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

Browse source 
* 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.

From-SVN: r76421
This commit is contained in:
Michael Koch 2004-01-23 14:07:28 +00:00 • committed by Michael Koch
parent 0e707673d2
commit ca1d829f31
5 changed files with 110 additions and 0 deletions
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45
libjava/java/io/natFileDescriptorPosix.cc
View file

@ -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)));
}