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Delphi string thread safe

WebMay 4, 2024 · Regarding the string, that could be a problem if you are casting from a regular Delphi string. Delphi strings are reference counted, so by the time your message handler tries to access the string, it may have been deallocated. It might be a good idea to allocate the string yourself with StrNew. – Dangph May 3, 2024 at 5:43 Thanks for the idea. WebOct 31, 2015 · How i can pass pchar from the DLL? dll must be compatible with other apps, not just delphi. In help is written that it is dangerous to pass pointers to local variables, if we make this variable global, the code will not be thread-safe. We can safely pass a wide string,but in this case, the dll will not be compatible with other (non-Delphi) apps.

Passing PChar from the Delphi DLL - Stack Overflow

WebMay 14, 2013 · Use one Logging thread that dequeues the TStringList instances, writes them to the file and then frees them. This isolates the log writes from disk/network delays, removes any reliance on dodgy file-locking and will actually work reliably. Share Improve this answer Follow answered May 14, 2013 at 13:13 Martin James 24.3k 3 35 58 http://www.delphigroups.info/2/04/521955.html pack of animals names https://cortediartu.com

4. Concurrent Programming - Delphi in a Nutshell [Book]

WebDec 2, 2024 · Is OutputDebugString (PAnsiChar ('')); thread safe? I/we have been using it in threads for debugging, and it never occurred to me if I should be doing it a different way. (Delphi 7) multithreading delphi delphi-7 outputdebugstring Share Improve this question Follow edited Dec 2, 2024 at 22:49 Peter Mortensen 31k 21 105 126 WebFeb 20, 2024 · Yes, then FPass will be guaranteed to point to a long string heap object of refcount 1. – Andreas Rejbrand Feb 20, 2024 at 13:27 2 If there is no writing after multiple threads start accessing the data, then reading is thread safe. But your question would be more clear if you have added some code. Webprocedure TThreadStringList.SetValues(const Name: string; S: string); begin LockList; try FStringList.Values[Name] := S; finally UnlockList; end; end; function … jerome moments spa lotion yellow

multithreading - Implement thread-safe logging - Stack Overflow

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Delphi string thread safe

Are Delphi simple types thread safe? - Stack Overflow

WebJan 20, 2024 · "This is part of a class helper for TStream" - My code is also from a class helper of my own :) Though I was pretty sure it will not work with Delphi 2010 unless I change the string to AnsiString (which I just did recently). Though, I am not really interested in saving UNICOE, I admit, I will update my code (using yours) to support UNICODE. …

Delphi string thread safe

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WebAug 22, 2024 · Even in Delphi 7 string reference counting is thread safe. The relevant code is in LStrAsg from system.pas, which also in Delphi 7 uses locks for that. Your problems must have had other reasons. Note: manipulating the string variables is not thread safe out of itself, but the string instances that these variables reference are. – … WebSep 29, 2013 · In addition to the fact that you are posting a local variable, the TWinControl.Handle property is not thread-safe, either. You should use the TApplication.Handle property instead, or use AllocateHWnd () to create your own window.

WebMay 18, 2024 · Before calling the thread-safe form of Format, you must populate AFormatSettings with localization information. To populate AFormatSettings with a set of … WebOct 20, 2011 · The standard doesn't guarantee anything about threads. So to do anything with threads in C++, you have to rely on implementation-defined guarantees. And Then you can safely use std::string because each implementation tells you whether or not it is safe to use in a threaded environment.

WebSep 13, 2003 · string type was made thread safe in D5. If I look at the system unit, there are comments throughout the code about thread safe reference counting. However we have been getting random access violations in our application in the system unit that implements the long string functions. _LstrAsg, _LstrClr etc. I wrote a simple test case as follows WebMay 31, 2024 · About Delphi Thread Safety Patterns. While the thread safety of a particular piece of code depends on the surrounding context and how it is used, some …

WebAug 27, 2024 · Newer Delphi versions come with CodeSite. SmartInspect is another alternative. Use synchronization primitives to make your class thread-safe: TCriticalSection, TMREWSync Make sure you understand the issues involved in multithreading and synchronization before attempting to write a thread-safe logging framework.

WebAug 16, 2024 · To add to Barry's answer: It is definitely thread-safe if the string that got passed came from a local variable inside the callers scope. In that case that local variable will hold a valid reference and the only way (assuming just valid pascal code, no fiddling around in asm) for that local variable to be changed is if your call returns. jerome morisseau bank of americaWebJul 9, 2013 · First by using the busy loop David refers to, second by causing lots of additional and unnecessary thread context switches. Get rid of the thread, create a simple thread-safe log queue, and have it post a single message to the GUI thread when the first item is added to the queue. jerome mooney attorneyWebFeb 19, 2015 · Add that string pointer into a global or parent-global TList or TThreadList depending on whether you have thread-safe ways of accessing the TList or not. Depending on when you want to sort I would sort the list either as soon as the thread changes its string in its string pointer or do the sort after many threads' string pointers have changed ... pack of aprons