fixes

coroutines/src/commonMain/kotlin/dev/inmo/micro_utils/coroutines/SmartMutex.kt

@@ -50,7 +50,7 @@ sealed interface SmartMutex {
         override val lockStateFlow: StateFlow<Boolean> = _lockStateFlow.asStateFlow()
 
         private val internalChangesMutex = Mutex()
-        private val backingMutex = Mutex()
+        private val backingMutex = Mutex(locked = locked)
 
         fun immutable() = Immutable(lockStateFlow)
 

coroutines/src/commonTest/kotlin/SmartMutexTests.kt

@@ -14,6 +14,17 @@ import kotlin.test.assertTrue
 import kotlin.time.Duration.Companion.seconds
 
 class SmartMutexTests {
+    @Test
+    fun initiallyLockedMutexCanBeReleasedAndReacquired() = runTest(timeout = 5.seconds) {
+        val mutex = SmartMutex.Mutable(locked = true)
+        assertTrue(mutex.isLocked)
+        assertFalse(mutex.tryLock())
+        assertTrue(mutex.unlock())
+        assertFalse(mutex.isLocked)
+        assertTrue(mutex.tryLock())
+        assertTrue(mutex.unlock())
+    }
+
     @Test
     fun cancelledUnlockCompletesUnderContention() = runTest(timeout = 5.seconds) {
         val mutex = SmartMutex.Mutable()

coroutines/src/commonTest/kotlin/SmartRWLockerTests.kt

@@ -13,6 +13,25 @@ import kotlin.time.Duration.Companion.days
 import kotlin.time.Duration.Companion.seconds
 
 class SmartRWLockerTests {
+    @Test
+    fun initiallyWriteLockedLockerReleasesReadPermits() = runTest(timeout = 5.seconds) {
+        val locker = SmartRWLocker(readPermits = 2, writeIsLocked = true)
+        assertTrue(locker.writeMutex.isLocked)
+        assertEquals(0, locker.readSemaphore.freePermits)
+
+        assertTrue(locker.unlockWrite())
+
+        assertFalse(locker.writeMutex.isLocked)
+        assertEquals(2, locker.readSemaphore.freePermits)
+        locker.withReadAcquire {
+            assertEquals(1, locker.readSemaphore.freePermits)
+        }
+        locker.withWriteLock {
+            assertEquals(0, locker.readSemaphore.freePermits)
+        }
+        assertEquals(2, locker.readSemaphore.freePermits)
+    }
+
     @Test
     fun compositeTest() {
         val locker = SmartRWLocker()