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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#![warn(
trivial_casts,
trivial_numeric_casts,
unused_extern_crates,
unused_qualifications
)]
// We use loops for getting early-out of scope without closures.
#![allow(clippy::never_loop)]
#[macro_use]
mod macros;
pub mod backend {
pub use gfx_backend_empty::Backend as Empty;
#[cfg(dx11)]
pub use gfx_backend_dx11::Backend as Dx11;
#[cfg(dx12)]
pub use gfx_backend_dx12::Backend as Dx12;
#[cfg(gl)]
pub use gfx_backend_gl::Backend as Gl;
#[cfg(metal)]
pub use gfx_backend_metal::Backend as Metal;
#[cfg(vulkan)]
pub use gfx_backend_vulkan::Backend as Vulkan;
}
pub mod binding_model;
pub mod command;
mod conv;
pub mod device;
pub mod hub;
pub mod id;
pub mod instance;
pub mod pipeline;
pub mod resource;
pub mod swap_chain;
mod track;
mod validation;
#[cfg(test)]
use loom::sync::atomic;
#[cfg(not(test))]
use std::sync::atomic;
use atomic::{AtomicUsize, Ordering};
use std::{borrow::Cow, os::raw::c_char, ptr};
pub const MAX_BIND_GROUPS: usize = 8;
type SubmissionIndex = usize;
type Index = u32;
type Epoch = u32;
pub type RawString = *const c_char;
pub type Label<'a> = Option<Cow<'a, str>>;
trait LabelHelpers<'a> {
fn to_string_or_default(&'a self) -> String;
fn borrow_or_default(&'a self) -> &'a str;
}
impl<'a> LabelHelpers<'a> for Label<'a> {
fn borrow_or_default(&'a self) -> &'a str {
self.as_ref().map(|cow| cow.as_ref()).unwrap_or("")
}
fn to_string_or_default(&'a self) -> String {
self.as_ref()
.map(|cow| cow.as_ref())
.unwrap_or("")
.to_string()
}
}
/// Reference count object that is 1:1 with each reference.
#[derive(Debug)]
struct RefCount(ptr::NonNull<AtomicUsize>);
unsafe impl Send for RefCount {}
unsafe impl Sync for RefCount {}
impl RefCount {
const MAX: usize = 1 << 24;
fn load(&self) -> usize {
unsafe { self.0.as_ref() }.load(Ordering::Acquire)
}
/// This works like `std::mem::drop`, except that it returns a boolean which is true if and only
/// if we deallocated the underlying memory, i.e. if this was the last clone of this `RefCount`
/// to be dropped. This is useful for loom testing because it allows us to verify that we
/// deallocated the underlying memory exactly once.
#[cfg(test)]
fn rich_drop_outer(self) -> bool {
unsafe { std::mem::ManuallyDrop::new(self).rich_drop_inner() }
}
/// This function exists to allow `Self::rich_drop_outer` and `Drop::drop` to share the same
/// logic. To use this safely from outside of `Drop::drop`, the calling function must move
/// `Self` into a `ManuallyDrop`.
unsafe fn rich_drop_inner(&mut self) -> bool {
if self.0.as_ref().fetch_sub(1, Ordering::AcqRel) == 1 {
let _ = Box::from_raw(self.0.as_ptr());
true
} else {
false
}
}
}
impl Clone for RefCount {
fn clone(&self) -> Self {
let old_size = unsafe { self.0.as_ref() }.fetch_add(1, Ordering::AcqRel);
assert!(old_size < Self::MAX);
Self(self.0)
}
}
impl Drop for RefCount {
fn drop(&mut self) {
unsafe {
self.rich_drop_inner();
}
}
}
#[cfg(test)]
#[test]
fn loom() {
loom::model(move || {
let bx = Box::new(AtomicUsize::new(1));
let ref_count_main = ptr::NonNull::new(Box::into_raw(bx)).map(RefCount).unwrap();
let ref_count_spawned = ref_count_main.clone();
let join_handle = loom::thread::spawn(move || {
let _ = ref_count_spawned.clone();
ref_count_spawned.rich_drop_outer()
});
let dropped_in_main = ref_count_main.rich_drop_outer();
let dropped_in_spawned = join_handle.join().unwrap();
assert_ne!(
dropped_in_main, dropped_in_spawned,
"must drop exactly once"
);
});
}
/// Reference count object that tracks multiple references.
