Source file test/inline_sync.go

     1  // errorcheck -0 -m
     2  
     3  //go:build !nacl && !386 && !wasm && !arm && !gcflags_noopt
     4  
     5  // Copyright 2019 The Go Authors. All rights reserved.
     6  // Use of this source code is governed by a BSD-style
     7  // license that can be found in the LICENSE file.
     8  
     9  // Test, using compiler diagnostic flags, that inlining of functions
    10  // imported from the sync package is working.
    11  // Compiles but does not run.
    12  
    13  // FIXME: This test is disabled on architectures where atomic operations
    14  // are function calls rather than intrinsics, since this prevents inlining
    15  // of the sync fast paths. This test should be re-enabled once the problem
    16  // is solved.
    17  
    18  package foo
    19  
    20  import (
    21  	"sync"
    22  )
    23  
    24  var mutex *sync.Mutex
    25  
    26  func small5() { // ERROR "can inline small5"
    27  	// the Unlock fast path should be inlined
    28  	mutex.Unlock() // ERROR "inlining call to sync\.\(\*Mutex\)\.Unlock"
    29  }
    30  
    31  func small6() { // ERROR "can inline small6"
    32  	// the Lock fast path should be inlined
    33  	mutex.Lock() // ERROR "inlining call to sync\.\(\*Mutex\)\.Lock"
    34  }
    35  
    36  var once *sync.Once
    37  
    38  func small7() { // ERROR "can inline small7"
    39  	// the Do fast path should be inlined
    40  	once.Do(small5) // ERROR "inlining call to sync\.\(\*Once\)\.Do" "inlining call to atomic\.\(\*Uint32\)\.Load"
    41  }
    42  
    43  var rwmutex *sync.RWMutex
    44  
    45  func small8() { // ERROR "can inline small8"
    46  	// the RUnlock fast path should be inlined
    47  	rwmutex.RUnlock() // ERROR "inlining call to sync\.\(\*RWMutex\)\.RUnlock" "inlining call to atomic\.\(\*Int32\)\.Add"
    48  }
    49  
    50  func small9() { // ERROR "can inline small9"
    51  	// the RLock fast path should be inlined
    52  	rwmutex.RLock() // ERROR "inlining call to sync\.\(\*RWMutex\)\.RLock" "inlining call to atomic\.\(\*Int32\)\.Add"
    53  }
    54  

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