Mercurial > hg > nginx
annotate src/event/ngx_event_spinlock.c @ 366:e411b1482ee3
nginx-0.0.7-2004-06-23-19:18:17 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 23 Jun 2004 15:18:17 +0000 |
parents | f2755a2885c8 |
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f2755a2885c8
nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
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1 |
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nginx-0.0.7-2004-06-21-23:22:53 import
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nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
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3 void _spinlock(ngx_atomic_t *lock) |
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nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
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4 { |
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nginx-0.0.7-2004-06-21-23:22:53 import
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5 ngx_int_t tries; |
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nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
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6 |
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nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
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7 tries = 0; |
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nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
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8 |
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nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
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9 for ( ;; ) { |
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nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
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nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
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11 if (*lock) { |
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nginx-0.0.7-2004-06-21-23:22:53 import
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12 if (ngx_ncpu > 1 && tries++ < 1000) { |
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13 continue; |
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nginx-0.0.7-2004-06-21-23:22:53 import
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14 } |
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nginx-0.0.7-2004-06-21-23:22:53 import
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15 |
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nginx-0.0.7-2004-06-21-23:22:53 import
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16 sched_yield(); |
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nginx-0.0.7-2004-06-21-23:22:53 import
Igor Sysoev <igor@sysoev.ru>
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17 tries = 0; |
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18 |
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nginx-0.0.7-2004-06-21-23:22:53 import
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19 } else { |
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nginx-0.0.7-2004-06-21-23:22:53 import
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20 if (ngx_atomic_cmp_set(lock, 0, 1)) { |
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21 return; |
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22 } |
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23 } |
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24 } |
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25 } |
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26 |