/**
* Returns the thread group leader id for a currently running thread.
*
* @param tid the thread id
* @return the thread group leader id of the thread, or -1 if the thread is not running. This is
* same as what getpid(2) would return if called by tid.
* @hide
*/
public static final int getThreadGroupLeader(int tid) {
String[] procStatusLabels = {"Tgid:"};
long[] procStatusValues = new long[1];
procStatusValues[0] = -1;
Process.readProcLines("/proc/" + tid + "/status", procStatusLabels, procStatusValues);
return (int) procStatusValues[0];
}
/**
* Returns the parent process id for a currently running process.
*
* @param pid the process id
* @return the parent process id of the process, or -1 if the process is not running.
* @hide
*/
public static final int getParentPid(int pid) {
String[] procStatusLabels = {"PPid:"};
long[] procStatusValues = new long[1];
procStatusValues[0] = -1;
Process.readProcLines("/proc/" + pid + "/status", procStatusLabels, procStatusValues);
return (int) procStatusValues[0];
}