Mercurial > hg > nginx
annotate src/os/unix/ngx_shared.c @ 444:42d11f017717
nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 29 Sep 2004 16:00:49 +0000 |
parents | da8c5707af39 |
children | a88a3e4e158f |
rev | line source |
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441
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nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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1 |
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2 /* |
444
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3 * Copyright (C) Igor Sysoev |
441
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4 */ |
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5 |
358
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6 |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 |
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10 |
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11 #if (HAVE_MAP_ANON) |
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12 |
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13 void *ngx_create_shared_memory(size_t size, ngx_log_t *log) |
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14 { |
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15 void *p; |
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16 |
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17 p = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_ANON|MAP_SHARED, -1, 0); |
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18 |
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19 if (p == MAP_FAILED) { |
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20 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, |
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21 "mmap(MAP_ANON|MAP_SHARED, " SIZE_T_FMT ") failed", |
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22 size); |
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23 return NULL; |
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24 } |
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25 |
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26 return p; |
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27 } |
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28 |
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29 #elif (HAVE_MAP_DEVZERO) |
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30 |
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31 void *ngx_create_shared_memory(size_t size, ngx_log_t *log) |
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32 { |
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33 void *p; |
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34 ngx_fd_t fd; |
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35 |
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36 fd = open("/dev/zero", O_RDWR); |
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37 |
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38 if (fd == -1) { |
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39 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, |
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40 "open(/dev/zero) failed"); |
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41 return NULL; |
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42 } |
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43 |
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44 p = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); |
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45 |
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46 if (p == MAP_FAILED) { |
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47 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, |
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48 "mmap(/dev/zero, MAP_SHARED, " SIZE_T_FMT ") failed", |
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49 size); |
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50 p = NULL; |
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51 } |
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52 |
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53 if (close(fd) == -1) { |
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54 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "close() failed"); |
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55 } |
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56 |
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57 return p; |
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58 } |
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59 |
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60 #elif (HAVE_SYSVSHM) |
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61 |
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62 #include <sys/ipc.h> |
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63 #include <sys/shm.h> |
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64 |
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65 |
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66 void *ngx_create_shared_memory(size_t size, ngx_log_t *log) |
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67 { |
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68 int id; |
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69 void *p; |
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70 |
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71 id = shmget(IPC_PRIVATE, size, (SHM_R|SHM_W|IPC_CREAT)); |
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72 |
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73 if (id == -1) { |
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74 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, |
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75 "shmget(" SIZE_T_FMT ") failed", size); |
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76 return NULL; |
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77 } |
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78 |
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79 ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, "shmget id: %d", id); |
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80 |
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81 p = shmat(id, NULL, 0); |
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82 |
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83 if (p == (void *) -1) { |
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84 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "shmat() failed"); |
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85 p = NULL; |
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86 } |
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87 |
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88 if (shmctl(id, IPC_RMID, NULL) == -1) { |
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89 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "shmctl(IPC_RMID) failed"); |
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90 p = NULL; |
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91 } |
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92 |
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93 return p; |
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94 } |
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95 |
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96 #endif |