ipc/unixfd/UnixFdWatcher.cpp@ca08bd8f51b2 (annotated)
ipc/unixfd/UnixFdWatcher.cpp
Wed, 31 Dec 2014 06:55:46 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:55:46 +0100
- changeset 1
- ca08bd8f51b2
- permissions
- -rw-r--r--
Added tag TORBROWSER_REPLICA for changeset 6474c204b198
| michael@0 | 1 | /* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */ |
| 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 |
| michael@0 | 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | #include <fcntl.h> |
| michael@0 | 8 | #include "UnixFdWatcher.h" |
| michael@0 | 9 | |
| michael@0 | 10 | #ifdef CHROMIUM_LOG |
| michael@0 | 11 | #undef CHROMIUM_LOG |
| michael@0 | 12 | #endif |
| michael@0 | 13 | |
| michael@0 | 14 | #if defined(MOZ_WIDGET_GONK) |
| michael@0 | 15 | #include <android/log.h> |
| michael@0 | 16 | #define CHROMIUM_LOG(args...) __android_log_print(ANDROID_LOG_INFO, "I/O", args); |
| michael@0 | 17 | #else |
| michael@0 | 18 | #include <stdio.h> |
| michael@0 | 19 | #define IODEBUG true |
| michael@0 | 20 | #define CHROMIUM_LOG(args...) if (IODEBUG) printf(args); |
| michael@0 | 21 | #endif |
| michael@0 | 22 | |
| michael@0 | 23 | namespace mozilla { |
| michael@0 | 24 | namespace ipc { |
| michael@0 | 25 | |
| michael@0 | 26 | UnixFdWatcher::~UnixFdWatcher() |
| michael@0 | 27 | { |
| michael@0 | 28 | NS_WARN_IF(IsOpen()); /* mFd should have been closed already */ |
| michael@0 | 29 | } |
| michael@0 | 30 | |
| michael@0 | 31 | void |
| michael@0 | 32 | UnixFdWatcher::Close() |
| michael@0 | 33 | { |
| michael@0 | 34 | MOZ_ASSERT(MessageLoopForIO::current() == mIOLoop); |
| michael@0 | 35 | |
| michael@0 | 36 | if (NS_WARN_IF(!IsOpen())) { |
| michael@0 | 37 | /* mFd should have been open */ |
| michael@0 | 38 | return; |
| michael@0 | 39 | } |
| michael@0 | 40 | OnClose(); |
| michael@0 | 41 | RemoveWatchers(READ_WATCHER|WRITE_WATCHER); |
| michael@0 | 42 | mFd.dispose(); |
| michael@0 | 43 | } |
| michael@0 | 44 | |
| michael@0 | 45 | void |
| michael@0 | 46 | UnixFdWatcher::AddWatchers(unsigned long aWatchers, bool aPersistent) |
| michael@0 | 47 | { |
| michael@0 | 48 | MOZ_ASSERT(MessageLoopForIO::current() == mIOLoop); |
| michael@0 | 49 | MOZ_ASSERT(IsOpen()); |
| michael@0 | 50 | |
| michael@0 | 51 | // Before we add a watcher, we need to remove it! Removing is always |
| michael@0 | 52 | // safe, but adding the same watcher twice can lead to endless loops |
| michael@0 | 53 | // inside libevent. |
| michael@0 | 54 | RemoveWatchers(aWatchers); |
| michael@0 | 55 | |
| michael@0 | 56 | if (aWatchers & READ_WATCHER) { |
| michael@0 | 57 | MessageLoopForIO::current()->WatchFileDescriptor( |
| michael@0 | 58 | mFd, |
| michael@0 | 59 | aPersistent, |
