `fd` to size of `vec`
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//TODO: memmap() `fd`
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//TODO: memcpy() vec to map
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//TODO: flush map
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//TODO: `drop!(vec)`
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todo!()
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}
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}
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#[cfg(feature="prealloc")] pub use prealloc::write_prealloc as write_sync_map;
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