| 1 | /*************************************************************************** |
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| 2 | * sh.dataMemoryShared.cc |
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| 3 | * |
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| 4 | * Wed Nov 21 2007 |
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| 5 | * Copyright 2007 Dmytro Milinevskyy |
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| 6 | * milinevskyy@gmail.com |
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| 7 | ****************************************************************************/ |
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| 8 | |
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| 9 | /* |
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| 10 | * This program is free software; you can redistribute it and/or modify |
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| 11 | * it under the terms of the GNU Lesser General Public License version 2.1 as published by |
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| 12 | * the Free Software Foundation; |
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| 13 | * |
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| 14 | * This program is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | * GNU Library General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU Lesser General Public License |
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| 20 | * along with this program; if not, write to the Free Software |
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| 21 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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| 22 | */ |
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| 23 | |
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| 24 | /** |
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| 25 | * vim indentation settings |
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| 26 | * set tabstop=4 |
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| 27 | * set shiftwidth=4 |
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| 28 | */ |
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| 29 | |
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| 30 | #include <libdodo/directives.h> |
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| 31 | |
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| 32 | #include <sys/types.h> |
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| 33 | #include <sys/mman.h> |
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| 34 | #include <sys/stat.h> |
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| 35 | #include <string.h> |
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| 36 | #ifdef XSI_IPC |
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| 37 | #include <sys/ipc.h> |
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| 38 | #include <sys/shm.h> |
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| 39 | #endif |
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| 40 | #include <fcntl.h> |
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| 41 | #include <errno.h> |
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| 42 | #include <unistd.h> |
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| 43 | |
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| 44 | #include <libdodo/dataMemoryShared.h> |
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| 45 | #include <libdodo/toolsMisc.h> |
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| 46 | #include <libdodo/types.h> |
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| 47 | #include <libdodo/toolsCode.h> |
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| 48 | #include <libdodo/dataMemorySharedEx.h> |
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| 49 | |
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| 50 | namespace dodo { |
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| 51 | namespace data { |
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| 52 | namespace memory { |
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| 53 | /** |
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| 54 | * @struct __key__ |
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| 55 | * @brief defines shared memory key |
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| 56 | */ |
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| 57 | struct __key__ { |
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| 58 | #ifdef XSI_IPC |
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| 59 | int key; ///< key for the shared sh.data |
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| 60 | #else |
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| 61 | dodo::string key; ///< key for the shared sh.data |
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| 62 | #endif |
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| 63 | }; |
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| 64 | }; |
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| 65 | }; |
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| 66 | }; |
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| 67 | |
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| 68 | using namespace dodo::data::memory; |
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| 69 | |
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| 70 | shared::__shared__::__shared__(void *data) : data(data) |
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| 71 | { |
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| 72 | } |
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| 73 | |
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| 74 | //------------------------------------------------------------------- |
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| 75 | |
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| 76 | shared::__shared__::__shared__() : data(NULL) |
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| 77 | { |
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| 78 | } |
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| 79 | |
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| 80 | //------------------------------------------------------------------- |
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| 81 | |
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| 82 | shared::shared(shared &) |
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| 83 | { |
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| 84 | } |
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| 85 | |
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| 86 | //------------------------------------------------------------------- |
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| 87 | |
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| 88 | shared::shared() : handle(-1), |
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| 89 | sh(NULL), |
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| 90 | key(new __key__), |
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| 91 | autogenerated(false) |
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| 92 | { |
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| 93 | #ifndef XSI_IPC |
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| 94 | sh.size = 0; |
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| 95 | #endif |
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| 96 | } |
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| 97 | |
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| 98 | //------------------------------------------------------------------- |
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| 99 | |
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| 100 | shared::shared(int a_key) : handle(-1), |
