34 lines
705 B
Rust
34 lines
705 B
Rust
use {
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crate::utils::{oserror::OsError, ptr_ext::PtrExt},
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std::ptr,
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uapi::c,
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};
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pub struct Mmapped {
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pub ptr: *const [u8],
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}
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pub fn mmap(
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len: usize,
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prot: c::c_int,
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flags: c::c_int,
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fd: c::c_int,
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offset: c::off_t,
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) -> Result<Mmapped, OsError> {
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let res = unsafe { c::mmap(ptr::null_mut(), len, prot, flags, fd, offset) };
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if res == c::MAP_FAILED {
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Err(OsError::default())
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} else {
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Ok(Mmapped {
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ptr: ptr::slice_from_raw_parts(res.cast(), len),
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})
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}
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}
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impl Drop for Mmapped {
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fn drop(&mut self) {
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unsafe {
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c::munmap(self.ptr.deref().as_ptr() as _, self.ptr.deref().len());
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}
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}
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}
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