1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
/*
* vim:ts=4:sw=4:expandtab
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include "queue.h"
FILE *pipe_conv;
FILE *pipe_mon;
char *message;
void statistic() {
int current_value = 0, last_value = 0, result;
/* ungenutzte Pipeköpfe schließen */
close(queue[D_CONV_TO_LOG][READ]);
close(queue[D_CONV_TO_LOG][WRITE]);
close(queue[D_CONV_TO_STAT][WRITE]);
close(queue[D_STAT_TO_MON][READ]);
printf("statistic started\n");
/* Die Pipe zum conv Prozess lesend öffnen, die zum monitor schreibend */
if (((pipe_conv = fdopen(queue[D_CONV_TO_STAT][READ], "r")) == NULL) ||
((pipe_mon = fdopen(queue[D_STAT_TO_MON][WRITE], "w")) == NULL)) {
perror("statistic.c fdopen()");
exit(EXIT_FAILURE);
}
/* Speicher für Nachricht reservieren */
if ((message = calloc(1, sizeof(char)*SIZE_HEX+1)) == NULL) {
perror("statistic.c calloc()");
exit(EXIT_FAILURE);
}
/*
* Auslesen der Nachrichten vom conv Prozess, Hälfte des Wertest mit der
* des letzten Wert addieren und an den monitor Prozess schicken.
*/
while (fgets(message, SIZE_HEX+1, pipe_conv)) {
sscanf(message, "%x\n", ¤t_value); /* HEX -> DEC */
result = current_value/2 + last_value/2;
fprintf(pipe_mon, "%x\n", result);
last_value = current_value;
}
}
void statistic_cleanup() {
printf("statistic cleanup\n");
fclose(pipe_conv);
fclose(pipe_mon);
free(message);
close(queue[D_CONV_TO_STAT][READ]);
close(queue[D_STAT_TO_MON][WRITE]);
_exit(EXIT_SUCCESS);
}
|