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| 101 | sh(NULL), |
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| 102 | key(new __key__), |
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| 103 | autogenerated(false) |
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| 104 | { |
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| 105 | #ifndef XSI_IPC |
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| 106 | sh.size = 0; |
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| 107 | #endif |
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| 108 | |
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| 109 | #ifdef XSI_IPC |
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| 110 | if (a_key == 0) { |
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| 111 | key->key = tools::misc::random<int>(); |
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| 112 | |
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| 113 | autogenerated = true; |
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| 114 | } else { |
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| 115 | key->key = a_key; |
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| 116 | } |
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| 117 | #else |
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| 118 | #ifdef __FreeBSD__ |
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| 119 | key->key = "/tmp/"; |
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| 120 | #else |
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| 121 | key->key = "/"; |
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| 122 | #endif |
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| 123 | |
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| 124 | if (a_key == 0) { |
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| 125 | char _key[SH_KEY_SIZE / 2 - 1]; |
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| 126 | tools::misc::randomBlob(_key, SH_KEY_SIZE / 2 - 1); |
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| 127 | |
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| 128 | key->key += dodo::string(tools::code::binToHex(dodo::string(_key, SH_KEY_SIZE / 2 - 1))); |
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| 129 | |
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| 130 | autogenerated = true; |
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| 131 | } else { |
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| 132 | char _key[4]; |
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| 133 | memcpy(_key, &a_key, 4); |
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| 134 | |
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| 135 | key->key += dodo::string(tools::code::binToHex(dodo::string(_key, 4))); |
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| 136 | } |
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| 137 | |
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| 138 | handle = shm_open(key->key.data(), O_CREAT | O_RDWR, S_IRUSR | S_IWUSR); |
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| 139 | if (handle == -1) { |
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| 140 | delete key; |
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| 141 | |
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| 142 | dodo_throw exception::basic(exception::MODULE_DATAMEMORYSHARED, SHAREDEX_SHARED, exception::ERRNO_ERRNO, errno, strerror(errno), __LINE__, __FILE__); |
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| 143 | } |
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| 144 | #endif |
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| 145 | } |
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| 146 | |
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| 147 | //------------------------------------------------------------------- |
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| 148 | |
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| 149 | shared::~shared() |
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| 150 | { |
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| 151 | #ifdef XSI_IPC |
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| 152 | if (handle != -1 && autogenerated) |
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| 153 | shmctl(handle, IPC_RMID, NULL); |
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| 154 | |
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| 155 | #else |
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| 156 | if (handle != -1) { |
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| 157 | if (sh.data != NULL) |
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| 158 | munmap(sh.data, sh.size); |
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| 159 | |
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| 160 | if (autogenerated) |
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| 161 | shm_unlink(key->key.data()); |
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| 162 | } |
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| 163 | #endif |
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| 164 | |
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| 165 | delete key; |
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| 166 | } |
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| 167 | |
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| 168 | //------------------------------------------------------------------- |
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| 169 | |
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| 170 | void |
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| 171 | shared::open(int a_key) const |
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| 172 | { |
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| 173 | close(); |
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| 174 | |
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| 175 | #ifdef XSI_IPC |
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| 176 | if (a_key == 0) { |
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| 177 | key->key = tools::misc::random<int>(); |
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| 178 | |
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| 179 | autogenerated = true; |
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| 180 | } else { |
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| 181 | key->key = a_key; |
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| 182 | } |
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| 183 | #else |
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| 184 | #ifdef __FreeBSD__ |
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| 185 | key->key = "/tmp/"; |
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| 186 | #else |
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| 187 | key->key = "/"; |
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| 188 | #endif |
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| 189 | |
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| 190 | if (a_key == 0) { |
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| 191 | char _key[SH_KEY_SIZE / 2 - 1]; |
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| 192 | tools::misc::randomBlob(_key, SH_KEY_SIZE / 2 - 1); |
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| 193 | |
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| 194 | key->key += dodo::string(tools::code::binToHex(dodo::string(_key, SH_KEY_SIZE / 2 - 1))); |
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| 195 | |
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| 196 | autogenerated = true; |
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| 197 | } else { |
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| 198 | char _key[4]; |
