Fix: prevent writer threads from exceeding the maximum (#616)

src/modules/candidateWriter.ts

@@ -20,7 +20,7 @@ import Module from './module.js';
  * This class may be run concurrently with other classes.
  */
 export default class CandidateWriter extends Module {
-  private static readonly THREAD_SEMAPHORE = new Semaphore(1);
+  private static readonly THREAD_SEMAPHORE = new Semaphore(Number.MAX_SAFE_INTEGER);
 
   // WARN(cemmer): there is an undocumented semaphore max value that can be used, the full
   //  4,700,372,992 bytes of a DVD+R will cause runExclusive() to never run or return.
@@ -37,7 +37,7 @@ export default class CandidateWriter extends Module {
     this.options = options;
 
     // This will be the same value globally, but we can't know the value at file import time
-    if (CandidateWriter.THREAD_SEMAPHORE.getValue() !== options.getWriterThreads()) {
+    if (options.getWriterThreads() < CandidateWriter.THREAD_SEMAPHORE.getValue()) {
       CandidateWriter.THREAD_SEMAPHORE.setValue(options.getWriterThreads());
     }
   }