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new memory model. not quite complete

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This commit is contained in:
Pat Hickey
2020-01-27 18:20:47 -08:00
parent e6a4ae205c
commit ec456e9e50
8 changed files with 287 additions and 179 deletions
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37
src/lib.rs
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@@ -18,43 +18,40 @@ pub mod test {
a_lamer_excuse_by_reference: ::memory::GuestPtr<types::Excuse>,
two_layers_of_excuses: ::memory::GuestPtrMut<::memory::GuestPtr<types::Excuse>>,
) -> Result<(), types::Errno> {
use memory::GuestTypeCopy;
// Read enum value from mutable:
let a_better_excuse =
types::Excuse::read_val(&a_better_excuse_by_reference).map_err(|e| {
let mut a_better_excuse_ref: ::memory::GuestRefMut<types::Excuse> =
a_better_excuse_by_reference.as_ref_mut().map_err(|e| {
eprintln!("a_better_excuse_by_reference error: {}", e);
types::Errno::InvalidArg
})?;
let a_better_excuse: types::Excuse = *a_better_excuse_ref;
// Read enum value from immutable ptr:
let a_lamer_excuse =
types::Excuse::read_val(&a_lamer_excuse_by_reference).map_err(|e| {
eprintln!("a_lamer_excuse_by_reference error: {}", e);
types::Errno::InvalidArg
})?;
let a_lamer_excuse = *a_lamer_excuse_by_reference.as_ref().map_err(|e| {
eprintln!("a_lamer_excuse_by_reference error: {}", e);
types::Errno::InvalidArg
})?;
// Write enum to mutable ptr:
types::Excuse::write_val(a_lamer_excuse, &a_better_excuse_by_reference);
*a_better_excuse_ref = a_lamer_excuse;
// Read ptr value from mutable ptr:
let one_layer_down =
::memory::GuestPtr::read_ptr(&two_layers_of_excuses).map_err(|e| {
let mut one_layer_down: ::memory::GuestRefMut<::memory::GuestPtr<types::Excuse>> =
two_layers_of_excuses.as_ref_mut().map_err(|e| {
eprintln!("one_layer_down error: {}", e);
types::Errno::InvalidArg
})?;
// Read enum value from that ptr:
let two_layers_down = types::Excuse::read_val(&one_layer_down).map_err(|e| {
eprintln!("two_layers_down error: {}", e);
types::Errno::InvalidArg
})?;
let two_layers_down: ::memory::GuestRef<types::Excuse> =
one_layer_down.from_guest().map_err(|e| {
eprintln!("two_layers_down error: {}", e);
types::Errno::InvalidArg
})?;
// Write ptr value to mutable ptr:
::memory::GuestPtr::write_ptr(
&a_better_excuse_by_reference.as_immut(),
&two_layers_of_excuses,
);
// FIXME this is still impossible...
// two_layers_of_excuses.write_guest(&a_better_excuse_by_reference)
println!(
"BAZ: excuse: {:?}, better excuse: {:?}, lamer excuse: {:?}, two layers down: {:?}",