public static UnsafeRingBuffer *Allocate(int capacity, int stride, bool overwrite)
{
Assert.Check(capacity > 0);
Assert.Check(stride > 0);
// fixedSize means we are allocating the memory for the collection header and the items in it as one block
var alignment = AllocHelper.GetAlignmentForArrayElement(stride);
// align header size to the elements alignment
var sizeOfHeader = AllocHelper.RoundUpToAlignment(sizeof(UnsafeRingBuffer), alignment);
var sizeOfBuffer = stride * capacity;
// allocate memory for list and array with the correct alignment
var ptr = AllocHelper.MallocAndClear(sizeOfHeader + sizeOfBuffer, alignment);
// grab header ptr
var ring = (UnsafeRingBuffer *)ptr;
// initialize fixed buffer from same block of memory as the collection, offset by sizeOfHeader
UnsafeBuffer.InitFixed(&ring->_items, (byte *)ptr + sizeOfHeader, capacity, stride);
// initialize count to 0
ring->_count = 0;
ring->_overwrite = overwrite;
return(ring);
}
public static UnsafeHashSet *Allocate(int capacity, int valStride, bool fixedSize = false)
{
var entryStride = sizeof(UnsafeHashCollection.Entry);
// round capacity up to next prime
capacity = UnsafeHashCollection.GetNextPrime(capacity);
// this has to be true
Assert.Check(entryStride == 16);
var valAlignment = Native.GetAlignment(valStride);
// the alignment for entry/key/val, we can't have less than ENTRY_ALIGNMENT
// bytes alignment because entries are 16 bytes with 1 x pointer + 2 x 4 byte integers
var alignment = Math.Max(UnsafeHashCollection.Entry.ALIGNMENT, valAlignment);
// calculate strides for all elements
valStride = Native.RoundToAlignment(valStride, alignment);
entryStride = Native.RoundToAlignment(sizeof(UnsafeHashCollection.Entry), alignment);
// dictionary ptr
UnsafeHashSet *set;
if (fixedSize)
{
var sizeOfHeader = Native.RoundToAlignment(sizeof(UnsafeHashSet), alignment);
var sizeOfBucketsBuffer = Native.RoundToAlignment(sizeof(UnsafeHashCollection.Entry * *) * capacity, alignment);
var sizeofEntriesBuffer = (entryStride + valStride) * capacity;
// allocate memory
var ptr = Native.MallocAndClear(sizeOfHeader + sizeOfBucketsBuffer + sizeofEntriesBuffer, alignment);
// start of memory is the dict itself
set = (UnsafeHashSet *)ptr;
// buckets are offset by header size
set->_collection.Buckets = (UnsafeHashCollection.Entry * *)((byte *)ptr + sizeOfHeader);
// initialize fixed buffer
UnsafeBuffer.InitFixed(&set->_collection.Entries, (byte *)ptr + (sizeOfHeader + sizeOfBucketsBuffer), capacity, entryStride + valStride);
}
else
{
// allocate dict, buckets and entries buffer separately
set = Native.MallocAndClear <UnsafeHashSet>();
set->_collection.Buckets = (UnsafeHashCollection.Entry * *)Native.MallocAndClear(sizeof(UnsafeHashCollection.Entry * *) * capacity, sizeof(UnsafeHashCollection.Entry * *));
// init dynamic buffer
UnsafeBuffer.InitDynamic(&set->_collection.Entries, capacity, entryStride + valStride);
}
set->_collection.FreeCount = 0;
set->_collection.UsedCount = 0;
set->_collection.KeyOffset = entryStride;
return(set);
}
public static UnsafeOrderedSet *Allocate(int capacity, int valStride, bool fixedSize = false)
{
var entryStride = sizeof(UnsafeOrderedCollection.Entry);
var valAlignment = Native.GetAlignment(valStride);
// the alignment for entry/key/val, we can't have less than ENTRY_ALIGNMENT
// bytes alignment because entries are 12 bytes with 3 x 32 bit integers
var alignment = Math.Max(UnsafeOrderedCollection.Entry.ALIGNMENT, valAlignment);
// calculate strides for all elements
valStride = Native.RoundToAlignment(valStride, alignment);
entryStride = Native.RoundToAlignment(entryStride, alignment);
// dictionary ptr
UnsafeOrderedSet *set;
if (fixedSize)
{
var sizeOfHeader = Native.RoundToAlignment(sizeof(UnsafeOrderedSet), alignment);
var sizeofEntriesBuffer = (entryStride + valStride) * capacity;
