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fix(runtime-c-api) wasmer_instance_context_data_get returns void if instance is null.

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This commit is contained in:
Ivan Enderlin
2020-01-20 15:52:14 +01:00
parent c89f53b6fa
commit df2b93ea81
1 changed files with 13 additions and 1 deletions
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14
lib/runtime-c-api/src/instance.rs
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@ -469,13 +469,25 @@ pub extern "C" fn wasmer_instance_context_memory(
memory as *const Memory as *const wasmer_memory_t memory as *const Memory as *const wasmer_memory_t
} }
/// Gets the `data` field within the context. /// Gets the data that can be hold by an instance.
///
/// This function is complementary of
/// `wasmer_instance_context_data_set()`. Please read its
/// documentation. You can also read the documentation of
/// `wasmer_instance_context_t` to get other examples.
///
/// This function returns nothing if `ctx` is a null pointer.
#[allow(clippy::cast_ptr_alignment)] #[allow(clippy::cast_ptr_alignment)]
#[no_mangle] #[no_mangle]
pub extern "C" fn wasmer_instance_context_data_get( pub extern "C" fn wasmer_instance_context_data_get(
ctx: *const wasmer_instance_context_t, ctx: *const wasmer_instance_context_t,
) -> *mut c_void { ) -> *mut c_void {
if ctx.is_null() {
return ptr::null_mut() as _;
}
let ctx = unsafe { &*(ctx as *const Ctx) }; let ctx = unsafe { &*(ctx as *const Ctx) };
ctx.data ctx.data
} }