summaryrefslogtreecommitdiff
path: root/Zend/zend_extensions.c
blob: 2dd7cd4c598c943e7483598b45fbee854478bc98 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
/*
   +----------------------------------------------------------------------+
   | Zend Engine                                                          |
   +----------------------------------------------------------------------+
   | Copyright (c) 1998-2013 Zend Technologies Ltd. (http://www.zend.com) |
   +----------------------------------------------------------------------+
   | This source file is subject to version 2.00 of the Zend license,     |
   | that is bundled with this package in the file LICENSE, and is        | 
   | available through the world-wide-web at the following url:           |
   | http://www.zend.com/license/2_00.txt.                                |
   | If you did not receive a copy of the Zend license and are unable to  |
   | obtain it through the world-wide-web, please send a note to          |
   | license@zend.com so we can mail you a copy immediately.              |
   +----------------------------------------------------------------------+
   | Authors: Andi Gutmans <andi@zend.com>                                |
   |          Zeev Suraski <zeev@zend.com>                                |
   +----------------------------------------------------------------------+
*/

/* $Id$ */

#include "zend_extensions.h"

ZEND_API zend_llist zend_extensions;
static int last_resource_number;

int zend_load_extension(const char *path)
{
#if ZEND_EXTENSIONS_SUPPORT
	DL_HANDLE handle;
	zend_extension *new_extension;
	zend_extension_version_info *extension_version_info;

	handle = DL_LOAD(path);
	if (!handle) {
#ifndef ZEND_WIN32
		fprintf(stderr, "Failed loading %s:  %s\n", path, DL_ERROR());
/* See http://support.microsoft.com/kb/190351 */
#ifdef PHP_WIN32
		fflush(stderr);
#endif
#else
		fprintf(stderr, "Failed loading %s\n", path);
#endif
		return FAILURE;
	}

	extension_version_info = (zend_extension_version_info *) DL_FETCH_SYMBOL(handle, "extension_version_info");
	if (!extension_version_info) {
		extension_version_info = (zend_extension_version_info *) DL_FETCH_SYMBOL(handle, "_extension_version_info");
	}
	new_extension = (zend_extension *) DL_FETCH_SYMBOL(handle, "zend_extension_entry");
	if (!new_extension) {
		new_extension = (zend_extension *) DL_FETCH_SYMBOL(handle, "_zend_extension_entry");
	}
	if (!extension_version_info || !new_extension) {
		fprintf(stderr, "%s doesn't appear to be a valid Zend extension\n", path);
/* See http://support.microsoft.com/kb/190351 */
#ifdef PHP_WIN32
		fflush(stderr);
#endif
		DL_UNLOAD(handle);
		return FAILURE;
	}


	/* allow extension to proclaim compatibility with any Zend version */
	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)) {
		if (extension_version_info->zend_extension_api_no > ZEND_EXTENSION_API_NO) {
			fprintf(stderr, "%s requires Zend Engine API version %d.\n"
					"The Zend Engine API version %d which is installed, is outdated.\n\n",
					new_extension->name,
					extension_version_info->zend_extension_api_no,
					ZEND_EXTENSION_API_NO);
/* See http://support.microsoft.com/kb/190351 */
#ifdef PHP_WIN32
			fflush(stderr);
#endif
			DL_UNLOAD(handle);
			return FAILURE;
		} else if (extension_version_info->zend_extension_api_no < ZEND_EXTENSION_API_NO) {
			fprintf(stderr, "%s requires Zend Engine API version %d.\n"
					"The Zend Engine API version %d which is installed, is newer.\n"
					"Contact %s at %s for a later version of %s.\n\n",
					new_extension->name,
					extension_version_info->zend_extension_api_no,
					ZEND_EXTENSION_API_NO,
					new_extension->author,
					new_extension->URL,
					new_extension->name);
/* See http://support.microsoft.com/kb/190351 */
#ifdef PHP_WIN32
			fflush(stderr);
#endif
			DL_UNLOAD(handle);
			return FAILURE;
		}
	} else if (strcmp(ZEND_EXTENSION_BUILD_ID, extension_version_info->build_id) &&
	           (!new_extension->build_id_check || new_extension->build_id_check(ZEND_EXTENSION_BUILD_ID) != SUCCESS)) {
		fprintf(stderr, "Cannot load %s - it was built with configuration %s, whereas running engine is %s\n",
					new_extension->name, extension_version_info->build_id, ZEND_EXTENSION_BUILD_ID);
/* See http://support.microsoft.com/kb/190351 */
#ifdef PHP_WIN32
		fflush(stderr);
#endif
		DL_UNLOAD(handle);
		return FAILURE;
	}

