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///////////////////////////////////////////////////////////////////////////////
// Copyright (c) Electronic Arts Inc. All rights reserved.
///////////////////////////////////////////////////////////////////////////////
#include <EASTL/internal/fixed_pool.h>
#include <EASTL/fixed_allocator.h>
namespace eastl
{
EASTL_API void fixed_pool_base::init(void* pMemory, size_t memorySize, size_t nodeSize,
size_t alignment, size_t /*alignmentOffset*/)
{
// To do: Support alignmentOffset.
#if EASTL_FIXED_SIZE_TRACKING_ENABLED
mnCurrentSize = 0;
mnPeakSize = 0;
#endif
if(pMemory)
{
// Assert that alignment is a power of 2 value (e.g. 1, 2, 4, 8, 16, etc.)
EASTL_ASSERT((alignment & (alignment - 1)) == 0);
// Make sure alignment is a valid value.
if(alignment < 1)
alignment = 1;
mpNext = (Link*)(((uintptr_t)pMemory + (alignment - 1)) & ~(alignment - 1));
memorySize -= (uintptr_t)mpNext - (uintptr_t)pMemory;
pMemory = mpNext;
// The node size must be at least as big as a Link, which itself is sizeof(void*).
if(nodeSize < sizeof(Link))
nodeSize = ((sizeof(Link) + (alignment - 1))) & ~(alignment - 1);
// If the user passed in a memory size that wasn't a multiple of the node size,
// we need to chop down the memory size so that the last node is not a whole node.
memorySize = (memorySize / nodeSize) * nodeSize;
mpCapacity = (Link*)((uintptr_t)pMemory + memorySize);
mpHead = NULL;
mnNodeSize = nodeSize;
}
}
} // namespace eastl
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