Hi,
I would want to use the sqlite database in my usb-ethernet(TCP/IP)
converter. It should be utmost realtime. I would like check the state of
converter via www. I write test application, if it is usable. But I
encounter a problem.
The first process selects configuration from databases, than reads data
from my usb device and stores them into the database file. The second
process only selects the data and prints them out. The problem is in that,
that the second process doesn't "view" all changes made by the first
process.
First process psedocode:
while (true) {
c = sql("select count(*) from t1");
sql("select cfg from t1");
for (i = 0; i < c; i++) {
cfg = sql_step();
data[i] = read_usb(cfg);
}
sql_finalize(); // select
for (i = 0; i < c; i++) {
sql("begin exclusive");
sql("update t1 data");
sql_finalize(); //update
sql("commit");
}
}
Second process pseudocode:
while (true) {
sql("select data from t1");
printf(data);
sql_finalize(); // select
sql_sleep(1);
}
Thank you for your recommendations, how to optimize this concept.
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