fun release()

in kotlinx-coroutines-core/common/src/sync/Semaphore.kt [242:262]

• 11 lines of code
• 5 McCabe index (conditional complexity)

    fun release() {
        while (true) {
            // Increment the number of available permits.
            val p = _availablePermits.getAndIncrement()
            // Is this `release` call correct and does not
            // exceed the maximal number of permits?
            if (p >= permits) {
                // Revert the number of available permits
                // back to the correct one and fail with error.
                coerceAvailablePermitsAtMaximum()
                error("The number of released permits cannot be greater than $permits")
            }
            // Is there a waiter that should be resumed?
            if (p >= 0) return
            // Try to resume the first waiter, and
            // restart the operation if either this
            // first waiter is cancelled or
            // due to `SYNC` resumption mode.
            if (tryResumeNextFromQueue()) return
        }
    }