shell_log_backend.h

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/*
 * Copyright (c) 2018 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: Apache-2.0
 */

 
#ifndef ZEPHYR_INCLUDE_SHELL_LOG_BACKEND_H_
#define ZEPHYR_INCLUDE_SHELL_LOG_BACKEND_H_
 
#include <zephyr/kernel.h>
#include <zephyr/logging/log_backend.h>
#include <zephyr/logging/log_output.h>
#include <zephyr/sys/mpsc_pbuf.h>
#include <zephyr/sys/atomic.h>
#ifdef __cplusplus
extern "C" {
#endif
 
extern const struct log_backend_api log_backend_shell_api;

enum shell_log_backend_state {
        SHELL_LOG_BACKEND_UNINIT,
        SHELL_LOG_BACKEND_ENABLED,
        SHELL_LOG_BACKEND_DISABLED,
        SHELL_LOG_BACKEND_PANIC,
};

struct shell_log_backend_control_block {
        atomic_t dropped_cnt;
        enum shell_log_backend_state state;
};

struct shell_log_backend {
        const struct log_backend *backend;
        const struct log_output *log_output;
        struct shell_log_backend_control_block *control_block;
        uint32_t timeout;
        const struct mpsc_pbuf_buffer_config *mpsc_buffer_config;
        struct mpsc_pbuf_buffer *mpsc_buffer;
};

struct shell_log_backend_msg {
        struct log_msg *msg;
        uint32_t timestamp;
};

int z_shell_log_backend_output_func(uint8_t *data, size_t length, void *ctx);

#ifdef CONFIG_SHELL_LOG_BACKEND
#define Z_SHELL_LOG_BACKEND_DEFINE(_name, _buf, _size, _queue_size, _timeout) \
        LOG_BACKEND_DEFINE(_name##_backend, log_backend_shell_api, false); \
        LOG_OUTPUT_DEFINE(_name##_log_output, z_shell_log_backend_output_func,\
                          _buf, _size); \
        static struct shell_log_backend_control_block _name##_control_block; \
        static uint32_t __aligned(Z_LOG_MSG_ALIGNMENT) \
                        _name##_buf[_queue_size / sizeof(uint32_t)]; \
        const struct mpsc_pbuf_buffer_config _name##_mpsc_buffer_config = { \
                .buf = _name##_buf, \
                .size = ARRAY_SIZE(_name##_buf), \
                .notify_drop = NULL, \
                .get_wlen = log_msg_generic_get_wlen, \
                .flags = MPSC_PBUF_MODE_OVERWRITE, \
        }; \
        struct mpsc_pbuf_buffer _name##_mpsc_buffer; \
        static const struct shell_log_backend _name##_log_backend = { \
                .backend = &_name##_backend, \
                .log_output = &_name##_log_output, \
                .control_block = &_name##_control_block, \
                .timeout = _timeout, \
                .mpsc_buffer_config = &_name##_mpsc_buffer_config, \
                .mpsc_buffer = &_name##_mpsc_buffer, \
        }
 
#define Z_SHELL_LOG_BACKEND_PTR(_name) (&_name##_log_backend)
#else /* CONFIG_LOG */
#define Z_SHELL_LOG_BACKEND_DEFINE(_name, _buf, _size, _queue_size, _timeout)
#define Z_SHELL_LOG_BACKEND_PTR(_name) NULL
#endif /* CONFIG_LOG */

void z_shell_log_backend_enable(const struct shell_log_backend *backend,
                                void *ctx, uint32_t init_log_level);

void z_shell_log_backend_disable(const struct shell_log_backend *backend);

bool z_shell_log_backend_process(const struct shell_log_backend *backend);
 
#ifdef __cplusplus
}
#endif
 
#endif /* ZEPHYR_INCLUDE_SHELL_LOG_BACKEND_H_ */