author Chris Pearce <>
Tue, 31 Jan 2017 21:28:41 +1300
changeset 360931 0ec2488aebbd2f493cb72b99086bf080337189d9
parent 350865 ee8798338529a44eab6a7ec005a6321001eff247
permissions -rw-r--r--
Bug 1333489 - Record time spent waiting on sync IPC. r=billm,francois We're curious how long we spend waiting on sync IPCs to complete. So this patch adds telemetry which reports that, on a per message basis, so we can identify problem messages. MozReview-Commit-ID: CB4UaitPBeq

/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at */

#include "nsIInputStream.idl"
#include "nsISupports.idl"
#include "nsIObserver.idl"
#include "nsIObjectOutputStream.idl"

#include "mozilla/UniquePtr.h"

interface nsIStartupCache : nsISupports

  /** This interface is provided for testing purposes only, basically
   *  just to solve link vagaries. See docs in StartupCache.h
   *  GetBuffer, PutBuffer, and InvalidateCache act as described 
   *  in that file. */

  uint32_t getBuffer(in string aID, out charPtr aBuffer);
  /* A more convenient interface for using from C++.  */
  nsresult GetBuffer(const char* id, mozilla::UniquePtr<char[]>* outbuf, uint32_t* length)
    char* buf;
    nsresult rv = GetBuffer(id, &buf, length);
    NS_ENSURE_SUCCESS(rv, rv);
    return rv;

  void putBuffer(in string aID, in string aBuffer, 
                            in uint32_t aLength);
  void invalidateCache();

  /** In debug builds, wraps this object output stream with a stream that will 
   *  detect and prevent the write of a multiply-referenced non-singleton object 
   *  during serialization. In non-debug, returns an add-ref'd pointer to
   *  original stream, unwrapped. */
  nsIObjectOutputStream getDebugObjectOutputStream(in nsIObjectOutputStream aStream);

  /* Allows clients to simulate the behavior of ObserverService. */
  readonly attribute nsIObserver observer;