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720d3c5f | 1 | /** @file\r |
2 | InterLockedIncrement function\r | |
3 | \r | |
4cee954e | 4 | Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>\r |
e2d9bfb2 | 5 | This program and the accompanying materials\r |
720d3c5f | 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 | |
2fc59a00 | 8 | http://opensource.org/licenses/bsd-license.php.\r |
720d3c5f | 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 | **/\r | |
14 | \r | |
15 | \r | |
16 | \r | |
17 | \r | |
18 | /**\r | |
19 | Performs an atomic increment of an 32-bit unsigned integer.\r | |
20 | \r | |
21 | Performs an atomic increment of the 32-bit unsigned integer specified by\r | |
22 | Value and returns the incremented value. The increment operation must be\r | |
23 | performed using MP safe mechanisms. The state of the return value is not\r | |
24 | guaranteed to be MP safe.\r | |
25 | \r | |
26 | @param Value A pointer to the 32-bit value to increment.\r | |
27 | \r | |
28 | @return The incremented value.\r | |
29 | \r | |
30 | **/\r | |
31 | UINT32\r | |
32 | EFIAPI\r | |
33 | InternalSyncIncrement (\r | |
4cee954e | 34 | IN volatile UINT32 *Value\r |
720d3c5f | 35 | )\r |
36 | {\r | |
37 | _asm {\r | |
38 | mov eax, Value\r | |
39 | lock inc dword ptr [eax]\r | |
40 | mov eax, [eax]\r | |
41 | }\r | |
42 | }\r | |
43 | \r |