Imports of package concurrent

PathSynopsis
internal/abi
internal/goarchpackage goarch contains GOARCH-specific constants.
math/rand/v2Package rand implements pseudo-random number generators suitable for tasks such as simulation, but it should not be used for security-sensitive work.
syncPackage sync provides basic synchronization primitives such as mutual exclusion locks.
sync/atomicPackage atomic provides low-level atomic memory primitives useful for implementing synchronization algorithms.
unsafePackage unsafe contains operations that step around the type safety of Go programs.