Heaps and threads

[MarkMLl]

It's because I have not described the complete implementation of the heap manager in detail. I just gave a general overview of how the common case works. All edge cases are handled (if one of the is not, then it's a bug in the implementation and it should be reported).

OK, thanks. I'm happier with "all edge cases are covered" from you than I would be from just about anybody else.

MarkMLl

[PascalDragon]

Stop the myth with "special heap for threads". Not in free pascal. Period.

It might be that some people have seen too much Microsoft stuff. Windows and the M$ C++ compiler work with TLS - Thread Local Storage. Not free pascal.

You're wrong. FPC's heap uses threadvars to keep track of each thread's allocations and lo and behold threadvars are implemented using TLS.

[winni]

Hmm .....

I thought that was only true in case of the "evil" external threads.
Will have a look.

Winni

[PascalDragon]

Threadvars do not know about internal vs. external threads, they always use the same mechanism. The only difference is that for external threads the threadspecific parts of the RTL are initialized lazily instead of at the start of the thread.