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/ IRIX Base Documentation 2001 May / SGI IRIX Base Documentation 2001 May.iso / usr / share / catman / p_man / catD / WR.z / WR
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Text File  |  1998-10-30  |  4.7 KB  |  132 lines
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  4. WWWWRRRR((((DDDD3333))))                                                                  WWWWRRRR((((DDDD3333))))
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  8. NNNNAAAAMMMMEEEE
  9.      _WWWW_RRRR - get a pointer to the write queue
  10.  
  11. SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
  12.      _####_iiii_nnnn_cccc_llll_uuuu_dddd_eeee _<<<<_ssss_yyyy_ssss_////_ssss_tttt_rrrr_eeee_aaaa_mmmm_...._hhhh_>>>>
  13.      _####_iiii_nnnn_cccc_llll_uuuu_dddd_eeee _<<<<_ssss_yyyy_ssss_////_dddd_dddd_iiii_...._hhhh_>>>>
  14.      _qqqq_uuuu_eeee_uuuu_eeee______tttt _****_WWWW_RRRR_((((_qqqq_uuuu_eeee_uuuu_eeee______tttt _****_q_))))_;;;;
  15.  
  16.    AAAArrrrgggguuuummmmeeeennnnttttssss
  17.      _q         Pointer to the queue whose write queue is to be returned.
  18.  
  19. DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
  20.      The _WWWW_RRRR function accepts a queue pointer as an argument and returns a
  21.      pointer to the write queue of the same module.
  22.  
  23.    RRRReeeettttuuuurrrrnnnn VVVVaaaalllluuuueeeessss
  24.      The pointer to the write queue.
  25.  
  26. UUUUSSSSAAAAGGGGEEEE
  27.      Note that when _WWWW_RRRR is passed a write queue pointer as an argument, it
  28.      returns a pointer to this write queue.
  29.  
  30.    LLLLeeeevvvveeeellll
  31.      Base or Interrupt.
  32.  
  33.    SSSSyyyynnnncccchhhhrrrroooonnnniiiizzzzaaaattttiiiioooonnnn CCCCoooonnnnssssttttrrrraaaaiiiinnnnttttssss
  34.      Does not sleep.
  35.  
  36.      Driver-defined basic locks, read/write locks, and sleep locks may be held
  37.      across calls to this function.
  38.  
  39.    EEEExxxxaaaammmmpppplllleeeessss
  40.      In a STREAMS _oooo_pppp_eeee_nnnn(D2) routine, the driver or module is passed a pointer
  41.      to the read queue.  The driver or module can store a pointer to a private
  42.      data structure in the _qqqq______pppp_tttt_rrrr field of both the read and write queues if it
  43.      needs to identify the data structures from its _pppp_uuuu_tttt(D2) or _ssss_rrrr_vvvv(D2)
  44.      routines.
  45.  
  46.       _1111  _eeee_xxxx_tttt_eeee_rrrr_nnnn _ssss_tttt_rrrr_uuuu_cccc_tttt _xxxx_xxxx_xxxx______dddd_eeee_vvvv_[[[[_]]]]_;;;;
  47.          _...._...._....
  48.       _2222  _xxxx_xxxx_xxxx_oooo_pppp_eeee_nnnn_((((_qqqq_uuuu_eeee_uuuu_eeee______tttt _****_qqqq_,,,, _dddd_eeee_vvvv______tttt _****_dddd_eeee_vvvv_pppp_,,,, _iiii_nnnn_tttt _ffff_llll_aaaa_gggg_,,,, _iiii_nnnn_tttt _ssss_ffff_llll_aaaa_gggg_,,,, _cccc_rrrr_eeee_dddd______tttt _****_cccc_rrrr_pppp_))))
  49.       _3333  _{{{{
  50.           _...._...._....
  51.       _3333   _qqqq_----_>>>>_qqqq______pppp_tttt_rrrr _==== _((((_cccc_aaaa_dddd_dddd_rrrr______tttt_))))_&&&&_xxxx_xxxx_xxxx______dddd_eeee_vvvv_[[[[_gggg_eeee_tttt_mmmm_iiii_nnnn_oooo_rrrr_((((_****_dddd_eeee_vvvv_pppp_))))_]]]]_;;;;
  52.       _4444   _WWWW_RRRR_((((_qqqq_))))_----_>>>>_qqqq______pppp_tttt_rrrr _==== _((((_cccc_aaaa_dddd_dddd_rrrr______tttt_))))_&&&&_xxxx_xxxx_xxxx______dddd_eeee_vvvv_[[[[_gggg_eeee_tttt_mmmm_iiii_nnnn_oooo_rrrr_((((_****_dddd_eeee_vvvv_pppp_))))_]]]]_;;;;
  53.           _...._...._....
  54.       _5555  _}}}}
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  62.                                                                         PPPPaaaaggggeeee 1111
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  69. WWWWRRRR((((DDDD3333))))                                                                  WWWWRRRR((((DDDD3333))))
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  73. REFERENCES
  74.      _OOOO_TTTT_HHHH_EEEE_RRRR_QQQQ(D3), _RRRR_DDDD(D3)
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  128.                                                                         PPPPaaaaggggeeee 2222
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