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use std::ffi::CString;
use std::sync::Arc;
use rustc_data_structures::memmap::Mmap;
use crate::traits::*;
pub struct ThinModule<B: WriteBackendMethods> {
pub shared: Arc<ThinShared<B>>,
pub idx: usize,
}
impl<B: WriteBackendMethods> ThinModule<B> {
pub fn name(&self) -> &str {
self.shared.module_names[self.idx].to_str().unwrap()
}
pub fn cost(&self) -> u64 {
// Yes, that's correct, we're using the size of the bytecode as an
// indicator for how costly this codegen unit is.
self.data().len() as u64
}
pub fn data(&self) -> &[u8] {
let a = self.shared.thin_buffers.get(self.idx).map(|b| b.data());
a.unwrap_or_else(|| {
let len = self.shared.thin_buffers.len();
self.shared.serialized_modules[self.idx - len].data()
})
}
}
pub struct ThinShared<B: WriteBackendMethods> {
pub data: B::ThinData,
pub thin_buffers: Vec<B::ThinBuffer>,
pub serialized_modules: Vec<SerializedModule<B::ModuleBuffer>>,
pub module_names: Vec<CString>,
}
pub enum SerializedModule<M: ModuleBufferMethods> {
Local(M),
FromRlib(Vec<u8>),
FromUncompressedFile(Mmap),
}
impl<M: ModuleBufferMethods> SerializedModule<M> {
pub fn data(&self) -> &[u8] {
match *self {
SerializedModule::Local(ref m) => m.data(),
SerializedModule::FromRlib(ref m) => m,
SerializedModule::FromUncompressedFile(ref m) => m,
}
}
}
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