crypto/thread.c - boringssl - Git at Google

 /* 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>

 #if defined(OPENSSL_WINDOWS)
 #include <Windows.h>
 #endif

 #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)) {}
	/* 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>

	#if defined(OPENSSL_WINDOWS)
	#include <Windows.h>
	#endif

	#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)) {}