github.com/pawelgaczynski/giouring@v0.0.0-20230826085535-69588b89acb9/sys.go (about)

     1  // MIT License
     2  //
     3  // Copyright (c) 2023 Paweł Gaczyński
     4  //
     5  // Permission is hereby granted, free of charge, to any person obtaining a
     6  // copy of this software and associated documentation files (the
     7  // "Software"), to deal in the Software without restriction, including
     8  // without limitation the rights to use, copy, modify, merge, publish,
     9  // distribute, sublicense, and/or sell copies of the Software, and to
    10  // permit persons to whom the Software is furnished to do so, subject to
    11  // the following conditions:
    12  //
    13  // The above copyright notice and this permission notice shall be included
    14  // in all copies or substantial portions of the Software.
    15  //
    16  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
    17  // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
    18  // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
    19  // IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
    20  // CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
    21  // TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
    22  // SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
    23  
    24  package giouring
    25  
    26  import (
    27  	"math"
    28  	"syscall"
    29  	"unsafe"
    30  )
    31  
    32  func sysMmap(addr, length uintptr, prot, flags, fd int, offset int64) (unsafe.Pointer, error) {
    33  	ptr, err := mmap(addr, length, prot, flags, fd, offset)
    34  
    35  	return unsafe.Pointer(ptr), err
    36  }
    37  
    38  func sysMunmap(addr, length uintptr) error {
    39  	return munmap(addr, length)
    40  }
    41  
    42  func sysMadvise(address, length, advice uintptr) error {
    43  	_, _, err := syscall.Syscall(syscall.SYS_MADVISE, address, length, advice)
    44  
    45  	return err
    46  }
    47  
    48  const liburingUdataTimeout uint64 = math.MaxUint64