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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* Fluent Bit
* ==========
* Copyright (C) 2015-2022 The Fluent Bit Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef FLB_RING_BUFFER_H
#define FLB_RING_BUFFER_H
#include <fluent-bit/flb_pipe.h>
struct flb_ring_buffer {
void *ctx; /* pointer to backend context */
void *event_loop; /* event loop where this ring buffer emits flush request signals */
int flush_pending; /* flag meant to prevent flush request signal flood */
void *signal_event; /* event loop entry for the flush request signal */
flb_pipefd_t signal_channels[2]; /* flush request signaling channel */
uint64_t data_window; /* 0% - 100% occupancy window flush request */
uint64_t data_size; /* ring buffer size */
void *data_buf; /* ring buffer */
};
struct flb_ring_buffer *flb_ring_buffer_create(uint64_t size);
void flb_ring_buffer_destroy(struct flb_ring_buffer *rb);
int flb_ring_buffer_add_event_loop(struct flb_ring_buffer *rb, void *evl, uint8_t window_size);
int flb_ring_buffer_write(struct flb_ring_buffer *rb, void *ptr, size_t size);
int flb_ring_buffer_read(struct flb_ring_buffer *rb, void *ptr, size_t size);
#endif
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