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src/os/unix/ngx_posix_init.c - nginx source code

Global variables defined

Functions defined

Source code


  2. /*
  3. * Copyright (C) Igor Sysoev
  4. * Copyright (C) Nginx, Inc.
  5. */


  8. #include <ngx_config.h>
  9. #include <ngx_core.h>
  10. #include <nginx.h>


  13. ‌ngx_int_t   ngx_ncpu;
  14. ‌ngx_int_t   ngx_max_sockets;
  15. ‌ngx_uint_t  ngx_inherited_nonblocking;
  16. ‌ngx_uint_t  ngx_tcp_nodelay_and_tcp_nopush;


  19. ‌struct rlimit  rlmt;


  22. ‌ngx_os_io_t ngx_os_io = {
  23.     ngx_unix_recv,
  24.     ngx_readv_chain,
  25.     ngx_udp_unix_recv,
  26.     ngx_unix_send,
  27.     ngx_udp_unix_send,
  28.     ngx_udp_unix_sendmsg_chain,
  29.     ngx_writev_chain,
  30.     0
  31. };


  34. ngx_int_t
  35. ‌ngx_os_init(ngx_log_t *log)
  36. {
  37.     ngx_time_t  *tp;
  38.     ngx_uint_t   n;
  39. #if (NGX_HAVE_LEVEL1_DCACHE_LINESIZE)
  40.     long         size;
  41. #endif

  43. #if (NGX_HAVE_OS_SPECIFIC_INIT)
  44.     if (ngx_os_specific_init(log) != NGX_OK) {
  45.         return NGX_ERROR;
  46.     }
  47. #endif

  49.     if (ngx_init_setproctitle(log) != NGX_OK) {
  50.         return NGX_ERROR;
  51.     }

  53.     ngx_pagesize = getpagesize();

  55.     if (ngx_cacheline_size == 0) {
  56.         ngx_cacheline_size = NGX_CPU_CACHE_LINE;
  57.     }

  59.     for (n = ngx_pagesize; n >>= 1; ngx_pagesize_shift++) { /* void */ }

  61. #if (NGX_HAVE_SC_NPROCESSORS_ONLN)
  62.     if (ngx_ncpu == 0) {
  63.         ngx_ncpu = sysconf(_SC_NPROCESSORS_ONLN);
  64.     }
  65. #endif

  67.     if (ngx_ncpu < 1) {
  68.         ngx_ncpu = 1;
  69.     }

  71. #if (NGX_HAVE_LEVEL1_DCACHE_LINESIZE)
  72.     size = sysconf(_SC_LEVEL1_DCACHE_LINESIZE);
  73.     if (size > 0) {
  74.         ngx_cacheline_size = size;
  75.     }
  76. #endif

  78.     ngx_cpuinfo();

  80.     if (getrlimit(RLIMIT_NOFILE, &rlmt) == -1) {
  81.         ngx_log_error(NGX_LOG_ALERT, log, errno,
  82.                       "getrlimit(RLIMIT_NOFILE) failed");
  83.         return NGX_ERROR;
  84.     }

  86.     ngx_max_sockets = (ngx_int_t) rlmt.rlim_cur;

  88. #if (NGX_HAVE_INHERITED_NONBLOCK || NGX_HAVE_ACCEPT4)
  89.     ngx_inherited_nonblocking = 1;
  90. #else
  91.     ngx_inherited_nonblocking = 0;
  92. #endif

  94.     tp = ngx_timeofday();
  95.     srandom(((unsigned) ngx_pid << 16) ^ tp->sec ^ tp->msec);

  97.     return NGX_OK;
  98. }


  101. void
  102. ‌ngx_os_status(ngx_log_t *log)
  103. {
  104.     ngx_log_error(NGX_LOG_NOTICE, log, 0, NGINX_VER_BUILD);

  106. #ifdef NGX_COMPILER
  107.     ngx_log_error(NGX_LOG_NOTICE, log, 0, "built by " NGX_COMPILER);
  108. #endif

  110. #if (NGX_HAVE_OS_SPECIFIC_INIT)
  111.     ngx_os_specific_status(log);
  112. #endif

  114.     ngx_log_error(NGX_LOG_NOTICE, log, 0,
  115.                   "getrlimit(RLIMIT_NOFILE): %r:%r",
  116.                   rlmt.rlim_cur, rlmt.rlim_max);
  117. }


  120. #if 0

  122. ngx_int_t
  123. ngx_posix_post_conf_init(ngx_log_t *log)
  124. {
  125.     ngx_fd_t  pp[2];

  127.     if (pipe(pp) == -1) {
  128.         ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "pipe() failed");
  129.         return NGX_ERROR;
  130.     }

  132.     if (dup2(pp[1], STDERR_FILENO) == -1) {
  133.         ngx_log_error(NGX_LOG_EMERG, log, errno, "dup2(STDERR) failed");
  134.         return NGX_ERROR;
  135.     }

  137.     if (pp[1] > STDERR_FILENO) {
  138.         if (close(pp[1]) == -1) {
  139.             ngx_log_error(NGX_LOG_EMERG, log, errno, "close() failed");
  140.             return NGX_ERROR;
  141.         }
  142.     }

  144.     return NGX_OK;
  145. }

  147. #endif

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