Digest for comp.programming.threads@googlegroups.com - 6 updates in 3 topics

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• He is the exception - 1 Update
• cmsg cancel <n5rr16$k24$3@dont-email.me> - 3 Updates
• Here is a third proof that C++ and C are bad - 2 Updates

He is the exception

Ramine <ramine@1.1>: Dec 28 12:54PM -0800 Hello,     Here is the exception that you can catch in FreePascal if you compile with the -Co option:     try   except on EIntOverflow do HandleIntOverflow; end;     And that's better than C++ and C, because on a more complex realtime safety critical systems if you forget to test the overflow or underflow you can risk more , but in FreePascal you can also catch the EIntOverflow exception and this exception works for both signed and unsigned 32 bit or 64 bit variables for multiplication division and add etc. and that's better than C++ and C.       Thank you, Amine Moulay Ramdane.

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cmsg cancel <n5rr16$k24$3@dont-email.me>

bleachbot <bleachbot@httrack.com>: Dec 28 06:23PM +0100

bleachbot <bleachbot@httrack.com>: Dec 28 06:42PM +0100

bleachbot <bleachbot@httrack.com>: Dec 28 06:54PM +0100

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Here is a third proof that C++ and C are bad

Ramine <ramine@1.1>: Dec 28 12:23PM -0800 Hello,     How can you test for signed int overflow..   Here is how you can do it in C and C++:   === #include <limits.h> int a = <something>; int x = <something>; if ((x > 0) && (a > INT_MAX - x)) /* `a + x` would overflow */; if ((x < 0) && (a < INT_MIN - x)) /* `a + x` would underflow */; /* ... same thing for subtraction, multiplication, and division */ ===     But notice with me that this method in C and C++ is not acceptable for realtime safety critical systems, because on a more complex software for realtime safety critical systems, you can forget to test for overflow of the integer and this can have a bad consequence and even a catastrophe, so C++ and C are bad.   But with the Delphi mode of the FreePascal compiler you can do this:   Compile with -Cr(for range checking) and compile with -Co(for Integer overflow checking), so even if on a more complex software for realtime safety critical system you have forgot to test for for overflow of a signed int or an unsigned integer , you can effectively catch the exception of the overflow signed int or unsigned int with a Try Except End; in the Delphi mode of FreePascal if you compile block with -Cr and -Co, and that's better in FreePascal for realtime safety critical systems, note also that i have just tested FreePascal with -Co and it works for both overflow of a signed int or an unsigned int.       Thank you, Amine Moulay Ramdane.

Ramine <ramine@1.1>: Dec 28 12:42PM -0800 Hello,     I have just tested -Co compiler option of the FreePascal compiler, it will throw an exception that you can catch from the software for both overflow and underflow.     Thank you, Amine Moulay Ramdane.

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