Rev 2726 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
| Rev 2726 | Rev 3478 | ||
|---|---|---|---|
| 1 | /*++ |
1 | /*++ |
| 2 | 2 | ||
| 3 | Copyright (c) 1998 Intel Corporation |
3 | Copyright (c) 1998 Intel Corporation |
| 4 | 4 | ||
| 5 | Module Name: |
5 | Module Name: |
| 6 | 6 | ||
| 7 | lock.c |
7 | lock.c |
| 8 | 8 | ||
| 9 | Abstract: |
9 | Abstract: |
| 10 | 10 | ||
| 11 | Implements FLOCK |
11 | Implements FLOCK |
| 12 | 12 | ||
| 13 | 13 | ||
| 14 | 14 | ||
| 15 | Revision History |
15 | Revision History |
| 16 | 16 | ||
| 17 | --*/ |
17 | --*/ |
| 18 | 18 | ||
| 19 | 19 | ||
| 20 | #include "lib.h" |
20 | #include "lib.h" |
| 21 | 21 | ||
| 22 | 22 | ||
| 23 | 23 | ||
| 24 | #pragma RUNTIME_CODE(RtAcquireLock) |
24 | #pragma RUNTIME_CODE(RtAcquireLock) |
| 25 | VOID |
25 | VOID |
| 26 | RtAcquireLock ( |
26 | RtAcquireLock ( |
| 27 | IN FLOCK *Lock |
27 | IN FLOCK *Lock |
| 28 | ) |
28 | ) |
| 29 | /*++ |
29 | /*++ |
| 30 | 30 | ||
| 31 | Routine Description: |
31 | Routine Description: |
| 32 | 32 | ||
| 33 | Raising to the task priority level of the mutual exclusion |
33 | Raising to the task priority level of the mutual exclusion |
| 34 | lock, and then acquires ownership of the lock. |
34 | lock, and then acquires ownership of the lock. |
| 35 | |
35 | |
| 36 | Arguments: |
36 | Arguments: |
| 37 | 37 | ||
| 38 | Lock - The lock to acquire |
38 | Lock - The lock to acquire |
| 39 | |
39 | |
| 40 | Returns: |
40 | Returns: |
| 41 | 41 | ||
| 42 | Lock owned |
42 | Lock owned |
| 43 | 43 | ||
| 44 | --*/ |
44 | --*/ |
| 45 | { |
45 | { |
| 46 | if (BS) { |
46 | if (BS) { |
| 47 | if (BS->RaiseTPL != NULL) { |
47 | if (BS->RaiseTPL != NULL) { |
| 48 | Lock->OwnerTpl = BS->RaiseTPL(Lock->Tpl); |
48 | Lock->OwnerTpl = BS->RaiseTPL(Lock->Tpl); |
| 49 | } |
49 | } |
| 50 | } |
50 | } |
| 51 | else { |
51 | else { |
| 52 | if (LibRuntimeRaiseTPL != NULL) { |
52 | if (LibRuntimeRaiseTPL != NULL) { |
| 53 | Lock->OwnerTpl = LibRuntimeRaiseTPL(Lock->Tpl); |
53 | Lock->OwnerTpl = LibRuntimeRaiseTPL(Lock->Tpl); |
| 54 | } |
54 | } |
| 55 | } |
55 | } |
| 56 | Lock->Lock += 1; |
56 | Lock->Lock += 1; |
| 57 | ASSERT (Lock->Lock == 1); |
57 | ASSERT (Lock->Lock == 1); |
| 58 | } |
58 | } |
| 59 | 59 | ||
| 60 | 60 | ||
| 61 | #pragma RUNTIME_CODE(RtAcquireLock) |
61 | #pragma RUNTIME_CODE(RtAcquireLock) |
| 62 | VOID |
62 | VOID |
| 63 | RtReleaseLock ( |
63 | RtReleaseLock ( |
| 64 | IN FLOCK *Lock |
64 | IN FLOCK *Lock |
| 65 | ) |
65 | ) |
| 66 | /*++ |
66 | /*++ |
| 67 | 67 | ||
| 68 | Routine Description: |
68 | Routine Description: |
| 69 | 69 | ||
| 70 | Releases ownership of the mutual exclusion lock, and |
70 | Releases ownership of the mutual exclusion lock, and |
| 71 | restores the previous task priority level. |
71 | restores the previous task priority level. |
| 72 | |
72 | |
| 73 | Arguments: |
73 | Arguments: |
| 74 | 74 | ||
| 75 | Lock - The lock to release |
75 | Lock - The lock to release |
| 76 | |
76 | |
| 77 | Returns: |
77 | Returns: |
| 78 | 78 | ||
| 79 | Lock unowned |
79 | Lock unowned |
| 80 | 80 | ||
| 81 | --*/ |
81 | --*/ |
| 82 | { |
82 | { |
| 83 | EFI_TPL Tpl; |
83 | EFI_TPL Tpl; |
| 84 | 84 | ||
| 85 | Tpl = Lock->OwnerTpl; |
85 | Tpl = Lock->OwnerTpl; |
| 86 | ASSERT(Lock->Lock == 1); |
86 | ASSERT(Lock->Lock == 1); |
| 87 | Lock->Lock -= 1; |
87 | Lock->Lock -= 1; |
| 88 | if (BS) { |
88 | if (BS) { |
| 89 | if (BS->RestoreTPL != NULL) { |
89 | if (BS->RestoreTPL != NULL) { |
| 90 | BS->RestoreTPL (Tpl); |
90 | BS->RestoreTPL (Tpl); |
| 91 | } |
91 | } |
| 92 | } |
92 | } |
| 93 | else { |
93 | else { |
| 94 | if (LibRuntimeRestoreTPL != NULL) { |
94 | if (LibRuntimeRestoreTPL != NULL) { |
| 95 | LibRuntimeRestoreTPL(Tpl); |
95 | LibRuntimeRestoreTPL(Tpl); |
| 96 | } |
96 | } |
| 97 | } |
97 | } |
| 98 | } |
98 | } |
| 99 | 99 | ||