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annotate src/os/win32/ngx_shmem.c @ 2904:474a9daf8c80

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*) fix memory leak in successful case *) log shared memory name in failure case
author Igor Sysoev <igor@sysoev.ru>
date Tue, 02 Jun 2009 13:56:42 +0000
parents beb0707ed8ab
children d620f497c50f
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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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 ngx_int_t
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12 ngx_shm_alloc(ngx_shm_t *shm)
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13 {
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14 u_char *name;
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15 uint64_t size;
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17 name = ngx_alloc(shm->name.len + 2 + sizeof(NGX_INT32_LEN), shm->log);
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18 if (name == NULL) {
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19 return NGX_ERROR;
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20 }
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21
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22 (void) ngx_sprintf(name, "%V_%s%Z", &shm->name, ngx_unique);
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23
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24 ngx_set_errno(0);
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25
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26 size = shm->size;
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27
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28 shm->handle = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE,
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29 (u_long) (size >> 32),
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30 (u_long) (size & 0xffffffff),
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31 (char *) name);
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32
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33 if (shm->handle == NULL) {
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34 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
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35 "CreateFileMapping(%uz, %s) failed",
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36 shm->size, name);
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37 ngx_free(name);
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38
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39 return NGX_ERROR;
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40 }
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41
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42 ngx_free(name);
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43
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44 if (ngx_errno == ERROR_ALREADY_EXISTS) {
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45 shm->exists = 1;
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46 }
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47
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48 shm->addr = MapViewOfFile(shm->handle, FILE_MAP_WRITE, 0, 0, 0);
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49
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50 if (shm->addr != NULL) {
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51 return NGX_OK;
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52 }
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53
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54 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
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55 "MapViewOfFile(%uz) of file mapping \"%V\" failed",
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56 shm->size, &shm->name);
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57
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58 if (CloseHandle(shm->handle) == 0) {
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59 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
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60 "CloseHandle() of file mapping \"%V\" failed",
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61 &shm->name);
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62 }
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63
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64 return NGX_ERROR;
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65 }
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68 void
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69 ngx_shm_free(ngx_shm_t *shm)
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70 {
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71 if (UnmapViewOfFile(shm->addr) == 0) {
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72 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
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73 "UnmapViewOfFile(%p) of file mapping \"%V\" failed",
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74 shm->addr, &shm->name);
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75 }
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76
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77 if (CloseHandle(shm->handle) == 0) {
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78 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno,
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79 "CloseHandle() of file mapping \"%V\" failed",
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80 &shm->name);
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81 }
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82 }