Rev 2726 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2726 | vana | 1 | /*++ |
| 2 | |||
| 3 | Copyright (c) 1998 Intel Corporation |
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| 4 | |||
| 5 | Module Name: |
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| 6 | |||
| 7 | lock.c |
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| 8 | |||
| 9 | Abstract: |
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| 10 | |||
| 11 | Implements FLOCK |
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| 12 | |||
| 13 | |||
| 14 | |||
| 15 | Revision History |
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| 16 | |||
| 17 | --*/ |
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| 18 | |||
| 19 | |||
| 20 | #include "lib.h" |
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| 21 | |||
| 22 | |||
| 23 | |||
| 24 | #pragma RUNTIME_CODE(RtAcquireLock) |
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| 25 | VOID |
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| 26 | RtAcquireLock ( |
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| 27 | IN FLOCK *Lock |
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| 28 | ) |
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| 29 | /*++ |
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| 30 | |||
| 31 | Routine Description: |
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| 32 | |||
| 33 | Raising to the task priority level of the mutual exclusion |
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| 34 | lock, and then acquires ownership of the lock. |
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| 35 | |||
| 36 | Arguments: |
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| 37 | |||
| 38 | Lock - The lock to acquire |
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| 39 | |||
| 40 | Returns: |
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| 41 | |||
| 42 | Lock owned |
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| 43 | |||
| 44 | --*/ |
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| 45 | { |
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| 46 | if (BS) { |
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| 47 | if (BS->RaiseTPL != NULL) { |
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| 48 | Lock->OwnerTpl = BS->RaiseTPL(Lock->Tpl); |
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| 49 | } |
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| 50 | } |
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| 51 | else { |
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| 52 | if (LibRuntimeRaiseTPL != NULL) { |
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| 53 | Lock->OwnerTpl = LibRuntimeRaiseTPL(Lock->Tpl); |
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| 54 | } |
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| 55 | } |
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| 56 | Lock->Lock += 1; |
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| 57 | ASSERT (Lock->Lock == 1); |
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| 58 | } |
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| 59 | |||
| 60 | |||
| 61 | #pragma RUNTIME_CODE(RtAcquireLock) |
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| 62 | VOID |
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| 63 | RtReleaseLock ( |
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| 64 | IN FLOCK *Lock |
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| 65 | ) |
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| 66 | /*++ |
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| 67 | |||
| 68 | Routine Description: |
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| 69 | |||
| 70 | Releases ownership of the mutual exclusion lock, and |
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| 71 | restores the previous task priority level. |
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| 72 | |||
| 73 | Arguments: |
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| 74 | |||
| 75 | Lock - The lock to release |
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| 76 | |||
| 77 | Returns: |
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| 78 | |||
| 79 | Lock unowned |
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| 80 | |||
| 81 | --*/ |
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| 82 | { |
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| 83 | EFI_TPL Tpl; |
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| 84 | |||
| 85 | Tpl = Lock->OwnerTpl; |
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| 86 | ASSERT(Lock->Lock == 1); |
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| 87 | Lock->Lock -= 1; |
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| 88 | if (BS) { |
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| 89 | if (BS->RestoreTPL != NULL) { |
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| 90 | BS->RestoreTPL (Tpl); |
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| 91 | } |
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| 92 | } |
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| 93 | else { |
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| 94 | if (LibRuntimeRestoreTPL != NULL) { |
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| 95 | LibRuntimeRestoreTPL(Tpl); |
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| 96 | } |
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| 97 | } |
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| 98 | } |