1/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to.  The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 *    notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 *    notice, this list of conditions and the following disclaimer in the
29 *    documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 *    must display the following acknowledgement:
32 *    "This product includes cryptographic software written by
33 *     Eric Young (eay@cryptsoft.com)"
34 *    The word 'cryptographic' can be left out if the rouines from the library
35 *    being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 *    the apps directory (application code) you must include an acknowledgement:
38 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed.  i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
56
57#include <openssl/thread.h>
58
59#include <errno.h>
60
61#if defined(OPENSSL_WINDOWS)
62#include <Windows.h>
63#endif
64
65#include <openssl/mem.h>
66#include <openssl/type_check.h>
67
68/* lock_names contains the names of all the locks defined in thread.h. */
69static const char *const lock_names[] = {
70    "<<ERROR>>",    "err",          "ex_data",       "x509",
71    "x509_info",    "x509_pkey",    "x509_crl",      "x509_req",
72    "dsa",          "rsa",          "evp_pkey",      "x509_store",
73    "ssl_ctx",      "ssl_cert",     "ssl_session",   "ssl_sess_cert",
74    "ssl",          "ssl_method",   "rand",          "rand2",
75    "debug_malloc", "BIO",          "gethostbyname", "getservbyname",
76    "readdir",      "RSA_blinding", "dh",            "debug_malloc2",
77    "dso",          "dynlock",      "engine",        "ui",
78    "ecdsa",        "ec",           "ecdh",          "bn",
79    "ec_pre_comp",  "store",        "comp",          "fips",
80    "fips2",        "obj",
81};
82
83OPENSSL_COMPILE_ASSERT(CRYPTO_NUM_LOCKS ==
84                           sizeof(lock_names) / sizeof(lock_names[0]),
85                       CRYPTO_NUM_LOCKS_inconsistent);
86
87static void (*locking_callback)(int mode, int lock_num, const char *file,
88                                int line) = 0;
89static int (*add_lock_callback)(int *pointer, int amount, int lock_num,
90                                const char *file, int line) = 0;
91static void (*threadid_callback)(CRYPTO_THREADID *) = 0;
92
93
94int CRYPTO_num_locks(void) { return CRYPTO_NUM_LOCKS; }
95
96void CRYPTO_set_locking_callback(void (*func)(int mode, int lock_num,
97                                              const char *file, int line)) {
98  locking_callback = func;
99}
100
101void CRYPTO_set_add_lock_callback(int (*func)(int *num, int mount, int lock_num,
102                                              const char *file, int line)) {
103  add_lock_callback = func;
104}
105
106const char *CRYPTO_get_lock_name(int lock_num) {
107  if (lock_num >= 0 && lock_num < CRYPTO_NUM_LOCKS) {
108    return lock_names[lock_num];
109  } else {
110    return "ERROR";
111  }
112}
113
114int CRYPTO_THREADID_set_callback(void (*func)(CRYPTO_THREADID *)) {
115  if (threadid_callback) {
116    return 0;
117  }
118  threadid_callback = func;
119  return 1;
120}
121
122void CRYPTO_THREADID_set_numeric(CRYPTO_THREADID *id, unsigned long val) {
123  memset(id, 0, sizeof(*id));
124  id->val = val;
125}
126
127void CRYPTO_THREADID_set_pointer(CRYPTO_THREADID *id, void *ptr) {
128  memset(id, 0, sizeof(*id));
129  id->ptr = ptr;
130}
131
132void (*CRYPTO_get_locking_callback(void))(int mode, int lock_num,
133                                          const char *file, int line) {
134  return locking_callback;
135}
136
137int (*CRYPTO_get_add_lock_callback(void))(int *num, int mount, int lock_num,
138                                          const char *file, int line) {
139  return add_lock_callback;
140}
141
142void CRYPTO_lock(int mode, int lock_num, const char *file, int line) {
143  if (locking_callback != NULL) {
144    locking_callback(mode, lock_num, file, line);
145  }
146}
147
148int CRYPTO_add_lock(int *pointer, int amount, int lock_num, const char *file,
149                    int line) {
150  int ret = 0;
151
152  if (add_lock_callback != NULL) {
153    ret = add_lock_callback(pointer, amount, lock_num, file, line);
154  } else {
155    CRYPTO_lock(CRYPTO_LOCK | CRYPTO_WRITE, lock_num, file, line);
156    ret = *pointer + amount;
157    *pointer = ret;
158    CRYPTO_lock(CRYPTO_UNLOCK | CRYPTO_WRITE, lock_num, file, line);
159  }
160
161  return ret;
162}
163
164void CRYPTO_THREADID_current(CRYPTO_THREADID *id) {
165  if (threadid_callback) {
166    threadid_callback(id);
167    return;
168  }
169
170#if defined(OPENSSL_WINDOWS)
171  CRYPTO_THREADID_set_numeric(id, (unsigned long)GetCurrentThreadId());
172#else
173  /* For everything else, default to using the address of 'errno' */
174  CRYPTO_THREADID_set_pointer(id, (void *)&errno);
175#endif
176}
177
178int CRYPTO_THREADID_cmp(const CRYPTO_THREADID *a, const CRYPTO_THREADID *b) {
179  return memcmp(a, b, sizeof(*a));
180}
181
182void CRYPTO_THREADID_cpy(CRYPTO_THREADID *dest, const CRYPTO_THREADID *src) {
183  memcpy(dest, src, sizeof(*src));
184}
185
186uint32_t CRYPTO_THREADID_hash(const CRYPTO_THREADID *id) {
187  return OPENSSL_hash32(id, sizeof(CRYPTO_THREADID));
188}
189
190void CRYPTO_set_id_callback(unsigned long (*func)(void)) {}
191
192void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value *(
193    *dyn_create_function)(const char *file, int line)) {}
194
195void CRYPTO_set_dynlock_lock_callback(void (*dyn_lock_function)(
196    int mode, struct CRYPTO_dynlock_value *l, const char *file, int line)) {}
197
198void CRYPTO_set_dynlock_destroy_callback(void (*dyn_destroy_function)(
199    struct CRYPTO_dynlock_value *l, const char *file, int line)) {}
200