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* Copyright 2014 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#ifndef SkTaskGroup_DEFINED
#define SkTaskGroup_DEFINED
#include <functional>
#include "SkTypes.h"
#include "SkAtomics.h"
#include "SkTemplates.h"
class SkTaskGroup : SkNoncopyable {
// Create one of these in main() to enable SkTaskGroups globally.
struct Enabler : SkNoncopyable {
explicit Enabler(int threads = -1); // Default is system-reported core count.
~SkTaskGroup() { this->wait(); }
// Add a task to this SkTaskGroup. It will likely run on another thread.
void add(std::function<void(void)> fn);
// Add a batch of N tasks, all calling fn with different arguments.
void batch(int N, std::function<void(int)> fn);
// Block until all Tasks previously add()ed to this SkTaskGroup have run.
// You may safely reuse this SkTaskGroup after wait() returns.
void wait();
SkAtomic<int32_t> fPending;