rutabaga_gfx/rutabaga_os/
shm.rs

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1// Copyright 2020 The ChromiumOS Authors
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5use std::ffi::CString;
6
7use crate::rutabaga_os::sys::platform::SharedMemory as SysUtilSharedMemory;
8use crate::rutabaga_os::AsRawDescriptor;
9use crate::rutabaga_os::FromRawDescriptor;
10use crate::rutabaga_os::IntoRawDescriptor;
11use crate::rutabaga_os::RawDescriptor;
12use crate::rutabaga_os::SafeDescriptor;
13use crate::rutabaga_utils::RutabagaResult;
14
15pub struct SharedMemory(pub(crate) SysUtilSharedMemory);
16impl SharedMemory {
17    /// Creates a new shared memory object of the given size.
18    ///
19    /// |name| is purely for debugging purposes. It does not need to be unique, and it does
20    /// not affect any non-debugging related properties of the constructed shared memory.
21    pub fn new<T: Into<Vec<u8>>>(debug_name: T, size: u64) -> RutabagaResult<SharedMemory> {
22        let debug_name = CString::new(debug_name)?;
23        SysUtilSharedMemory::new(&debug_name, size).map(SharedMemory)
24    }
25
26    pub fn size(&self) -> u64 {
27        self.0.size()
28    }
29}
30
31impl AsRawDescriptor for SharedMemory {
32    fn as_raw_descriptor(&self) -> RawDescriptor {
33        self.0.as_raw_descriptor()
34    }
35}
36
37impl IntoRawDescriptor for SharedMemory {
38    fn into_raw_descriptor(self) -> RawDescriptor {
39        self.0.into_raw_descriptor()
40    }
41}
42
43impl From<SharedMemory> for SafeDescriptor {
44    fn from(sm: SharedMemory) -> SafeDescriptor {
45        // SAFETY:
46        // Safe because we own the SharedMemory at this point.
47        unsafe { SafeDescriptor::from_raw_descriptor(sm.into_raw_descriptor()) }
48    }
49}
rutabaga_gfx/rutabaga_os/shm.rs

rutabaga_gfx/rutabaga_os/
shm.rs
