Changes in multi.c

adff9d9d - Fix externref/anyref ownership in C/C++ API (#11799)

Tue, 07 Oct 2025 16:36:13 +0000

Fix externref/anyref ownership in C/C++ API (#11799)* Fix externref/anyref ownership in C/C++ APIThis commit is a follow-up to #11514 which was discovered throughfailing tests in the wasmtime-py repository when updating to Wasmtime37.0.0. Effectively a combination of bugs in the Rust API meant that itwasn't possible to use `externref` or `anyref` bindings correctly. TheRust changes in this commit are:* `wasmtime_val_unroot` correctly drops the value now as opposed to effectively being a noop from before (typo of using `as_externref` vs `from_externref`).* `wasmtime_{anyref,externref,val}_t` now have a `Drop` implementation in Rust to correctly drop them if a value in Rust is dropped. This is required to correctly manage memory in the `wasmtime_func_{call,new}` implementations, for example.* `wasmtime_{anyref,externref,val}_clone` no longer have an unnecessary context parameter.* `wasmtime_{anyref,externref,val}_unroot` no longer have an unnecessary context parameter.Changes in the C/C++ APIs are:* `Result::{ok,err}_ref` APIs were added in addition to the preexisting rvalue accessors.* Loading/storing typed arguments now has an overload for `const T&` and `T&&` which behaves differently. Notably transferring ownership for `T&&` and not for `const T&`. This means that passing parameters when calling a wasm function uses `const T&`, but passing results from a host import uses `T&&`.* `TypedFunc::call` now uses `const Params&` instead of `Params` to explicitly specify it doesn't modify the parameters and forces using the `const T&` store method.* `Store::gc` is now a convenience method for `store.context().gc()`* `ExternRef`, `AnyRef`, and `Val` now have ownership semantics and destructors. This matches the spirit of #11514 for Rust but models it in C++ as well. This required filling out move/copy constructors/assignments.* The explicit `ExternRef` now takes `std::any` instead of `T`.* Minor issues related to ownership are fixed in `Val` bindings.Valgrind was used to ensure that there were no leaks for the test suitewhich additionally resulted in a number of `*_delete` calls being addedto tests using the C API (accidental omissions).The original goal of this change was to be a patch release for 37.0.1 toenable updating wasmtime-py to the 37.0.x releases of Wasmtime. In theend though the changes here were broad enough that I no longer feel thatthis is a good idea, so wasmtime-py will be skipping the 37 version ofWasmtime.* Run `clang-format`prtest:full List of files: /wasmtime-44.0.1/examples/multi.c

57ba95e9 - Fixed bugs in the C thread example program and updated some comments for build command. (#11155)

Mon, 30 Jun 2025 17:37:35 +0000

Fixed bugs in the C thread example program and updated some comments for build command. (#11155)* Remove the cargo command for examples/*.c and fix thread example code.* Add _GNU_SOURCE. List of files: /wasmtime-44.0.1/examples/multi.c

8f03b22e - Remove wasm-c-api submodule (#8170)

Mon, 18 Mar 2024 18:58:11 +0000

Remove wasm-c-api submodule (#8170)* Remove wasm-c-api submoduleThis submodule hasn't been updated in ~3 years at this point and weadditionally don't need most of the submodule. Instead add a script tocopy the files we need and verify in CI that the files are up-to-date.This also makes using the C API a bit nicer where you don't have to havetwo `include` directories with a Wasmtime source tree, just onesuffices.* Don't format wasm.h{,h} vendored files List of files: /wasmtime-44.0.1/examples/multi.c

f8fee938 - add clang format (#7601)

Wed, 29 Nov 2023 18:39:04 +0000

add clang format (#7601)* add clang-formatWe chose WebKit style because out of all the builtin styles it seems theclosest to what already exists in wasmtime.Signed-off-by: Tyler Rockwood * c-api: don't reorder headersThe order here mattersSigned-off-by: Tyler Rockwood * c-api: apply clang-formatSigned-off-by: Tyler Rockwood * fiber: apply clang-formatSigned-off-by: Tyler Rockwood * runtime: apply clang-formatSigned-off-by: Tyler Rockwood * examples: apply clang formatSigned-off-by: Tyler Rockwood * tests: apply clang-formatSigned-off-by: Tyler Rockwood * ci: add clang-format checksSigned-off-by: Tyler Rockwood * clang-format: keep braces on the same lineThis is more the existing styleSigned-off-by: Tyler Rockwood * remove clang-formatJust use the tool defaults (LLVM)Signed-off-by: Tyler Rockwood * Fix ci nameSigned-off-by: Tyler Rockwood * manually reformat a couple of commentsprtest:fullSigned-off-by: Tyler Rockwood * disable formatting for doc-wasm.hSigned-off-by: Tyler Rockwood * manually reformat wasmtime.hSigned-off-by: Tyler Rockwood * disable formattingTo prevent a link from being brokenSigned-off-by: Tyler Rockwood * examples: fixing build commandsSigned-off-by: Tyler Rockwood * fix parameter commentSigned-off-by: Tyler Rockwood ---------Signed-off-by: Tyler Rockwood List of files: /wasmtime-44.0.1/examples/multi.c

2ba3025e - Add cmake compatibility to c-api (#4369)

