What is the range of possible values that can be set for a semaphore counter?

In iOS, for semaphores, for example using DispatchSemaphore, the counter is set as an integer of type Int. The range of values depends on the Int type on the platform (usually 64-bit, i.e., from -2^63 to 2^63-1), but practically, the semaphore counter should be non-negative, as it reflects the number of available resources.

When creating a semaphore with DispatchSemaphore(value: Int), the value parameter sets the initial number of available resources. Typically, this value is >= 0. If a negative value is set, it will lead to an error or undefined behavior.

Thus, the range of possible values for the semaphore counter is non-negative integers starting from 0 up to the maximum possible Int value on the platform, but in practice, it is usually limited by the application's logic.