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720d3c5f | 1 | /** @file\r |
2 | InterlockedDecrement function\r | |
3 | \r | |
17634d02 | 4 | Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r |
9344f092 | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
720d3c5f | 6 | \r |
7 | **/\r | |
8 | \r | |
9 | /**\r | |
10 | Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.\r | |
11 | **/\r | |
12 | \r | |
13 | long _InterlockedDecrement(\r | |
14 | long * lpAddend\r | |
15 | );\r | |
16 | \r | |
17 | #pragma intrinsic(_InterlockedDecrement)\r | |
18 | \r | |
19 | /**\r | |
20 | Performs an atomic decrement of an 32-bit unsigned integer.\r | |
21 | \r | |
22 | Performs an atomic decrement of the 32-bit unsigned integer specified by\r | |
23 | Value and returns the decrement value. The decrement operation must be\r | |
24 | performed using MP safe mechanisms. The state of the return value is not\r | |
25 | guaranteed to be MP safe.\r | |
26 | \r | |
27 | @param Value A pointer to the 32-bit value to decrement.\r | |
28 | \r | |
29 | @return The decrement value.\r | |
30 | \r | |
31 | **/\r | |
32 | UINT32\r | |
33 | EFIAPI\r | |
34 | InternalSyncDecrement (\r | |
4cee954e | 35 | IN volatile UINT32 *Value\r |
720d3c5f | 36 | )\r |
37 | {\r | |
17634d02 | 38 | return _InterlockedDecrement ((long *)(Value));\r |
720d3c5f | 39 | }\r |
40 | \r |