github.com/hslam/atomic@v1.0.0/float32_test.go (about)

     1  // Copyright (c) 2020 Meng Huang (mhboy@outlook.com)
     2  // This package is licensed under a MIT license that can be found in the LICENSE file.
     3  
     4  package atomic
     5  
     6  import (
     7  	"sync"
     8  	"testing"
     9  )
    10  
    11  func TestFloat32(t *testing.T) {
    12  	addr := NewFloat32(3.4e38)
    13  	if addr.Load() != 3.4e38 {
    14  		t.Error(addr.Load())
    15  	}
    16  	addr.Store(0.2)
    17  	if addr.Load() != 0.2 {
    18  		t.Error(addr.Load())
    19  	}
    20  	var delta = float32(0.2)
    21  	if addr.Add(delta) != 0.4 {
    22  		t.Error(addr.Load())
    23  	}
    24  	if addr.Load() != 0.4 {
    25  		t.Error(addr.Load())
    26  	}
    27  	var new = float32(0.5)
    28  	if addr.Swap(new) != 0.4 {
    29  		t.Error(addr.Load())
    30  	}
    31  	var old = new
    32  	new = 0.6
    33  	if !addr.CompareAndSwap(old, new) {
    34  		t.Error(addr.Load())
    35  	}
    36  	if addr.CompareAndSwap(old, new) {
    37  		t.Error(addr.Load())
    38  	}
    39  }
    40  
    41  func TestAddFloat32(t *testing.T) {
    42  	addr := NewFloat32(0.1)
    43  	var wg sync.WaitGroup
    44  	for i := 0; i < 8192; i++ {
    45  		wg.Add(1)
    46  		go func() {
    47  			defer wg.Done()
    48  			addr.Add(0.1)
    49  		}()
    50  	}
    51  	wg.Wait()
    52  }
    53  
    54  func TestCompareAndSwapFloat32(t *testing.T) {
    55  	addr := NewFloat32(0.1)
    56  	var wg sync.WaitGroup
    57  	for i := 0; i < 8192; i++ {
    58  		wg.Add(1)
    59  		go func() {
    60  			defer wg.Done()
    61  			addr.CompareAndSwap(0.1, 0.2)
    62  		}()
    63  	}
    64  	wg.Wait()
    65  }
    66  
    67  func TestSwapFloat32(t *testing.T) {
    68  	addr := NewFloat32(0.1)
    69  	var wg sync.WaitGroup
    70  	for i := 0; i < 8192; i++ {
    71  		wg.Add(1)
    72  		go func() {
    73  			defer wg.Done()
    74  			addr.Swap(0.1)
    75  		}()
    76  	}
    77  	wg.Wait()
    78  }