mirror of
https://github.com/php/php-src.git
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227 lines
6.7 KiB
C
227 lines
6.7 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) 1998-2009 Zend Technologies Ltd. (http://www.zend.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 2.00 of the Zend license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.zend.com/license/2_00.txt. |
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| If you did not receive a copy of the Zend license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@zend.com so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Andi Gutmans <andi@zend.com> |
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| Zeev Suraski <zeev@zend.com> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#include "zend_extensions.h"
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ZEND_API zend_llist zend_extensions;
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static int last_resource_number;
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int zend_load_extension(const char *path)
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{
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#if ZEND_EXTENSIONS_SUPPORT
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DL_HANDLE handle;
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zend_extension *new_extension;
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zend_extension_version_info *extension_version_info;
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handle = DL_LOAD(path);
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if (!handle) {
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#ifndef ZEND_WIN32
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fprintf(stderr, "Failed loading %s: %s\n", path, DL_ERROR());
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#else
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fprintf(stderr, "Failed loading %s\n", path);
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#endif
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return FAILURE;
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}
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extension_version_info = (zend_extension_version_info *) DL_FETCH_SYMBOL(handle, "extension_version_info");
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if (!extension_version_info) {
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extension_version_info = (zend_extension_version_info *) DL_FETCH_SYMBOL(handle, "_extension_version_info");
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}
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new_extension = (zend_extension *) DL_FETCH_SYMBOL(handle, "zend_extension_entry");
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if (!new_extension) {
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new_extension = (zend_extension *) DL_FETCH_SYMBOL(handle, "_zend_extension_entry");
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}
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if (!extension_version_info || !new_extension) {
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fprintf(stderr, "%s doesn't appear to be a valid Zend extension\n", path);
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DL_UNLOAD(handle);
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return FAILURE;
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}
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/* allow extension to proclaim compatibility with any Zend version */
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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)) {
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if (extension_version_info->zend_extension_api_no > ZEND_EXTENSION_API_NO) {
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fprintf(stderr, "%s requires Zend Engine API version %d.\n"
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"The Zend Engine API version %d which is installed, is outdated.\n\n",
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new_extension->name,
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extension_version_info->zend_extension_api_no,
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ZEND_EXTENSION_API_NO);
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DL_UNLOAD(handle);
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return FAILURE;
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} else if (extension_version_info->zend_extension_api_no < ZEND_EXTENSION_API_NO) {
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fprintf(stderr, "%s requires Zend Engine API version %d.\n"
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"The Zend Engine API version %d which is installed, is newer.\n"
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"Contact %s at %s for a later version of %s.\n\n",
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new_extension->name,
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extension_version_info->zend_extension_api_no,
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ZEND_EXTENSION_API_NO,
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new_extension->author,
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new_extension->URL,
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new_extension->name);
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DL_UNLOAD(handle);
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return FAILURE;
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}
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} else if (strcmp(ZEND_EXTENSION_BUILD_ID, extension_version_info->build_id) &&
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(!new_extension->build_id_check || new_extension->build_id_check(ZEND_EXTENSION_BUILD_ID) != SUCCESS)) {
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fprintf(stderr, "Cannot load %s - it was built with configuration %s, whereas running engine is %s\n",
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new_extension->name, extension_version_info->build_id, ZEND_EXTENSION_BUILD_ID);
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DL_UNLOAD(handle);
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return FAILURE;
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}
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return zend_register_extension(new_extension, handle);
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#else
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fprintf(stderr, "Extensions are not supported on this platform.\n");
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return FAILURE;
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#endif
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}
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int zend_register_extension(zend_extension *new_extension, DL_HANDLE handle)
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{
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#if ZEND_EXTENSIONS_SUPPORT
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zend_extension extension;
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extension = *new_extension;
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extension.handle = handle;
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zend_extension_dispatch_message(ZEND_EXTMSG_NEW_EXTENSION, &extension);
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zend_llist_add_element(&zend_extensions, &extension);
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/*fprintf(stderr, "Loaded %s, version %s\n", extension.name, extension.version);*/
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#endif
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return SUCCESS;
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}
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static void zend_extension_shutdown(zend_extension *extension TSRMLS_DC)
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{
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#if ZEND_EXTENSIONS_SUPPORT
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if (extension->shutdown) {
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extension->shutdown(extension);
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}
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#endif
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}
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static int zend_extension_startup(zend_extension *extension)
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{
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#if ZEND_EXTENSIONS_SUPPORT
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if (extension->startup) {
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if (extension->startup(extension)!=SUCCESS) {
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return 1;
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}
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zend_append_version_info(extension);
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}
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#endif
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return 0;
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}
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int zend_startup_extensions_mechanism()
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{
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/* Startup extensions mechanism */
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zend_llist_init(&zend_extensions, sizeof(zend_extension), (void (*)(void *)) zend_extension_dtor, 1);
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last_resource_number = 0;
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return SUCCESS;
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}
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int zend_startup_extensions()
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{
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zend_llist_apply_with_del(&zend_extensions, (int (*)(void *)) zend_extension_startup);
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return SUCCESS;
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}
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void zend_shutdown_extensions(TSRMLS_D)
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{
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zend_llist_apply(&zend_extensions, (llist_apply_func_t) zend_extension_shutdown TSRMLS_CC);
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zend_llist_destroy(&zend_extensions);
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}
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void zend_extension_dtor(zend_extension *extension)
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{
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#if ZEND_EXTENSIONS_SUPPORT && !ZEND_DEBUG
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if (extension->handle) {
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DL_UNLOAD(extension->handle);
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}
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#endif
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}
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static void zend_extension_message_dispatcher(const zend_extension *extension, int num_args, va_list args TSRMLS_DC)
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{
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int message;
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void *arg;
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if (!extension->message_handler || num_args!=2) {
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return;
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}
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message = va_arg(args, int);
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arg = va_arg(args, void *);
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extension->message_handler(message, arg);
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}
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ZEND_API void zend_extension_dispatch_message(int message, void *arg)
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{
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TSRMLS_FETCH();
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zend_llist_apply_with_arguments(&zend_extensions, (llist_apply_with_args_func_t) zend_extension_message_dispatcher TSRMLS_CC, 2, message, arg);
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}
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ZEND_API int zend_get_resource_handle(zend_extension *extension)
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{
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if (last_resource_number<ZEND_MAX_RESERVED_RESOURCES) {
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extension->resource_number = last_resource_number;
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return last_resource_number++;
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} else {
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return -1;
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}
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}
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ZEND_API zend_extension *zend_get_extension(const char *extension_name)
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{
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zend_llist_element *element;
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for (element = zend_extensions.head; element; element = element->next) {
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zend_extension *extension = (zend_extension *) element->data;
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if (!strcmp(extension->name, extension_name)) {
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return extension;
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}
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}
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return NULL;
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}
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* indent-tabs-mode: t
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* End:
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*/
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