tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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platform_thread.cc (2084B)

      1 // Copyright 2018 The Chromium Authors
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "base/threading/platform_thread.h"
      6 #include "base/threading/thread_id_name_manager.h"
      7 
      8 #include "base/task/current_thread.h"
      9 #include "third_party/abseil-cpp/absl/base/attributes.h"
     10 
     11 #if BUILDFLAG(IS_FUCHSIA)
     12 #include "base/fuchsia/scheduler.h"
     13 #endif
     14 
     15 namespace base {
     16 
     17 #if !defined(MOZ_SANDBOX)
     18 namespace {
     19 ABSL_CONST_INIT thread_local ThreadType current_thread_type =
     20    ThreadType::kDefault;
     21 
     22 }  // namespace
     23 
     24 // static
     25 void PlatformThreadBase::SetCurrentThreadType(ThreadType thread_type) {
     26  MessagePumpType message_pump_type = MessagePumpType::DEFAULT;
     27  if (CurrentIOThread::IsSet()) {
     28    message_pump_type = MessagePumpType::IO;
     29  }
     30 #if !BUILDFLAG(IS_NACL)
     31  else if (CurrentUIThread::IsSet()) {
     32    message_pump_type = MessagePumpType::UI;
     33  }
     34 #endif
     35  internal::SetCurrentThreadType(thread_type, message_pump_type);
     36 }
     37 
     38 // static
     39 ThreadType PlatformThreadBase::GetCurrentThreadType() {
     40  return current_thread_type;
     41 }
     42 
     43 // static
     44 absl::optional<TimeDelta> PlatformThreadBase::GetThreadLeewayOverride() {
     45 #if BUILDFLAG(IS_FUCHSIA)
     46  // On Fuchsia, all audio threads run with the CPU scheduling profile that uses
     47  // an interval of |kAudioSchedulingPeriod|. Using the default leeway may lead
     48  // to some tasks posted to audio threads to be executed too late (see
     49  // http://crbug.com/1368858).
     50  if (GetCurrentThreadType() == ThreadType::kRealtimeAudio)
     51    return kAudioSchedulingPeriod;
     52 #endif
     53  return absl::nullopt;
     54 }
     55 #endif
     56 
     57 // static
     58 void PlatformThreadBase::SetNameCommon(const std::string& name) {
     59  ThreadIdNameManager::GetInstance()->SetName(name);
     60 }
     61 
     62 #if !defined(MOZ_SANDBOX)
     63 namespace internal {
     64 
     65 void SetCurrentThreadType(ThreadType thread_type,
     66                          MessagePumpType pump_type_hint) {
     67  CHECK_LE(thread_type, ThreadType::kMaxValue);
     68  SetCurrentThreadTypeImpl(thread_type, pump_type_hint);
     69  current_thread_type = thread_type;
     70 }
     71 
     72 }  // namespace internal
     73 #endif
     74 
     75 }  // namespace base