man/pthread_exit.3

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  33 .Dd March 15, 2014
  34 .Dt PTHREAD_EXIT 3
  35 .Os
  36 .Sh NAME
  37 .Nm pthread_exit
  38 .Nd terminate the calling thread
  39 .Sh SYNOPSIS
  40 .In pthread.h
  41 .Ft void
  42 .Fn pthread_exit "void *value_ptr"
  43 .Sh DESCRIPTION
  44 The
  45 .Fn pthread_exit
  46 function terminates the calling thread and makes the value
  47 .Fa value_ptr
  48 available to any successful join with the terminating thread.
  49 Any
  50 cancellation cleanup handlers that have been pushed and are not yet popped
  51 are popped in the reverse order that they were pushed and then executed.
  52 After all cancellation handlers have been executed, if the thread has any
  53 thread-specific data, appropriate destructor functions are called in an
  54 unspecified order.
  55 Thread termination does not release any application
  56 visible process resources, including, but not limited to, mutexes and
  57 file descriptors, nor does it perform any process level cleanup
  58 actions, including, but not limited to, calling
  59 .Fn atexit
  60 routines that may exist.
  61 .Pp
  62 An implicit call to
  63 .Fn pthread_exit
  64 is made when a thread other than the thread in which
  65 .Fn main
  66 was first invoked returns from the start routine that was used to create
  67 it.
  68 The function's return value serves as the thread's exit status.
  69 .Pp
  70 The behavior of
  71 .Fn pthread_exit
  72 is undefined if called from a cancellation handler or destructor function
  73 that was invoked as the result of an implicit or explicit call to
  74 .Fn pthread_exit .
  75 .Pp
  76 After a thread has terminated, the result of access to local (auto)
  77 variables of the thread is undefined.
  78 Thus, references to local variables
  79 of the exiting thread should not be used for the
  80 .Fn pthread_exit
  81 .Fa value_ptr
  82 parameter value.
  83 .Pp
  84 The process will exit with an exit status of 0 after the last thread has
  85 been terminated.
  86 The behavior is as if the implementation called
  87 .Fn exit
  88 with a zero argument at thread termination time.
  89 .Sh RETURN VALUES
  90 The
  91 .Fn pthread_exit
  92 function cannot return to its caller.
  93 .Sh ERRORS
  94 None.
  95 .Sh SEE ALSO
  96 .Xr _exit 2 ,
  97 .Xr exit 3 ,
  98 .Xr pthread_cancel 3 ,
  99 .Xr pthread_create 3 ,
 100 .Xr pthread_join 3
 101 .Sh STANDARDS
 102 The
 103 .Fn pthread_exit
 104 function conforms to
 105 .St -p1003.1-96 .