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| 1 /* | 1 /* |
| 2 * Copyright (C) 2009-2010 Google Inc. All rights reserved. | 2 * Copyright (C) 2009-2010 Google Inc. All rights reserved. |
| 3 * | 3 * |
| 4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
| 5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
| 6 * met: | 6 * met: |
| 7 * | 7 * |
| 8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
| 9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
| 10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
| (...skipping 15 matching lines...) Expand all Loading... |
| 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 */ | 29 */ |
| 30 | 30 |
| 31 #ifndef CrossThreadTask_h | 31 #ifndef CrossThreadTask_h |
| 32 #define CrossThreadTask_h | 32 #define CrossThreadTask_h |
| 33 | 33 |
| 34 #include "core/dom/ExecutionContext.h" | 34 #include "core/dom/ExecutionContext.h" |
| 35 #include "core/dom/ExecutionContextTask.h" | 35 #include "core/dom/ExecutionContextTask.h" |
| 36 #include "platform/ThreadSafeFunctional.h" | 36 #include "platform/CrossThreadFunctional.h" |
| 37 #include <type_traits> | 37 #include <type_traits> |
| 38 | 38 |
| 39 namespace blink { | 39 namespace blink { |
| 40 | 40 |
| 41 // createCrossThreadTask(...) is ExecutionContextTask version of | 41 // createCrossThreadTask(...) is ExecutionContextTask version of |
| 42 // threadSafeBind(). | 42 // crossThreadBind(). |
| 43 // Using WTF::bind() directly is not thread-safe due to temporary objects, see | 43 // Using WTF::bind() directly is not thread-safe due to temporary objects, see |
| 44 // https://crbug.com/390851 for details. | 44 // https://crbug.com/390851 for details. |
| 45 // | 45 // |
| 46 // Example: | 46 // Example: |
| 47 // void func1(int, const String&); | 47 // void func1(int, const String&); |
| 48 // createCrossThreadTask(func1, 42, str); | 48 // createCrossThreadTask(func1, 42, str); |
| 49 // func1(42, str2) will be called, where |str2| is a deep copy of | 49 // func1(42, str2) will be called, where |str2| is a deep copy of |
| 50 // |str| (created by str.isolatedCopy()). | 50 // |str| (created by str.isolatedCopy()). |
| 51 // | 51 // |
| 52 // Don't (if you pass the task across threads): | 52 // Don't (if you pass the task across threads): |
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| 68 // (|ptr| can also be WeakPtr<C> or other pointer-like types) | 68 // (|ptr| can also be WeakPtr<C> or other pointer-like types) |
| 69 // and then the following are called on the target thread: | 69 // and then the following are called on the target thread: |
| 70 // functionEC(p1, ..., pn, context); | 70 // functionEC(p1, ..., pn, context); |
| 71 // ptr->memberEC(p1, ..., pn, context); | 71 // ptr->memberEC(p1, ..., pn, context); |
| 72 // function(p1, ..., pn); | 72 // function(p1, ..., pn); |
| 73 // ptr->member(p1, ..., pn); | 73 // ptr->member(p1, ..., pn); |
| 74 // | 74 // |
| 75 // ExecutionContext: | 75 // ExecutionContext: |
| 76 // |context| is supplied by the target thread. | 76 // |context| is supplied by the target thread. |
| 77 // | 77 // |
| 78 // Deep copies by threadSafeBind(): | 78 // Deep copies by crossThreadBind(): |
| 79 // |ptr|, |p1|, ..., |pn| are processed by threadSafeBind() and thus | 79 // |ptr|, |p1|, ..., |pn| are processed by crossThreadBind() and thus |
| 80 // CrossThreadCopier. | 80 // CrossThreadCopier. |
| 81 // You don't have to call manually e.g. isolatedCopy(). | 81 // You don't have to call manually e.g. isolatedCopy(). |
| 82 // To pass things that cannot be copied by CrossThreadCopier | 82 // To pass things that cannot be copied by CrossThreadCopier |
| 83 // (e.g. pointers), use crossThreadUnretained() explicitly. | 83 // (e.g. pointers), use crossThreadUnretained() explicitly. |
| 84 | 84 |
| 85 template<typename FunctionType, typename... P> | 85 template<typename FunctionType, typename... P> |
| 86 std::unique_ptr<ExecutionContextTask> createCrossThreadTask(FunctionType functio
n, P&&... parameters) | 86 std::unique_ptr<ExecutionContextTask> createCrossThreadTask(FunctionType functio
n, P&&... parameters) |
| 87 { | 87 { |
| 88 return internal::createCallClosureTask(threadSafeBind(function, std::forward
<P>(parameters)...)); | 88 return internal::createCallClosureTask(crossThreadBind(function, std::forwar
d<P>(parameters)...)); |
| 89 } | 89 } |
| 90 | 90 |
| 91 } // namespace blink | 91 } // namespace blink |
| 92 | 92 |
| 93 #endif // CrossThreadTask_h | 93 #endif // CrossThreadTask_h |
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