client/message.h

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2025 Olaf Wintermann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef CLIENT_MESSAGE_H
#define CLIENT_MESSAGE_H

#include <cx/string.h>
#include <cx/json.h>
#include <cx/buffer.h>

#include <pthread.h>

#ifdef __cplusplus
extern "C" {
#endif

typedef struct MessageHandler MessageHandler;

typedef void(*msg_received_callback)(cxmutstr msg);

struct MessageHandler {
    int (*start)(MessageHandler *handler);
    int (*stop)(MessageHandler *handler);
    int (*send)(MessageHandler *handler, cxstring msg);
    
    msg_received_callback callback;
};

typedef struct SimpleMessageHandler {
    MessageHandler handler;
    int in;
    int out;
    pthread_t in_thread;
    pthread_t out_thread;
    pthread_mutex_t queue_lock;
    pthread_mutex_t avlbl_lock;
    pthread_cond_t  available;
    CxBuffer *outbuf;
    int stop;
} SimpleMessageHandler;

MessageHandler* simple_msg_handler(int in, int out, msg_received_callback callback);
int simple_msg_handler_start(MessageHandler *handler);
int simple_msg_handler_stop(MessageHandler *handler);
int simple_msg_handler_send(MessageHandler *handler, cxstring msg);

void* simple_msg_handler_in_thread(void *data);
void* simple_msg_handler_out_thread(void *data);


#ifdef __cplusplus
}
#endif

#endif /* CLIENT_MESSAGE_H */