boringssl/crypto/thread.c

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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.] */
#include <openssl/thread.h>
#include <errno.h>
#include <openssl/mem.h>
#include <openssl/type_check.h>
/* lock_names contains the names of all the locks defined in thread.h. */
static const char *const lock_names[] = {
"<<ERROR>>", "err", "ex_data", "x509",
"x509_info", "x509_pkey", "x509_crl", "x509_req",
"dsa", "rsa", "evp_pkey", "x509_store",
"ssl_ctx", "ssl_cert", "ssl_session", "ssl_sess_cert",
"ssl", "ssl_method", "rand", "rand2",
"debug_malloc", "BIO", "gethostbyname", "getservbyname",
"readdir", "RSA_blinding", "dh", "debug_malloc2",
"dso", "dynlock", "engine", "ui",
"ecdsa", "ec", "ecdh", "bn",
"ec_pre_comp", "store", "comp", "fips",
"fips2", "obj",
};
OPENSSL_COMPILE_ASSERT(CRYPTO_NUM_LOCKS ==
sizeof(lock_names) / sizeof(lock_names[0]),
CRYPTO_NUM_LOCKS_inconsistent);
static void (*locking_callback)(int mode, int lock_num, const char *file,
int line) = 0;
static int (*add_lock_callback)(int *pointer, int amount, int lock_num,
const char *file, int line) = 0;
static void (*threadid_callback)(CRYPTO_THREADID *) = 0;
int CRYPTO_num_locks(void) { return CRYPTO_NUM_LOCKS; }
void CRYPTO_set_locking_callback(void (*func)(int mode, int lock_num,
const char *file, int line)) {
locking_callback = func;
}
void CRYPTO_set_add_lock_callback(int (*func)(int *num, int mount, int lock_num,
const char *file, int line)) {
add_lock_callback = func;
}
const char *CRYPTO_get_lock_name(int lock_num) {
if (lock_num >= 0 && lock_num < CRYPTO_NUM_LOCKS) {
return lock_names[lock_num];
} else {
return "ERROR";
}
}
int CRYPTO_THREADID_set_callback(void (*func)(CRYPTO_THREADID *)) {
if (threadid_callback) {
return 0;
}
threadid_callback = func;
return 1;
}
void CRYPTO_THREADID_set_numeric(CRYPTO_THREADID *id, unsigned long val) {
memset(id, 0, sizeof(*id));
id->val = val;
}
void CRYPTO_THREADID_set_pointer(CRYPTO_THREADID *id, void *ptr) {
memset(id, 0, sizeof(*id));
id->ptr = ptr;
}
void (*CRYPTO_get_locking_callback(void))(int mode, int lock_num,
const char *file, int line) {
return locking_callback;
}
int (*CRYPTO_get_add_lock_callback(void))(int *num, int mount, int lock_num,
const char *file, int line) {
return add_lock_callback;
}
void CRYPTO_lock(int mode, int lock_num, const char *file, int line) {
if (locking_callback != NULL) {
locking_callback(mode, lock_num, file, line);
}
}
int CRYPTO_add_lock(int *pointer, int amount, int lock_num, const char *file,
int line) {
int ret = 0;
if (add_lock_callback != NULL) {
ret = add_lock_callback(pointer, amount, lock_num, file, line);
} else {
CRYPTO_lock(CRYPTO_LOCK | CRYPTO_WRITE, lock_num, file, line);
ret = *pointer + amount;
*pointer = ret;
CRYPTO_lock(CRYPTO_UNLOCK | CRYPTO_WRITE, lock_num, file, line);
}
return ret;
}
void CRYPTO_THREADID_current(CRYPTO_THREADID *id) {
if (threadid_callback) {
threadid_callback(id);
return;
}
#if defined(OPENSSL_WINDOWS)
CRYPTO_THREADID_set_numeric(id, (unsigned long)GetCurrentThreadId());
#else
/* For everything else, default to using the address of 'errno' */
CRYPTO_THREADID_set_pointer(id, (void *)&errno);
#endif
}
int CRYPTO_THREADID_cmp(const CRYPTO_THREADID *a, const CRYPTO_THREADID *b) {
return memcmp(a, b, sizeof(*a));
}
void CRYPTO_THREADID_cpy(CRYPTO_THREADID *dest, const CRYPTO_THREADID *src) {
memcpy(dest, src, sizeof(*src));
}
uint32_t CRYPTO_THREADID_hash(const CRYPTO_THREADID *id) {
return OPENSSL_hash32(id, sizeof(CRYPTO_THREADID));
}
void CRYPTO_set_id_callback(unsigned long (*func)(void)) {}
void CRYPTO_set_dynlock_create_callback(struct CRYPTO_dynlock_value *(
*dyn_create_function)(const char *file, int line)) {}
void CRYPTO_set_dynlock_lock_callback(void (*dyn_lock_function)(
int mode, struct CRYPTO_dynlock_value *l, const char *file, int line)) {}
void CRYPTO_set_dynlock_destroy_callback(void (*dyn_destroy_function)(
struct CRYPTO_dynlock_value *l, const char *file, int line)) {}