[ новости /+++ | форум | теги | ]

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)

Партнёры:

Хостинг: