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.NET Forum / Languages / C# / August 2007By Reference
Hi, when passing by reference through multiple layers or AppDomains or outProc, servers or external domains over the web. Is it truly by Reference or at some boundaries things are marshaled and passed by Value? Lets say we are passing by Ref from server A to server B to server C etc... What is happening? Thank you, Lit > Hi, > [quoted text clipped - 7 lines] > > What is happening? Obviously you are not sending a pointer to the variable, as that would be useless on a different computer. The value of the variable is sent and a new value is returned, which is stored in the variable. Passing by reference actually doesn't have to use a pointer in any situation at all. The value of the variable is only guaranteed to be updated when the method returns, the compiler can implement this by sending the value of the variable and updating the variable on return whenever that is more efficient.  SignatureGöran Andersson _____ http://www.guffa.com Hi Goran, To be clear, so based on some compiler logic it may or may not pass a pointer at all? Does that include passing some reference to an Object also? or anything. Thanks for your input. Lit >> Hi, >> [quoted text clipped - 18 lines] > sending the value of the variable and updating the variable on return > whenever that is more efficient. > To be clear, so based on some compiler logic it may or may not pass a > pointer at all? Correct. It's only defined what the result is, not how it's implemented. > Does that include passing some reference to an Object also? or anything. Passing a reference is completely different from passing a variable by reference. If you write code to pass a reference, a reference will be passed. SignatureGöran Andersson _____ http://www.guffa.com Goran, Excellent, Thank you. Do you have a C, C++ background or -beyond? Thanks again, Lit >> To be clear, so based on some compiler logic it may or may not pass a >> pointer at all? [quoted text clipped - 6 lines] > reference. If you write code to pass a reference, a reference will be > passed. > Goran, > [quoted text clipped - 5 lines] > > Lit A have a background in Atari Basic, Compis Pascal, 6502 machine code, Comal, Pascal, C, Fortran, Cobol, GFA Basic, 68000 Assembler, Turbo Pascal, 80x86 Assembler, C++, VBScript, VB6, Javascript, C#. :) SignatureGöran Andersson _____ http://www.guffa.com Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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