The Tor Browser / file comparison
comparison: media/mtransport/nr_timer.cpp
media/mtransport/nr_timer.cpp
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
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| -1:000000000000 | 0:dbd61bc6fc03 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* vim: set ts=2 et sw=2 tw=80: */ | |
| 3 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this file, | |
| 5 * You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 8 * License, v. 2.0. If a copy of the MPL was not distributed with this file, | |
| 9 * You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 10 | |
| 11 // Original code by: ekr@rtfm.com | |
| 12 | |
| 13 // Implementation of the NR timer interface | |
| 14 | |
| 15 // Some code here copied from nrappkit. The license was. | |
| 16 | |
| 17 /** | |
| 18 Copyright (C) 2004, Network Resonance, Inc. | |
| 19 Copyright (C) 2006, Network Resonance, Inc. | |
| 20 All Rights Reserved | |
| 21 | |
| 22 Redistribution and use in source and binary forms, with or without | |
| 23 modification, are permitted provided that the following conditions | |
| 24 are met: | |
| 25 | |
| 26 1. Redistributions of source code must retain the above copyright | |
| 27 notice, this list of conditions and the following disclaimer. | |
| 28 2. Redistributions in binary form must reproduce the above copyright | |
| 29 notice, this list of conditions and the following disclaimer in the | |
| 30 documentation and/or other materials provided with the distribution. | |
| 31 3. Neither the name of Network Resonance, Inc. nor the name of any | |
| 32 contributors to this software may be used to endorse or promote | |
| 33 products derived from this software without specific prior written | |
| 34 permission. | |
| 35 | |
| 36 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' | |
| 37 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 38 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 39 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
| 40 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 41 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 42 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 43 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 44 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 45 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 46 POSSIBILITY OF SUCH DAMAGE. | |
| 47 | |
| 48 | |
| 49 ekr@rtfm.com Sun Feb 22 19:35:24 2004 | |
| 50 */ | |
| 51 | |
| 52 #include <string> | |
| 53 | |
| 54 #include "nsCOMPtr.h" | |
| 55 #include "nsComponentManagerUtils.h" | |
| 56 #include "nsServiceManagerUtils.h" | |
| 57 #include "nsIEventTarget.h" | |
| 58 #include "nsITimer.h" | |
| 59 #include "nsNetCID.h" | |
| 60 #include "runnable_utils.h" | |
| 61 | |
| 62 extern "C" { | |
| 63 #include "nr_api.h" | |
| 64 #include "async_timer.h" | |
| 65 } | |
| 66 | |
| 67 | |
| 68 namespace mozilla { | |
| 69 | |
| 70 class nrappkitTimerCallback : public nsITimerCallback | |
| 71 { | |
| 72 public: | |
| 73 // We're going to release ourself in the callback, so we need to be threadsafe | |
| 74 NS_DECL_THREADSAFE_ISUPPORTS | |
| 75 NS_DECL_NSITIMERCALLBACK | |
| 76 | |
| 77 nrappkitTimerCallback(NR_async_cb cb, void *cb_arg, | |
| 78 const char *function, int line) | |
| 79 : cb_(cb), cb_arg_(cb_arg), function_(function), line_(line) { | |
| 80 } | |
| 81 | |
| 82 private: | |
| 83 virtual ~nrappkitTimerCallback() {} | |
| 84 | |
| 85 protected: | |
| 86 /* additional members */ | |
| 87 NR_async_cb cb_; | |
| 88 void *cb_arg_; | |
| 89 std::string function_; | |
| 90 int line_; | |
| 91 }; | |
| 92 | |
| 93 NS_IMPL_ISUPPORTS(nrappkitTimerCallback, nsITimerCallback) | |
| 94 | |
| 95 NS_IMETHODIMP nrappkitTimerCallback::Notify(nsITimer *timer) { | |
| 96 r_log(LOG_GENERIC, LOG_DEBUG, "Timer callback fired (set in %s:%d)", | |
| 97 function_.c_str(), line_); | |
| 98 | |
| 99 cb_(0, 0, cb_arg_); | |
| 100 | |
| 101 // Allow the timer to go away. | |
| 102 timer->Release(); | |
| 103 return NS_OK; | |
| 104 } | |
| 105 } // close namespace | |
| 106 | |
| 107 | |
| 108 using namespace mozilla; | |
| 109 | |
| 110 // These timers must only be used from the STS thread. | |
| 111 // This function is a helper that enforces that. | |
| 112 static void CheckSTSThread() { | |
| 113 nsresult rv; | |
| 114 | |
| 115 nsCOMPtr<nsIEventTarget> sts_thread; | |
| 116 | |
| 117 sts_thread = do_GetService(NS_SOCKETTRANSPORTSERVICE_CONTRACTID, &rv); | |
| 118 | |
| 119 MOZ_ASSERT(NS_SUCCEEDED(rv)); | |
| 120 ASSERT_ON_THREAD(sts_thread); | |
| 121 } | |
| 122 | |
| 123 int NR_async_timer_set(int timeout, NR_async_cb cb, void *arg, char *func, | |
| 124 int l, void **handle) { | |
| 125 nsresult rv; | |
| 126 CheckSTSThread(); | |
| 127 | |
| 128 nsCOMPtr<nsITimer> timer = do_CreateInstance(NS_TIMER_CONTRACTID, &rv); | |
| 129 if (NS_FAILED(rv)) { | |
| 130 return(R_FAILED); | |
| 131 } | |
| 132 | |
| 133 rv = timer->InitWithCallback(new nrappkitTimerCallback(cb, arg, func, l), | |
| 134 timeout, nsITimer::TYPE_ONE_SHOT); | |
| 135 if (NS_FAILED(rv)) { | |
| 136 return R_FAILED; | |
| 137 } | |
| 138 | |
| 139 // We need an AddRef here to keep the timer alive, per the spec. | |
| 140 timer->AddRef(); | |
| 141 | |
| 142 if (handle) | |
| 143 *handle = timer.get(); | |
| 144 // Bug 818806: if we have no handle to the timer, we have no way to avoid | |
| 145 // it leaking (though not the callback object) if it never fires (or if | |
| 146 // we exit before it fires). | |
| 147 | |
| 148 return 0; | |
| 149 } | |
| 150 | |
| 151 int NR_async_schedule(NR_async_cb cb, void *arg, char *func, int l) { | |
| 152 // No need to check the thread because we check it next in the | |
| 153 // timer set. | |
| 154 return NR_async_timer_set(0, cb, arg, func, l, nullptr); | |
| 155 } | |
| 156 | |
| 157 int NR_async_timer_cancel(void *handle) { | |
| 158 // Check for the handle being nonzero because sometimes we get | |
| 159 // no-op cancels that aren't on the STS thread. This can be | |
| 160 // non-racy as long as the upper-level code is careful. | |
| 161 if (!handle) | |
| 162 return 0; | |
| 163 | |
| 164 CheckSTSThread(); | |
| 165 | |
| 166 nsITimer *timer = static_cast<nsITimer *>(handle); | |
| 167 | |
| 168 timer->Cancel(); | |
| 169 // Allow the timer to go away. | |
| 170 timer->Release(); | |
| 171 | |
| 172 return 0; | |
| 173 } | |
| 174 |
