2004-01-23 Michael Koch <konqueror@gmx.de>

	* java/io/FileDescriptor.java
	(lock): New method.
	(tryLock): New method.
	(unlock): New method.
	* java/io/natFileDescriptorEcos.cc
	(lock): New method.
	(tryLock): New method.
	(unlock): New method.
	* java/io/natFileDescriptorPosix.cc
	(lock): New method.
	(tryLock): New method.
	(unlock): New method.
	* java/io/natFileDescriptorWin32.cc
	(lock): New method.
	(tryLock): New method.
	(unlock): New method.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@76421 138bc75d-0d04-0410-961f-82ee72b054a4

4 files changed, 91 insertions, 0 deletions

diff --git a/libjava/java/io/FileDescriptor.java b/libjava/java/io/FileDescriptor.java
index b713e1bf688..109d2468783 100644
--- a/libjava/java/io/FileDescriptor.java
+++ b/libjava/java/io/FileDescriptor.java
@@ -208,6 +208,10 @@ public final class FileDescriptor
   native long getLength() throws IOException;
   native void setLength(long pos) throws IOException;
 
+  native void lock(long pos, int len, boolean shared) throws IOException;
+  native boolean tryLock(long pos, int lent, boolean shared) throws IOException;
+  native void unlock(long pos, int len) throws IOException;
+
   // When collected, close.
   protected void finalize() throws Throwable
   {
diff --git a/libjava/java/io/natFileDescriptorEcos.cc b/libjava/java/io/natFileDescriptorEcos.cc
index 2f879128fff..66713079a86 100644
--- a/libjava/java/io/natFileDescriptorEcos.cc
+++ b/libjava/java/io/natFileDescriptorEcos.cc
@@ -136,3 +136,24 @@ java::io::FileDescriptor::available (void)
 {
   return 0;
 }
+
+void
+java::io::FileDescriptor::lock (jlong pos, jint len, jboolean shared)
+{
+  throw new IOException (JvNewStringLatin1
+    ("java.io.FileDescriptor.lock() not implemented"));
+}
+
+jboolean
+java::io::FileDescriptor::tryLock (jlong pos, jint len, jboolean shared)
+{
+  throw new IOException (JvNewStringLatin1
+    ("java.io.FileDescriptor.tryLock() not implemented"));
+}
+
+void
+java::io::FileDescriptor::unlock (jlong pos, jint len)
+{
+  throw new IOException (JvNewStringLatin1
+    ("java.io.FileDescriptor.unlock() not implemented"));
+}
diff --git a/libjava/java/io/natFileDescriptorPosix.cc b/libjava/java/io/natFileDescriptorPosix.cc
index e43bb9d1135..7c36669d27f 100644
--- a/libjava/java/io/natFileDescriptorPosix.cc
+++ b/libjava/java/io/natFileDescriptorPosix.cc
@@ -13,6 +13,7 @@ details.  */
 #include "posix.h"
 
 #include <errno.h>
+#include <fcntl.h>
 #include <stdio.h>
 #include <string.h>
 #include <sys/stat.h>
@@ -420,3 +421,47 @@ java::io::FileDescriptor::available (void)
   return 0;
 #endif
 }
+
+void
+java::io::FileDescriptor::lock (jlong pos, jint len, jboolean shared)
+{
+  struct flock lockdata;
+
+  lockdata.l_type = shared ? F_WRLCK : F_RDLCK;
+  lockdata.l_whence = SEEK_SET;
+  lockdata.l_start = pos;
+  lockdata.l_len = len;
+
+  if (::fcntl (fd, F_SETLK, &lockdata) == -1)
+    throw new IOException (JvNewStringLatin1 (strerror (errno)));
+}
+
+jboolean
+java::io::FileDescriptor::tryLock (jlong pos, jint len, jboolean shared)
+{
+  struct flock lockdata;
+
+  lockdata.l_type = shared ? F_WRLCK : F_RDLCK;
+  lockdata.l_whence = SEEK_SET;
+  lockdata.l_start = pos;
+  lockdata.l_len = len;
+
+  if (::fcntl (fd, F_GETLK, &lockdata) == -1)
+    throw new IOException (JvNewStringLatin1 (strerror (errno)));
+
+  return lockdata.l_type == F_UNLCK;
+}
+
+void
+java::io::FileDescriptor::unlock (jlong pos, jint len)
+{
+  struct flock lockdata;
+
+  lockdata.l_type = F_UNLCK;
+  lockdata.l_whence = SEEK_SET;
+  lockdata.l_start = pos;
+  lockdata.l_len = len;
+
+  if (::fcntl (fd, F_SETLK, &lockdata) == -1)
+    throw new IOException (JvNewStringLatin1 (strerror (errno)));
+}
diff --git a/libjava/java/io/natFileDescriptorWin32.cc b/libjava/java/io/natFileDescriptorWin32.cc
index 7811a73f493..fd9d9755e69 100644
--- a/libjava/java/io/natFileDescriptorWin32.cc
+++ b/libjava/java/io/natFileDescriptorWin32.cc
@@ -350,3 +350,24 @@ java::io::FileDescriptor::available(void)
   // FIXME:
   return getLength() - getFilePointer();
 }
+
+void
+java::io::FileDescriptor::lock (jlong pos, jint len, jboolean shared)
+{
+  throw new IOException (JvNewStringLatin1
+    ("java.io.FileDescriptor.lock() not implemented"));
+}
+
+jboolean
+java::io::FileDescriptor::tryLock (jlong pos, jint len, jboolean shared)
+{
+  throw new IOException (JvNewStringLatin1
+    ("java.io.FileDescriptor.tryLock() not implemented"));
+}
+
+void
+java::io::FileDescriptor::unlock (jlong pos, jint len)
+{
+  throw new IOException (JvNewStringLatin1
+    ("java.io.FileDescriptor.unlock() not implemented"));
+}