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/ IRIX Base Documentation 2001 May / SGI IRIX Base Documentation 2001 May.iso / usr / share / catman / p_man / catD / valusema.z / valusema
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Text File  |  1998-10-30  |  2.6 KB  |  67 lines
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  4. vvvvaaaalllluuuusssseeeemmmmaaaa((((DDDD3333XXXX))))                                                    vvvvaaaalllluuuusssseeeemmmmaaaa((((DDDD3333XXXX))))
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  8. NNNNAAAAMMMMEEEE
  9.      _vvvv_aaaa_llll_uuuu_ssss_eeee_mmmm_aaaa - return the value associated with a semaphore
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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_////_ssss_eeee_mmmm_aaaa_...._hhhh_""""
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  15.      _vvvv_aaaa_llll_uuuu_ssss_eeee_mmmm_aaaa _((((_ssss_eeee_mmmm_aaaa______tttt _****_s_e_m_a_p_))))_;;;;
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  17. DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
  18.      _vvvv_aaaa_llll_uuuu_ssss_eeee_mmmm_aaaa returns a snapshot of the semaphore value associated with the
  19.      semaphore pointed to by _s_e_m_a_p. Because it performs no work, _vvvv_aaaa_llll_uuuu_ssss_eeee_mmmm_aaaa is
  20.      primarily used for assertions.
  21.  
  22.      Because the semaphore value can change immediately after the call, you
  23.      cannot use _vvvv_aaaa_llll_uuuu_ssss_eeee_mmmm_aaaa for conditional semaphore operations. For situations
  24.      where you need to do this, use _cccc_pppp_ssss_eeee_mmmm_aaaa(D3X) and _cccc_vvvv_ssss_eeee_mmmm_aaaa(D3X).
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  26.      To initialize a semaphore, call _iiii_nnnn_iiii_tttt_nnnn_ssss_eeee_mmmm_aaaa(D3X) or _iiii_nnnn_iiii_tttt_nnnn_ssss_eeee_mmmm_aaaa______mmmm_uuuu_tttt_eeee_xxxx(D3X).
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  28.    RRRReeeettttuuuurrrrnnnn VVVVaaaalllluuuueeeessss
  29.      The returned value of this function is the value of the semaphore pointed
  30.      to by the _s_e_m_a_p parameter. Of course, if you give this function a bogus
  31.      semaphore pointer, there is no telling what the function returns.
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  33.    SSSSeeeeeeee AAAAllllssssoooo
  34.      _AAAA_SSSS_SSSS_EEEE_RRRR_TTTT(D3)
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  63.                                                                         PPPPaaaaggggeeee 1111
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