	return zend_register_extension(new_extension, handle);
#else
	fprintf(stderr, "Extensions are not supported on this platform.\n");
/* See http://support.microsoft.com/kb/190351 */
#ifdef PHP_WIN32
	fflush(stderr);
#endif
	return FAILURE;
#endif
}


int zend_register_extension(zend_extension *new_extension, DL_HANDLE handle)
{
#if ZEND_EXTENSIONS_SUPPORT
	zend_extension extension;

	extension = *new_extension;
	extension.handle = handle;

	zend_extension_dispatch_message(ZEND_EXTMSG_NEW_EXTENSION, &extension);

	zend_llist_add_element(&zend_extensions, &extension);

	/*fprintf(stderr, "Loaded %s, version %s\n", extension.name, extension.version);*/
#endif

	return SUCCESS;
}


static void zend_extension_shutdown(zend_extension *extension TSRMLS_DC)
{
#if ZEND_EXTENSIONS_SUPPORT
	if (extension->shutdown) {
		extension->shutdown(extension);
	}
#endif
}

static int zend_extension_startup(zend_extension *extension)
{
#if ZEND_EXTENSIONS_SUPPORT
	if (extension->startup) {
		if (extension->startup(extension)!=SUCCESS) {
			return 1;
		}
		zend_append_version_info(extension);
	}
#endif
	return 0;
}


int zend_startup_extensions_mechanism()
{
	/* Startup extensions mechanism */
	zend_llist_init(&zend_extensions, sizeof(zend_extension), (void (*)(void *)) zend_extension_dtor, 1);
	last_resource_number = 0;
	return SUCCESS;
}


int zend_startup_extensions()
{
	zend_llist_apply_with_del(&zend_extensions, (int (*)(void *)) zend_extension_startup);
	return SUCCESS;
}


void zend_shutdown_extensions(TSRMLS_D)
{
	zend_llist_apply(&zend_extensions, (llist_apply_func_t) zend_extension_shutdown TSRMLS_CC);
	zend_llist_destroy(&zend_extensions);
}


void zend_extension_dtor(zend_extension *extension)
{
#if ZEND_EXTENSIONS_SUPPORT && !ZEND_DEBUG
	if (extension->handle) {
		DL_UNLOAD(extension->handle);
	}
#endif
}


static void zend_extension_message_dispatcher(const zend_extension *extension, int num_args, va_list args TSRMLS_DC)
{
	int message;
	void *arg;

	if (!extension->message_handler || num_args!=2) {
		return;
	}
	message = va_arg(args, int);
	arg = va_arg(args, void *);
	extension->message_handler(message, arg);
}


ZEND_API void zend_extension_dispatch_message(int message, void *arg)
{
	TSRMLS_FETCH();

	zend_llist_apply_with_arguments(&zend_extensions, (llist_apply_with_args_func_t) zend_extension_message_dispatcher TSRMLS_CC, 2, message, arg);
}


ZEND_API int zend_get_resource_handle(zend_extension *extension)
{
	if (last_resource_number<ZEND_MAX_RESERVED_RESOURCES) {
		extension->resource_number = last_resource_number;
		return last_resource_number++;
	} else {
		return -1;
	}
}


ZEND_API zend_extension *zend_get_extension(const char *extension_name)
{
	zend_llist_element *element;

	for (element = zend_extensions.head; element; element = element->next) {
		zend_extension *extension = (zend_extension *) element->data;

		if (!strcmp(extension->name, extension_name)) {
			return extension;
		}
	}
	return NULL;
}

/*
 * Local variables:
 * tab-width: 4
 * c-basic-offset: 4
 * indent-tabs-mode: t
 * End:
 */