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| 199 | memcpy(_key, &a_key, 4); |
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| 200 | |
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| 201 | key->key += dodo::string(tools::code::binToHex(dodo::string(_key, 4))); |
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| 202 | } |
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| 203 | |
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| 204 | handle = shm_open(key->key.data(), O_CREAT | O_RDWR, S_IRUSR | S_IWUSR); |
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| 205 | if (handle == -1) |
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| 206 | dodo_throw exception::basic(exception::MODULE_DATAMEMORYSHARED, SHAREDEX_OPEN, exception::ERRNO_ERRNO, errno, strerror(errno), __LINE__, __FILE__); |
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| 207 | |
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| 208 | #endif |
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| 209 | } |
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| 210 | |
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| 211 | //------------------------------------------------------------------- |
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| 212 | |
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| 213 | void |
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| 214 | shared::close() const |
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| 215 | { |
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| 216 | #ifdef XSI_IPC |
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| 217 | if (handle != -1 && autogenerated) |
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| 218 | if (shmctl(handle, IPC_RMID, NULL) == -1) |
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| 219 | dodo_throw exception::basic(exception::MODULE_DATAMEMORYSHARED, SHAREDEX_CLOSE, exception::ERRNO_ERRNO, errno, strerror(errno), __LINE__, __FILE__); |
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| 220 | |
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| 221 | #else |
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| 222 | if (handle != -1) { |
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| 223 | if (sh.data != NULL) |
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| 224 | if (munmap(sh.data, sh.size) == -1) |
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| 225 | dodo_throw exception::basic(exception::MODULE_DATAMEMORYSHARED, SHAREDEX_CLOSE, exception::ERRNO_ERRNO, errno, strerror(errno), __LINE__, __FILE__); |
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| 226 | |
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| 227 | if (autogenerated) |
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| 228 | if (shm_unlink(key->key.data()) == -1) |
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| 229 | dodo_throw exception::basic(exception::MODULE_DATAMEMORYSHARED, SHAREDEX_CLOSE, exception::ERRNO_ERRNO, errno, strerror(errno), __LINE__, __FILE__); |
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| 230 | } |
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| 231 | #endif |
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| 232 | } |
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| 233 | |
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| 234 | //------------------------------------------------------------------- |
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| 235 | |
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| 236 | void |
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| 237 | shared::remove(int a_key) |
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| 238 | { |
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| 239 | #ifdef XSI_IPC |
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| 240 | int handle = shmget(a_key, 0, S_IRUSR | S_IWUSR); |
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| 241 | if (handle == -1) |
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| 242 | dodo_throw exception::basic(exception::MODULE_DATAMEMORYSHARED, SHAREDEX_REMOVE, exception::ERRNO_ERRNO, errno, strerror(errno), __LINE__, __FILE__); |
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| 243 | |
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| 244 | if (shmctl(handle, IPC_RMID, NULL) == -1) |
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| 245 | dodo_throw exception::basic(exception::MODULE_DATAMEMORYSHARED, SHAREDEX_REMOVE, exception::ERRNO_ERRNO, errno, strerror(errno), __LINE__, __FILE__); |
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| 246 | |
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| 247 | #else |
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| 248 | #ifdef __FreeBSD__ |
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| 249 | dodo::string key = "/tmp/"; |
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| 250 | #else |
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| 251 | dodo::string key = "/"; |
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| 252 | #endif |
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| 253 | |
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| 254 | char _key[4]; |
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| 255 | memcpy(_key, &a_key, 4); |
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| 256 | |
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| 257 | key += dodo::string(tools::code::binToHex(dodo::string(_key, 4))); |
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| 258 | |
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| 259 | if (shm_unlink(key.data()) == -1) |
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| 260 | dodo_throw exception::basic(exception::MODULE_DATAMEMORYSHARED, SHAREDEX_REMOVE, exception::ERRNO_ERRNO, errno, strerror(errno), __LINE__, __FILE__); |
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| 261 | |
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| 262 | #endif |
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| 263 | } |
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| 264 | |
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| 265 | //------------------------------------------------------------------- |
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| 266 | |
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| 267 | void * |
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| 268 | shared::map(unsigned long a_size) const |
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| 269 | { |
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| 270 | unmap(); |
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| 271 | |
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| 272 | #ifdef XSI_IPC |
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| 273 | if (a_size == 0) { |
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| 274 | handle = shmget(key->key, 0, S_IRUSR | S_IWUSR); |
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| 275 | if (handle == -1) |
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| 276 | dodo_throw exception::basic(exception::MODULE_DATAMEMORYSHARED, SHAREDEX_MAP, exception::ERRNO_ERRNO, errno, strerror(errno), __LINE__, __FILE__); |
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| 277 | } else { |
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| 278 | handle = shmget(key->key, a_size, IPC_CREAT | S_IRUSR | S_IWUSR); |
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| 279 | if (handle == -1) |
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| 280 | dodo_throw exception::basic(exception::MODULE_DATAMEMORYSHARED, SHAREDEX_MAP, exception::ERRNO_ERRNO, errno, strerror(errno), __LINE__, __FILE__); |
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| 281 | } |
