[−][src]Struct rustacuda::memory::DeviceBox
A pointer type for heap-allocation in CUDA device memory.
See the module-level documentation
for more information on device memory.
Implementations
impl<T: DeviceCopy> DeviceBox<T>
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pub fn new(val: &T) -> CudaResult<Self>
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impl<T> DeviceBox<T>
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pub unsafe fn uninitialized() -> CudaResult<Self>
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Allocate device memory, but do not initialize it.
This doesn't actually allocate if T
is zero-sized.
Safety
Since the backing memory is not initialized, this function is not safe. The caller must ensure that the backing memory is set to a valid value before it is read, else undefined behavior may occur.
Examples
use rustacuda::memory::*; let mut five = unsafe { DeviceBox::uninitialized().unwrap() }; five.copy_from(&5u64).unwrap();
pub unsafe fn zeroed() -> CudaResult<Self>
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Allocate device memory and fill it with zeroes (0u8
).
This doesn't actually allocate if T
is zero-sized.
Safety
The backing memory is zeroed, which may not be a valid bit-pattern for type T
. The caller
must ensure either that all-zeroes is a valid bit-pattern for type T
or that the backing
memory is set to a valid value before it is read.
Examples
use rustacuda::memory::*; let mut zero = unsafe { DeviceBox::zeroed().unwrap() }; let mut value = 5u64; zero.copy_to(&mut value).unwrap(); assert_eq!(0, value);
pub unsafe fn from_raw(ptr: *mut T) -> Self
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Constructs a DeviceBox from a raw pointer.
After calling this function, the raw pointer and the memory it points to is owned by the
DeviceBox. The DeviceBox destructor will free the allocated memory, but will not call the destructor
of T
. This function may accept any pointer produced by the cuMemAllocManaged
CUDA API
call.
Safety
This function is unsafe because improper use may lead to memory problems. For example, a double free may occur if this function is called twice on the same pointer, or a segfault may occur if the pointer is not one returned by the appropriate API call.
Examples
use rustacuda::memory::*; let x = DeviceBox::new(&5).unwrap(); let ptr = DeviceBox::into_device(x).as_raw_mut(); let x = unsafe { DeviceBox::from_raw(ptr) };
pub unsafe fn from_device(ptr: DevicePointer<T>) -> Self
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Constructs a DeviceBox from a DevicePointer.
After calling this function, the pointer and the memory it points to is owned by the
DeviceBox. The DeviceBox destructor will free the allocated memory, but will not call the destructor
of T
. This function may accept any pointer produced by the cuMemAllocManaged
CUDA API
call, such as one taken from DeviceBox::into_device
.
Safety
This function is unsafe because improper use may lead to memory problems. For example, a double free may occur if this function is called twice on the same pointer, or a segfault may occur if the pointer is not one returned by the appropriate API call.
Examples
use rustacuda::memory::*; let x = DeviceBox::new(&5).unwrap(); let ptr = DeviceBox::into_device(x); let x = unsafe { DeviceBox::from_device(ptr) };
pub fn into_device(b: DeviceBox<T>) -> DevicePointer<T>
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Consumes the DeviceBox, returning the wrapped DevicePointer.
After calling this function, the caller is responsible for the memory previously managed by
the DeviceBox. In particular, the caller should properly destroy T and deallocate the memory.
The easiest way to do so is to create a new DeviceBox using the DeviceBox::from_device
function.
Note: This is an associated function, which means that you have to all it as
DeviceBox::into_device(b)
instead of b.into_device()
This is so that there is no conflict with
a method on the inner type.
Examples
use rustacuda::memory::*; let x = DeviceBox::new(&5).unwrap(); let ptr = DeviceBox::into_device(x);
pub fn as_device_ptr(&mut self) -> DevicePointer<T>
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Returns the contained device pointer without consuming the box.
This is useful for passing the box to a kernel launch.
Examples
use rustacuda::memory::*; let mut x = DeviceBox::new(&5).unwrap(); let ptr = x.as_device_ptr(); println!("{:p}", ptr);
pub fn drop(dev_box: DeviceBox<T>) -> DropResult<DeviceBox<T>>
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Destroy a DeviceBox
, returning an error.
Deallocating device memory can return errors from previous asynchronous work. This function destroys the given box and returns the error and the un-destroyed box on failure.
Example
use rustacuda::memory::*; let x = DeviceBox::new(&5).unwrap(); match DeviceBox::drop(x) { Ok(()) => println!("Successfully destroyed"), Err((e, dev_box)) => { println!("Failed to destroy box: {:?}", e); // Do something with dev_box }, }
Trait Implementations
impl<T: DeviceCopy> AsyncCopyDestination<DeviceBox<T>> for DeviceBox<T>
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unsafe fn async_copy_from(
&mut self,
val: &DeviceBox<T>,
stream: &Stream
) -> CudaResult<()>
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&mut self,
val: &DeviceBox<T>,
stream: &Stream
) -> CudaResult<()>
unsafe fn async_copy_to(
&self,
val: &mut DeviceBox<T>,
stream: &Stream
) -> CudaResult<()>
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&self,
val: &mut DeviceBox<T>,
stream: &Stream
) -> CudaResult<()>
impl<T: DeviceCopy> CopyDestination<DeviceBox<T>> for DeviceBox<T>
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fn copy_from(&mut self, val: &DeviceBox<T>) -> CudaResult<()>
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fn copy_to(&self, val: &mut DeviceBox<T>) -> CudaResult<()>
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impl<T: DeviceCopy> CopyDestination<T> for DeviceBox<T>
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fn copy_from(&mut self, val: &T) -> CudaResult<()>
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fn copy_to(&self, val: &mut T) -> CudaResult<()>
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impl<T: Debug> Debug for DeviceBox<T>
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impl<T> Drop for DeviceBox<T>
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impl<T> Pointer for DeviceBox<T>
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Auto Trait Implementations
impl<T> RefUnwindSafe for DeviceBox<T> where
T: RefUnwindSafe,
T: RefUnwindSafe,
impl<T> !Send for DeviceBox<T>
impl<T> !Sync for DeviceBox<T>
impl<T> Unpin for DeviceBox<T>
impl<T> UnwindSafe for DeviceBox<T> where
T: RefUnwindSafe,
T: RefUnwindSafe,
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,