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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
const targetDir = Deno.execPath().replace(/[^\/\\]+$/, "");
const [libPrefix, libSuffix] = {
darwin: ["lib", "dylib"],
linux: ["lib", "so"],
windows: ["", "dll"],
}[Deno.build.os];
const libPath = `${targetDir}/${libPrefix}test_ffi.${libSuffix}`;
const dylib = Deno.dlopen(
libPath,
{
store_function: {
parameters: ["function"],
result: "void",
},
call_stored_function: {
parameters: [],
result: "void",
},
call_stored_function_thread_safe_and_log: {
parameters: [],
result: "void",
},
} as const,
);
let retry = false;
const tripleLogCallback = () => {
console.log("Sync");
queueMicrotask(() => {
console.log("Async");
callback.unref();
});
setTimeout(() => {
console.log("Timeout");
callback.unref();
if (retry) {
// Re-ref and retry the call to make sure re-refing works.
console.log("RETRY THREAD SAFE");
retry = false;
callback.ref();
dylib.symbols.call_stored_function_thread_safe_and_log();
}
}, 100);
};
const callback = Deno.UnsafeCallback.threadSafe(
{
parameters: [],
result: "void",
} as const,
tripleLogCallback,
);
// Store function
dylib.symbols.store_function(callback.pointer);
// Synchronous callback logging
console.log("SYNCHRONOUS");
// This function only calls the callback, and does not log.
dylib.symbols.call_stored_function();
console.log("STORED_FUNCTION called");
// Wait to make sure synch logging and async logging
await new Promise((res) => setTimeout(res, 200));
// Ref once to make sure both `queueMicrotask()` and `setTimeout()`
// must resolve and unref before isolate exists.
// One ref'ing has been done by `threadSafe` constructor.
callback.ref();
console.log("THREAD SAFE");
retry = true;
// This function calls the callback and logs 'STORED_FUNCTION called'
dylib.symbols.call_stored_function_thread_safe_and_log();
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