media/mtransport/runnable_utils.h@97036ab72558 (annotated)
media/mtransport/runnable_utils.h
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* vim: set ts=2 et sw=2 tw=80: */ |
| michael@0 | 3 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this file, |
| michael@0 | 5 | * You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | // Original author: ekr@rtfm.com |
| michael@0 | 8 | |
| michael@0 | 9 | #ifndef runnable_utils_h__ |
| michael@0 | 10 | #define runnable_utils_h__ |
| michael@0 | 11 | |
| michael@0 | 12 | #include "nsThreadUtils.h" |
| michael@0 | 13 | #include "mozilla/RefPtr.h" |
| michael@0 | 14 | |
| michael@0 | 15 | // Abstract base class for all of our templates |
| michael@0 | 16 | namespace mozilla { |
| michael@0 | 17 | |
| michael@0 | 18 | class runnable_args_base : public nsRunnable { |
| michael@0 | 19 | public: |
| michael@0 | 20 | NS_IMETHOD Run() = 0; |
| michael@0 | 21 | virtual bool returns_value() const { return false; } |
| michael@0 | 22 | }; |
| michael@0 | 23 | |
| michael@0 | 24 | // The generated file contains four major function templates |
| michael@0 | 25 | // (in variants for arbitrary numbers of arguments up to 10, |
| michael@0 | 26 | // which is why it is machine generated). The four templates |
| michael@0 | 27 | // are: |
| michael@0 | 28 | // |
| michael@0 | 29 | // WrapRunnable(o, m, ...) -- wraps a member function m of an object ptr o |
| michael@0 | 30 | // WrapRunnableRet(o, m, ..., r) -- wraps a member function m of an object ptr o |
| michael@0 | 31 | // the function returns something that can |
| michael@0 | 32 | // be assigned to *r |
| michael@0 | 33 | // WrapRunnableNM(f, ...) -- wraps a function f |
| michael@0 | 34 | // WrapRunnableNMRet(f, ..., r) -- wraps a function f that returns something |
| michael@0 | 35 | // that can be assigned to *r |
| michael@0 | 36 | // |
| michael@0 | 37 | // All of these template functions return a Runnable* which can be passed |
| michael@0 | 38 | // to Dispatch(). |
| michael@0 | 39 | #include "runnable_utils_generated.h" |
| michael@0 | 40 | |
| michael@0 | 41 | // Temporary hack. Really we want to have a template which will do this |
| michael@0 | 42 | static inline nsresult RUN_ON_THREAD(nsIEventTarget *thread, nsIRunnable *runnable, uint32_t flags) { |
| michael@0 | 43 | RefPtr<nsIRunnable> runnable_ref(runnable); |
| michael@0 | 44 | if (thread) { |
| michael@0 | 45 | bool on; |
| michael@0 | 46 | nsresult rv; |
| michael@0 | 47 | rv = thread->IsOnCurrentThread(&on); |
| michael@0 | 48 | |
| michael@0 | 49 | // If the target thread has already shut down, we don't want to assert. |
| michael@0 | 50 | if (rv != NS_ERROR_NOT_INITIALIZED) { |
| michael@0 | 51 | MOZ_ASSERT(NS_SUCCEEDED(rv)); |
| michael@0 | 52 | } |
| michael@0 | 53 | |
| michael@0 | 54 | NS_ENSURE_SUCCESS(rv, rv); |
| michael@0 | 55 | if(!on) { |
| michael@0 | 56 | return thread->Dispatch(runnable_ref, flags); |
| michael@0 | 57 | } |
| michael@0 | 58 | } |
| michael@0 | 59 | return runnable_ref->Run(); |
| michael@0 | 60 | } |
| michael@0 | 61 | |
| michael@0 | 62 | static inline nsresult RUN_ON_THREAD(nsIEventTarget *thread, runnable_args_base *runnable, uint32_t flags) { |
| michael@0 | 63 | // Detect attempts to return a value when in async mode, since this |
| michael@0 | 64 | // most likely means someone is trying to assign to a heap variable |
| michael@0 | 65 | // which is now out of scope. |
| michael@0 | 66 | MOZ_ASSERT((!(runnable->returns_value()) || (flags != NS_DISPATCH_NORMAL))); |
| michael@0 | 67 | |
| michael@0 | 68 | return RUN_ON_THREAD(thread, static_cast<nsIRunnable *>(runnable), flags); |
| michael@0 | 69 | } |
| michael@0 | 70 | |
| michael@0 | 71 | #ifdef DEBUG |
| michael@0 | 72 | #define ASSERT_ON_THREAD(t) do { \ |
| michael@0 | 73 | if (t) { \ |
| michael@0 | 74 | bool on; \ |
| michael@0 | 75 | nsresult rv; \ |
| michael@0 | 76 | rv = t->IsOnCurrentThread(&on); \ |
| michael@0 | 77 | MOZ_ASSERT(NS_SUCCEEDED(rv)); \ |
| michael@0 | 78 | MOZ_ASSERT(on); \ |
| michael@0 | 79 | } \ |
| michael@0 | 80 | } while(0) |
| michael@0 | 81 | #else |
| michael@0 | 82 | #define ASSERT_ON_THREAD(t) |
| michael@0 | 83 | #endif |
| michael@0 | 84 | |
| michael@0 | 85 | } /* namespace mozilla */ |
| michael@0 | 86 | |
| michael@0 | 87 | #endif |
