Comments (3)
Hi there! So, what you're running into is that evmap does not let you share a single ReadHandle
. Instead, you need to keep one clone of the handle for each concurrent place you want to access the map from. In your case above, just add
let read_handler = read_handler.clone()
above the call to thread::spawn
, and make the closure move ||
. That should do it.
from left-right.
After cloning the read_handler
like @jonhoo advised, I think the mutex can be wrapped with a thread-safe reference-counting pointer, i.e. Arc.
let write_lock = Arc::new(Mutex::new(write_handler));
And then inside the OK branch, cloning the reference to the lock with Arc will successfully pass into the closure.
let write_lock = Arc::clone(&write_lock);
After inserting the aforementioned changes, I successfully ran the script.
from left-right.
Yes, the write handle does not support concurrent operations in evmap, so you'd need to wrap it in a Mutex
to share it :)
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Related Issues (20)
- Support for no_std? HOT 5
- i saw the presentation, will it take a lot of CPU like spinlock while write is waiting? HOT 1
- Why you dont use Crossbeam Epoch?? i have question about this please help HOT 1
- Recoverable errors from fallible operation HOT 5
- Memory bloat when using with async runtime HOT 2
- Possible to shallowcopy a HashMap HOT 1
- #[derive(ShallowCopy)] has prohibitive "T: ShallowCopy" bound HOT 4
- Why not make `map_ref` of `ReadGuard` public? HOT 1
- Recreating WriteHandle after its dropped HOT 2
- RFC: Hash and Eq requirement for values HOT 4
- Replace Clone bound with Freeze HOT 4
- Possible UB from Box<T> aliasing HOT 7
- data races due to incorrect `Send + Sync` bounds HOT 3
- Relaxation of epoch invariant HOT 2
- rollback HOT 5
- Switch oplog to VecDeque HOT 1
- A potential alternative to epochs, if it works HOT 1
- can DropBehavior have an associated constant instead of a function HOT 11
- Is there a way to get the backing data structure out? HOT 4
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