| 0,0 → 1,98 |
|---|
| /*++ |
| |
| Copyright (c) 1998 Intel Corporation |
| |
| Module Name: |
| |
| lock.c |
| |
| Abstract: |
| |
| Implements FLOCK |
| |
| |
| |
| Revision History |
| |
| --*/ |
| |
| |
| #include "lib.h" |
| |
| |
| |
| #pragma RUNTIME_CODE(RtAcquireLock) |
| VOID |
| RtAcquireLock ( |
| IN FLOCK *Lock |
| ) |
| /*++ |
| |
| Routine Description: |
| |
| Raising to the task priority level of the mutual exclusion |
| lock, and then acquires ownership of the lock. |
| |
| Arguments: |
| |
| Lock - The lock to acquire |
| |
| Returns: |
| |
| Lock owned |
| |
| --*/ |
| { |
| if (BS) { |
| if (BS->RaiseTPL != NULL) { |
| Lock->OwnerTpl = BS->RaiseTPL(Lock->Tpl); |
| } |
| } |
| else { |
| if (LibRuntimeRaiseTPL != NULL) { |
| Lock->OwnerTpl = LibRuntimeRaiseTPL(Lock->Tpl); |
| } |
| } |
| Lock->Lock += 1; |
| ASSERT (Lock->Lock == 1); |
| } |
| |
| |
| #pragma RUNTIME_CODE(RtAcquireLock) |
| VOID |
| RtReleaseLock ( |
| IN FLOCK *Lock |
| ) |
| /*++ |
| |
| Routine Description: |
| |
| Releases ownership of the mutual exclusion lock, and |
| restores the previous task priority level. |
| |
| Arguments: |
| |
| Lock - The lock to release |
| |
| Returns: |
| |
| Lock unowned |
| |
| --*/ |
| { |
| EFI_TPL Tpl; |
| |
| Tpl = Lock->OwnerTpl; |
| ASSERT(Lock->Lock == 1); |
| Lock->Lock -= 1; |
| if (BS) { |
| if (BS->RestoreTPL != NULL) { |
| BS->RestoreTPL (Tpl); |
| } |
| } |
| else { |
| if (LibRuntimeRestoreTPL != NULL) { |
| LibRuntimeRestoreTPL(Tpl); |
| } |
| } |
| } |