Source file src/runtime/lockrank_off.go

     1  // Copyright 2020 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build !goexperiment.staticlockranking
     6  
     7  package runtime
     8  
     9  const staticLockRanking = false
    10  
    11  // // lockRankStruct is embedded in mutex, but is empty when staticklockranking is
    12  // disabled (the default)
    13  type lockRankStruct struct {
    14  }
    15  
    16  func lockInit(l *mutex, rank lockRank) {
    17  }
    18  
    19  func getLockRank(l *mutex) lockRank {
    20  	return 0
    21  }
    22  
    23  func lockWithRank(l *mutex, rank lockRank) {
    24  	lock2(l)
    25  }
    26  
    27  // This function may be called in nosplit context and thus must be nosplit.
    28  //
    29  //go:nosplit
    30  func acquireLockRankAndM(rank lockRank) {
    31  	mp := acquirem()
    32  	mp.locks += mutexMLocksDelta // not safe to profile right now
    33  }
    34  
    35  func unlockWithRank(l *mutex) {
    36  	unlock2(l)
    37  }
    38  
    39  // This function may be called in nosplit context and thus must be nosplit.
    40  //
    41  //go:nosplit
    42  func releaseLockRankAndM(rank lockRank) {
    43  	mp := getg().m
    44  	mp.locks -= mutexMLocksDelta
    45  	releasem(mp)
    46  }
    47  
    48  // This function may be called in nosplit context and thus must be nosplit.
    49  //
    50  //go:nosplit
    51  func lockWithRankMayAcquire(l *mutex, rank lockRank) {
    52  }
    53  
    54  //go:nosplit
    55  func assertLockHeld(l *mutex) {
    56  }
    57  
    58  //go:nosplit
    59  func assertRankHeld(r lockRank) {
    60  }
    61  
    62  //go:nosplit
    63  func worldStopped() {
    64  }
    65  
    66  //go:nosplit
    67  func worldStarted() {
    68  }
    69  
    70  //go:nosplit
    71  func assertWorldStopped() {
    72  }
    73  
    74  //go:nosplit
    75  func assertWorldStoppedOrLockHeld(l *mutex) {
    76  }
    77  

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