| michael@0 | 60 | MessageLoopForIO::WATCH_READ, |
| michael@0 | 61 | &mReadWatcher, |
| michael@0 | 62 | this); |
| michael@0 | 63 | } |
| michael@0 | 64 | if (aWatchers & WRITE_WATCHER) { |
| michael@0 | 65 | MessageLoopForIO::current()->WatchFileDescriptor( |
| michael@0 | 66 | mFd, |
| michael@0 | 67 | aPersistent, |
| michael@0 | 68 | MessageLoopForIO::WATCH_WRITE, |
| michael@0 | 69 | &mWriteWatcher, |
| michael@0 | 70 | this); |
| michael@0 | 71 | } |
| michael@0 | 72 | } |
| michael@0 | 73 | |
| michael@0 | 74 | void |
| michael@0 | 75 | UnixFdWatcher::RemoveWatchers(unsigned long aWatchers) |
| michael@0 | 76 | { |
| michael@0 | 77 | MOZ_ASSERT(MessageLoopForIO::current() == mIOLoop); |
| michael@0 | 78 | MOZ_ASSERT(IsOpen()); |
| michael@0 | 79 | |
| michael@0 | 80 | if (aWatchers & READ_WATCHER) { |
| michael@0 | 81 | mReadWatcher.StopWatchingFileDescriptor(); |
| michael@0 | 82 | } |
| michael@0 | 83 | if (aWatchers & WRITE_WATCHER) { |
| michael@0 | 84 | mWriteWatcher.StopWatchingFileDescriptor(); |
| michael@0 | 85 | } |
| michael@0 | 86 | } |
| michael@0 | 87 | |
| michael@0 | 88 | void |
| michael@0 | 89 | UnixFdWatcher::OnError(const char* aFunction, int aErrno) |
| michael@0 | 90 | { |
| michael@0 | 91 | MOZ_ASSERT(MessageLoopForIO::current() == mIOLoop); |
| michael@0 | 92 | |
| michael@0 | 93 | CHROMIUM_LOG("%s failed with error %d (%s)", |
| michael@0 | 94 | aFunction, aErrno, strerror(aErrno)); |
| michael@0 | 95 | } |
| michael@0 | 96 | |
| michael@0 | 97 | UnixFdWatcher::UnixFdWatcher(MessageLoop* aIOLoop) |
| michael@0 | 98 | : mIOLoop(aIOLoop) |
| michael@0 | 99 | { |
| michael@0 | 100 | MOZ_ASSERT(mIOLoop); |
| michael@0 | 101 | } |
| michael@0 | 102 | |
| michael@0 | 103 | UnixFdWatcher::UnixFdWatcher(MessageLoop* aIOLoop, int aFd) |
| michael@0 | 104 | : mIOLoop(aIOLoop) |
| michael@0 | 105 | , mFd(aFd) |
| michael@0 | 106 | { |
| michael@0 | 107 | MOZ_ASSERT(mIOLoop); |
| michael@0 | 108 | } |
| michael@0 | 109 | |
| michael@0 | 110 | void |
| michael@0 | 111 | UnixFdWatcher::SetFd(int aFd) |
| michael@0 | 112 | { |
| michael@0 | 113 | MOZ_ASSERT(MessageLoopForIO::current() == mIOLoop); |
| michael@0 | 114 | MOZ_ASSERT(!IsOpen()); |
| michael@0 | 115 | MOZ_ASSERT(FdIsNonBlocking(aFd)); |
| michael@0 | 116 | |
| michael@0 | 117 | mFd = aFd; |
| michael@0 | 118 | } |
| michael@0 | 119 | |
| michael@0 | 120 | bool |
| michael@0 | 121 | UnixFdWatcher::FdIsNonBlocking(int aFd) |
| michael@0 | 122 | { |
| michael@0 | 123 | int flags = TEMP_FAILURE_RETRY(fcntl(aFd, F_GETFL)); |
| michael@0 | 124 | return (flags > 0) && (flags & O_NONBLOCK); |
| michael@0 | 125 | } |
| michael@0 | 126 | |
| michael@0 | 127 | } |
| michael@0 | 128 | } |
