Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 1 | // Copyright 2013 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef CHROME_BROWSER_NACL_HOST_PNACL_HOST_H_ |
| 6 | #define CHROME_BROWSER_NACL_HOST_PNACL_HOST_H_ |
| 7 | |
| 8 | #include <map> |
| 9 | |
| 10 | #include "base/callback_forward.h" |
| 11 | #include "base/memory/singleton.h" |
| 12 | #include "base/memory/weak_ptr.h" |
| 13 | #include "base/threading/thread_checker.h" |
| 14 | #include "chrome/browser/nacl_host/nacl_file_host.h" |
Ben Murdoch | a3f7b4e | 2013-07-24 10:36:34 +0100 | [diff] [blame] | 15 | #include "components/nacl/common/pnacl_types.h" |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 16 | #include "ipc/ipc_platform_file.h" |
| 17 | |
| 18 | namespace pnacl { |
| 19 | class PnaclHostTest; |
| 20 | class PnaclTranslationCache; |
| 21 | } |
| 22 | |
| 23 | // Shared state (translation cache) and common utilities (temp file creation) |
| 24 | // for all PNaCl translations. Unless otherwise specified, all methods should be |
| 25 | // called on the IO thread. |
| 26 | class PnaclHost { |
| 27 | public: |
| 28 | typedef base::Callback<void(IPC::PlatformFileForTransit)> TempFileCallback; |
| 29 | typedef base::Callback<void(IPC::PlatformFileForTransit, bool is_hit)> |
| 30 | NexeFdCallback; |
| 31 | |
| 32 | static PnaclHost* GetInstance(); |
| 33 | |
| 34 | PnaclHost(); |
| 35 | ~PnaclHost(); |
| 36 | void Init(); |
| 37 | |
| 38 | // Creates a temporary file that will be deleted when the last handle |
| 39 | // is closed, or earlier. Returns a PlatformFileForTransit usable by the |
| 40 | // process identified by |process_handle|. |
| 41 | void CreateTemporaryFile(base::ProcessHandle process_handle, |
| 42 | TempFileCallback cb); |
| 43 | |
| 44 | // Create a temporary file, which will be deleted by the time the last |
| 45 | // handle is closed (or earlier on POSIX systems), to use for the nexe |
| 46 | // with the cache information given in |cache_info|. The specific instance |
| 47 | // is identified by the combination of |render_process_id| and |pp_instance|. |
| 48 | // Returns by calling |cb| with a PlatformFileForTransit usable by the process |
| 49 | // identified by |process_handle|. If the nexe is already present |
| 50 | // in the cache, |is_hit| is set to true and the contents of the nexe |
| 51 | // have been copied into the temporary file. Otherwise |is_hit| is set to |
| 52 | // false and the temporary file will be writeable. |
| 53 | // Currently the implementation is a stub, which always sets is_hit to false |
| 54 | // and calls the implementation of CreateTemporaryFile. |
| 55 | // If the cache request was a miss, the caller is expected to call |
| 56 | // TranslationFinished after it finishes translation to allow the nexe to be |
| 57 | // stored in the cache. |
| 58 | void GetNexeFd(int render_process_id, |
| 59 | base::ProcessHandle process_handle, |
| 60 | int render_view_id, |
| 61 | int pp_instance, |
| 62 | const nacl::PnaclCacheInfo& cache_info, |
| 63 | const NexeFdCallback& cb); |
| 64 | |
| 65 | // Called after the translation of a pexe instance identified by |
Ben Murdoch | bb1529c | 2013-08-08 10:24:53 +0100 | [diff] [blame^] | 66 | // |render_process_id| and |pp_instance| finishes. If |success| is true, |
| 67 | // store the nexe translated for the instance in the cache. |
| 68 | void TranslationFinished(int render_process_id, |
| 69 | int pp_instance, |
| 70 | bool success); |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 71 | |
| 72 | // Called when the renderer identified by |render_process_id| is closing. |
| 73 | // Clean up any outstanding translations for that renderer. |
| 74 | void RendererClosing(int render_process_id); |
| 75 | |
| 76 | private: |
| 77 | // PnaclHost is a singleton because there is only one translation cache, and |
| 78 | // so that the BrowsingDataRemover can clear it even if no translation has |
| 79 | // ever been started. |
| 80 | friend struct DefaultSingletonTraits<PnaclHost>; |
| 81 | friend class pnacl::PnaclHostTest; |
| 82 | enum CacheState { |
| 83 | CacheUninitialized, |
| 84 | CacheInitializing, |
| 85 | CacheReady |
| 86 | }; |
| 87 | struct PendingTranslation { |
| 88 | public: |
| 89 | PendingTranslation(); |
| 90 | ~PendingTranslation(); |
| 91 | int render_view_id; |
| 92 | IPC::PlatformFileForTransit nexe_fd; |
| 93 | NexeFdCallback callback; |
| 94 | nacl::PnaclCacheInfo cache_info; |
| 95 | }; |
| 96 | |
| 97 | typedef std::pair<int, int> TranslationID; |
| 98 | typedef std::map<TranslationID, PendingTranslation> PendingTranslationMap; |
| 99 | |
| 100 | void InitForTest(base::FilePath temp_dir); |
| 101 | void OnCacheInitialized(int error); |
| 102 | static IPC::PlatformFileForTransit DoCreateTemporaryFile( |
| 103 | base::ProcessHandle process_handle, |
| 104 | base::FilePath temp_dir_); |
| 105 | void ReturnMiss(TranslationID id, IPC::PlatformFileForTransit fd); |
| 106 | |
| 107 | CacheState cache_state_; |
| 108 | base::FilePath temp_dir_; |
| 109 | scoped_ptr<pnacl::PnaclTranslationCache> disk_cache_; |
| 110 | PendingTranslationMap pending_translations_; |
| 111 | base::ThreadChecker thread_checker_; |
| 112 | base::WeakPtrFactory<PnaclHost> weak_factory_; |
| 113 | DISALLOW_COPY_AND_ASSIGN(PnaclHost); |
| 114 | }; |
| 115 | |
| 116 | #endif // CHROME_BROWSER_NACL_HOST_PNACL_HOST_H_ |