lambda_blocks.h

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/*
* Copyright (c) 2008-2009 Apple Inc. All rights reserved.
* Copyright (c) 2011 MLBA. All rights reserved.
*
* @MLBA_OPEN_LICENSE_HEADER_START@
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* 
*     http://www.apache.org/licenses/LICENSE-2.0
* 
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* @MLBA_OPEN_LICENSE_HEADER_END@
*/


/* When building on 10.6 with gcc 4.5.1 we can bypass
    Apple's lambda functions implementation in C++ as we have lambdas.
       This prevents a lot of errors from occuring
       */

#ifndef XDISPATCH_BLOCKS_H_
#define XDISPATCH_BLOCKS_H_

#ifndef __XDISPATCH_INDIRECT__
#error "Please #include <xdispatch/dispatch.h> instead of this file directly."
#endif

// clang 2.0, gcc 4.3 from mac os 10.6
#ifdef __BLOCKS__
# include <Block.h>
# include <stddef.h>
# define XDISPATCH_BLOCK ^
# ifndef XDISPATCH_NO_KEYWORDS
#  define $ ^
# endif
# define XDISPATCH_BLOCK_PERSIST(A) Block_copy(A)
# define XDISPATCH_BLOCK_COPY(A) Block_copy(A)
# define XDISPATCH_BLOCK_DELETE(A) Block_release(A)
# define XDISPATCH_BLOCK_EXEC(A) (A)
  //typedef void (^dispatch_block_t)(void);
 typedef void (^dispatch_iteration_block_t)(size_t);
 typedef dispatch_block_t dispatch_block_store;
 typedef dispatch_iteration_block_t dispatch_iteration_block_store;
# define XDISPATCH_HAS_BLOCKS
# if defined(__cplusplus) && !defined(__clang__)
#  warning "Sadly blocks are currently broken in C++ on this platform, we recommend using gcc 4.5.1 or clang 2.0 instead"
# endif

// visual studio 2010
#elif _MSC_VER >= 1600

# include <functional>
# define XDISPATCH_BLOCK [=]
# ifndef XDISPATCH_NO_KEYWORDS
#  define $ [=]
# endif
# define XDISPATCH_BLOCK_PERSIST(A) (A)
# define XDISPATCH_BLOCK_COPY(A) (A)
# define XDISPATCH_BLOCK_DELETE(A) {}
# define XDISPATCH_BLOCK_EXEC(A) (A)
 typedef const std::tr1::function< void (void) >& dispatch_block_t;
 typedef const std::tr1::function< void (size_t) >& dispatch_iteration_block_t;
 typedef std::tr1::function< void (void) > dispatch_block_store;
 typedef std::tr1::function< void (size_t) > dispatch_iteration_block_store;
# define XDISPATCH_HAS_BLOCKS

// gcc 4.5 with c++0x enabled
#elif defined __GXX_EXPERIMENTAL_CXX0X__

# include <tr1/functional>
# define XDISPATCH_BLOCK [=]
# ifndef XDISPATCH_NO_KEYWORDS
#  define $ [=]
# endif
# define XDISPATCH_BLOCK_PERSIST(A) (A)
# define XDISPATCH_BLOCK_COPY(A) (A)
# define XDISPATCH_BLOCK_DELETE(A) {}
# define XDISPATCH_BLOCK_EXEC(A) (A)
 typedef const std::tr1::function< void (void) >& dispatch_block_t;
 typedef const std::tr1::function< void (size_t) >& dispatch_iteration_block_t;
 typedef std::tr1::function< void (void) > dispatch_block_store;
 typedef std::tr1::function< void (size_t) > dispatch_iteration_block_store;
# define XDISPATCH_HAS_BLOCKS

#else

# define XDISPATCH_BLOCK "No Block support!"

#endif

#if defined(XDISPATCH_HAS_BLOCKS) && !defined(__BLOCKS__)

#ifndef XDISPATCH_EXPORT
# ifdef _WIN32
#  ifdef XDISPATCH_MAKEDLL
#   define XDISPATCH_EXPORT __declspec(dllexport)
#  else
#   define XDISPATCH_EXPORT __declspec(dllimport)
#  endif
# else
#  define XDISPATCH_EXPORT __attribute__((visibility("default")))
# endif
#endif

XDISPATCH_EXPORT void dispatch_async(dispatch_queue_t queue, dispatch_block_t function);

XDISPATCH_EXPORT void dispatch_after(dispatch_time_t when, dispatch_queue_t queue, dispatch_block_t function);

XDISPATCH_EXPORT void dispatch_sync(dispatch_queue_t queue, dispatch_block_t function);

XDISPATCH_EXPORT void dispatch_apply(size_t iterations, dispatch_queue_t queue, dispatch_iteration_block_t function);

XDISPATCH_EXPORT void dispatch_group_async(dispatch_group_t group, dispatch_queue_t queue, dispatch_block_t function);

XDISPATCH_EXPORT void dispatch_group_notify(dispatch_group_t group, dispatch_queue_t queue, dispatch_block_t block);

XDISPATCH_EXPORT void dispatch_source_set_event_handler(dispatch_source_t source, dispatch_block_t handler);

XDISPATCH_EXPORT void dispatch_source_set_cancel_handler(dispatch_source_t source, dispatch_block_t cancel_handler);

XDISPATCH_EXPORT void dispatch_once(dispatch_once_t *predicate, dispatch_block_t block);

#endif

#endif /* XDISPATCH_BLOCKS_H_ */