61 lines
2.0 KiB
C
61 lines
2.0 KiB
C
/*
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* Copyright (c) 2020 Huawei Technologies Co.,Ltd.
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*
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* openGauss is licensed under Mulan PSL v2.
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* You can use this software according to the terms and conditions of the Mulan PSL v2.
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* You may obtain a copy of Mulan PSL v2 at:
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*
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* http://license.coscl.org.cn/MulanPSL2
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*
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PSL v2 for more details.
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* ---------------------------------------------------------------------------------------
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*
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* logical_queue.h
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*
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*
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*
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* IDENTIFICATION
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* src/include/replication/logical_queue.h
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*
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* ---------------------------------------------------------------------------------------
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*/
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#ifndef LOGICAL_QUEUE_H
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#define LOGICAL_QUEUE_H
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#include "postgres.h"
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#include "knl/knl_variable.h"
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#define DEFAULT_PARALLEL_QUEUE_SIZE 128
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#define MAX_PARALLEL_QUEUE_SIZE 1024
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#define MIN_PARALLEL_QUEUE_SIZE 2
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#define POWER_OF_TWO(x) (((x) & ((x)-1)) == 0)
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#define COUNT(head, tail, mask) ((uint32)(((head) - (tail)) & (mask)))
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#define SPACE(head, tail, mask) ((uint32)(((tail) - ((head) + 1)) & (mask)))
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typedef void (*CallBackFunc)();
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typedef struct LogicalQueue {
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pg_atomic_uint32 writeHead; /* Array index for the next write. */
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pg_atomic_uint32 readTail; /* Array index for the next read. */
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uint32 capacity; /* Queue capacity, must be power of 2. */
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uint32 mask; /* Bit mask for computing index. */
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pg_atomic_uint32 maxUsage;
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pg_atomic_uint64 totalCnt;
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CallBackFunc callBackFunc;
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void* buffer[1]; /* Queue buffer, the actual size is capacity. */
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} LogicalQueue;
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LogicalQueue *LogicalQueueCreate(int slotId, CallBackFunc func = NULL);
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void LogicalQueuePut(LogicalQueue* queue, void* element);
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void* LogicalQueueTop(LogicalQueue* queue);
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void LogicalQueuePop(LogicalQueue* queue);
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#endif
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