384b90af5c
Refactoring to refamiliarize myself with SkTaskGroup and SkThreadPool. This adds an SkExecutor interface to describe how we use SkThreadPool, with a global setter and getter for a default instance. Then I rewrote SkTaskGroup to work with any executor, the global default by default. I also think I've made the SkTaskGroup::wait() borrow logic clearer with the addition of SkSemaphore::try_wait(). This lets me keep the semaphore count and actual count of work in perfect sync. Change-Id: I6bbdfaeb0e2c3a43daff6192d34bc4a3f7210178 Reviewed-on: https://skia-review.googlesource.com/8836 Reviewed-by: Mike Reed <reed@google.com> Reviewed-by: Herb Derby <herb@google.com> Commit-Queue: Mike Klein <mtklein@chromium.org>
33 lines
922 B
C++
33 lines
922 B
C++
/*
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* Copyright 2017 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkExecutor_DEFINED
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#define SkExecutor_DEFINED
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#include <functional>
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#include <memory>
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class SkExecutor {
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public:
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virtual ~SkExecutor();
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// Create a thread pool SkExecutor with a fixed thread count, by default the number of cores.
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static std::unique_ptr<SkExecutor> MakeThreadPool(int threads = 0);
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// There is always a default SkExecutor available by calling SkExecutor::GetDefault().
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static SkExecutor& GetDefault();
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static void SetDefault(SkExecutor*); // Does not take ownership. Not thread safe.
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// Add work to execute.
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virtual void add(std::function<void(void)>) = 0;
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// If it makes sense for this executor, use this thread to execute work for a little while.
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virtual void borrow() {}
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};
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#endif//SkExecutor_DEFINED
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