 | Start a set with this search |
 | Include this search in one of my sets |
 | Exclude this search from one of my sets |
 | Permalink to these results Paste this link in email or IM: |
 | Atom feed for tracking future search results Paste this URL into your reader: |
15 messages in net.java.dev.jna.usersRe: [jna-users] current java thread f...| From | Sent On | Attachments |
|---|---|---|
| Quartz | Oct 27, 2007 7:55 am | |
| Timothy Wall | Oct 27, 2007 8:14 am | |
| Quartz | Oct 27, 2007 11:10 am | |
| Timothy Wall | Oct 27, 2007 12:54 pm | |
| Quartz | Oct 28, 2007 11:03 am | |
| Quartz | Oct 28, 2007 12:44 pm | |
| Timothy Wall | Oct 28, 2007 1:44 pm | |
| Timothy Wall | Oct 28, 2007 1:49 pm | |
| Timothy Wall | Oct 28, 2007 1:55 pm | |
| Timothy Wall | Oct 28, 2007 2:30 pm | |
| Quartz | Oct 29, 2007 8:23 am | |
| Timothy Wall | Oct 29, 2007 1:56 pm | |
| Quartz | Oct 29, 2007 7:39 pm | |
| Timothy Wall | Oct 30, 2007 6:37 am | |
| Quartz | Nov 3, 2007 9:39 am |
| Permalink for this message Paste this link in email or IM: |
| Permalink for this thread Paste this link in email or IM: |
| Atom feed for this thread Paste this URL into your reader: |
| Subject: | Re: [jna-users] current java thread finding its task id yyyyy in /proc/self/task/yyyyy | Actions... |
|---|---|---|
| From: | Quartz (quar...@yahoo.com) | |
| Date: | Oct 27, 2007 11:10:22 am | |
| List: | net.java.dev.jna.users | |
Hi,
//I made an interface Pthread.java: import com.sun.jna.Library; import com.sun.jna.Native; public interface Pthread extends Library { Pthread INSTANCE = (Pthread)Native.loadLibrary("pthread", Pthread.class); int pthread_self(); }
//And them I made a simple test class:
public class TaskId {
public static void main(String[] args) throws Exception {
System.out.println("pthread_self() returned
"+Pthread.INSTANCE.pthread_self());
}
}
//Then I compiled and ran it, and got: javac -cp jna.jar *.java java -cp jna.jar:. TaskId
Exception in thread "main" java.lang.UnsatisfiedLinkError: /tmp/jna47643.tmp:
/lib/libc.so.6:
version `GLIBC_2.4' not found (required by /tmp/jna47643.tmp)
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
...
What's going on? (forgive my lack of knowlege)
--- Timothy Wall <twal...@dev.java.net> wrote:
I would guess linux uses pthreads, but you could browse the JVM source to be sure. I would imagine you might find what you're looking for in the native java.lang.Thread sources.
I'm inferring that task corresponds to thread, so if you make a pthread call to get the thread id, that might be what you're looking for.
The thread/task id might even be tucked away in a private member of a platform-specific class (this is the case with 1.6+ for AWT window handles).
On Oct 27, 2007, at 10:55 AM, Quartz wrote:
Hi,
On linux, under the jvm process of pid=xxxxx, threads usually gets listed under /proc/xxxx/tasks/*. I am trying to get the 'yyyyy' number in the proc filesystem for the current jvm thread, as in /proc/self/task/yyyyy.
As you can see, the jvm pid is not even required since there is a sym link /proc/self, but there is no such thing for the task id.
So, I don't know enough about the linux programming to drill into jni to pull this thread id. I was wondering if anyone could tell/show me the thread struct or union that describes the thread and how to pull the task id with JNA.
I hope to build an api as simple as public int LinuxThreadUtils.getProcessId(); //done: first field of content of /proc/self/stat public int LinuxThreadUtils.getCurrentThreadTaskId();//TODO
If at all possible, a bonus API would be to get the task id off the current thread, as in public int LinuxThreadUtils.getThreadTaskId(Thread t);//bonus
Thanks.
__________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
__________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com