Annotation of embedaddon/php/Zend/zend_extensions.c, revision 1.1
1.1 ! misho 1: /*
! 2: +----------------------------------------------------------------------+
! 3: | Zend Engine |
! 4: +----------------------------------------------------------------------+
! 5: | Copyright (c) 1998-2012 Zend Technologies Ltd. (http://www.zend.com) |
! 6: +----------------------------------------------------------------------+
! 7: | This source file is subject to version 2.00 of the Zend license, |
! 8: | that is bundled with this package in the file LICENSE, and is |
! 9: | available through the world-wide-web at the following url: |
! 10: | http://www.zend.com/license/2_00.txt. |
! 11: | If you did not receive a copy of the Zend license and are unable to |
! 12: | obtain it through the world-wide-web, please send a note to |
! 13: | license@zend.com so we can mail you a copy immediately. |
! 14: +----------------------------------------------------------------------+
! 15: | Authors: Andi Gutmans <andi@zend.com> |
! 16: | Zeev Suraski <zeev@zend.com> |
! 17: +----------------------------------------------------------------------+
! 18: */
! 19:
! 20: /* $Id: zend_extensions.c 321634 2012-01-01 13:15:04Z felipe $ */
! 21:
! 22: #include "zend_extensions.h"
! 23:
! 24: ZEND_API zend_llist zend_extensions;
! 25: static int last_resource_number;
! 26:
! 27: int zend_load_extension(const char *path)
! 28: {
! 29: #if ZEND_EXTENSIONS_SUPPORT
! 30: DL_HANDLE handle;
! 31: zend_extension *new_extension;
! 32: zend_extension_version_info *extension_version_info;
! 33:
! 34: handle = DL_LOAD(path);
! 35: if (!handle) {
! 36: #ifndef ZEND_WIN32
! 37: fprintf(stderr, "Failed loading %s: %s\n", path, DL_ERROR());
! 38: /* See http://support.microsoft.com/kb/190351 */
! 39: #ifdef PHP_WIN32
! 40: fflush(stderr);
! 41: #endif
! 42: #else
! 43: fprintf(stderr, "Failed loading %s\n", path);
! 44: #endif
! 45: return FAILURE;
! 46: }
! 47:
! 48: extension_version_info = (zend_extension_version_info *) DL_FETCH_SYMBOL(handle, "extension_version_info");
! 49: if (!extension_version_info) {
! 50: extension_version_info = (zend_extension_version_info *) DL_FETCH_SYMBOL(handle, "_extension_version_info");
! 51: }
! 52: new_extension = (zend_extension *) DL_FETCH_SYMBOL(handle, "zend_extension_entry");
! 53: if (!new_extension) {
! 54: new_extension = (zend_extension *) DL_FETCH_SYMBOL(handle, "_zend_extension_entry");
! 55: }
! 56: if (!extension_version_info || !new_extension) {
! 57: fprintf(stderr, "%s doesn't appear to be a valid Zend extension\n", path);
! 58: /* See http://support.microsoft.com/kb/190351 */
! 59: #ifdef PHP_WIN32
! 60: fflush(stderr);
! 61: #endif
! 62: DL_UNLOAD(handle);
! 63: return FAILURE;
! 64: }
! 65:
! 66:
! 67: /* allow extension to proclaim compatibility with any Zend version */
! 68: if (extension_version_info->zend_extension_api_no != ZEND_EXTENSION_API_NO &&(!new_extension->api_no_check || new_extension->api_no_check(ZEND_EXTENSION_API_NO) != SUCCESS)) {
! 69: if (extension_version_info->zend_extension_api_no > ZEND_EXTENSION_API_NO) {
! 70: fprintf(stderr, "%s requires Zend Engine API version %d.\n"
! 71: "The Zend Engine API version %d which is installed, is outdated.\n\n",
! 72: new_extension->name,
! 73: extension_version_info->zend_extension_api_no,
! 74: ZEND_EXTENSION_API_NO);
! 75: /* See http://support.microsoft.com/kb/190351 */
! 76: #ifdef PHP_WIN32
! 77: fflush(stderr);
! 78: #endif
! 79: DL_UNLOAD(handle);
! 80: return FAILURE;
! 81: } else if (extension_version_info->zend_extension_api_no < ZEND_EXTENSION_API_NO) {
! 82: fprintf(stderr, "%s requires Zend Engine API version %d.\n"
! 83: "The Zend Engine API version %d which is installed, is newer.\n"
! 84: "Contact %s at %s for a later version of %s.\n\n",
! 85: new_extension->name,
! 86: extension_version_info->zend_extension_api_no,
! 87: ZEND_EXTENSION_API_NO,
! 88: new_extension->author,
! 89: new_extension->URL,
! 90: new_extension->name);
! 91: /* See http://support.microsoft.com/kb/190351 */
! 92: #ifdef PHP_WIN32
! 93: fflush(stderr);
! 94: #endif
! 95: DL_UNLOAD(handle);
! 96: return FAILURE;
! 97: }
! 98: } else if (strcmp(ZEND_EXTENSION_BUILD_ID, extension_version_info->build_id) &&
! 99: (!new_extension->build_id_check || new_extension->build_id_check(ZEND_EXTENSION_BUILD_ID) != SUCCESS)) {