/// Unlike `RefCount`, it's manually inc()/dec() called.
#[derive(Debug)]
struct MultiRefCount(ptr::NonNull<AtomicUsize>);
unsafe impl Send for MultiRefCount {}
unsafe impl Sync for MultiRefCount {}
impl MultiRefCount {
fn new() -> Self {
let bx = Box::new(AtomicUsize::new(1));
let ptr = Box::into_raw(bx);
Self(unsafe { ptr::NonNull::new_unchecked(ptr) })
}
fn inc(&self) {
unsafe { self.0.as_ref() }.fetch_add(1, Ordering::AcqRel);
}
fn dec_and_check_empty(&self) -> bool {
unsafe { self.0.as_ref() }.fetch_sub(1, Ordering::AcqRel) == 1
}
}
impl Drop for MultiRefCount {
fn drop(&mut self) {
let _ = unsafe { Box::from_raw(self.0.as_ptr()) };
}
}
#[derive(Debug)]
pub struct LifeGuard {
ref_count: Option<RefCount>,
submission_index: AtomicUsize,
#[cfg(debug_assertions)]
pub(crate) label: String,
}
impl LifeGuard {
#[allow(unused_variables)]
fn new(label: &str) -> Self {
let bx = Box::new(AtomicUsize::new(1));
Self {
ref_count: ptr::NonNull::new(Box::into_raw(bx)).map(RefCount),
submission_index: AtomicUsize::new(0),
#[cfg(debug_assertions)]
label: label.to_string(),
}
}
fn add_ref(&self) -> RefCount {
self.ref_count.clone().unwrap()
}
/// Returns `true` if the resource is still needed by the user.
fn use_at(&self, submit_index: SubmissionIndex) -> bool {
self.submission_index.store(submit_index, Ordering::Release);
self.ref_count.is_some()
}
}
#[derive(Clone, Debug)]
struct Stored<T> {
value: id::Valid<T>,
ref_count: RefCount,
}
#[derive(Clone, Copy, Debug)]
struct PrivateFeatures {
shader_validation: bool,
anisotropic_filtering: bool,
texture_d24: bool,
texture_d24_s8: bool,
}
#[macro_export]
macro_rules! gfx_select {
($id:expr => $global:ident.$method:ident( $($param:expr),* )) => {
// Note: For some reason the cfg aliases defined in build.rs don't succesfully apply in this
// macro so we must specify their equivalents manually
match $id.backend() {
#[cfg(any(not(any(target_os = "ios", target_os = "macos")), feature = "gfx-backend-vulkan"))]
wgt::Backend::Vulkan => $global.$method::<$crate::backend::Vulkan>( $($param),* ),
#[cfg(any(target_os = "ios", target_os = "macos"))]
wgt::Backend::Metal => $global.$method::<$crate::backend::Metal>( $($param),* ),
#[cfg(windows)]
wgt::Backend::Dx12 => $global.$method::<$crate::backend::Dx12>( $($param),* ),
#[cfg(windows)]
wgt::Backend::Dx11 => $global.$method::<$crate::backend::Dx11>( $($param),* ),
//#[cfg(all(unix, not(any(target_os = "ios", target_os = "macos"))))]
//wgt::Backend::Gl => $global.$method::<$crate::backend::Gl>( $($param),+ ),
other => panic!("Unexpected backend {:?}", other),
}
};
}
#[macro_export]
macro_rules! span {
($guard_name:tt, $level:ident, $name:expr, $($fields:tt)*) => {
let span = tracing::span!(tracing::Level::$level, $name, $($fields)*);
let $guard_name = span.enter();
};
($guard_name:tt, $level:ident, $name:expr) => {
let span = tracing::span!(tracing::Level::$level, $name);
let $guard_name = span.enter();
};
}
/// Fast hash map used internally.
type FastHashMap<K, V> =
std::collections::HashMap<K, V, std::hash::BuildHasherDefault<fxhash::FxHasher>>;
/// Fast hash set used internally.
type FastHashSet<K> = std::collections::HashSet<K, std::hash::BuildHasherDefault<fxhash::FxHasher>>;
#[test]
fn test_default_limits() {
let limits = wgt::Limits::default();
assert!(limits.max_bind_groups <= MAX_BIND_GROUPS as u32);
}
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