Advanced C++ Programming Tutorial 6

Share your resources in grand style with shared_ptr.

Topics

Part 1

• Review of unique_ptr
• shared_ptr usage scenarios
• use_count
• How to pass/receive resources when shared_ptr is involved
• Comparing shared_ptrs
• Conversion from unique_ptr to shared_ptr
• Custom deleter for shared_ptr

Part 2

• weak_ptr and lock
• The control block
• Monolithic make_shared control block optimization
• Race condition and synchronization
• Resource destruction with monolithic control block
• static_pointer_cast dynamic_pointer_cast reinterpret_pointer_cast const_pointer_cast
• enable_shared_from_this

Video Timestamp Index

• Tutorial 6.1
• Tutorial 6.2

Homework

Part 1

Identify targets in the Memefighter codebase from Intermediate c++ for resource sharing, implement the sharing with std::shared_ptr, and consider/discuss potential downsides to the resource sharing for each instance of resource sharing. Solution can be found here.

Part 2

Make a simple announcing class, and then use allocate_shared in conjunction with LocalAlloc from Win32 to create an instance of that class that is managed by a shared_ptr with a monolithic control block.

See also

• Next in series (Tutorial 7)
• Advanced C++ Programming Series
• Planet Chili Patreon