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annotate data-provider.h @ 101:8b90fbba59ef

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Fix buffer size in SendMessage macro
author Daniele Nicolodi <daniele.nicolodi@obspm.fr>
date Mon, 08 Apr 2013 16:15:44 +0200
parents 99cbe2b57530
children be87c8e78266
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1 #ifndef __DATA_PROVIDER_H__
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2 #define __DATA_PROVIDER_H__
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3
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4 #include <future.h>
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5
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6 /* data acquisition flag */
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7 extern int acquiring;
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8
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9 /* data queue */
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10 extern CmtTSQHandle dataQueue;
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11
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12 /* callback receiving messages in the main thread */
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13 void CVICALLBACK MessageCB (void *callbackData);
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14
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15 /* data acquisition event */
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16 struct event {
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17 struct timeval time;
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18 double data[4];
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19 };
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20
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21 /* message buffer */
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22 #define DATA_PROVIDER_MSGLEN 256
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23 #define DATA_PROVIDER_MSGNUM 16
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24 static char messages[DATA_PROVIDER_MSGLEN][DATA_PROVIDER_MSGNUM];
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25 static unsigned int messageid = 0;
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26
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27 #define SendMessage(threadId, ...) \
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28 do { \
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29 char *message = messages[messageid++ % DATA_PROVIDER_MSGNUM]; \
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30 snprintf(message, DATA_PROVIDER_MSGLEN - 1, ##__VA_ARGS__); \
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31 PostDeferredCallToThread(MessageCB, message, threadId); \
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32 } while (0)
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33
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34 #endif