CODEWITHSUNDEEP
c++windowswinapiprocessthread-safety
Calvin Wu
Calvin Wu

Reputation: 142

Is CreateToolhelp32Snapshot function thread safe?

As title, I can't find any information about whether CreateToolhelp32Snapshot, Module32First and Toolhelp32ReadProcessMemory function WinAPIs is thread-safe or not.

Dose anyone know about this? Or is there any way I can figure out whether those APIs are thread-safe?

MSDN: Tool Help Functions

Upvotes: 1

Views: 319

Answers (1)

David Heffernan
David Heffernan

Reputation: 613053

Those functions are threadsafe in the following way. Multiple threads can call CreateToolhelp32Snapshot and perform separate enumerations.

On the other hand, it's not a total free for all. You cannot share a single snapshot between threads and have the threads then perform unsynchronised operations on that snapshot. In fact, it would be folly to share a snapshot between multiple threads.

Upvotes: 1

Related Questions