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/* cilk-abi-vla-internal.h -*-C++-*-
*
*************************************************************************
*
* @copyright
* Copyright (C) 2013, Intel Corporation
* All rights reserved.
*
* @copyright
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* @copyright
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
**************************************************************************/
/**
* @file cilk-abi-vla-internal.h
*
* @brief Allocation/deallocation function for use with Variable Length
* Arrays in spawning functions.
*
* These should be the only functions in the Cilk runtime allocating memory
* from the standard C runtime heap. This memory will be provided to user
* code for use in VLAs, when the memory cannot be allocated from the stack.
*
* While these functions are simply passthroughs to malloc and free at the
* moment, once we've got the basics of VLA allocations working we'll make
* them do fancier tricks.
*/
/**
* @brief Allocate memory from the heap for use by a Variable Length Array in
* a spawning function.
*
* @param sf The __cilkrts_stack_frame for the spawning function containing
* the VLA.
* @param full_size The number of bytes to be allocated, including any tags
* needed to identify this as allocated from the heap.
* @param align Any alignment necessary for the allocation.
*/
void *vla_internal_heap_alloc(__cilkrts_stack_frame *sf,
size_t full_size,
uint32_t align);
/**
* @brief Deallocate memory from the heap used by a Variable Length Array in
* a spawning function.
*
* @param t The address of the memory block to be freed.
* @param size The size of the memory block to be freed.
*/
void vla_internal_heap_free(void *t,
size_t size);
/**
* @brief Deallocate memory from the original stack. We'll do this by adding
* full_size to ff->sync_sp. So after the sync, the Variable Length Array
* will no longer be allocated on the stack.
*
* @param sf The __cilkrts_stack_frame for the spawning function that is
* deallocating a VLA.
* @param full_size The size of the VLA, including any alignment and tags.
*/
void vla_free_from_original_stack(__cilkrts_stack_frame *sf,
size_t full_size);
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