import * as rpc from "vscode-jsonrpc/node";
import { Cursor } from "../../tree";
export declare function setCacheSizeProvider(provider: () => {
    local: number;
    remote: number;
    refs: number;
}): void;
/**
 * Extracts the sourcePath from a tree object, either directly from a SourceFile
 * or by finding the nearest SourceFile via a cursor.
 *
 * @param tree The tree object to extract sourcePath from
 * @param cursor Optional cursor to find the nearest SourceFile
 * @returns The sourcePath or empty string if not found
 */
export declare function extractSourcePath(tree: any, cursor?: Cursor): string;
/**
 * Initializes the metrics CSV file with a header if it doesn't already exist or is empty.
 * If the file already contains the correct header, this function is a no-op.
 *
 * @param metricsCsv The path to the CSV file for recording metrics
 * @param logger Optional logger for warnings
 */
export declare function initializeMetricsCsv(metricsCsv?: string, logger?: rpc.Logger): void;
/**
 * Wraps an RPC request handler to record performance metrics to a CSV file.
 *
 * @param requestType The request type name (e.g., "Visit", "GetObject")
 * @param metricsCsv Optional path to the CSV file for recording metrics
 * @param handlerFactory A function that creates the handler with a mutable context for setting the target
 * @returns A request handler compatible with rpc.MessageConnection#onRequest
 */
export declare function withMetrics<P, R>(requestType: string, metricsCsv: string | undefined, handlerFactory: (context: {
    target: string;
}) => (request: P) => Promise<R>): (request: P) => Promise<R>;
/**
 * Wraps an RPC request handler without parameters (RequestType0) to record performance metrics.
 *
 * @param requestType The request type name (e.g., "GetLanguages", "GetRecipes")
 * @param metricsCsv Optional path to the CSV file for recording metrics
 * @param handlerFactory A function that creates the handler with a mutable context for setting the target
 * @returns A request handler compatible with rpc.MessageConnection#onRequest
 */
export declare function withMetrics0<R>(requestType: string, metricsCsv: string | undefined, handlerFactory: (context: {
    target: string;
}) => () => Promise<R>): (token: any) => Promise<R>;
//# sourceMappingURL=metrics.d.ts.map