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1 | sclass Borrowable<A> implements AutoCloseable {
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2 | A object; |
3 | bool borrowed; |
4 | |
5 | *(A *object) {}
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6 | *() {}
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7 | |
8 | synchronized void set(A object) {
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9 | this.object = object; |
10 | borrowed = false; |
11 | } |
12 | |
13 | synchronized bool canBorrow() { ret object != null && !borrowed; }
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14 | |
15 | synchronized bool isBorrowed() { ret borrowed; }
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16 | |
17 | // returns null if object is borrowed |
18 | synchronized IAutoCloseableF0<A> tempBorrow() {
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19 | bool canBorrow = canBorrow(); |
20 | A o = canBorrow ? object : null; |
21 | if (canBorrow) borrowed = true; |
22 | |
23 | ret new IAutoCloseableF0<A> {
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24 | public A get() { ret o; }
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25 | public void close { unborrow(o); }
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26 | }; |
27 | } |
28 | |
29 | synchronized void unborrow(A o) {
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30 | if (o == object) borrowed = false; |
31 | } |
32 | |
33 | public void close() {
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34 | O o; |
35 | synchronized(this) {
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36 | o = object; |
37 | object = null; |
38 | } |
39 | dispose o; |
40 | } |
41 | } |
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| Snippet ID: | #1032349 |
| Snippet name: | Borrowable |
| Eternal ID of this version: | #1032349/7 |
| Text MD5: | c810dce629b89e498390413454488c3e |
| Transpilation MD5: | 9206b2856386b3c3cae79e977809eb9d |
| Author: | stefan |
| Category: | javax |
| Type: | JavaX fragment (include) |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2021-08-30 04:26:43 |
| Source code size: | 893 bytes / 41 lines |
| Pitched / IR pitched: | No / No |
| Views / Downloads: | 109 / 228 |
| Version history: | 6 change(s) |
| Referenced in: | [show references] |