hardhat
Version:
Hardhat is an extensible developer tool that helps smart contract developers increase productivity by reliably bringing together the tools they want.
64 lines • 2.01 kB
JavaScript
;
// Based on: https://github.com/notenoughneon/await-semaphore/blob/f117a6b59324038c9e8ee04c70c328215a727812/index.ts
// which is distributed under this license: https://github.com/notenoughneon/await-semaphore/blob/f117a6b59324038c9e8ee04c70c328215a727812/LICENSE
Object.defineProperty(exports, "__esModule", { value: true });
exports.Mutex = exports.Semaphore = void 0;
/* eslint-disable @nomicfoundation/hardhat-internal-rules/only-hardhat-error */
class Semaphore {
constructor(count) {
this._tasks = [];
this.count = count;
}
acquire() {
return new Promise((res) => {
const task = () => {
let released = false;
res(() => {
if (!released) {
released = true;
this.count++;
this._sched();
}
});
};
this._tasks.push(task);
if (process !== undefined && process.nextTick !== undefined) {
process.nextTick(this._sched.bind(this));
}
else {
setImmediate(this._sched.bind(this));
}
});
}
use(f) {
return this.acquire().then((release) => {
return f()
.then((res) => {
release();
return res;
})
.catch((err) => {
release();
throw err;
});
});
}
_sched() {
if (this.count > 0 && this._tasks.length > 0) {
this.count--;
const next = this._tasks.shift();
if (next === undefined) {
throw new Error("Unexpected undefined value in tasks list");
}
next();
}
}
}
exports.Semaphore = Semaphore;
class Mutex extends Semaphore {
constructor() {
super(1);
}
}
exports.Mutex = Mutex;
//# sourceMappingURL=index.js.map