[email protected] ha scritto:
On Wed, 25 May 2011, Giuliano Colla wrote:
[email protected] ha scritto:
On Wed, 25 May 2011, Vincent Snijders wrote:
2011/5/25 <[email protected]>:
No. You should use a TMultiReadExclusiveWriteSynchronizer object to
synchronize access to your object, or use a critical section.
Ehm, he made sure that only one thread accesses the TStringList at a
time.
To me, this is not obvious from his mail ?
I thought it was obvious from:
"The logic of the application itself made it sure that there was no
conflict whatsoever. "
But maybe that was not not what Giuliano meant by "no conflict".
This is what was not clear to me...
If no conflict can mean 'it adds only', then there is a conflict at
a lower
level, because adding can mean a reallocation of the array of strings.
The full picture is:
1) The main thread creates the String List, and doesn't touch it any
more.
2) The other thread is activated and it is the only one which appends
strings to the list.
3) When the other thread is terminated, the main thread processes the
list.
I would expect that whatever activity occurs as an effect of
appending strings (such as reallocating the array) would occur in the
context of the thread performing the action, that all pertinent
information is stored in fields of the object itself, and that the
main thread is never involved. Am I wrong on this aspect?
No, you are right. If it is designed as described above, then it should
work.
Thank you. With Kylix it didn't work, but there was no mailing list to
ask :'( .
Now I'm going to develop something similar with Lazarus, and I felt it
wise to ask, before bumping my head again against a brick wall.
Giuliano
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