igir/dist/src/async/candidateWriterSemaphore.js

🕹 A zero-setup ROM collection manager that sorts, filters, extracts or archives, patches, and reports on collections of any size on any OS.

import KeyedMutex from "./keyedMutex.js";
import MappableSemaphore from "./mappableSemaphore.js";
class CandidateWriterSemaphore {
  mappableSemaphore;
  outputPathsMutex = new KeyedMutex(1e3);
  constructor(threads) {
    this.mappableSemaphore = new MappableSemaphore(threads);
  }
  /**
   * Return the number of currently active candidate write operations.
   */
  openLocks() {
    return this.mappableSemaphore.openLocks();
  }
  /**
   * Run some {@link callback}. for every {@link candidates}.
   */
  async map(candidates, callback) {
    const candidatesSorted = candidates.toSorted((a, b) => {
      if (a.getRomsWithFiles().length !== b.getRomsWithFiles().length) {
        return a.getRomsWithFiles().length - b.getRomsWithFiles().length;
      }
      return a.getName().localeCompare(b.getName());
    });
    return await this.mappableSemaphore.map(candidatesSorted, async (candidate) => {
      const outputFilePaths = candidate.getRomsWithFiles().map((romWithFiles) => romWithFiles.getOutputFile().getFilePath());
      return await this.outputPathsMutex.runExclusiveForKeys(outputFilePaths, async () => {
        return await callback(candidate);
      });
    });
  }
}
export {
  CandidateWriterSemaphore as default
};
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