55 lines
1.8 KiB
Go
55 lines
1.8 KiB
Go
// Copyright 2018 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package kernel
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import (
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"gvisor.dev/gvisor/pkg/sentry/kernel/futex"
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"gvisor.dev/gvisor/pkg/sentry/usermem"
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)
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// Futex returns t's futex manager.
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//
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// Preconditions: The caller must be running on the task goroutine, or t.mu
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// must be locked.
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func (t *Task) Futex() *futex.Manager {
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return t.tc.fu
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}
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// SwapUint32 implements futex.Target.SwapUint32.
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func (t *Task) SwapUint32(addr usermem.Addr, new uint32) (uint32, error) {
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return t.MemoryManager().SwapUint32(t, addr, new, usermem.IOOpts{
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AddressSpaceActive: true,
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})
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}
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// CompareAndSwapUint32 implements futex.Target.CompareAndSwapUint32.
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func (t *Task) CompareAndSwapUint32(addr usermem.Addr, old, new uint32) (uint32, error) {
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return t.MemoryManager().CompareAndSwapUint32(t, addr, old, new, usermem.IOOpts{
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AddressSpaceActive: true,
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})
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}
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// LoadUint32 implements futex.Target.LoadUint32.
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func (t *Task) LoadUint32(addr usermem.Addr) (uint32, error) {
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return t.MemoryManager().LoadUint32(t, addr, usermem.IOOpts{
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AddressSpaceActive: true,
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})
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}
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// GetSharedKey implements futex.Target.GetSharedKey.
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func (t *Task) GetSharedKey(addr usermem.Addr) (futex.Key, error) {
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return t.MemoryManager().GetSharedFutexKey(t, addr)
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}
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