WebbContrary to (some) conventional wisdom, shared_ptr objects are themselves not thread-safe. That is, you cannot concurrently manipulate 1 a single shared_ptr object on … Webb12 juli 2008 · Effects: Constructs a shared_ptr that shares ownership with r and stores a copy of the pointer stored in r. Postconditions: use_count () == r.use_count (). Throws: …

std::atomic - cppreference.com

Webbscore:22 Accepted answer No, swap isn't thread safe, but there's another function that is: atomic_store (&global, sp); There's also atomic_exchange which returns the old value, if … Webb13 nov. 2024 · A shared pointer is a pair of two pointers, one to the object and one to a control block (holding the ref counter, links to weak pointers …). There can be multiple … or 1074

[Solved] Fully thread-safe shared_ptr implementation

WebbShared_ptr sp1 (new Foo); // The ref_count.ptr type is Foo * shared_ptr sp2 = sp1; // It can be assigned a value and is automatically transformed up to cast) sp1.reset … WebbThere can be multiple std::shared_ptr and whenever they access the control block to change the reference counter it's thread-safe but the std::shared_ptr itself is NOT thread … Webb8 nov. 2024 · It uses a mutex to ensure it's not called from multiple threads. The versions of those atomic functions that work for std::shared_ptr aren't supported in gcc-4.8 All … or 103844