Fri, 22 Jul 2022 17:22:36 +0000

Add cmake compatibility to c-api (#4369)* Add cmake compatibility to c-api * Add CMake documentation to wasmtime.h * Add CMake instructions in examples * Modify CI for CMake support * Use correct rust in CI * Trigger build * Refactor run-examples * Reintroduce example_to_run in run-examples * Replace run-examples crate with cmake * Fix markdown formatting in examples readme * Fix cmake test quotes * Build rust wasm before cmake tests * Pass CTEST_OUTPUT_ON_FAILURE * Another cmake test * Handle os differences in cmake test * Fix bugs in memory and multimemory examples List of files: /wasmtime-44.0.1/examples/multi.c

7a1b7cdf - Implement RFC 11: Redesigning Wasmtime's APIs (#2897)

Thu, 03 Jun 2021 14:10:53 +0000

Implement RFC 11: Redesigning Wasmtime's APIs (#2897)Implement Wasmtime's new API as designed by RFC 11. This is quite a large commit which has had lots of discussion externally, so for more information it's best to read the RFC thread and the PR thread. List of files: /wasmtime-44.0.1/examples/multi.c

f94db655 - Update WebAssembly C API submodule to latest commit. (#2579)

Thu, 14 Jan 2021 15:36:12 +0000

Update WebAssembly C API submodule to latest commit. (#2579)* Update WebAssembly C API submodule to latest commit. This commit updates the WebAssembly C API submodule (for `wasm.h`) to the latest commit out of master. This fixes the behavior of `wasm_name_new_from_string` such that it no longer copies the null character into the name, which caused unexpected failures when using the Wasmtime linker as imports wouldn't resolve when the null was present. Along with this change were breaking changes to `wasm_func_call`, the host callback signatures, and `wasm_instance_new` to take a vector type instead of a pointer to an unsized array. As a result, Wasmtime language bindings based on the C API will need to be updated once this change is pulled in. Fixes #2211. Fixes #2131. * Update Doxygen comments for wasm.h changes. List of files: /wasmtime-44.0.1/examples/multi.c

eb650f6f - filesystem example (#2236)

Tue, 29 Sep 2020 18:20:14 +0000

filesystem example (#2236) List of files: /wasmtime-44.0.1/examples/multi.c

a817470f - Fix signature of wasmtime_module_new

Wed, 15 Jul 2020 19:07:36 +0000

Fix signature of wasmtime_module_new List of files: /wasmtime-44.0.1/examples/multi.c

15c68f2c - Disconnects `Store` state fields from `Compiler` (#1761)

Tue, 02 Jun 2020 18:44:39 +0000

Disconnects `Store` state fields from `Compiler` (#1761)* Moves CodeMemory, VMInterrupts and SignatureRegistry from Compiler * CompiledModule holds CodeMemory and GdbJitImageRegistration * Store keeps track of its JIT code * Makes "jit_int.rs" stuff Send+Sync * Adds the threads example. List of files: /wasmtime-44.0.1/examples/multi.c

57fb1c69 - Enable the multi-value proposal by default (#1667)

Wed, 06 May 2020 17:37:29 +0000

Enable the multi-value proposal by default (#1667)This was merged into the wasm spec upstream in WebAssembly/spec#1145, so let's follow the spec and enable it by default here as well! List of files: /wasmtime-44.0.1/examples/multi.c

bd374fd6 - Add Wasmtime-specific C API functions to return errors (#1467)

Mon, 06 Apr 2020 20:13:06 +0000

Add Wasmtime-specific C API functions to return errors (#1467)* Add Wasmtime-specific C API functions to return errors This commit adds new `wasmtime_*` symbols to the C API, many of which mirror the existing counterparts in the `wasm.h` header. These APIs are enhanced in a number of respects: * Detailed error information is now available through a `wasmtime_error_t`. Currently this only exposes one function which is to extract a string version of the error. * There is a distinction now between traps and errors during instantiation and function calling. Traps only happen if wasm traps, and errors can happen for things like runtime type errors when interacting with the API. * APIs have improved safety with respect to embedders where the lengths of arrays are now taken as explicit parameters rather than assumed from other parameters. * Handle trap updates * Update C examples * Fix memory.c compile on MSVC * Update test assertions * Refactor C slightly * Bare-bones .NET update * Remove bogus nul handling List of files: /wasmtime-44.0.1/examples/multi.c

f40693d9 - Fix calls to wasmtime_wat2wasm to remove engine argument.

Thu, 26 Mar 2020 01:55:54 +0000

Fix calls to wasmtime_wat2wasm to remove engine argument. List of files: /wasmtime-44.0.1/examples/multi.c

3c51d3ad - Move all examples to a top-level directory (#1286)

Wed, 11 Mar 2020 20:37:24 +0000

Move all examples to a top-level directory (#1286)* Move all examples to a top-level directory This commit moves all API examples (Rust and C) to a top-level `examples` directory. This is intended to make it more discoverable and conventional as to where examples are located. Additionally all examples are now available in both Rust and C to see how to execute the example in the language you're familiar with. The intention is that as more languages are supported we'd add more languages as examples here too. Each example is also accompanied by either a `*.wat` file which is parsed as input, or a Rust project in a `wasm` folder which is compiled as input. A simple driver crate was also added to `crates/misc` which executes all the examples on CI, ensuring the C and Rust examples all execute successfully. List of files: /wasmtime-44.0.1/examples/multi.c