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|
use cuda_types::cuda::*;
use hip_runtime_sys::*;
use std::mem::{self, ManuallyDrop, MaybeUninit};
pub(super) mod context;
pub(super) mod device;
pub(super) mod driver;
pub(super) mod function;
pub(super) mod memory;
pub(super) mod module;
pub(super) mod pointer;
#[cfg(debug_assertions)]
pub(crate) fn unimplemented() -> CUresult {
unimplemented!()
}
#[cfg(not(debug_assertions))]
pub(crate) fn unimplemented() -> CUresult {
CUresult::ERROR_NOT_SUPPORTED
}
pub(crate) trait FromCuda<'a, T>: Sized {
fn from_cuda(t: &'a T) -> Result<Self, CUerror>;
}
macro_rules! from_cuda_nop {
($($type_:ty),*) => {
$(
impl<'a> FromCuda<'a, $type_> for $type_ {
fn from_cuda(x: &'a $type_) -> Result<Self, CUerror> {
Ok(*x)
}
}
impl<'a> FromCuda<'a, *mut $type_> for &'a mut $type_ {
fn from_cuda(x: &'a *mut $type_) -> Result<Self, CUerror> {
match unsafe { x.as_mut() } {
Some(x) => Ok(x),
None => Err(CUerror::INVALID_VALUE),
}
}
}
)*
};
}
macro_rules! from_cuda_transmute {
($($from:ty => $to:ty),*) => {
$(
impl<'a> FromCuda<'a, $from> for $to {
fn from_cuda(x: &'a $from) -> Result<Self, CUerror> {
Ok(unsafe { std::mem::transmute(*x) })
}
}
impl<'a> FromCuda<'a, *mut $from> for &'a mut $to {
fn from_cuda(x: &'a *mut $from) -> Result<Self, CUerror> {
match unsafe { x.cast::<$to>().as_mut() } {
Some(x) => Ok(x),
None => Err(CUerror::INVALID_VALUE),
}
}
}
impl<'a> FromCuda<'a, *mut $from> for * mut $to {
fn from_cuda(x: &'a *mut $from) -> Result<Self, CUerror> {
Ok(x.cast::<$to>())
}
}
)*
};
}
macro_rules! from_cuda_object {
($($type_:ty),*) => {
$(
impl<'a> FromCuda<'a, <$type_ as ZludaObject>::CudaHandle> for <$type_ as ZludaObject>::CudaHandle {
fn from_cuda(handle: &'a <$type_ as ZludaObject>::CudaHandle) -> Result<<$type_ as ZludaObject>::CudaHandle, CUerror> {
Ok(*handle)
}
}
impl<'a> FromCuda<'a, *mut <$type_ as ZludaObject>::CudaHandle> for &'a mut <$type_ as ZludaObject>::CudaHandle {
fn from_cuda(handle: &'a *mut <$type_ as ZludaObject>::CudaHandle) -> Result<&'a mut <$type_ as ZludaObject>::CudaHandle, CUerror> {
match unsafe { handle.as_mut() } {
Some(x) => Ok(x),
None => Err(CUerror::INVALID_VALUE),
}
}
}
impl<'a> FromCuda<'a, <$type_ as ZludaObject>::CudaHandle> for &'a $type_ {
fn from_cuda(handle: &'a <$type_ as ZludaObject>::CudaHandle) -> Result<&'a $type_, CUerror> {
Ok(as_ref(handle).as_result()?)
}
}
)*
};
}
from_cuda_nop!(
*mut i8,
*mut i32,
*mut usize,
*const ::core::ffi::c_void,
*const ::core::ffi::c_char,
*mut ::core::ffi::c_void,
*mut *mut ::core::ffi::c_void,
u8,
i32,
u32,
usize,
cuda_types::cuda::CUdevprop,
CUdevice_attribute
);
from_cuda_transmute!(
CUuuid => hipUUID,
CUfunction => hipFunction_t,
CUfunction_attribute => hipFunction_attribute,
CUstream => hipStream_t,
CUpointer_attribute => hipPointer_attribute,
CUdeviceptr_v2 => hipDeviceptr_t
);
from_cuda_object!(module::Module, context::Context);
impl<'a> FromCuda<'a, CUlimit> for hipLimit_t {
fn from_cuda(limit: &'a CUlimit) -> Result<Self, CUerror> {
Ok(match *limit {
CUlimit::CU_LIMIT_STACK_SIZE => hipLimit_t::hipLimitStackSize,
CUlimit::CU_LIMIT_PRINTF_FIFO_SIZE => hipLimit_t::hipLimitPrintfFifoSize,
CUlimit::CU_LIMIT_MALLOC_HEAP_SIZE => hipLimit_t::hipLimitMallocHeapSize,
_ => return Err(CUerror::NOT_SUPPORTED),
})
}
}
pub(crate) trait ZludaObject: Sized + Send + Sync {
const COOKIE: usize;
const LIVENESS_FAIL: CUerror = cuda_types::cuda::CUerror::INVALID_VALUE;
type CudaHandle: Sized;
fn drop_checked(&mut self) -> CUresult;
fn wrap(self) -> Self::CudaHandle {
unsafe { mem::transmute_copy(&LiveCheck::wrap(self)) }
}
}
#[repr(C)]
pub(crate) struct LiveCheck<T: ZludaObject> {
cookie: usize,
data: MaybeUninit<T>,
}
impl<T: ZludaObject> LiveCheck<T> {
fn new(data: T) -> Self {
LiveCheck {
cookie: T::COOKIE,
data: MaybeUninit::new(data),
}
}
fn as_handle(&self) -> T::CudaHandle {
unsafe { mem::transmute_copy(&self) }
}
fn wrap(data: T) -> *mut Self {
Box::into_raw(Box::new(Self::new(data)))
}
fn as_result(&self) -> Result<&T, CUerror> {
if self.cookie == T::COOKIE {
Ok(unsafe { self.data.assume_init_ref() })
} else {
Err(T::LIVENESS_FAIL)
}
}
// This looks like nonsense, but it's not. There are two cases:
// Err(CUerror) -> meaning that the object is invalid, this pointer does not point into valid memory
// Ok(maybe_error) -> meaning that the object is valid, we dropped everything, but there *might*
// an error in the underlying runtime that we want to propagate
#[must_use]
fn drop_checked(&mut self) -> Result<Result<(), CUerror>, CUerror> {
if self.cookie == T::COOKIE {
self.cookie = 0;
let result = unsafe { self.data.assume_init_mut().drop_checked() };
unsafe { MaybeUninit::assume_init_drop(&mut self.data) };
Ok(result)
} else {
Err(T::LIVENESS_FAIL)
}
}
}
pub fn as_ref<'a, T: ZludaObject>(
handle: &'a T::CudaHandle,
) -> &'a ManuallyDrop<Box<LiveCheck<T>>> {
unsafe { mem::transmute(handle) }
}
pub fn drop_checked<T: ZludaObject>(handle: T::CudaHandle) -> Result<(), CUerror> {
let mut wrapped_object: ManuallyDrop<Box<LiveCheck<T>>> =
unsafe { mem::transmute_copy(&handle) };
let underlying_error = LiveCheck::drop_checked(&mut wrapped_object)?;
unsafe { ManuallyDrop::drop(&mut wrapped_object) };
underlying_error
}
|
