rl_server.c File Reference

#include <sys/statvfs.h>
#include <stdio.h>
#include <stdint.h>
#include <libgen.h>
#include "rl_lib.h"
#include "rl_util.h"

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Macros
#define	ARG_COUNT   4
	Number of input arguments required. More...
#define	MAX_STRING_LENGTH   150
	Maximum string line length. More...
#define	MAX_STRING_VALUE   20
	Maximum string value length. More...
#define	TIME_MARGIN   10
	Time margin for buffer number (in ms) More...

Functions
int64_t	get_free_space (char *path)
void	print_json_32 (int32_t data[], int length)
void	print_json_64 (int64_t data[], int length)
void	print_status (void)
void	print_data (void)
int	main (int argc, char *argv[])

Variables
int	sem_id
	ID of semaphore set. More...
struct web_shm *	web_data
	Pointer to shared memory data. More...
uint32_t	id
	Client request id. More...
uint8_t	get_data
	1: data requested, 0: no data requested More...
uint32_t	t_scale
	Requested time scale. More...
int64_t	last_time
	Last client time stamp. More...
int64_t	curr_time
	Time stamp of last buffer stored to shared memory. More...
int8_t	num_channels
	Number of channels sampled. More...
struct rl_status	status
	Current status of RocketLogger. More...
int	buffer_sizes [WEB_RING_BUFFER_COUNT] = {BUFFER1_SIZE, BUFFER10_SIZE, BUFFER100_SIZE}
	Buffer sizes for different time scales. More...

Macro Definition Documentation

#define ARG_COUNT   4

Number of input arguments required.

Copyright (c) 2016-2017, ETH Zurich, Computer Engineering Group

Definition at line 14 of file rl_server.c.

Referenced by main().

#define MAX_STRING_LENGTH   150

Maximum string line length.

Definition at line 16 of file rl_server.c.

Referenced by print_json_32(), and print_json_64().

#define MAX_STRING_VALUE   20

Maximum string value length.

Definition at line 18 of file rl_server.c.

Referenced by print_json_32(), and print_json_64().

#define TIME_MARGIN   10

Time margin for buffer number (in ms)

Definition at line 20 of file rl_server.c.

Referenced by print_data().

Function Documentation

int64_t get_free_space

(

char *

path

)

Get free disk space in a directory

Parameters

path	Path to selected directory

Returns

Free disk space in bytes

Definition at line 54 of file rl_server.c.

Referenced by print_status().

int main	(	int	argc,
		char *	argv[]
	)

RocketLogger server program. Returns status and current sampling data (if available) when running and default configuration otherwise

Parameters

argc	Number of input arguments
argv	Input argument string, consists of: Request ID (can be used for client synchronisation) Data requested (1 for yes, 0 for no) Requested time scale (0: 100 samples/s, 1: 10 samples/s, 2: 1 sample/s) Time stamp in UNIX time (UTC) of most recent data available at web client

Returns

standard Linux return codes

Definition at line 212 of file rl_server.c.

References ARG_COUNT, rl_status::conf, curr_time, DATA_SEM, rl_conf::enable_web_server, ERROR, FAILURE, get_data, last_time, num_channels, web_shm::num_channels, open_sem(), open_web_shm(), print_data(), print_status(), rl_log(), rl_read_status(), RL_RUNNING, S1, S10, S100, rl_status::sampling, SAMPLING_OFF, sem_id, SEM_TIME_OUT, set_sem(), rl_status::state, status, SUCCESS, t_scale, web_shm::time, wait_sem(), WAIT_SEM, and WARNING.

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void print_data

(

void

)

Print requested data in JSON format

Definition at line 137 of file rl_server.c.

References web_shm::buffer, buffer_get(), buffer_sizes, curr_time, DATA_SEM, ringbuffer::element_size, ERROR, ringbuffer::filled, last_time, num_channels, print_json_64(), print_status(), rl_log(), sem_id, SEM_TIME_OUT, set_sem(), SUCCESS, t_scale, TIME_MARGIN, and wait_sem().

Referenced by main().

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void print_json_32	(	int32_t	data[],
		int	length
	)

Print a 32-bit integer array in JSON format

Parameters

data	Data array to print
length	Length of array

Definition at line 68 of file rl_server.c.

References MAX_STRING_LENGTH, and MAX_STRING_VALUE.

Referenced by print_status().

void print_json_64	(	int64_t	data[],
		int	length
	)

Print a 64-bit integer array in JSON format

Parameters

data	Data array to print
length	Length of array

Definition at line 86 of file rl_server.c.

References MAX_STRING_LENGTH, and MAX_STRING_VALUE.

Referenced by print_data().

void print_status

(

void

)

Print current status in JSON format

Definition at line 102 of file rl_server.c.

References rl_conf::calibration, rl_status::calibration_time, rl_conf::channels, rl_status::conf, rl_conf::digital_inputs, rl_conf::enable_web_server, rl_conf::file_format, rl_conf::file_name, rl_conf::force_high_channels, get_free_space(), rl_conf::max_file_size, MAX_PATH_LENGTH, NUM_CHANNELS, NUM_I_CHANNELS, print_json_32(), read_default_config(), rl_read_calibration(), RL_RUNNING, rl_conf::sample_rate, rl_status::samples_taken, rl_status::state, status, rl_calibration::time, and rl_conf::update_rate.

Referenced by main(), and print_data().

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Variable Documentation

int buffer_sizes[WEB_RING_BUFFER_COUNT] = {BUFFER1_SIZE, BUFFER10_SIZE, BUFFER100_SIZE}

Buffer sizes for different time scales.

Definition at line 45 of file rl_server.c.

Referenced by print_data(), and pru_sample().

int64_t curr_time

Time stamp of last buffer stored to shared memory.

Definition at line 37 of file rl_server.c.

Referenced by main(), and print_data().

uint8_t get_data

1: data requested, 0: no data requested

Definition at line 31 of file rl_server.c.

Referenced by main().

uint32_t id

Client request id.

Definition at line 29 of file rl_server.c.

int64_t last_time

Last client time stamp.

Definition at line 35 of file rl_server.c.

Referenced by main(), and print_data().

int8_t num_channels

Number of channels sampled.

Definition at line 39 of file rl_server.c.

Referenced by handle_data_buffer(), main(), meter_print_buffer(), and print_data().

int sem_id

ID of semaphore set.

Definition at line 24 of file rl_server.c.

Referenced by create_sem(), main(), open_sem(), print_data(), and pru_sample().

struct rl_status status

Current status of RocketLogger.

Definition at line 42 of file rl_server.c.

Referenced by handle_data_buffer(), hw_close(), hw_init(), interrupt_handler(), main(), print_status(), pru_sample(), pru_stop(), read_calibration(), rl_log(), sig_handler(), and write_status().

uint32_t t_scale

Requested time scale.

Definition at line 33 of file rl_server.c.

Referenced by main(), and print_data().

struct web_shm* web_data

Pointer to shared memory data.

Definition at line 26 of file rl_server.c.

Referenced by create_web_shm(), handle_data_buffer(), open_web_shm(), and pru_sample().