15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef CONTENT_PUBLIC_BROWSER_HISTOGRAM_FETCHER_H_ 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define CONTENT_PUBLIC_BROWSER_HISTOGRAM_FETCHER_H_ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/basictypes.h" 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/callback.h" 10eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#include "base/time/time.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "content/common/content_export.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 13c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)namespace base { 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class MessageLoop; 15c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)} 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace content { 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Fetch histogram data asynchronously from the various child processes, into 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// the browser process. This method is used by the metrics services in 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// preparation for a log upload. It contacts all processes, and get them to 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// upload to the browser any/all changes to histograms. When all changes have 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// been acquired, or when the wait time expires (whichever is sooner), post the 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// callback to the specified message loop. Note the callback is posted exactly 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// once. 26c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)CONTENT_EXPORT void FetchHistogramsAsynchronously( 27c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) base::MessageLoop* callback_thread, 28c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) const base::Closure& callback, 29c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) base::TimeDelta wait_time); 30c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace content 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // CONTENT_PUBLIC_BROWSER_HISTOGRAM_FETCHER_H_ 34