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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_STREAM_H
#define FLB_STREAM_H
#include <fluent-bit/flb_io.h>
#include <fluent-bit/flb_info.h>
#include <fluent-bit/flb_socket.h>
#include <fluent-bit/flb_config.h>
#define FLB_DOWNSTREAM 1
#define FLB_UPSTREAM 2
#define FLB_TRANSPORT_UNSET 0
#define FLB_TRANSPORT_TCP 1
#define FLB_TRANSPORT_UDP 2
#define FLB_TRANSPORT_UNIX_STREAM 3
#define FLB_TRANSPORT_UNIX_DGRAM 4
/* Base stream from which both downstream and upstream inherit */
struct flb_stream {
int dynamically_allocated;
int thread_safety_flag;
int transport;
int flags;
int type;
pthread_mutex_t list_mutex;
struct flb_tls *tls_context;
struct flb_config *config;
struct flb_net_setup net;
struct mk_list _head;
};
static inline int flb_stream_is_shutting_down(struct flb_stream *stream)
{
return stream->config->is_shutting_down;
}
static inline void flb_stream_setup(struct flb_stream *stream,
int type,
int transport,
int flags,
struct flb_tls *tls_context,
struct flb_config *config,
struct flb_net_setup *net_setup)
{
stream->thread_safety_flag = FLB_FALSE;
stream->tls_context = tls_context;
stream->transport = transport;
stream->config = config;
stream->flags = flags;
stream->type = type;
/* Set default networking setup values */
if (net_setup == NULL) {
flb_net_setup_init(&stream->net);
}
else {
memcpy(&stream->net, net_setup, sizeof(struct flb_net_setup));
}
}
static inline int flb_stream_get_flags(struct flb_stream *stream)
{
return stream->flags;
}
static inline void flb_stream_set_flags(struct flb_stream *stream, int flags)
{
stream->flags = flags;
}
static inline int flb_stream_get_flag_status(struct flb_stream *stream, int flag)
{
return ((flb_stream_get_flags(stream) & flag) != 0);
}
static inline void flb_stream_enable_flags(struct flb_stream *stream, int flag)
{
flb_stream_set_flags(stream, flb_stream_get_flags(stream) | flag);
}
static inline void flb_stream_disable_flags(struct flb_stream *stream, int flag)
{
flb_stream_set_flags(stream, flb_stream_get_flags(stream) & ~flag);
}
static inline void flb_stream_enable_async_mode(struct flb_stream *stream)
{
flb_stream_enable_flags(stream, FLB_IO_ASYNC);
}
static inline void flb_stream_disable_async_mode(struct flb_stream *stream)
{
flb_stream_disable_flags(stream, FLB_IO_ASYNC);
}
static inline int flb_stream_is_async(struct flb_stream *stream)
{
return flb_stream_get_flag_status(stream, FLB_IO_ASYNC);
}
static inline void flb_stream_enable_keepalive(struct flb_stream *stream)
{
flb_stream_enable_flags(stream, FLB_IO_TCP_KA);
}
static inline void flb_stream_disable_keepalive(struct flb_stream *stream)
{
flb_stream_disable_flags(stream, FLB_IO_TCP_KA);
}
static inline int flb_stream_is_keepalive(struct flb_stream *stream)
{
return flb_stream_get_flag_status(stream, FLB_IO_TCP_KA);
}
static inline int flb_stream_is_secure(struct flb_stream *stream)
{
return flb_stream_get_flag_status(stream, FLB_IO_TLS);
}
static inline int flb_stream_is_thread_safe(struct flb_stream *stream)
{
return stream->thread_safety_flag;
}
static inline void flb_stream_enable_thread_safety(struct flb_stream *stream)
{
stream->thread_safety_flag = FLB_TRUE;
pthread_mutex_init(&stream->list_mutex, NULL);
/* We have to avoid any access to ensure that this stream context
* is only this context outside of the worker
* thread.
*/
if (mk_list_entry_orphan(&stream->_head) == 0) {
mk_list_del(&stream->_head);
}
}
static inline int flb_stream_acquire_lock(struct flb_stream *stream,
int wait_flag)
{
int result;
result = 0;
if (stream->thread_safety_flag) {
if (wait_flag) {
result = pthread_mutex_lock(&stream->list_mutex);
}
else {
result = pthread_mutex_trylock(&stream->list_mutex);
}
}
if (result == 0) {
result = FLB_TRUE;
}
else {
result = FLB_FALSE;
}
return result;
}
static inline int flb_stream_release_lock(struct flb_stream *stream)
{
int result;
result = 0;
if (stream->thread_safety_flag) {
result = pthread_mutex_unlock(&stream->list_mutex);
}
if (result == 0) {
result = FLB_TRUE;
}
else {
result = FLB_FALSE;
}
return result;
}
#endif
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