startupcache/nsIStartupCache.idl
author Jim Chen <nchen@mozilla.com>
Wed, 14 Sep 2016 12:46:50 -0400
changeset 355257 61e6762b20d0fa6f64b61e9ee2fe4adaa9417a20
parent 321788 2a3bc10a643708d268364d928c2342bb5930f8d7
child 367755 419e1a311337ecdf208f5474f182d1f88102cc9f
permissions -rw-r--r--
Bug 1291384 - 2. Convert GeckoProfile.getDB calls to BrowserDB.from calls; r=nalexander Mass convert GeckoProfile.getDB() calls to BrowserDB.from() calls, whether using Context or GeckoProfile.

/* -*- 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 http://mozilla.org/MPL/2.0/. */

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

%{C++
#include "mozilla/UniquePtr.h"
%}

[uuid(25957820-90a1-428c-8739-b0845d3cc534)]
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);
%{C++
  /* 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);
    outbuf->reset(buf);
    return rv;
  }
%}

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

  /** 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 check whether the one-time writeout after startup 
   * has finished yet, and also to set this variable as needed (so test
   * code can fire mulitple startup writes if needed).
   */
  boolean startupWriteComplete();
  void resetStartupWriteTimer();

  /* Instruct clients to always post cache ages to Telemetry, even in
     cases where it would not normally make sense.  */
  void recordAgesAlways();

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