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use fnv::FnvHasher;
use std::collections::HashMap;
use std::collections::hash_map::Entry;
use std::hash::BuildHasherDefault;
use std::sync::Arc;
use std::sync::Mutex;
use device::Device;
use device::DeviceOwned;
use instance::MemoryType;
use memory::DeviceMemory;
use memory::DeviceMemoryAllocError;
use memory::MappedDeviceMemory;
use memory::pool::AllocLayout;
use memory::pool::MappingRequirement;
use memory::pool::MemoryPool;
use memory::pool::MemoryPoolAlloc;
use memory::pool::StdHostVisibleMemoryTypePool;
use memory::pool::StdHostVisibleMemoryTypePoolAlloc;
use memory::pool::StdNonHostVisibleMemoryTypePool;
use memory::pool::StdNonHostVisibleMemoryTypePoolAlloc;
#[derive(Debug)]
pub struct StdMemoryPool {
device: Arc<Device>,
pools:
Mutex<HashMap<(u32, AllocLayout, MappingRequirement), Pool, BuildHasherDefault<FnvHasher>>>,
}
impl StdMemoryPool {
#[inline]
pub fn new(device: Arc<Device>) -> Arc<StdMemoryPool> {
let cap = device.physical_device().memory_types().len();
let hasher = BuildHasherDefault::<FnvHasher>::default();
Arc::new(StdMemoryPool {
device: device.clone(),
pools: Mutex::new(HashMap::with_capacity_and_hasher(cap, hasher)),
})
}
}
unsafe impl MemoryPool for Arc<StdMemoryPool> {
type Alloc = StdMemoryPoolAlloc;
fn alloc_generic(&self, memory_type: MemoryType, size: usize, alignment: usize,
layout: AllocLayout, map: MappingRequirement)
-> Result<StdMemoryPoolAlloc, DeviceMemoryAllocError> {
let mut pools = self.pools.lock().unwrap();
let memory_type_host_visible = memory_type.is_host_visible();
assert!(memory_type_host_visible || map == MappingRequirement::DoNotMap);
match pools.entry((memory_type.id(), layout, map)) {
Entry::Occupied(entry) => {
match entry.get() {
&Pool::HostVisible(ref pool) => {
let alloc = StdHostVisibleMemoryTypePool::alloc(&pool, size, alignment)?;
let inner = StdMemoryPoolAllocInner::HostVisible(alloc);
Ok(StdMemoryPoolAlloc {
inner: inner,
pool: self.clone(),
})
},
&Pool::NonHostVisible(ref pool) => {
let alloc = StdNonHostVisibleMemoryTypePool::alloc(&pool, size, alignment)?;
let inner = StdMemoryPoolAllocInner::NonHostVisible(alloc);
Ok(StdMemoryPoolAlloc {
inner: inner,
pool: self.clone(),
})
},
}
},
Entry::Vacant(entry) => {
if memory_type_host_visible {
let pool = StdHostVisibleMemoryTypePool::new(self.device.clone(), memory_type);
entry.insert(Pool::HostVisible(pool.clone()));
let alloc = StdHostVisibleMemoryTypePool::alloc(&pool, size, alignment)?;
let inner = StdMemoryPoolAllocInner::HostVisible(alloc);
Ok(StdMemoryPoolAlloc {
inner: inner,
pool: self.clone(),
})
} else {
let pool = StdNonHostVisibleMemoryTypePool::new(self.device.clone(),
memory_type);
entry.insert(Pool::NonHostVisible(pool.clone()));
let alloc = StdNonHostVisibleMemoryTypePool::alloc(&pool, size, alignment)?;
let inner = StdMemoryPoolAllocInner::NonHostVisible(alloc);
Ok(StdMemoryPoolAlloc {
inner: inner,
pool: self.clone(),
})
}
},
}
}
}
unsafe impl DeviceOwned for StdMemoryPool {
#[inline]
fn device(&self) -> &Arc<Device> {
&self.device
}
}
#[derive(Debug)]
enum Pool {
HostVisible(Arc<StdHostVisibleMemoryTypePool>),
NonHostVisible(Arc<StdNonHostVisibleMemoryTypePool>),
}
#[derive(Debug)]
pub struct StdMemoryPoolAlloc {
inner: StdMemoryPoolAllocInner,
pool: Arc<StdMemoryPool>,
}
impl StdMemoryPoolAlloc {
#[inline]
pub fn size(&self) -> usize {
match self.inner {
StdMemoryPoolAllocInner::NonHostVisible(ref mem) => mem.size(),
StdMemoryPoolAllocInner::HostVisible(ref mem) => mem.size(),
}
}
}
unsafe impl MemoryPoolAlloc for StdMemoryPoolAlloc {
#[inline]
fn memory(&self) -> &DeviceMemory {
match self.inner {
StdMemoryPoolAllocInner::NonHostVisible(ref mem) => mem.memory(),
StdMemoryPoolAllocInner::HostVisible(ref mem) => mem.memory().as_ref(),
}
}
#[inline]
fn mapped_memory(&self) -> Option<&MappedDeviceMemory> {
match self.inner {
StdMemoryPoolAllocInner::NonHostVisible(_) => None,
StdMemoryPoolAllocInner::HostVisible(ref mem) => Some(mem.memory()),
}
}
#[inline]
fn offset(&self) -> usize {
match self.inner {
StdMemoryPoolAllocInner::NonHostVisible(ref mem) => mem.offset(),
StdMemoryPoolAllocInner::HostVisible(ref mem) => mem.offset(),
}
}
}
#[derive(Debug)]
enum StdMemoryPoolAllocInner {
NonHostVisible(StdNonHostVisibleMemoryTypePoolAlloc),
HostVisible(StdHostVisibleMemoryTypePoolAlloc),
}