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e386b444 | 1 | /** @file\r |
bf295af2 | 2 | This library retrieve the EFI_BOOT_SERVICES pointer from EFI system table in \r |
3 | library's constructor.\r | |
e386b444 | 4 | \r |
19388d29 HT |
5 | Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r |
6 | This program and the accompanying materials\r | |
e386b444 | 7 | are licensed and made available under the terms and conditions of the BSD License\r |
8 | which accompanies this distribution. The full text of the license may be found at\r | |
2fc59a00 | 9 | http://opensource.org/licenses/bsd-license.php.\r |
e386b444 | 10 | \r |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
e386b444 | 14 | **/\r |
15 | \r | |
c892d846 | 16 | \r |
60c93673 | 17 | #include <Uefi.h>\r |
c892d846 | 18 | \r |
c7d265a9 | 19 | #include <Library/UefiBootServicesTableLib.h>\r |
20 | #include <Library/DebugLib.h>\r | |
e386b444 | 21 | \r |
22 | EFI_HANDLE gImageHandle = NULL;\r | |
23 | EFI_SYSTEM_TABLE *gST = NULL;\r | |
24 | EFI_BOOT_SERVICES *gBS = NULL;\r | |
25 | \r | |
26 | /**\r | |
27 | The constructor function caches the pointer of Boot Services Table.\r | |
a73480f6 | 28 | \r |
e386b444 | 29 | The constructor function caches the pointer of Boot Services Table through System Table.\r |
30 | It will ASSERT() if the pointer of System Table is NULL.\r | |
31 | It will ASSERT() if the pointer of Boot Services Table is NULL.\r | |
32 | It will always return EFI_SUCCESS.\r | |
33 | \r | |
34 | @param ImageHandle The firmware allocated handle for the EFI image.\r | |
35 | @param SystemTable A pointer to the EFI System Table.\r | |
36 | \r | |
37 | @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.\r | |
38 | \r | |
39 | **/\r | |
40 | EFI_STATUS\r | |
41 | EFIAPI\r | |
42 | UefiBootServicesTableLibConstructor (\r | |
43 | IN EFI_HANDLE ImageHandle,\r | |
44 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
45 | )\r | |
46 | {\r | |
47 | //\r | |
48 | // Cache the Image Handle\r | |
49 | //\r | |
50 | gImageHandle = ImageHandle;\r | |
51 | ASSERT (gImageHandle != NULL);\r | |
52 | \r | |
53 | //\r | |
54 | // Cache pointer to the EFI System Table\r | |
55 | //\r | |
56 | gST = SystemTable;\r | |
57 | ASSERT (gST != NULL);\r | |
58 | \r | |
59 | //\r | |
60 | // Cache pointer to the EFI Boot Services Table\r | |
61 | //\r | |
62 | gBS = SystemTable->BootServices;\r | |
63 | ASSERT (gBS != NULL);\r | |
64 | \r | |
65 | return EFI_SUCCESS;\r | |
66 | }\r |