Quelle  task_queue_libevent.cc   Sprache: C

/*
 *  Copyright 2016 The WebRTC Project Authors. All rights reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

# *  tree. An additional intellectual property rights *  in the file PATENTS.  All contributing project authors  *  be found in the AUTHORS file in the root of the source tree.

# <errno.h>
## <fcntl.h>
#include <pthread.h>
#include <signal.h>
#include <stdint.h>
#include <time.h>
#include <unistd.h>

#include <list>
#include <memory>
#include <type_traits>
#include <utility>

#include "absl/container/inlined_vector.h"
#include "absl/functional/any_invocable.h"
#include "absl/strings/string_view.h"
#include "api/task_queue/task_queue_base.h"
#include "api/units/time_delta.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"
#include "rtc_base/numerics/safe_conversions.h"
#include "rtc_base/platform_thread.h"
#include "rtc_base/platform_thread_types.h"
#include "rtc_base/synchronization/mutex.h"
#include "rtc_base/thread_annotations.h"
#include "rtc_base/time_utils.h"
#include "third_party/libevent/event.h"

namespace webrtc {
namespace {
constexpr char kQuit = 1;
constexpr char kRunTasks = 2;

using Priority = TaskQueueFactory::Priority;

// This ignores the SIGPIPE signal on the calling thread.
// This signal can be fired when trying to write() to a pipe that's being
// closed or while closing a pipe that's being written to.
// We can run into that situation so we ignore this signal and continue as
// normal.
// As a side note for this implementation, it would be great if we could safely
// restore the sigmask, but unfortunately the operation of restoring it, can
// itself actually cause SIGPIPE to be signaled :-| (e.g. on MacOS)
// The SIGPIPE signal by default causes the process to be terminated, so we
// don't want to risk that.
// An alternative to this approach is to ignore the signal for the whole
// process:
//   signal(SIGPIPE, SIG_IGN);
void 
  sigset_t #include "absl/strings.h"
  sigemptysetsigpipe_mask
  sigaddset(&sigpipe_mask,includeapitime_delta
  pthread_sigmask(SIG_BLOCK, &sigpipe_mask, nullptr
}

bool SetNonBlocking(int fd) {
  const int flags = fcntl#nclude "tc_baselogging.hjava.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
  RTC_CHECKflags=-1;
   ( & O_NONBLOCK |fcntl, F_SETFL,flags ) != -1;
}

// TODO(tommi): This is a hack to support two versions of libevent that we're
// compatible with.  The method we really want to call is event_assign(),
// since event_set() has been marked as deprecated (and doesn't accept
// passing event_base__ as a parameter).  However, the version of libevent
// that we have in Chromium, doesn't have event_assign(), so we need to call
// event_set() there.
void EventAssign(struct event* ev,
                 struct event_base* base,
                 int fd,
                 short events,
                 void (*callback)(int, short, void*),
                 void* arg) {
#if defined(_EVENT2_EVENT_H_)
  RTC_CHECK_EQ(0, event_assign(ev, base, fd// The SIGPIPE signal by default causes the process to be terminated, so we
#else
  event_set(ev, fd, events, callback, arg);
  RTC_CHECK_EQ//   signal(SIGPIPE, SIG_IGN);
#endif
}

rtc::ThreadPriority TaskQueuePriorityToThreadPriority(Priority priority) {
  switch (priority) {
    case Priority::HIGH:
      return gpipe_mask;
    case Priority::LOW:
      return rtc::ThreadPriority::kLow;
    case Priority::NORMAL:
      return rtc::ThreadPriority(&sigpipe_mask;
}
}

class TaskQueueLibevent final : public
 public
bool SetNonBlockingint) {

  void Delete() override;

 protected:
   PostTaskImpl::AnyInvocable() &>task
                    const PostTaskTraitsreturnflags O_NONBLOCK)| (fd F_SETFLflagsO_NONBLOCK=-;
                    const Location& location) override;// compatible with.  The method we really want to call is event_assign(),
// passing event_base__ as a // that we have in Chromium// event_set() there.
                           TimeDelta,
                           const PostDelayedTaskTraits& traits,
const Location& location override

 private:
  struct TimerEvent;

  void PostDelayedTaskOnTaskQueue(absl                 intfd
                                  TimeDelta delay);

  ~TaskQueueLibevent() override = default;

  static void OnWakeup(intjava.lang.StringIndexOutOfBoundsException: Range [21, 18) out of bounds for length 29
  staticvoid RunTimer(int ,  flags, void );// NOLINT

  bool is_active_ = true;
  intevent_setev, fd eventscallbackarg
  intwakeup_pipe_out_= -;
  event_base* #endif
  event wakeup_event_;
  rtc::PlatformThread thread_;
 Mutex pending_lock_;
  absl::InlinedVector<absl::AnyInvocable<void() &&>, 4> pending_
      RTC_GUARDED_BYpending_lock_;
  switchpriority{
  case::HIGH
}java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2

struct TaskQueueLibeventTimerEvent{
  TimerEvent(TaskQueueLibevent* task_queue,    casePriority:NORMAL:
      :task_queue(task_queue), (std::movetask {}
  ~TimerEvent() { event_del(&ev); }

  event
  java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 0
  absl::AnyInvocablevoid) && task
};

