15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef BASE_MAC_BIND_OBJC_BLOCK_H_ 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define BASE_MAC_BIND_OBJC_BLOCK_H_ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 82a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include <Block.h> 92a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 102a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "base/bind.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/callback_forward.h" 122a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "base/mac/scoped_block.h" 132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// BindBlock builds a callback from an Objective-C block. Example usages: 152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// 162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Closure closure = BindBlock(^{DoSomething();}); 175d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// 182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Callback<int(void)> callback = BindBlock(^{return 42;}); 195d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// 205d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// Callback<void(const std::string&, const std::string&)> callback = 215d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// BindBlock(^(const std::string& arg0, const std::string& arg1) { 225d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// ... 235d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// }); 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace base { 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)namespace internal { 282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 29c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// Helper functions to run the block contained in the parameter. 30c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)template<typename R> 31c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)R RunBlock(base::mac::ScopedBlock<R(^)()> block) { 32c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) R(^extracted_block)() = block.get(); 332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return extracted_block(); 342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 352a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 36c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)template<typename R, typename A1> 37c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)R RunBlock(base::mac::ScopedBlock<R(^)(A1)> block, A1 a) { 38c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) R(^extracted_block)(A1) = block.get(); 39c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) return extracted_block(a); 40c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)} 41c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 425d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)template<typename R, typename A1, typename A2> 435d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)R RunBlock(base::mac::ScopedBlock<R(^)(A1, A2)> block, A1 a, A2 b) { 445d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) R(^extracted_block)(A1, A2) = block.get(); 455d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) return extracted_block(a, b); 465d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)} 475d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} // namespace internal 492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 50c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// Construct a callback with no argument from an objective-C block. 51c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)template<typename R> 52c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)base::Callback<R(void)> BindBlock(R(^block)()) { 53c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) return base::Bind(&base::internal::RunBlock<R>, 54c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) base::mac::ScopedBlock<R(^)()>(Block_copy(block))); 55c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)} 56c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) 57c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// Construct a callback with one argument from an objective-C block. 58c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)template<typename R, typename A1> 59c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)base::Callback<R(A1)> BindBlock(R(^block)(A1)) { 60c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) return base::Bind(&base::internal::RunBlock<R, A1>, 61c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) base::mac::ScopedBlock<R(^)(A1)>(Block_copy(block))); 622a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 645d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// Construct a callback with two arguments from an objective-C block. 655d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)template<typename R, typename A1, typename A2> 665d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)base::Callback<R(A1, A2)> BindBlock(R(^block)(A1, A2)) { 675d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) return base::Bind(&base::internal::RunBlock<R, A1, A2>, 685d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) base::mac::ScopedBlock<R(^)(A1, A2)>(Block_copy(block))); 695d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)} 705d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace base 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // BASE_MAC_BIND_OBJC_BLOCK_H_ 74