process_a.c File Reference

EAST Site - Process A (Vital Channel A - CPU0). More...

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <unistd.h>
#include <time.h>

Include dependency graph for process_a.c:

Go to the source code of this file.

Data Structures
struct	train_command_t
struct	shared_state_t
struct	train_db_entry_t

Macros
#define	TRAIN_COUNT   (sizeof(trains) / sizeof(trains[0]))

Functions
	__attribute__ ((aligned(64)))
static uint32_t	crc32_checksum (const uint8_t *data, uint32_t len)
static train_command_t	compute_train_command (uint32_t train_id, uint32_t position)
int	main (int argc, char *argv[])

Variables
static train_db_entry_t	trains []

Detailed Description

EAST Site - Process A (Vital Channel A - CPU0).

Standby/Backup computation channel for ERTMS RBC East (Barcelona). Mirrors WEST site but remains standby until promoted.

In STANDBY mode:

• Computes commands independently (for synchronization)
• Does not produce final output commands
• Ready to take over if WEST fails

In ONLINE mode (after failover):

• Same as WEST Process A
• Becomes primary computation channel

Definition in file process_a.c.

Macro Definition Documentation

TRAIN_COUNT

#define TRAIN_COUNT   (sizeof(trains) / sizeof(trains[0]))

Definition at line 70 of file process_a.c.

Function Documentation

__attribute__()

__attribute__

(

(aligned(64))

)

Definition at line 52 of file process_a.c.

crc32_checksum()

uint32_t crc32_checksum ( const uint8_t * data, uint32_t len )

static

Definition at line 76 of file process_a.c.

compute_train_command()

train_command_t compute_train_command ( uint32_t train_id, uint32_t position )

static

Definition at line 90 of file process_a.c.

main()

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

Definition at line 126 of file process_a.c.

Variable Documentation

trains

train_db_entry_t trains[]

static

Initial value:

                               = {
    { .train_id = 101, .position = 500 },
    { .train_id = 102, .position = 2500 },
    { .train_id = 103, .position = 7500 },
}

Definition at line 64 of file process_a.c.