github.com/pawelgaczynski/giouring@v0.0.0-20230826085535-69588b89acb9/probe.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 const ( 27 probeOpsSize = 256 28 // int(OpLast + 1) 29 ) 30 31 // liburing: io_uring_get_probe_ring 32 func (ring *Ring) GetProbeRing() (*Probe, error) { 33 probe := &Probe{} 34 _, err := ring.RegisterProbe(probe, probeOpsSize) 35 if err != nil { 36 return nil, err 37 } 38 39 return probe, nil 40 } 41 42 const probeEntries = 2 43 44 // liburing: io_uring_get_probe - https://manpages.debian.org/unstable/liburing-dev/io_uring_get_probe.3.en.html 45 func GetProbe() (*Probe, error) { 46 ring, err := CreateRing(probeEntries) 47 if err != nil { 48 return nil, err 49 } 50 51 probe, err := ring.GetProbeRing() 52 if err != nil { 53 return nil, err 54 } 55 ring.QueueExit() 56 57 return probe, nil 58 } 59 60 // liburing: io_uring_opcode_supported - https://manpages.debian.org/unstable/liburing-dev/io_uring_opcode_supported.3.en.html 61 func (p Probe) IsSupported(op uint8) bool { 62 for i := uint8(0); i < p.OpsLen; i++ { 63 if p.Ops[i].Op != op { 64 continue 65 } 66 67 return p.Ops[i].Flags&opSupported != 0 68 } 69 70 return false 71 }