wasi-threads

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Is `wasi_thread_exit` needed?

21

In a discussion yesterday with @sbc100 and @sunfishcode, we considered whether it might be necessary to add a second API call to the `wasi-threads` proposal to support early exit from...

abrown

Quesitons about `wasi_thread_spawn` semantics

5

the description of `wasi_thread_spawn` says: ``` instantiate the module again — this child instance will be used for the new thread ``` it isn't obvious to me which module "the...

yamt

change module name to wasi_snapshot_preview1

2

I came across below from [rust-lang making a triple wasm32-wasi-preview1-threads](https://github.com/rust-lang/rust/pull/112922#issuecomment-1632394649) > That's not right, [wasi-threads](https://github.com/WebAssembly/wasi-threads) is an extension to the Wasi Preview 1 specification which adds support for threads. That...

codefromthecrypt

test: unable to use `build.sh`

10

When I run `build.sh`, I see the following errors: ``` $ ./build.sh Compiling testsuite/thread_spawn-simple.c testsuite/thread_spawn-simple.c:3:10: fatal error: 'wasi/api.h' file not found #include ^~~~~~~~~~~~ 1 error generated. testsuite/wasi_thread_spawn.S:5:2: error: unknown directive...

abrown

Thread-Local Variable Destructors

5

I was wondering what the plans are for thread-local variable destructors in Wasi, is this in scope at all? Typically something like `__cxa_thread_atexit` would be necessary.

daxpedda

Remove thread IDs

3

Thread IDs are a design mistake and many OSes are moving away from them (e.g. pidfd on Linux, HANDLE on Windows). The main issue is that the lifetime of a...

Amanieu

memory import name

1

currently it's just said: ``` When instantiating a module which is expected to run with `wasi-threads`, the WASI host must first allocate shared memories to satisfy the module's imports. ```...

yamt

Query the maximum available parallelism

4

For some algorithms, in order to partition work on several threads, we need to know how many threads are available. WebAssembly hosts may decide to limit the amount of parallelism...

abrown

Use WIT's result<> type for `thread-spawn`'s return values

3

Because `thread-spawn` can fail, we use return value to communicate error code. We also use return value to communicate success and pass thread id to the user. This usecase nicely...

loganek

See https://github.com/WebAssembly/wasi-threads/pull/26 and https://github.com/WebAssembly/wasi-threads/issues/29

loganek