Native async

src/main/java/org/scalasbt/ipcsocket/JNIUnixDomainSocketLibraryProvider.java

@@ -46,10 +46,12 @@ public int shutdown(int fd, int how) throws NativeErrorException {
 
   public int available(int fd) throws NativeErrorException {
     int result = availableNative(fd);
-    if (result < 0) {
-      return returnOrThrow(pollReadNative(fd, 0), 0);
+    if (result >= 0) {
+      return result;
+    } else if (pollRead(fd, 0)) {
+      return 1;
     } else {
-      return returnOrThrow(result, 0);
+      return 0;
     }
   }
 

src/main/java/org/scalasbt/ipcsocket/SocketChannels.java

@@ -99,14 +99,8 @@ public static String readLine(SocketChannel channel, int readTimeoutMillis) thro
             numOfKeys = sel.select(readTimeoutMillis);
           }
         } else {
-          if (readTimeoutMillis > 0) {
-            if (ServerSocketChannels.isWin) {
-              if (channel.supportedOptions().contains(SO_TIMEOUT)) {
-                channel.setOption(SO_TIMEOUT, Integer.valueOf(readTimeoutMillis));
-              }
-            } else {
-              throw new IOException("timeout requires JDK 17 or Windows");
-            }
+          if (channel.supportedOptions().contains(SO_TIMEOUT)) {
+            channel.setOption(SO_TIMEOUT, Integer.valueOf(readTimeoutMillis));
           }
         }
         if (numOfKeys == 0) {
@@ -152,17 +146,14 @@ public static ByteBuffer readAll(SocketChannel channel, int readTimeoutMillis)
             numOfKeys = sel.select(readTimeoutMillis);
           }
         } else {
-          if (readTimeoutMillis > 0) {
-            // The following operation gets blocked on JDK 8
-            // channel.register(sel, SelectionKey.OP_READ);
-            // numOfKeys = sel.select(readTimeoutMillis);
-            if (ServerSocketChannels.isWin) {
-              if (channel.supportedOptions().contains(SO_TIMEOUT)) {
-                channel.setOption(SO_TIMEOUT, Integer.valueOf(readTimeoutMillis));
-              }
-            } else {
-              throw new IOException("timeout requires JDK 17 or Windows");
-            }
+          // if (readTimeoutMillis > 0) {
+          //   throw new IOException("timeout requires JDK 17 and non-Windows");
+          // }
+          // The following operation gets blocked on JDK 8
+          // channel.register(sel, SelectionKey.OP_READ);
+          // numOfKeys = sel.select(readTimeoutMilis);
+          if (channel.supportedOptions().contains(SO_TIMEOUT)) {
+            channel.setOption(SO_TIMEOUT, Integer.valueOf(readTimeoutMillis));
           }
         }
         if (numOfKeys == 0) {

src/main/java/org/scalasbt/ipcsocket/UnixDomainSocket.java

@@ -24,6 +24,7 @@
 import java.nio.ByteBuffer;
 
 import java.net.Socket;
+import java.net.SocketTimeoutException;
 
 import java.util.concurrent.atomic.AtomicInteger;
 
@@ -137,7 +138,7 @@ public int available() throws IOException {
     public int read() throws IOException {
       byte[] buf = new byte[1];
       int result;
-      if (doRead(buf, 0, 1) == 0) {
+      if (doRead(buf, 0, 1, getSoTimeout()) == 0) {
         result = -1;
       } else {
         // Make sure to & with 0xFF to avoid sign extension
@@ -152,7 +153,7 @@ public int read(byte[] b, int off, int len) throws IOException {
       }
       int socketFd = fd.acquire();
       try {
-        int result = doRead(b, off, len);
+        int result = doRead(b, off, len, getSoTimeout());
         if (result == 0) {
           try {
             provider.close(socketFd);
@@ -168,12 +169,17 @@ public int read(byte[] b, int off, int len) throws IOException {
       }
     }
 
-    private int doRead(byte[] buf, int offset, int len) throws IOException {
+    private int doRead(byte[] buf, int offset, int len, int timeoutMillis) throws IOException {
       try {
         int fdToRead = fd.acquire();
         if (fdToRead == -1) {
           return -1;
         }
+        if (timeoutMillis > 0) {
+          if (!provider.pollRead(fdToRead, timeoutMillis)) {
+            throw new SocketTimeoutException("read timed out");
+          }
+        }
         return provider.read(fdToRead, buf, offset, len);
       } catch (NativeErrorException e) {
         throw new IOException(e);

src/test/java/org/scalasbt/ipcsocket/SocketChannelTest.java

@@ -14,30 +14,26 @@ static boolean isJava17Plus() {
     return SocketChannels.isJava17Plus();
   }
 
-  /** Test the non-blocking echo server using JDK 17 Unix Domain Socket. */
+  /** Test the non-blocking echo server. */
   @Test
   public void testNonBlockingEchoServer() throws IOException, InterruptedException {
     System.out.println(
         "SocketChannelTest#testNonBlockingEchoServer(" + Boolean.toString(useJNI()) + ")");
     withSocket(
         sock -> {
-          if (isJava17Plus() || ServerSocketChannels.isWin) {
-            String line = nonBlockingEchoServerTest(sock, 100, 600);
-            assertEquals("echo did not return the content", "hello", line);
-          }
+          String line = nonBlockingEchoServerTest(sock, 100, 600);
+          assertEquals("echo did not return the content", "hello", line);
         });
   }
 
-  /** Test the non-blocking echo server using JDK 17 Unix Domain Socket. */
+  /** Test the non-blocking echo server. */
   @Test
   public void testTimeout() throws IOException, InterruptedException {
     System.out.println("SocketChannelTest#testTimeout(" + Boolean.toString(useJNI()) + ")");
     withSocket(
         sock -> {
-          if (isJava17Plus() || ServerSocketChannels.isWin) {
-            String line = nonBlockingEchoServerTest(sock, 6000, 600);
-            assertEquals("echo did not timeout", "<unavailable>", line);
-          }
+          String line = nonBlockingEchoServerTest(sock, 6000, 600);
+          assertEquals("echo did not timeout", "<unavailable>", line);
         });
   }