Mercurial > hg > nginx-quic
annotate src/os/unix/ngx_errno.c @ 5115:a29c574d61fa
Status: introduced the "ngx_stat_waiting" counter.
And corresponding variable $connections_waiting was added.
Previously, waiting connections were counted as the difference between
active connections and the sum of reading and writing connections.
That made it impossible to count more than one request in one connection
as reading or writing (as is the case for SPDY).
Also, we no longer count connections in handshake state as waiting.
author | Valentin Bartenev <vbart@nginx.com> |
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date | Fri, 15 Mar 2013 20:00:49 +0000 |
parents | f1a0de6eb505 |
children | 8cc5b0365ee5 |
rev | line source |
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441
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
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5 */ |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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12 /* |
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13 * The strerror() messages are copied because: |
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14 * |
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15 * 1) strerror() and strerror_r() functions are not Async-Signal-Safe, |
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16 * therefore, they cannot be used in signal handlers; |
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17 * |
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18 * 2) a direct sys_errlist[] array may be used instead of these functions, |
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19 * but Linux linker warns about its usage: |
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20 * |
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21 * warning: `sys_errlist' is deprecated; use `strerror' or `strerror_r' instead |
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22 * warning: `sys_nerr' is deprecated; use `strerror' or `strerror_r' instead |
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23 * |
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24 * causing false bug reports. |
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25 */ |
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26 |
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27 |
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28 static ngx_str_t *ngx_sys_errlist; |
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29 static ngx_str_t ngx_unknown_error = ngx_string("Unknown error"); |
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30 |
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31 |
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32 u_char * |
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33 ngx_strerror(ngx_err_t err, u_char *errstr, size_t size) |
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34 { |
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35 ngx_str_t *msg; |
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36 |
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37 msg = ((ngx_uint_t) err < NGX_SYS_NERR) ? &ngx_sys_errlist[err]: |
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38 &ngx_unknown_error; |
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39 size = ngx_min(size, msg->len); |
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40 |
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41 return ngx_cpymem(errstr, msg->data, size); |
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42 } |
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43 |
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44 |
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45 ngx_int_t |
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46 ngx_strerror_init(void) |
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47 { |
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48 char *msg; |
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49 u_char *p; |
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50 size_t len; |
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51 ngx_err_t err; |
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52 |
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53 /* |
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54 * ngx_strerror() is not ready to work at this stage, therefore, |
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55 * malloc() is used and possible errors are logged using strerror(). |
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56 */ |
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57 |
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58 len = NGX_SYS_NERR * sizeof(ngx_str_t); |
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59 |
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60 ngx_sys_errlist = malloc(len); |
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61 if (ngx_sys_errlist == NULL) { |
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62 goto failed; |
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63 } |
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64 |
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65 for (err = 0; err < NGX_SYS_NERR; err++) { |
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66 msg = strerror(err); |
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67 len = ngx_strlen(msg); |
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68 |
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69 p = malloc(len); |
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70 if (p == NULL) { |
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71 goto failed; |
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72 } |
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73 |
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74 ngx_memcpy(p, msg, len); |
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75 ngx_sys_errlist[err].len = len; |
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76 ngx_sys_errlist[err].data = p; |
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77 } |
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78 |
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79 return NGX_OK; |
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80 |
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81 failed: |
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83 err = errno; |
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84 ngx_log_stderr(0, "malloc(%uz) failed (%d: %s)", len, err, strerror(err)); |
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85 |
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86 return NGX_ERROR; |
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87 } |