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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CONTENT_PUBLIC_BROWSER_RENDER_PROCESS_HOST_H_ | 5 #ifndef CONTENT_PUBLIC_BROWSER_RENDER_PROCESS_HOST_H_ |
6 #define CONTENT_PUBLIC_BROWSER_RENDER_PROCESS_HOST_H_ | 6 #define CONTENT_PUBLIC_BROWSER_RENDER_PROCESS_HOST_H_ |
7 | 7 |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 #include <stdint.h> | 9 #include <stdint.h> |
10 | 10 |
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371 // assigned. | 371 // assigned. |
372 // Note that a process hosting ServiceWorkers will be implicitly handled by | 372 // Note that a process hosting ServiceWorkers will be implicitly handled by |
373 // (2) during ServiceWorker initialization, and SharedWorkers will be handled | 373 // (2) during ServiceWorker initialization, and SharedWorkers will be handled |
374 // by (1) since a page needs to commit before it can create a SharedWorker. | 374 // by (1) since a page needs to commit before it can create a SharedWorker. |
375 // | 375 // |
376 // While a process is unused, it is still suitable to host a URL that | 376 // While a process is unused, it is still suitable to host a URL that |
377 // requires a dedicated process. | 377 // requires a dedicated process. |
378 virtual bool IsUnused() = 0; | 378 virtual bool IsUnused() = 0; |
379 virtual void SetIsUsed() = 0; | 379 virtual void SetIsUsed() = 0; |
380 | 380 |
| 381 // Return true if the host has not been used. This is stronger than IsUnused() |
| 382 // in that it checks if this RPH has ever been used to render at all, rather |
| 383 // than just no being suitable to host a URL that requires a dedicated |
| 384 // process. |
| 385 // TODO(alexmos): can this be unified with IsUnused()? See also |
| 386 // crbug.com/738634. |
| 387 virtual bool HostHasNotBeenUsed() = 0; |
| 388 |
381 // Returns the current number of active views in this process. Excludes | 389 // Returns the current number of active views in this process. Excludes |
382 // any RenderViewHosts that are swapped out. | 390 // any RenderViewHosts that are swapped out. |
383 size_t GetActiveViewCount(); | 391 size_t GetActiveViewCount(); |
384 | 392 |
385 // Posts |task|, if this RenderProcessHost is ready or when it becomes ready | 393 // Posts |task|, if this RenderProcessHost is ready or when it becomes ready |
386 // (see RenderProcessHost::IsReady method). The |task| might not run at all | 394 // (see RenderProcessHost::IsReady method). The |task| might not run at all |
387 // (e.g. if |render_process_host| is destroyed before becoming ready). This | 395 // (e.g. if |render_process_host| is destroyed before becoming ready). This |
388 // function can only be called on the browser's UI thread (and the |task| will | 396 // function can only be called on the browser's UI thread (and the |task| will |
389 // be posted back on the UI thread). | 397 // be posted back on the UI thread). |
390 void PostTaskWhenProcessIsReady(base::OnceClosure task); | 398 void PostTaskWhenProcessIsReady(base::OnceClosure task); |
391 | 399 |
392 // Static management functions ----------------------------------------------- | 400 // Static management functions ----------------------------------------------- |
393 | 401 |
| 402 // Possibly start an unbound, spare RenderProcessHost. A subsequent creation |
| 403 // of a RenderProcessHost with a matching browser_context may use this |
| 404 // preinitialized RenderProcessHost, improving performance. |
| 405 // |
| 406 // It is safe to call this multiple times or when it is not certain that the |
| 407 // spare renderer will be used, although calling this too eagerly may reduce |
| 408 // performance as unnecessary RenderProcessHosts are created. The spare |
| 409 // renderer will only be used if it using the default StoragePartition of a |
| 410 // matching BrowserContext. |
| 411 // |
| 412 // The spare RenderProcessHost is meant to be created in a situation where a |
| 413 // navigation is imminent and it is unlikely an existing RenderProcessHost |
| 414 // will be used, for example in a cross-site navigation when a Service Worker |
| 415 // will need to be started. |
| 416 static void WarmupSpareRenderProcessHost( |
| 417 content::BrowserContext* browser_context); |
| 418 |
394 // Flag to run the renderer in process. This is primarily | 419 // Flag to run the renderer in process. This is primarily |
395 // for debugging purposes. When running "in process", the | 420 // for debugging purposes. When running "in process", the |
396 // browser maintains a single RenderProcessHost which communicates | 421 // browser maintains a single RenderProcessHost which communicates |
397 // to a RenderProcess which is instantiated in the same process | 422 // to a RenderProcess which is instantiated in the same process |
398 // with the Browser. All IPC between the Browser and the | 423 // with the Browser. All IPC between the Browser and the |
399 // Renderer is the same, it's just not crossing a process boundary. | 424 // Renderer is the same, it's just not crossing a process boundary. |
400 | 425 |
401 static bool run_renderer_in_process(); | 426 static bool run_renderer_in_process(); |
402 | 427 |
403 // This also calls out to ContentBrowserClient::GetApplicationLocale and | 428 // This also calls out to ContentBrowserClient::GetApplicationLocale and |
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440 static void SetMaxRendererProcessCount(size_t count); | 465 static void SetMaxRendererProcessCount(size_t count); |
441 | 466 |
442 // Returns the current maximum number of renderer process hosts kept by the | 467 // Returns the current maximum number of renderer process hosts kept by the |
443 // content module. | 468 // content module. |
444 static size_t GetMaxRendererProcessCount(); | 469 static size_t GetMaxRendererProcessCount(); |
445 }; | 470 }; |
446 | 471 |
447 } // namespace content. | 472 } // namespace content. |
448 | 473 |
449 #endif // CONTENT_PUBLIC_BROWSER_RENDER_PROCESS_HOST_H_ | 474 #endif // CONTENT_PUBLIC_BROWSER_RENDER_PROCESS_HOST_H_ |
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