// allocate memory
var ptr = Native.MallocAndClear(sizeOfHeader + sizeofEntriesBuffer, alignment);
// start of memory is the set itself
set = (UnsafeOrderedSet *)ptr;
// initialize fixed buffer
UnsafeBuffer.InitFixed(&set->_collection.Entries, (byte *)ptr + sizeOfHeader, capacity, entryStride + valStride);
}
else
{
// allocate set separately
set = Native.MallocAndClear <UnsafeOrderedSet>();
// init dynamic buffer
UnsafeBuffer.InitDynamic(&set->_collection.Entries, capacity, entryStride + valStride);
}
set->_collection.FreeCount = 0;
set->_collection.UsedCount = 0;
set->_collection.KeyOffset = entryStride;
return(set);
}
public static UnsafeStack *Allocate(int capacity, int stride, bool fixedSize = false)
{
Assert.Check(capacity > 0);
Assert.Check(stride > 0);
UnsafeStack *stack;
// fixedSize stack means we are allocating the memory
// for the stack header and the items in it as one block
if (fixedSize)
{
var alignment = AllocHelper.GetAlignmentForArrayElement(stride);
// align stack header size to the elements alignment
var sizeOfStack = AllocHelper.RoundUpToAlignment(sizeof(UnsafeStack), alignment);
var sizeOfArray = stride * capacity;
// allocate memory for stack and array with the correct alignment
var ptr = AllocHelper.MallocAndClear(sizeOfStack + sizeOfArray, alignment);
// grab stack ptr
stack = (UnsafeStack *)ptr;
// initialize fixed buffer from same block of memory as the stack
UnsafeBuffer.InitFixed(&stack->_items, (byte *)ptr + sizeOfStack, capacity, stride);
}
// dynamic sized stack means we're allocating the stack header
// and its memory separately
else
{
// allocate stack separately
stack = AllocHelper.MallocAndClear <UnsafeStack>();
// initialize dynamic buffer with separate memory
UnsafeBuffer.InitDynamic(&stack->_items, capacity, stride);
}
// just safety, make sure count is 0
stack->_count = 0;
return(stack);
}
public static UnsafeHeapMax *Allocate(int capacity, int keyStride, int valStride, bool fixedSize = false)
{
capacity += 1;
// get alignment for key/val
var keyAlignment = Native.GetAlignment(keyStride);
var valAlignment = Native.GetAlignment(valStride);
// pick the max one as our alignment
var alignment = Math.Max(keyAlignment, valAlignment);
// align sizes to their respective alignments
keyStride = Native.RoundToAlignment(keyStride, alignment);
valStride = Native.RoundToAlignment(valStride, alignment);
UnsafeHeapMax *heap;
if (fixedSize)
{
var sizeOfHeader = Native.RoundToAlignment(sizeof(UnsafeHeapMax), alignment);
var sizeOfBuffer = (keyStride + valStride) * capacity;
var ptr = Native.MallocAndClear(sizeOfHeader + sizeOfBuffer, alignment);
// heap pointer
heap = (UnsafeHeapMax *)ptr;
// initialize our fixed buffer
UnsafeBuffer.InitFixed(&heap->_items, (byte *)ptr + sizeOfHeader, capacity, keyStride + valStride);
}
else
{
heap = Native.MallocAndClear <UnsafeHeapMax>();
// dynamic buffer (separate memory)
UnsafeBuffer.InitDynamic(&heap->_items, capacity, keyStride + valStride);
}
heap->_count = 1;
heap->_keyStride = keyStride;
return(heap);
}
public static UnsafeQueue *Allocate(int capacity, int stride, bool fixedSize = false)
{
Assert.Check(capacity > 0);
Assert.Check(stride > 0);
UnsafeQueue *queue;
// fixedSize queue means we are allocating the memory for the header and the items in it as one block
if (fixedSize)
{
var alignment = Native.GetAlignment(stride);
var sizeOfQueue = Native.RoundToAlignment(sizeof(UnsafeQueue), alignment);
var sizeOfArray = stride * capacity;
var ptr = Native.MallocAndClear(sizeOfQueue + sizeOfArray, alignment);
// cast ptr to queue
queue = (UnsafeQueue *)ptr;
// initialize fixed buffer from same block of memory as the stack
UnsafeBuffer.InitFixed(&queue->_items, (byte *)ptr + sizeOfQueue, capacity, stride);
}
// dynamic sized queue means we're allocating the stack header and its memory separately
