fluvio-smartmodule 0.50.1

Used by Fluvio SmartModule
Documentation 
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/// Allocate memory into the module's linear memory
/// and return the offset to the start of the block.
#[unsafe(no_mangle)]
pub fn alloc(len: usize) -> *mut u8 {
    // create a new mutable buffer with capacity `len`
    let mut buf = Vec::with_capacity(len);
    // take a mutable pointer to the buffer
    let ptr = buf.as_mut_ptr();
    // take ownership of the memory block and
    // ensure the its destructor is not
    // called when the object goes out of scope
    // at the end of the function
    std::mem::forget(buf);
    // return the pointer so the runtime
    // can write data at this offset
    ptr
}

#[unsafe(no_mangle)]
#[allow(clippy::missing_safety_doc)]
pub unsafe fn dealloc(ptr: *mut u8, size: usize) {
    unsafe {
        let data = Vec::from_raw_parts(ptr, size, size);
        std::mem::drop(data);
    }
}