mirror of
https://gitlab.freedesktop.org/mesa/mesa.git
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e0b1193361
This is intended to a Rust analog to "src/util", which has
many utilities used by Mesa developers. This is mostly
a copy of ${crosvm} rutabaga_gfx/src/rutabaga_os (which will
be deleted in favor of this crate).
Key constructs include:
- SharedMemory
- MemoryMapping
- Tube (sockets, essentially)
- OwnedDescriptor (HANDLE or fd-based)
- WaitContext (epoll, ..)
As one would expect, Linux implementations are the most complete.
Acked-by: Aaron Ruby <aruby@qnx.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35210>
54 lines
1.4 KiB
Rust
54 lines
1.4 KiB
Rust
// Copyright 2025 Google
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// SPDX-License-Identifier: MIT
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use crate::defines::MappedRegion;
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use crate::sys::platform::MemoryMapping as PlatformMapping;
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use crate::MesaMapping;
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use crate::MesaResult;
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use crate::OwnedDescriptor;
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pub struct MemoryMapping {
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mapping: PlatformMapping,
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}
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impl MemoryMapping {
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pub fn from_safe_descriptor(
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descriptor: OwnedDescriptor,
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size: usize,
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map_info: u32,
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) -> MesaResult<MemoryMapping> {
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let mapping = PlatformMapping::from_safe_descriptor(descriptor, size, map_info)?;
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Ok(MemoryMapping { mapping })
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}
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pub fn from_offset(
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descriptor: &OwnedDescriptor,
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offset: usize,
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size: usize,
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) -> MesaResult<MemoryMapping> {
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let mapping = PlatformMapping::from_offset(descriptor, offset, size)?;
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Ok(MemoryMapping { mapping })
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}
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pub fn as_mesa_mapping(&self) -> MesaMapping {
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MesaMapping {
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ptr: self.mapping.addr as u64,
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size: self.mapping.size as u64,
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}
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}
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}
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// SAFETY: Safe since these functions just access the MemoryMapping structure.
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unsafe impl MappedRegion for MemoryMapping {
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fn as_ptr(&self) -> *mut u8 {
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self.mapping.addr as *mut u8
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}
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fn size(&self) -> usize {
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self.mapping.size
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}
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fn as_mesa_mapping(&self) -> MesaMapping {
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self.as_mesa_mapping()
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}
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}
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