else
{
// allocate memory for queue
queue = Native.MallocAndClear <UnsafeQueue>();
// initialize dynamic buffer with separate memory
UnsafeBuffer.InitDynamic(&queue->_items, capacity, stride);
}
queue->_head = 0;
queue->_tail = 0;
queue->_count = 0;
return(queue);
}
public static UnsafeList *Allocate(int capacity, int stride, bool fixedSize = false)
{
Assert.Check(capacity > 0);
Assert.Check(stride > 0);
UnsafeList *list;
// fixedSize means we are allocating the memory for the collection header and the items in it as one block
if (fixedSize)
{
var alignment = AllocHelper.GetAlignmentForArrayElement(stride);
// align header size to the elements alignment
var sizeOfHeader = AllocHelper.RoundUpToAlignment(sizeof(UnsafeList), alignment);
var sizeOfBuffer = stride * capacity;
// allocate memory for list and array with the correct alignment
var ptr = AllocHelper.MallocAndClear(sizeOfHeader + sizeOfBuffer, alignment);
// grab header ptr
list = (UnsafeList *)ptr;
// initialize fixed buffer from same block of memory as the collection, offset by sizeOfHeader
UnsafeBuffer.InitFixed(&list->_items, (byte *)ptr + sizeOfHeader, capacity, stride);
}
else
{
// allocate collection separately
list = AllocHelper.MallocAndClear <UnsafeList>();
// initialize dynamic buffer with separate memory
UnsafeBuffer.InitDynamic(&list->_items, capacity, stride);
}
list->_count = 0;
return(list);
}
public static UnsafeHashMap *Allocate(int capacity, int keyStride, int valStride, bool fixedSize = false)
{
var entryStride = sizeof(UnsafeHashCollection.Entry);
// round capacity up to next prime
capacity = UnsafeHashCollection.GetNextPrime(capacity);
// this has to be true
Assert.Check(entryStride == 16);
var keyAlignment = AllocHelper.GetAlignmentForArrayElement(keyStride);
var valAlignment = AllocHelper.GetAlignmentForArrayElement(valStride);
// the alignment for entry/key/val, we can't have less than ENTRY_ALIGNMENT
// bytes alignment because entries are 8 bytes with 2 x 32 bit integers
var alignment = Math.Max(UnsafeHashCollection.Entry.ALIGNMENT, Math.Max(keyAlignment, valAlignment));
// calculate strides for all elements
keyStride = AllocHelper.RoundUpToAlignment(keyStride, alignment);
valStride = AllocHelper.RoundUpToAlignment(valStride, alignment);
entryStride = AllocHelper.RoundUpToAlignment(sizeof(UnsafeHashCollection.Entry), alignment);
// map ptr
UnsafeHashMap *map;
if (fixedSize)
{
var sizeOfHeader = AllocHelper.RoundUpToAlignment(sizeof(UnsafeHashMap), alignment);
var sizeOfBucketsBuffer = AllocHelper.RoundUpToAlignment(sizeof(UnsafeHashCollection.Entry * *) * capacity, alignment);
var sizeofEntriesBuffer = (entryStride + keyStride + valStride) * capacity;
// allocate memory
var ptr = AllocHelper.MallocAndClear(sizeOfHeader + sizeOfBucketsBuffer + sizeofEntriesBuffer, alignment);
// start of memory is the dict itself
map = (UnsafeHashMap *)ptr;
// buckets are offset by header size
map->_collection.Buckets = (UnsafeHashCollection.Entry * *)((byte *)ptr + sizeOfHeader);
// initialize fixed buffer
UnsafeBuffer.InitFixed(&map->_collection.Entries, (byte *)ptr + (sizeOfHeader + sizeOfBucketsBuffer), capacity, entryStride + keyStride + valStride);
}
else
{
// allocate dict, buckets and entries buffer separately
map = AllocHelper.MallocAndClear <UnsafeHashMap>();
map->_collection.Buckets = (UnsafeHashCollection.Entry * *)AllocHelper.MallocAndClear(sizeof(UnsafeHashCollection.Entry * *) * capacity, sizeof(UnsafeHashCollection.Entry * *));
// init dynamic buffer
UnsafeBuffer.InitDynamic(&map->_collection.Entries, capacity, entryStride + keyStride + valStride);
}
// header init
map->_collection.FreeCount = 0;
map->_collection.UsedCount = 0;
map->_collection.KeyOffset = entryStride;
map->_valueOffset = entryStride + keyStride;
return(map);
}