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/ IRIX Base Documentation 2001 May / SGI IRIX Base Documentation 2001 May.iso / usr / share / catman / p_man / catD / RW_ALLOC.z / RW_ALLOC
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Text File  |  1998-10-30  |  5.4 KB  |  132 lines
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  4. RRRRWWWW____AAAALLLLLLLLOOOOCCCC((((DDDD3333))))                                                      RRRRWWWW____AAAALLLLLLLLOOOOCCCC((((DDDD3333))))
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  8. NNNNAAAAMMMMEEEE
  9.      _RRRR_WWWW______AAAA_LLLL_LLLL_OOOO_CCCC, _RRRR_WWWW______IIII_NNNN_IIII_TTTT - reader/writer lock initialization
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  11. SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
  12.      _####_iiii_nnnn_cccc_llll_uuuu_dddd_eeee _<<<<_ssss_yyyy_ssss_////_tttt_yyyy_pppp_eeee_ssss_...._hhhh_>>>>
  13.      _####_iiii_nnnn_cccc_llll_uuuu_dddd_eeee _<<<<_ssss_yyyy_ssss_////_kkkk_mmmm_eeee_mmmm_...._hhhh_>>>>
  14.      _####_iiii_nnnn_cccc_llll_uuuu_dddd_eeee _<<<<_ssss_yyyy_ssss_////_kkkk_ssss_yyyy_nnnn_cccc_hhhh_...._hhhh_>>>>
  15.      _####_iiii_nnnn_cccc_llll_uuuu_dddd_eeee _<<<<_ssss_yyyy_ssss_////_dddd_dddd_iiii_...._hhhh_>>>>
  16.      _ssss_llll_eeee_eeee_pppp______tttt _****_RRRR_WWWW______AAAA_LLLL_LLLL_OOOO_CCCC_((((_cccc_hhhh_aaaa_rrrr _****_n_a_m_e, int _f_l_a_g);
  17.  
  18.      void RW_INIT(rwlock_t *lockp, char *_n_a_m_e);
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  20.    AAAArrrrgggguuuummmmeeeennnnttttssss
  21.      _l_o_c_k_p     Pointer to uninitialized reader/writer lock.
  22.  
  23.      _n_a_m_e      Name applied to reader/writer lock when metering locks are
  24.                installed.
  25.  
  26.      _f_l_a_g      Specifies whether the caller is willing to sleep waiting for
  27.                memory.
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  29. DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
  30.      _RRRR_WWWW______AAAA_LLLL_LLLL_OOOO_CCCC dynamically allocates and initializes an instance of a
  31.      reader/writer lock.  _RRRR_WWWW______IIII_NNNN_IIII_TTTT initializes an instance of a reader/writer
  32.      lock.  The lock is initialized to the unlocked state.
  33.  
  34.      If _f_l_a_g is set to _KKKK_MMMM______SSSS_LLLL_EEEE_EEEE_PPPP, the caller will sleep if necessary until
  35.      sufficient memory is available.  If _f_l_a_g is set to _KKKK_MMMM______NNNN_OOOO_SSSS_LLLL_EEEE_EEEE_PPPP, the caller
  36.      will not sleep, but _RRRR_WWWW______AAAA_LLLL_LLLL_OOOO_CCCC will return _NNNN_UUUU_LLLL_LLLL if sufficient memory is not
  37.      immediately available.
  38.  
  39.    RRRReeeettttuuuurrrrnnnn VVVVaaaalllluuuueeeessss
  40.      Upon successful completion, _RRRR_WWWW______AAAA_LLLL_LLLL_OOOO_CCCC returns a pointer to the newly
  41.      allocated lock.  If _KKKK_MMMM______NNNN_OOOO_SSSS_LLLL_EEEE_EEEE_PPPP is specified and sufficient memory is not
  42.      immediately available, _RRRR_WWWW______AAAA_LLLL_LLLL_OOOO_CCCC returns a _NNNN_UUUU_LLLL_LLLL pointer.
  43.  
  44. UUUUSSSSAAAAGGGGEEEE
  45.    LLLLeeeevvvveeeellll
  46.      Base or Initialization.
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  48.    SSSSyyyynnnncccchhhhrrrroooonnnniiiizzzzaaaattttiiiioooonnnn CCCCoooonnnnssssttttrrrraaaaiiiinnnnttttssss
  49.      May sleep if flag is set to _KKKK_MMMM______SSSS_LLLL_EEEE_EEEE_PPPP.
  50.  
  51.      Driver-defined basic locks and sleeping locks may be held across calls to
  52.      this function if _f_l_a_g is _KKKK_MMMM______NNNN_OOOO_SSSS_LLLL_EEEE_EEEE_PPPP but may not be held if _f_l_a_g is
  53.      _KKKK_MMMM______SSSS_LLLL_EEEE_EEEE_PPPP.
  54.  
  55.      Driver-defined sleeping locks may be held across calls to this function
  56.      regardless of the value of _f_l_a_g.
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  62.                                                                         PPPPaaaaggggeeee 1111
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  69. RRRRWWWW____AAAALLLLLLLLOOOOCCCC((((DDDD3333))))                                                      RRRRWWWW____AAAALLLLLLLLOOOOCCCC((((DDDD3333))))
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  73. RRRREEEEFFFFEEEERRRREEEENNNNCCCCEEEESSSS
  74.      _RRRR_WWWW______DDDD_EEEE_AAAA_LLLL_LLLL_OOOO_CCCC(D3), _RRRR_WWWW______DDDD_EEEE_SSSS_TTTT_RRRR_OOOO_YYYY(D3), _RRRR_WWWW______RRRR_DDDD_LLLL_OOOO_CCCC_KKKK(D3), _RRRR_WWWW______WWWW_RRRR_LLLL_OOOO_CCCC_KKKK(D3),
  75.      _RRRR_WWWW______TTTT_RRRR_YYYY_RRRR_DDDD_LLLL_OOOO_CCCC_KKKK(D3), _RRRR_WWWW______TTTT_RRRR_YYYY_WWWW_RRRR_LLLL_OOOO_CCCC_KKKK(D3), _RRRR_WWWW______UUUU_NNNN_LLLL_OOOO_CCCC_KKKK(D3)
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  128.                                                                         PPPPaaaaggggeeee 2222
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