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878ddf1f | 1 | /** @file\r |
2 | Implementation of synchronization functions on Itanium.\r | |
3 | \r | |
4 | Copyright (c) 2006, Intel Corporation<BR>\r | |
5 | All rights reserved. This program and the accompanying materials\r | |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | Module Name: Synchronization.c\r | |
14 | \r | |
15 | **/\r | |
16 | \r | |
17 | UINT32\r | |
18 | EFIAPI\r | |
19 | InternalSyncCompareExchange32 (\r | |
20 | IN volatile UINT32 *Value,\r | |
21 | IN UINT32 CompareValue,\r | |
22 | IN UINT32 ExchangeValue\r | |
23 | );\r | |
24 | \r | |
25 | UINT32\r | |
26 | EFIAPI\r | |
27 | InternalSyncIncrement (\r | |
28 | IN volatile UINT32 *Value\r | |
29 | )\r | |
30 | {\r | |
31 | UINT32 OriginalValue;\r | |
32 | \r | |
33 | do {\r | |
34 | OriginalValue = *Value;\r | |
a69c49fc | 35 | } while (OriginalValue != InternalSyncCompareExchange32 (\r |
878ddf1f | 36 | Value,\r |
37 | OriginalValue,\r | |
38 | OriginalValue + 1\r | |
39 | ));\r | |
40 | return OriginalValue + 1;\r | |
41 | }\r | |
42 | \r | |
43 | UINT32\r | |
44 | EFIAPI\r | |
45 | InternalSyncDecrement (\r | |
46 | IN volatile UINT32 *Value\r | |
47 | )\r | |
48 | {\r | |
49 | UINT32 OriginalValue;\r | |
50 | \r | |
51 | do {\r | |
52 | OriginalValue = *Value;\r | |
a69c49fc | 53 | } while (OriginalValue != InternalSyncCompareExchange32 (\r |
878ddf1f | 54 | Value,\r |
55 | OriginalValue,\r | |
56 | OriginalValue - 1\r | |
57 | ));\r | |
58 | return OriginalValue - 1;\r | |
59 | }\r |