Jonas Maebe schrieb:
2.) Blocking access as described in 4.11 does not address execution
order.
It does guarantee that if T1 locks the mutex, changes the value, unlocks
the mutex [...]
Can you explain please, to what "changes the value" applies?
I could not find a definition of the mutex struct, to determine whether
it contains any user-alterable values. When "the value" is declared
outside the mutex struct, it will be accessible also *without* locking
the mutex first.
However I can imagine that some mutex derived *class* (TCriticalSection)
can have additional fields, that are inaccessible until some code
obtains the mutex (similar to TThreadList). Otherwise a mutex cannot
protect anything but itself.
DoDi
_______________________________________________
fpc-devel maillist - fpc-devel@lists.freepascal.org
http://lists.freepascal.org/mailman/listinfo/fpc-devel