am 50d11ded: Merge "Reimplement LocalSocket methods using android.system.Os"

* commit '50d11ded0d219ea9b128557080e4ffd49ebea5ab':
  Reimplement LocalSocket methods using android.system.Os

core/java/android/net/LocalSocketImpl.java

@@ -27,6 +27,7 @@ import android.system.Os;
 import android.system.OsConstants;
 import android.system.StructLinger;
 import android.system.StructTimeval;
+import android.util.MutableInt;
 
 /**
  * Socket implementation used for android.net.LocalSocket and
@@ -61,7 +62,13 @@ class LocalSocketImpl
             FileDescriptor myFd = fd;
             if (myFd == null) throw new IOException("socket closed");
 
-            return available_native(myFd);
+            MutableInt avail = new MutableInt(0);
+            try {
+                Os.ioctlInt(myFd, OsConstants.FIONREAD, avail);
+            } catch (ErrnoException e) {
+                throw e.rethrowAsIOException();
+            }
+            return avail.value;
         }
 
         /** {@inheritDoc} */
@@ -158,18 +165,31 @@ class LocalSocketImpl
         public void flush() throws IOException {
             FileDescriptor myFd = fd;
             if (myFd == null) throw new IOException("socket closed");
-            while(pending_native(myFd) > 0) {
+
+            // Loop until the output buffer is empty.
+            MutableInt pending = new MutableInt(0);
+            while (true) {
+                try {
+                    // See linux/net/unix/af_unix.c
+                    Os.ioctlInt(myFd, OsConstants.TIOCOUTQ, pending);
+                } catch (ErrnoException e) {
+                    throw e.rethrowAsIOException();
+                }
+
+                if (pending.value <= 0) {
+                    // The output buffer is empty.
+                    break;
+                }
+
                 try {
                     Thread.sleep(10);
                 } catch (InterruptedException ie) {
-                    return;
+                    break;
                 }
             }
         }
     }
 
-    private native int pending_native(FileDescriptor fd) throws IOException;
-    private native int available_native(FileDescriptor fd) throws IOException;
     private native int read_native(FileDescriptor fd) throws IOException;
     private native int readba_native(byte[] b, int off, int len,
             FileDescriptor fd) throws IOException;

core/jni/android_net_LocalSocketImpl.cpp

@@ -199,80 +199,6 @@ socket_shutdown (JNIEnv *env, jobject object, jobject fileDescriptor,
     }
 }
 
-static jint socket_pending (JNIEnv *env, jobject object,
-        jobject fileDescriptor)
-{
-    int fd;
-
-    fd = jniGetFDFromFileDescriptor(env, fileDescriptor);
-
-    if (env->ExceptionCheck()) {
-        return (jint)-1;
-    }
-
-    int pending;
-    int ret = ioctl(fd, TIOCOUTQ, &pending);
-
-    // If this were a non-socket fd, there would be other cases to worry
-    // about...
-
-    //ALOGD("socket_pending, ioctl ret:%d, pending:%d", ret, pending);
-    if (ret < 0) {
-        jniThrowIOException(env, errno);
-        return (jint) 0;
-    }
-
-    return (jint)pending;
-}
-static jint socket_available (JNIEnv *env, jobject object,
-        jobject fileDescriptor)
-{
-    int fd;
-
-    fd = jniGetFDFromFileDescriptor(env, fileDescriptor);
-
-    if (env->ExceptionCheck()) {
-        return (jint)-1;
-    }
-
-#if 1
-    int avail;
-    int ret = ioctl(fd, FIONREAD, &avail);
-
-    // If this were a non-socket fd, there would be other cases to worry
-    // about...
-
-    if (ret < 0) {
-        jniThrowIOException(env, errno);
-        return (jint) 0;
-    }
-
-    return (jint)avail;
-#else
-// there appears to be a bionic bug that prevents this version from working.
-
-    ssize_t ret;
-    struct msghdr msg;
-
-    memset(&msg, 0, sizeof(msg));
-
-    do {
-        ret = recvmsg(fd, &msg, MSG_PEEK | MSG_DONTWAIT | MSG_NOSIGNAL);
-    } while (ret < 0 && errno == EINTR);
-
-
-    // MSG_PEEK returns 0 on EOF and EWOULDBLOCK on none available
-    if (ret < 0 && errno == EWOULDBLOCK) {
-        return 0;
-    } if (ret < 0) {
-        jniThrowIOException(env, errno);
-        return -1;
-    }
-
-    return (jint)ret;
-#endif
-}
-
 /**
  * Processes ancillary data, handling only
  * SCM_RIGHTS. Creates appropriate objects and sets appropriate
@@ -664,8 +590,6 @@ static JNINativeMethod gMethods[] = {
     {"listen_native", "(Ljava/io/FileDescriptor;I)V", (void*)socket_listen},
     {"accept", "(Ljava/io/FileDescriptor;Landroid/net/LocalSocketImpl;)Ljava/io/FileDescriptor;", (void*)socket_accept},
     {"shutdown", "(Ljava/io/FileDescriptor;Z)V", (void*)socket_shutdown},
-    {"available_native", "(Ljava/io/FileDescriptor;)I", (void*) socket_available},
-    {"pending_native", "(Ljava/io/FileDescriptor;)I", (void*) socket_pending},
     {"read_native", "(Ljava/io/FileDescriptor;)I", (void*) socket_read},
     {"readba_native", "([BIILjava/io/FileDescriptor;)I", (void*) socket_readba},
     {"writeba_native", "([BIILjava/io/FileDescriptor;)V", (void*) socket_writeba},