title: syscall() to call tkill()
body: <p><strong>Hello</strong></p>
  
  <p>is it safe to send <em>signal</em> to each thread of the process using <em>tkill()</em> linux kernel call? 
  as it is not directly exposed, i call it using <em>syscall().</em></p>
  
  <p>i am refering to the link - &lt;<a href="http://linux.die.net/man/2/tkill" rel="nofollow">http://linux.die.net/man/2/tkill</a>>.</p>
  
  <p>but i dont know whether i should do certain <strong>check prior</strong> to the call (like state check or lock mutex etc..)?</p>
  
  <p>Thanks
  Sandeep</p>