2 * @file IxEthAccDBLocks_p.h
4 * @brief Definition of transaction lock stacks and lock utility macros
7 * IXP400 SW Release version 2.0
9 * -- Copyright Notice --
12 * Copyright 2001-2005, Intel Corporation.
13 * All rights reserved.
16 * SPDX-License-Identifier: BSD-3-Clause
18 * -- End of Copyright Notice --
21 #ifndef IxEthAccDBLocks_p_H
22 #define IxEthAccDBLocks_p_H
24 #include "IxOsPrintf.h"
26 /* Lock and lock stacks */
29 IxOsalFastMutex* locks[MAX_LOCKS];
30 UINT32 stackPointer, basePointer;
33 #define TRY_LOCK(mutex) \
35 if (ixOsalFastMutexTryLock(mutex) != IX_SUCCESS) \
37 return IX_ETH_DB_BUSY; \
42 #define UNLOCK(mutex) { ixOsalFastMutexUnlock(mutex); }
44 #define INIT_STACK(stack) \
46 (stack)->basePointer = 0; \
47 (stack)->stackPointer = 0; \
50 #define PUSH_LOCK(stack, lock) \
52 if ((stack)->stackPointer == MAX_LOCKS) \
54 ERROR_LOG("Ethernet DB: maximum number of elements in a lock stack has been exceeded on push, heavy chaining?\n"); \
55 UNROLL_STACK(stack); \
57 return IX_ETH_DB_NOMEM; \
60 if (ixOsalFastMutexTryLock(lock) == IX_SUCCESS) \
62 (stack)->locks[(stack)->stackPointer++] = (lock); \
66 UNROLL_STACK(stack); \
68 return IX_ETH_DB_BUSY; \
72 #define POP_LOCK(stack) \
74 ixOsalFastMutexUnlock((stack)->locks[--(stack)->stackPointer]); \
77 #define UNROLL_STACK(stack) \
79 while ((stack)->stackPointer > (stack)->basePointer) \
85 #define SHIFT_STACK(stack) \
87 if ((stack)->basePointer == MAX_LOCKS - 1) \
89 ERROR_LOG("Ethernet DB: maximum number of elements in a lock stack has been exceeded on shift, heavy chaining?\n"); \
90 UNROLL_STACK(stack); \
92 return IX_ETH_DB_BUSY; \
95 ixOsalFastMutexUnlock((stack)->locks[(stack)->basePointer++]); \
98 #endif /* IxEthAccDBLocks_p_H */