github.com/metacubex/gvisor@v0.0.0-20240320004321-933faba989ec/pkg/sentry/platform/systrap/context_queue_unsafe.go (about)

     1  // Copyright 2018 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package systrap
    16  
    17  import (
    18  	"unsafe"
    19  
    20  	"golang.org/x/sys/unix"
    21  	"github.com/metacubex/gvisor/pkg/abi/linux"
    22  )
    23  
    24  func (q *contextQueue) wakeupSysmsgThread() {
    25  	unix.RawSyscall6(unix.SYS_FUTEX,
    26  		uintptr(unsafe.Pointer(&q.numThreadsToWakeup)),
    27  		linux.FUTEX_WAKE, 1, 0, 0, 0)
    28  }