Just want to make sure I'm using InterProcessLock Correctly

General JUCE discussion
1

Hey, just looking for someone to let me know if I’m using InterProcessLock Correctly.

Basically, I have a ValueTree that needs to get saved to disk periodically.

Right now my save() function looks something like this

void Profile::save()
{
    //SaveLock is declared in the memeber variables as a InterProcessLock
    const InterProcessLock::ScopedLockType sl (saveLock);
    
    saveFile.deleteFile();
    FileOutputStream os(saveFile);
    playerTree.writeToStream(os);
    lastModTime = saveFile.getLastModificationTime();
    needsToSave = false;
    autoSaveCounter = 0;
}

Everything works fine, I’m just not too familiar with multithreading and locks so just want to double check this is correct. Sorry if this posts seems dumb lol

2

This lock is designed to work between different processes, not between threads. You want to use a CriticalSection for threads. Also, what is the data you want to protect from multithread access? Unless you are protecting file access, I would NOT lock for the file operation. Ideally you could lock, copy the data, unlock and do file operations with copy.