! 100: fprintf(stderr, "Cannot load %s - it was built with configuration %s, whereas running engine is %s\n",
! 101: new_extension->name, extension_version_info->build_id, ZEND_EXTENSION_BUILD_ID);
! 102: /* See http://support.microsoft.com/kb/190351 */
! 103: #ifdef PHP_WIN32
! 104: fflush(stderr);
! 105: #endif
! 106: DL_UNLOAD(handle);
! 107: return FAILURE;
! 108: }
! 109:
! 110: return zend_register_extension(new_extension, handle);
! 111: #else
! 112: fprintf(stderr, "Extensions are not supported on this platform.\n");
! 113: /* See http://support.microsoft.com/kb/190351 */
! 114: #ifdef PHP_WIN32
! 115: fflush(stderr);
! 116: #endif
! 117: return FAILURE;
! 118: #endif
! 119: }
! 120:
! 121:
! 122: int zend_register_extension(zend_extension *new_extension, DL_HANDLE handle)
! 123: {
! 124: #if ZEND_EXTENSIONS_SUPPORT
! 125: zend_extension extension;
! 126:
! 127: extension = *new_extension;
! 128: extension.handle = handle;
! 129:
! 130: zend_extension_dispatch_message(ZEND_EXTMSG_NEW_EXTENSION, &extension);
! 131:
! 132: zend_llist_add_element(&zend_extensions, &extension);
! 133:
! 134: /*fprintf(stderr, "Loaded %s, version %s\n", extension.name, extension.version);*/
! 135: #endif
! 136:
! 137: return SUCCESS;
! 138: }
! 139:
! 140:
! 141: static void zend_extension_shutdown(zend_extension *extension TSRMLS_DC)
! 142: {
! 143: #if ZEND_EXTENSIONS_SUPPORT
! 144: if (extension->shutdown) {
! 145: extension->shutdown(extension);
! 146: }
! 147: #endif
! 148: }
! 149:
! 150: static int zend_extension_startup(zend_extension *extension)
! 151: {
! 152: #if ZEND_EXTENSIONS_SUPPORT
! 153: if (extension->startup) {
! 154: if (extension->startup(extension)!=SUCCESS) {
! 155: return 1;
! 156: }
! 157: zend_append_version_info(extension);
! 158: }
! 159: #endif
! 160: return 0;
! 161: }
! 162:
! 163:
! 164: int zend_startup_extensions_mechanism()
! 165: {
! 166: /* Startup extensions mechanism */
! 167: zend_llist_init(&zend_extensions, sizeof(zend_extension), (void (*)(void *)) zend_extension_dtor, 1);
! 168: last_resource_number = 0;
! 169: return SUCCESS;
! 170: }
! 171:
! 172:
! 173: int zend_startup_extensions()
! 174: {
! 175: zend_llist_apply_with_del(&zend_extensions, (int (*)(void *)) zend_extension_startup);
! 176: return SUCCESS;
! 177: }
! 178:
! 179:
! 180: void zend_shutdown_extensions(TSRMLS_D)
! 181: {
! 182: zend_llist_apply(&zend_extensions, (llist_apply_func_t) zend_extension_shutdown TSRMLS_CC);
! 183: zend_llist_destroy(&zend_extensions);
! 184: }
! 185:
! 186:
! 187: void zend_extension_dtor(zend_extension *extension)
! 188: {
! 189: #if ZEND_EXTENSIONS_SUPPORT && !ZEND_DEBUG
! 190: if (extension->handle) {
! 191: DL_UNLOAD(extension->handle);
! 192: }
! 193: #endif
! 194: }
! 195:
! 196:
! 197: static void zend_extension_message_dispatcher(const zend_extension *extension, int num_args, va_list args TSRMLS_DC)
! 198: {
! 199: int message;
! 200: void *arg;
! 201:
! 202: if (!extension->message_handler || num_args!=2) {
! 203: return;
! 204: }
! 205: message = va_arg(args, int);
! 206: arg = va_arg(args, void *);
! 207: extension->message_handler(message, arg);
! 208: }
! 209:
! 210:
! 211: ZEND_API void zend_extension_dispatch_message(int message, void *arg)
! 212: {
! 213: TSRMLS_FETCH();
! 214:
! 215: zend_llist_apply_with_arguments(&zend_extensions, (llist_apply_with_args_func_t) zend_extension_message_dispatcher TSRMLS_CC, 2, message, arg);
! 216: }
! 217:
! 218:
! 219: ZEND_API int zend_get_resource_handle(zend_extension *extension)
! 220: {
! 221: if (last_resource_number<ZEND_MAX_RESERVED_RESOURCES) {
! 222: extension->resource_number = last_resource_number;
! 223: return last_resource_number++;
! 224: } else {
! 225: return -1;
! 226: }
! 227: }
! 228:
! 229:
! 230: ZEND_API zend_extension *zend_get_extension(const char *extension_name)
! 231: {
! 232: zend_llist_element *element;
! 233:
! 234: for (element = zend_extensions.head; element; element = element->next) {
! 235: zend_extension *extension = (zend_extension *) element->data;
! 236:
! 237: if (!strcmp(extension->name, extension_name)) {
! 238: return extension;
! 239: }
! 240: }
! 241: return NULL;
! 242: }
! 243:
! 244: /*
! 245: * Local variables:
! 246: * tab-width: 4
! 247: * c-basic-offset: 4
! 248: * indent-tabs-mode: t
! 249: * End:
! 250: */
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