pthreads/pthread_exit.3

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  33 .Dd April 4, 1996
  34 .Dt PTHREAD_EXIT 3
  35 .Os
  36 .Sh NAME
  37 .Nm pthread_exit
  38 .Nd terminate the calling thread
  39 .Sh SYNOPSIS
  40 .Fd #include <pthread.h>
  41 .Ft void
  42 .Fo pthread_exit
  43 .Fa "void *value_ptr"
  44 .Fc
  45 .Sh DESCRIPTION
  46 The
  47 .Fn pthread_exit
  48 function terminates the calling thread and makes the value
  49 .Fa value_ptr
  50 available to any successful join with the terminating thread.
  51 Any
  52 cancellation cleanup handlers that have been pushed and are not yet popped
  53 are popped in the reverse order that they were pushed and then executed.
  54 After all cancellation handlers have been executed, if the thread has any
  55 thread-specific data, appropriate destructor functions are called in an
  56 unspecified order.
  57 Thread termination does not release any application
  58 visible process resources, including, but not limited to, mutexes and
  59 file descriptors, nor does it perform any process level cleanup
  60 actions, including, but not limited to, calling
  61 .Fn atexit
  62 routines that may exist.
  63 .Pp
  64 An implicit call to
  65 .Fn pthread_exit
  66 is made when a thread other than the thread in which
  67 .Fn main
  68 was first invoked returns from the start routine that was used to create
  69 it. The function's return value serves as the thread's exit status.
  70 .Pp
  71 The behavior of
  72 .Fn pthread_exit
  73 is undefined if called from a cancellation handler or destructor function
  74 that was invoked as the result of an implicit or explicit call to
  75 .Fn pthread_exit .
  76 .Pp
  77 After a thread has terminated, the result of access to local (auto)
  78 variables of the thread is undefined.
  79 Thus, references to local variables
  80 of the exiting thread should not be used for the
  81 .Fn pthread_exit
  82 .Fa value_ptr
  83 parameter value.
  84 .Pp
  85 The process will exit with an exit status of 0 after the last thread has
  86 been terminated.
  87 The behavior is as if the implementation called
  88 .Fn exit
  89 with a zero argument at thread termination time.
  90 .Sh RETURN VALUES
  91 The
  92 .Fn pthread_exit
  93 function cannot return to its caller.
  94 .Sh ERRORS
  95 None.
  96 .Sh SEE ALSO
  97 .Xr _exit 2 ,
  98 .Xr exit 3 ,
  99 .Xr pthread_create 3 ,
 100 .Xr pthread_join 3
 101 .Sh STANDARDS
 102 .Fn pthread_exit
 103 conforms to
 104 .St -p1003.1-96 .