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_lwp_wait (2)
  • >> _lwp_wait (2) ( Solaris man: Системные вызовы )
  • 
    NAME
         _lwp_wait - wait for a LWP to terminate
    
    SYNOPSIS
         #include <sys/lwp.h>
    
         int _lwp_wait(lwpid_t wait_for, lwpid_t *departed_lwp);
    
    DESCRIPTION
         The _lwp_wait() function blocks the current  LWP  until  the
         LWP  specified  by wait_for terminates. If the specified LWP
         terminated  prior  to  the   call   to   _lwp_wait(),   then
         _lwp_wait()  returns  immediately. If wait_for is NULL, then
         _lwp_wait() waits for any undetached LWP in the current pro-
         cess. If wait_for is not NULL, then it must specify an unde-
         tached LWP in the current process. If  departed_lwp  is  not
         NULL,  then it points to location where the ID of the exited
         LWP is stored (see _lwp_exit(2)).
    
         When an LWP exits and there are one or  more  LWPs  in  this
         process  waiting  for this specific LWP to exit, then one of
         the  waiting  LWPs  is  unblocked  and   it   returns   from
         _lwp_wait()  successfully.  Any  other LWPs waiting for this
         same LWP to exit are also unblocked,  however,  they  return
         from _lwp_wait() with an error (ESRCH) indicating the waited
         for LWP no longer exists. If there are no LWPs in this  pro-
         cess  waiting  for  this specific LWP  to exit but there are
         one or more LWPs waiting for any LWP to exit,  then  one  of
         the   waiting   LWPs   is  unblocked  and  it  returns  from
         _lwp_wait() successfully.
    
         The ID  of  an  LWP  that  has  exited  may  be  reused  via
         _lwp_create()  after  the  LWP  has been successfully waited
         for.
    
    RETURN VALUES
         Upon successful completion, 0 is returned. A non-zero  value
         indicates an error.
    
    ERRORS
         If any of the following conditions are detected, _lwp_wait()
         fails and returns the corresponding value:
    
         EINTR The _lwp_wait() function was interrupted by a signal.
    
         EDEADLK
               All LWPs in this process would be blocked waiting  for
               LWPs to terminate, or the calling LWP is attempting to
               wait for itself.
    
         If any of the following conditions occur, _lwp_wait()  fails
         and returns the corresponding value:
         ESRCH The wait_for argument cannot be found in  the  current
               process or it was detached.
    
    SEE ALSO
         _lwp_create(2), _lwp_exit(2)
    
    
    
    


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