Remove //net (except for Android test stuff) and sdch

net/base/prioritized_dispatcher.h

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef NET_BASE_PRIORITIZED_DISPATCHER_H_
-#define NET_BASE_PRIORITIZED_DISPATCHER_H_
-
-#include <vector>
-
-#include "net/base/net_export.h"
-#include "net/base/priority_queue.h"
-
-namespace net {
-
-// A priority-based dispatcher of jobs. Dispatch order is by priority (highest
-// first) and then FIFO. The dispatcher enforces limits on the number of running
-// jobs. It never revokes a job once started. The job must call OnJobFinished
-// once it finishes in order to dispatch further jobs.
-//
-// This class is NOT thread-safe which is enforced by the underlying
-// non-thread-safe PriorityQueue. All operations are O(p) time for p priority
-// levels. It is safe to execute any method, including destructor, from within
-// Job::Start.
-//
-class NET_EXPORT_PRIVATE PrioritizedDispatcher {
- public:
-  class Job;
-  typedef PriorityQueue<Job*>::Priority Priority;
-
-  // Describes the limits for the number of jobs started by the dispatcher.
-  // For example, |total_jobs| = 30 and |reserved_slots| = { 0, 5, 10, 5 } allow
-  // for at most 30 running jobs in total. Jobs at priority 0 can't use slots
-  // reserved for higher priorities, so they are limited to 10.
-  // If there are already 24 jobs running, then only 6 more jobs can start. No
-  // jobs at priority 1 or below can start. After one more job starts, no jobs
-  // at priority 2 or below can start, since the remaining 5 slots are reserved
-  // for priority 3 or above.
-  struct NET_EXPORT_PRIVATE Limits {
-    Limits(Priority num_priorities, size_t total_jobs);
-    ~Limits();
-
-    // Total allowed running jobs.
-    size_t total_jobs;
-    // Number of slots reserved for each priority and higher.
-    // Sum of |reserved_slots| must be no greater than |total_jobs|.
-    std::vector<size_t> reserved_slots;
-  };
-
-  // An interface to the job dispatched by PrioritizedDispatcher. The dispatcher
-  // does not own the Job but expects it to live as long as the Job is queued.
-  // Use Cancel to remove Job from queue before it is dispatched. The Job can be
-  // deleted after it is dispatched or canceled, or the dispatcher is destroyed.
-  class Job {
-   public:
-    // Note: PrioritizedDispatcher will never delete a Job.
-    virtual ~Job() {}
-    // Called when the dispatcher starts the job. Once the job finishes, it must
-    // call OnJobFinished.
-    virtual void Start() = 0;
-  };
-
-  // A handle to the enqueued job. The handle becomes invalid when the job is
-  // canceled, updated, or started.
-  typedef PriorityQueue<Job*>::Pointer Handle;
-
-  // Creates a dispatcher enforcing |limits| on number of running jobs.
-  explicit PrioritizedDispatcher(const Limits& limits);
-
-  ~PrioritizedDispatcher();
-
-  size_t num_running_jobs() const { return num_running_jobs_; }
-  size_t num_queued_jobs() const { return queue_.size(); }
-  size_t num_priorities() const { return max_running_jobs_.size(); }
-
-  // Adds |job| with |priority| to the dispatcher. If limits permit, |job| is
-  // started immediately. Returns handle to the job or null-handle if the job is
-  // started. The dispatcher does not own |job|, but |job| must live as long as
-  // it is queued in the dispatcher.
-  Handle Add(Job* job, Priority priority);
-
-  // Just like Add, except that it adds Job at the font of queue of jobs with
-  // priorities of |priority|.
-  Handle AddAtHead(Job* job, Priority priority);
-
-  // Removes the job with |handle| from the queue. Invalidates |handle|.
-  // Note: a Handle is valid iff the job is in the queue, i.e. has not Started.
-  void Cancel(const Handle& handle);
-
-  // Cancels and returns the oldest-lowest-priority Job invalidating any
-  // handles to it. Returns NULL if the queue is empty.
-  Job* EvictOldestLowest();
-
-  // Moves the queued job with |handle| to the end of all values with priority
-  // |priority| and returns the updated handle, or null-handle if it starts the
-  // job. Invalidates |handle|. No-op if priority did not change.
-  Handle ChangePriority(const Handle& handle, Priority priority);
-
-  // Notifies the dispatcher that a running job has finished. Could start a job.
-  void OnJobFinished();
-
-  // Retrieves the Limits that |this| is currently using.  This may not exactly
-  // match the Limits this was created with.  In particular, the number of slots
-  // reserved for the lowest priority will always be 0, even if it was non-zero
-  // in the Limits passed to the constructor or to SetLimits.
-  Limits GetLimits() const;
-
-  // Updates |max_running_jobs_| to match |limits|.  Starts jobs if new limit
-  // allows.  Does not stop jobs if the new limits are lower than the old ones.
-  void SetLimits(const Limits& limits);
-
-  // Set the limits to zero for all priorities, allowing no new jobs to start.
-  void SetLimitsToZero();
-
- private:
-  // Attempts to dispatch the job with |handle| at priority |priority| (might be
-  // different than |handle.priority()|. Returns true if successful. If so
-  // the |handle| becomes invalid.
-  bool MaybeDispatchJob(const Handle& handle, Priority priority);
-
-  // Attempts to dispatch the next highest priority job in the queue. Returns
-  // true if successful, and all handles to that job become invalid.
-  bool MaybeDispatchNextJob();
-
-  // Queue for jobs that need to wait for a spare slot.
-  PriorityQueue<Job*> queue_;
-  // Maximum total number of running jobs allowed after a job at a particular
-  // priority is started. If a greater or equal number of jobs are running, then
-  // another job cannot be started.
-  std::vector<size_t> max_running_jobs_;
-  // Total number of running jobs.
-  size_t num_running_jobs_;
-
-  DISALLOW_COPY_AND_ASSIGN(PrioritizedDispatcher);
-};
-
-}  // namespace net
-
-#endif  // NET_BASE_PRIORITIZED_DISPATCHER_H_