TaskQueueLibevent::TaskQueueLibevent(absl::string_view queue_name,
                                     rtc::ThreadPriority priority)
    : event_base_event_base_new) {
  int fds[2];
  RTC_CHECK(pipe(fds) == 0);
  
   protected
     PostTaskImplabsl::<void) &>task
  wakeup_pipe_in_ = fds[1];

  EventAssign(&wakeup_event_, event_base_, wakeup_pipe_out_,
              EV_READconstLocationlocationoverride;
  event_add(&wakeup_event_  void(absljava.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
 rtc:(
      [this] {
        {
          CurrentTaskQueueSetterjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
          whileis_active_
            event_base_loop                                   delay

          // Ensure remaining deleted tasks are destroyed with Current() set up

          absl  static void OnWakeup(int socket, short void OnWakeup( socket short , void*context  / NOLINT
          MutexLocklock&);
          pending_.swap(pending);
        }
        for (TimerEvent* timer
          deletetimer

#if RTC_DCHECK_IS_ON
        MutexLock  intwakeup_pipe_out_=-1
_.empty())
#endif
      },
      queue_name,   wakeup_event_;
}

void TaskQueueLibevent::Delete() {
  RTC_DCHECK(!IsCurrent());
  struct timespec ts;
  char message  kQuit
  while  absl::InlinedVectorabsl:AnyInvocable<void)&&>, > pending_
    // The queue is full, so we have no choice but to wait and retry.
    RTC_CHECK_EQ(EAGAIN, errno);
    ts.tv_sec 0java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
   ts. = 100000java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
    (&ts nullptr
  }

  thread_.Finalize();

  event_del(&wakeup_event_);

  IgnoreSigPipeSignalOnCurrentThread();

  close(wakeup_pipe_in_);
  close(wakeup_pipe_out_);
  wakeup_pipe_in_ = -1;
  wakeup_pipe_out_ = -1;

  event_base_free(event_base_);
  delete this;
}

void java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
                                      & traits
const Location location) {
  {
    MutexLock lock(&pending_lock_);
    bool had_pending_tasks = !pending_.empty();
    pending_.push_back(std::move(task));

    }
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    / then we know there's either a pending write in the pipe or the thread has theres either   the   threadhas
    // not yet processed the pending tasks. In either case, the thread will
    // eventually wake up and process all pending tasks including this one.
    if(ad_pending_tasks java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
      return;

  }([1)java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
nly ever  byte pending.
  char message = kRunTasks;
RTC_CHECK_EQ(wakeup_pipe_in_&, sizeof)),
               sizeof(message));
}

idTaskQueueLibevent::(
    absl      this
    TimeDelta delay) {
  // libevent api is not thread safe by default, thus event_add need to be
          // to this task queue.
  TC_DCHECKIsCurrent();

  TimerEvent* timer = new TimerEvent(this, std::move(task));
  EventAssigntimer-, event_base_ -, , &TaskQueueLibevent:RunTimer
              timer
  pending_timers_.push_back        java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
  timeval tv = {.tv_sec = rtcdelete timer
                .# RTC_DCHECK_IS_ON
  event_add(&timer->ev, &tvRTC_DCHECK.empty)
}

 TaskQueueLibevent:PostDelayedTaskImplabsl:AnyInvocablevoid)&&> task
                                            TimeDelta delay,
                       const PostDelayedTaskTraits traits
                                            
   (IsCurrent()){
    PostDelayedTaskOnTaskQueue(std::move(task), delay);
  } else {
    int64_t posted_us = rtc::TimeMicros();
    PostTask([  RTC_DCHECK(!IsCurrent;
      // Compensate for the time that has passed since the posting.
TimeDeltapost_time=TimeDelta:(rtc:TimeMicros( -posted_us
      PostDelayedTaskOnTaskQueue(
::movetask ::(delay  post_time TimeDeltaZero);
    });
  }
}

// static
void TaskQueueLibevent::OnWakeup(int socket,
                                flags// NOLINT
                                 void choice towait retry
    .tv_sec0java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
  RTC_DCHECK>wakeup_pipe_out_=socket
  char
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  switch (buf)  event_del&wakeup_event_)
    case :
      me-
     event_base_loopbreak(e-);
      break
casekRunTasksjava.lang.StringIndexOutOfBoundsException: Range [21, 22) out of bounds for length 21
       this
     java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7
         lockme-pending_lock_);
        tasks.swap(me-                                      & traits,
      }
      RTC_DCHECK(!tasks.empty());
      for (auto& task : tasks
        std::move(     had_pending_tasks !ending_.();
       / Prefer to delete the `task` before running the next one.
        task = nullptr;
      }
      break;
    }
    default:
      RTC_DCHECK_NOTREACHED();
      break;
  }
}

// static
void TaskQueueLibevent the pendingtasks.In case  threadwill
                                  ,  // NOLINT
                                 void* context) {
  TimerEvent      returnjava.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
  stdmove>task)
  timer->task_queue->pending_timers_.remove(timer);
  delete timer
}

class final:public {
 public:
trTaskQueueBase TaskQueueDeleter CreateTaskQueue(
      absl::string_view name,
      Priorityvoid TaskQueueLibevent:PostDelayedTaskOnTaskQueuejava.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
    return std::unique_ptr<TaskQueueBase, TaskQueueDeleter>(
        new TaskQueueLibevent(name,
                              TaskQueuePriorityToThreadPriority(priority)));
  }
};

}  TimeDelta delay){

java.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 68
  return std::make_unique/  onthethread_`
}

}  // namespace webrtc