das questions

das answers

• Does every custom GCD queue need an autorelease pool under ARC?
• What happens if dispatch_main gets called from outside of the main thread?
• Wait for Asynchronous Operations in Objective-C
• How to detect the type of dispatch queue (serial or concurrent)?
• Crash in libdispatch _dispatch_semaphore_wait_slow
• lvalue argument for dispatch_semaphore_create ?
• Issue with GCD and too many threads
• How to determine if a dispatch semaphore is being waited on?
• Most efficient way to copy a file with GCD?
• Is it safe to schedule and invalidate NSTimers on a GCD serial queue?