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| 282 | |
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| 283 | sh.data = shmat(handle, NULL, 0); |
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| 284 | if (sh.data == (void *)-1) { |
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| 285 | sh.data = NULL; |
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| 286 | |
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| 287 | dodo_throw exception::basic(exception::MODULE_DATAMEMORYSHARED, SHAREDEX_MAP, exception::ERRNO_ERRNO, errno, strerror(errno), __LINE__, __FILE__); |
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| 288 | } |
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| 289 | #else |
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| 290 | if (a_size == 0) { |
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| 291 | struct stat st; |
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| 292 | |
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| 293 | if (fstat(handle, &st) == -1) |
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| 294 | dodo_throw exception::basic(exception::MODULE_DATAMEMORYSHARED, SHAREDEX_MAP, exception::ERRNO_ERRNO, errno, strerror(errno), __LINE__, __FILE__); |
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| 295 | |
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| 296 | sh.size = st.st_size; |
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| 297 | } else { |
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| 298 | sh.size = a_size; |
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| 299 | } |
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| 300 | |
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| 301 | if (ftruncate(handle, sh.size) != 0) |
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| 302 | dodo_throw exception::basic(exception::MODULE_DATAMEMORYSHARED, SHAREDEX_MAP, exception::ERRNO_ERRNO, errno, strerror(errno), __LINE__, __FILE__); |
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| 303 | |
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| 304 | sh.data = mmap(NULL, sh.size, PROT_READ | PROT_WRITE, MAP_SHARED, handle, 0); |
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| 305 | if (sh.data == MAP_FAILED) |
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| 306 | dodo_throw exception::basic(exception::MODULE_DATAMEMORYSHARED, SHAREDEX_MAP, exception::ERRNO_ERRNO, errno, strerror(errno), __LINE__, __FILE__); |
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| 307 | |
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| 308 | #endif |
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| 309 | |
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| 310 | return sh.data; |
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| 311 | } |
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| 312 | |
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| 313 | //------------------------------------------------------------------- |
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| 314 | |
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| 315 | void |
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| 316 | shared::unmap() const |
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| 317 | { |
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| 318 | if (sh.data != NULL) { |
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| 319 | #ifdef XSI_IPC |
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| 320 | if (shmdt(sh.data) == -1) |
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| 321 | #else |
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| 322 | if (munmap(sh.data, sh.size) == -1) |
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| 323 | #endif |
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| 324 | |
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| 325 | dodo_throw exception::basic(exception::MODULE_DATAMEMORYSHARED, SHAREDEX_UNMAP, exception::ERRNO_ERRNO, errno, strerror(errno), __LINE__, __FILE__); |
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| 326 | |
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| 327 | sh.data = NULL; |
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| 328 | } |
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| 329 | } |
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| 330 | |
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| 331 | //------------------------------------------------------------------- |
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| 332 | |
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| 333 | void * |
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| 334 | shared::data() const |
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| 335 | { |
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| 336 | return sh.data ? sh.data : map(); |
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| 337 | } |
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| 338 | |
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| 339 | //------------------------------------------------------------------- |
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| 340 | |
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| 341 | unsigned long |
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| 342 | shared::size() const |
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| 343 | { |
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| 344 | #ifdef XSI_IPC |
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| 345 | if (handle == -1) { |
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| 346 | handle = shmget(key->key, 0, S_IRUSR | S_IWUSR); |
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| 347 | if (handle == -1) |
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| 348 | dodo_throw exception::basic(exception::MODULE_DATAMEMORYSHARED, SHAREDEX_SIZE, exception::ERRNO_ERRNO, errno, strerror(errno), __LINE__, __FILE__); |
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| 349 | } |
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| 350 | |
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| 351 | struct shmid_ds ds; |
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| 352 | |
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| 353 | if (shmctl(handle, IPC_STAT, &ds) == -1) |
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| 354 | dodo_throw exception::basic(exception::MODULE_DATAMEMORYSHARED, SHAREDEX_SIZE, exception::ERRNO_ERRNO, errno, strerror(errno), __LINE__, __FILE__); |
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| 355 | |
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| 356 | return ds.shm_segsz; |
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| 357 | #else |
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| 358 | struct stat st; |
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| 359 | |
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| 360 | if (fstat(handle, &st) == -1) |
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| 361 | dodo_throw exception::basic(exception::MODULE_DATAMEMORYSHARED, SHAREDEX_SIZE, exception::ERRNO_ERRNO, errno, strerror(errno), __LINE__, __FILE__); |
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| 362 | |
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| 363 | return st.st_size; |
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| 364 | #endif |
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| 365 | } |
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| 366 | |
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| 367 | //------------------------------------------------------------------- |
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| 368 | |
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