github.com/lirm/aeron-go@v0.0.0-20230415210743-920325491dc4/aeron/atomic/buffer_test.go (about)

     1  /*
     2  Copyright 2016 Stanislav Liberman
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8  http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package atomic
    18  
    19  import (
    20  	"github.com/stretchr/testify/assert"
    21  	"testing"
    22  	"unsafe"
    23  )
    24  
    25  var buffer *Buffer
    26  
    27  func TestMakeAtomicBuffer(t *testing.T) {
    28  	var b *Buffer
    29  
    30  	b = MakeBuffer()
    31  	t.Logf("buf: %v", b)
    32  
    33  	b = MakeBuffer(nil)
    34  	t.Logf("buf: %v", b)
    35  
    36  	arr := make([]byte, 64)
    37  
    38  	b = MakeBuffer(arr)
    39  	t.Logf("buf: %v", b)
    40  
    41  	b = MakeBuffer(arr, 64)
    42  	t.Logf("buf: %v", b)
    43  
    44  	b = MakeBuffer(unsafe.Pointer(&arr[0]))
    45  	t.Logf("buf: %v", b)
    46  
    47  	b = MakeBuffer(unsafe.Pointer(&arr[0]), 64)
    48  	t.Logf("buf: %v", b)
    49  
    50  	b = MakeBuffer(uintptr(unsafe.Pointer(&arr[0])), 64)
    51  	t.Logf("buf: %v", b)
    52  }
    53  
    54  func TestInit(t *testing.T) {
    55  	buffer = MakeBuffer()
    56  	assert.Equal(t, int32(0), buffer.Capacity())
    57  
    58  	bytes := make([]byte, 32)
    59  	bufLen := int32(len(bytes))
    60  
    61  	buffer.Wrap(unsafe.Pointer(&bytes), bufLen)
    62  	assert.Equal(t, bufLen, buffer.Capacity())
    63  }
    64  
    65  func TestGetAndAddInt64(t *testing.T) {
    66  	buffer = MakeBuffer(make([]byte, 32), 32)
    67  	buffer.Fill(0)
    68  
    69  	assert.Equal(t, int64(0), buffer.GetAndAddInt64(0, 7))
    70  	assert.Equal(t, int64(0), buffer.GetAndAddInt64(8, 7))
    71  	assert.Equal(t, int64(0), buffer.GetAndAddInt64(16, 7))
    72  	assert.Equal(t, int64(0), buffer.GetAndAddInt64(24, 7))
    73  
    74  	assert.Equal(t, int64(7), buffer.GetAndAddInt64(0, 7))
    75  	assert.Equal(t, int64(7), buffer.GetAndAddInt64(8, 7))
    76  	assert.Equal(t, int64(7), buffer.GetAndAddInt64(16, 7))
    77  	assert.Equal(t, int64(7), buffer.GetAndAddInt64(24, 7))
    78  
    79  	assert.Equal(t, int64(14), buffer.GetAndAddInt64(0, 7))
    80  	assert.Equal(t, int64(14), buffer.GetAndAddInt64(8, 7))
    81  	assert.Equal(t, int64(14), buffer.GetAndAddInt64(16, 7))
    82  	assert.Equal(t, int64(14), buffer.GetAndAddInt64(24, 7))
    83  }
    84  
    85  func TestPutInt64Ordered(t *testing.T) {
    86  	buffer = MakeBuffer(make([]byte, 32), 32)
    87  	buffer.Fill(0)
    88  
    89  	buffer.PutInt64Ordered(1, 31415)
    90  	assert.Equal(t, int64(31415), buffer.GetInt64Volatile(1))
    91  	assert.NotEqual(t, int64(31415), buffer.GetInt64Volatile(2))
    92  	assert.NotEqual(t, int64(31415), buffer.GetInt64Volatile(0))
    93  }
    94  
    95  func TestWrap(t *testing.T) {
    96  	bytes := make([]byte, 32)
    97  	ptr := unsafe.Pointer(&bytes[0])
    98  	buffer = MakeBuffer(bytes, 32)
    99  	buffer.Fill(0)
   100  	t.Logf("buf: %v", buffer)
   101  
   102  	buffer.PutInt64Ordered(1, 31415)
   103  	assert.Equal(t, int64(31415), buffer.GetInt64Volatile(1))
   104  	assert.NotEqual(t, int64(31415), buffer.GetInt64Volatile(2))
   105  	assert.NotEqual(t, int64(31415), buffer.GetInt64Volatile(0))
   106  
   107  	newPtr := unsafe.Pointer(uintptr(ptr) + uintptr(1))
   108  	t.Logf("Old pointer: %v; new pointer: %v", ptr, newPtr)
   109  	var newLen int32 = 31
   110  	buffer.Wrap(newPtr, newLen)
   111  	assert.Equal(t, newLen, buffer.Capacity())
   112  
   113  	assert.NotEqual(t, int64(31415), buffer.GetInt64Volatile(1))
   114  	assert.Equal(t, int64(31415), buffer.GetInt64Volatile(0))
   115  }