Function createSingleFileWatcherPerName

test/fixtures/snapshot/typescript.js:6440–6469

(watchFile, useCaseSensitiveFileNames)

    }
    /* @internal */
    function createSingleFileWatcherPerName(watchFile, useCaseSensitiveFileNames) {
        var cache = new ts.Map();
        var callbacksCache = ts.createMultiMap();
        var toCanonicalFileName = ts.createGetCanonicalFileName(useCaseSensitiveFileNames);
        return function (fileName, callback, pollingInterval, options) {
            var path = toCanonicalFileName(fileName);
            var existing = cache.get(path);
            if (existing) {
                existing.refCount++;
            }
            else {
                cache.set(path, {
                    watcher: watchFile(fileName, function (fileName, eventKind) { return ts.forEach(callbacksCache.get(path), function (cb) { return cb(fileName, eventKind); }); }, pollingInterval, options),
                    refCount: 1
                });
            }
            callbacksCache.add(path, callback);
            return {
                close: function () {
                    var watcher = ts.Debug.checkDefined(cache.get(path));
                    callbacksCache.remove(path, callback);
                    watcher.refCount--;
                    if (watcher.refCount)
                        return;
                    cache.delete(path);
                    ts.closeFileWatcherOf(watcher);
                }
            };
        };
    }
    ts.createSingleFileWatcherPerName = createSingleFileWatcherPerName;
    /**
     * Returns true if file status changed