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- /**
- * @file IxEthAccDBLocks_p.h
- *
- * @brief Definition of transaction lock stacks and lock utility macros
- *
- * @par
- * IXP400 SW Release version 2.0
- *
- * -- Copyright Notice --
- *
- * @par
- * Copyright 2001-2005, Intel Corporation.
- * All rights reserved.
- *
- * @par
- * SPDX-License-Identifier: BSD-3-Clause
- * @par
- * -- End of Copyright Notice --
- */
- #ifndef IxEthAccDBLocks_p_H
- #define IxEthAccDBLocks_p_H
- #include "IxOsPrintf.h"
- /* Lock and lock stacks */
- typedef struct
- {
- IxOsalFastMutex* locks[MAX_LOCKS];
- UINT32 stackPointer, basePointer;
- } LockStack;
- #define TRY_LOCK(mutex) \
- { \
- if (ixOsalFastMutexTryLock(mutex) != IX_SUCCESS) \
- { \
- return IX_ETH_DB_BUSY; \
- } \
- }
- #define UNLOCK(mutex) { ixOsalFastMutexUnlock(mutex); }
- #define INIT_STACK(stack) \
- { \
- (stack)->basePointer = 0; \
- (stack)->stackPointer = 0; \
- }
- #define PUSH_LOCK(stack, lock) \
- { \
- if ((stack)->stackPointer == MAX_LOCKS) \
- { \
- ERROR_LOG("Ethernet DB: maximum number of elements in a lock stack has been exceeded on push, heavy chaining?\n"); \
- UNROLL_STACK(stack); \
- \
- return IX_ETH_DB_NOMEM; \
- } \
- \
- if (ixOsalFastMutexTryLock(lock) == IX_SUCCESS) \
- { \
- (stack)->locks[(stack)->stackPointer++] = (lock); \
- } \
- else \
- { \
- UNROLL_STACK(stack); \
- \
- return IX_ETH_DB_BUSY; \
- } \
- }
- #define POP_LOCK(stack) \
- { \
- ixOsalFastMutexUnlock((stack)->locks[--(stack)->stackPointer]); \
- }
- #define UNROLL_STACK(stack) \
- { \
- while ((stack)->stackPointer > (stack)->basePointer) \
- { \
- POP_LOCK(stack); \
- } \
- }
- #define SHIFT_STACK(stack) \
- { \
- if ((stack)->basePointer == MAX_LOCKS - 1) \
- { \
- ERROR_LOG("Ethernet DB: maximum number of elements in a lock stack has been exceeded on shift, heavy chaining?\n"); \
- UNROLL_STACK(stack); \
- \
- return IX_ETH_DB_BUSY; \
- } \
- \
- ixOsalFastMutexUnlock((stack)->locks[(stack)->basePointer++]); \
- }
- #endif /* IxEthAccDBLocks_p_H */
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