man/pthread_key_delete.3

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  33 .Dd April 4, 1996
  34 .Dt PTHREAD_KEY_DELETE 3
  35 .Os
  36 .Sh NAME
  37 .Nm pthread_key_delete
  38 .Nd delete a thread-specific data key
  39 .Sh SYNOPSIS
  40 .Fd #include <pthread.h>
  41 .Ft int
  42 .Fo pthread_key_delete
  43 .Fa "pthread_key_t key"
  44 .Fc
  45 .Sh DESCRIPTION
  46 The
  47 .Fn pthread_key_delete
  48 function deletes a thread-specific data key, previously returned by
  49 .Fn pthread_key_create .
  50 The thread-specific data values associated with
  51 .Fa key
  52 need not be NULL at the time that
  53 .Fn pthread_key_delete
  54 is called.
  55 It is the responsibility of the application to free any
  56 application storage or perform any cleanup actions for data structures
  57 related to the deleted key or associated thread-specific data in any threads;
  58 this cleanup can be done either before or after
  59 .Fn pthread_key_delete
  60 is called.
  61 Any attempt to use
  62 .Fa key
  63 following the call to
  64 .Fn pthread_key_delete
  65 results in undefined behavior.
  66 .Pp
  67 The
  68 .Fn pthread_key_delete
  69 function is callable from within destructor functions.
  70 Destructor functions
  71 are not invoked by
  72 .Fn pthread_key_delete .
  73 Any destructor function that may have been associated with
  74 .Fa key
  75 will no longer be called upon thread exit.
  76 .Sh RETURN VALUES
  77 If successful, the
  78 .Fn pthread_key_delete
  79 function will return zero.
  80 Otherwise, an error number will be returned to
  81 indicate the error.
  82 .Sh ERRORS
  83 .Fn pthread_key_delete
  84 will fail if:
  85 .Bl -tag -width Er
  86 .It Bq Er EINVAL
  87 The
  88 .Fa key
  89 value is invalid.
  90 .El
  91 .Sh SEE ALSO
  92 .Xr pthread_getspecific 3 ,
  93 .Xr pthread_key_create 3 ,
  94 .Xr pthread_setspecific 3
  95 .Sh STANDARDS
  96 .Fn pthread_key_delete
  97 conforms to
  98 .St -p1003.1-96 .