Collect performs a garbage collection.
(ctx context.Context)
| 121 | |
| 122 | // Collect performs a garbage collection. |
| 123 | func (c *Collector) Collect(ctx context.Context) (err error) { |
| 124 | if c.World == nil { |
| 125 | return errors.New("no World") |
| 126 | } |
| 127 | if c.Marker == nil { |
| 128 | return errors.New("no Marker") |
| 129 | } |
| 130 | if c.Roots == nil { |
| 131 | return errors.New("no Roots") |
| 132 | } |
| 133 | if c.Sweeper == nil { |
| 134 | return errors.New("no Sweeper") |
| 135 | } |
| 136 | if c.ItemEnumerator == nil { |
| 137 | return errors.New("no ItemEnumerator") |
| 138 | } |
| 139 | if c.Deleter == nil { |
| 140 | return errors.New("no Deleter") |
| 141 | } |
| 142 | if err := c.World.Stop(); err != nil { |
| 143 | return err |
| 144 | } |
| 145 | defer func() { |
| 146 | startErr := c.World.Start() |
| 147 | if err == nil { |
| 148 | err = startErr |
| 149 | } |
| 150 | }() |
| 151 | |
| 152 | // Mark. |
| 153 | roots := make(chan Item, buffered) |
| 154 | markCtx, cancelMark := context.WithCancel(ctx) |
| 155 | var marker syncutil.Group |
| 156 | marker.Go(func() error { |
| 157 | defer cancelMark() |
| 158 | for it := range roots { |
| 159 | if err := c.markItem(markCtx, it, true); err != nil { |
| 160 | return err |
| 161 | } |
| 162 | } |
| 163 | return nil |
| 164 | }) |
| 165 | marker.Go(func() error { |
| 166 | return c.Roots.Enumerate(markCtx, roots) |
| 167 | }) |
| 168 | if err := marker.Err(); err != nil { |
| 169 | return fmt.Errorf("Mark failure: %v", err) |
| 170 | } |
| 171 | |
| 172 | // Sweep. |
| 173 | all := make(chan Item, buffered) |
| 174 | sweepCtx, cancelSweep := context.WithCancel(ctx) |
| 175 | var sweeper syncutil.Group |
| 176 | sweeper.Go(func() error { |
| 177 | return c.Sweeper.Enumerate(sweepCtx, all) |
| 178 | }) |
| 179 | sweeper.Go(func() error { |
| 180 | defer cancelSweep() |