Multiple threads reading an object?
BlitzMax Forums/BlitzMax Programming/Multiple threads reading an object?
| ||
| I know you need to prevent a thread from reading an object while it's being modified (hence the mutex locking). But can multiple threads read an object at the same time safely? i.e. can 2 threads loop through a list at the same time as long as neither of them changes anything. Doesn't seem to be crashing for me, but I don't know if it's safe moving forward or if it's just luck... the docs would imply you have to lock things to safely access them in any way. |
| ||
| You can safely do reads from multiple threads. If you are smart about it, you can sometimes avoid locking even in cases that require writes. Lock when unsure, though. |
| ||
| thanks otus, glad I'm not just getting super lucky here. |
| ||
| I agree with Jan, "reading" from memory locations is never a problem, it is "writing" to them which may cause problems (unfortunately, "writing" may often succeed and rarely fail (i.e. produce invalid results instead of crashing) which makes it difficult to isolate the problems - as these may become appearant somewhere else in the code) |
   |