| /* |
| * 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 "SkTypes.h" |
| |
| struct SkRunnable; |
| |
| class SkTaskGroup : SkNoncopyable { |
| public: |
| // Create one of these in main() to enable SkTaskGroups globally. |
| struct Enabler : SkNoncopyable { |
| explicit Enabler(int threads = -1); // Default is system-reported core count. |
| ~Enabler(); |
| }; |
| |
| SkTaskGroup(); |
| ~SkTaskGroup() { this->wait(); } |
| |
| // Add a task to this SkTaskGroup. It will likely run on another thread. |
| // Neither add() method takes owership of any of its parameters. |
| void add(SkRunnable*); |
| |
| template <typename T> |
| void add(void (*fn)(T*), T* arg) { this->add((void_fn)fn, (void*)arg); } |
| |
| // Add a batch of N tasks, all calling fn with different arguments. |
| // Equivalent to a loop over add(fn, arg), but with perhaps less synchronization overhead. |
| template <typename T> |
| void batch(void (*fn)(T*), T* args, int N) { this->batch((void_fn)fn, args, N, sizeof(T)); } |
| |
| // Block until all Tasks previously add()ed to this SkTaskGroup have run. |
| // You may safely reuse this SkTaskGroup after wait() returns. |
| void wait(); |
| |
| private: |
| typedef void(*void_fn)(void*); |
| |
| void add (void_fn, void* arg); |
| void batch(void_fn, void* args, int N, size_t stride); |
| |
| /*atomic*/ int32_t fPending; |
| }; |
| |
| #endif//SkTaskGroup_DEFINED |