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package kernel
import (
"reflect"
"gvisor.dev/gvisor/pkg/sync"
"gvisor.dev/gvisor/pkg/sync/locking"
)
// Mutex is sync.Mutex with the correctness validator.
type cgroupMutex struct {
mu sync.Mutex
}
var cgroupprefixIndex *locking.MutexClass
// lockNames is a list of user-friendly lock names.
// Populated in init.
var cgrouplockNames []string
// lockNameIndex is used as an index passed to NestedLock and NestedUnlock,
// referring to an index within lockNames.
// Values are specified using the "consts" field of go_template_instance.
type cgrouplockNameIndex int
// DO NOT REMOVE: The following function automatically replaced with lock index constants.
// LOCK_NAME_INDEX_CONSTANTS
const ()
// Lock locks m.
// +checklocksignore
func (m *cgroupMutex) Lock() {
locking.AddGLock(cgroupprefixIndex, -1)
m.mu.Lock()
}
// NestedLock locks m knowing that another lock of the same type is held.
// +checklocksignore
func (m *cgroupMutex) NestedLock(i cgrouplockNameIndex) {
locking.AddGLock(cgroupprefixIndex, int(i))
m.mu.Lock()
}
// Unlock unlocks m.
// +checklocksignore
func (m *cgroupMutex) Unlock() {
locking.DelGLock(cgroupprefixIndex, -1)
m.mu.Unlock()
}
// NestedUnlock unlocks m knowing that another lock of the same type is held.
// +checklocksignore
func (m *cgroupMutex) NestedUnlock(i cgrouplockNameIndex) {
locking.DelGLock(cgroupprefixIndex, int(i))
m.mu.Unlock()
}
// DO NOT REMOVE: The following function is automatically replaced.
func cgroupinitLockNames() {}
func init() {
cgroupinitLockNames()
cgroupprefixIndex = locking.NewMutexClass(reflect.TypeOf(cgroupMutex{}), cgrouplockNames)
}
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