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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.] */
#ifndef OPENSSL_HEADER_THREAD_H
#define OPENSSL_HEADER_THREAD_H
#include <sys/types.h>
#include <openssl/base.h>
#if defined(__cplusplus)
extern "C" {
#endif
#if defined(OPENSSL_NO_THREADS)
typedef struct crypto_mutex_st {} CRYPTO_MUTEX;
#elif defined(OPENSSL_WINDOWS)
/* CRYPTO_MUTEX can appear in public header files so we really don't want to
* pull in windows.h. It's statically asserted that this structure is large
* enough to contain a Windows CRITICAL_SECTION by thread_win.c. */
typedef union crypto_mutex_st {
double alignment;
uint8_t padding[4*sizeof(void*) + 2*sizeof(int)];
} CRYPTO_MUTEX;
#elif defined(__MACH__) && defined(__APPLE__)
typedef pthread_rwlock_t CRYPTO_MUTEX;
#else
/* It is reasonable to include pthread.h on non-Windows systems, however the
* |pthread_rwlock_t| that we need is hidden under feature flags, and we can't
* ensure that we'll be able to get it. It's statically asserted that this
* structure is large enough to contain a |pthread_rwlock_t| by
* thread_pthread.c. */
typedef union crypto_mutex_st {
double alignment;
uint8_t padding[3*sizeof(int) + 5*sizeof(unsigned) + 16 + 8];
} CRYPTO_MUTEX;
#endif
/* Functions to support multithreading.
*
* OpenSSL can safely be used in multi-threaded applications provided that at
* least |CRYPTO_set_locking_callback| is set.
*
* The locking callback performs mutual exclusion. Rather than using a single
* lock for all, shared data-structures, OpenSSL requires that the locking
* callback support a fixed (at run-time) number of different locks, given by
* |CRYPTO_num_locks|. */
/* CRYPTO_num_locks returns the number of static locks that the callback
* function passed to |CRYPTO_set_locking_callback| must be able to handle. */
OPENSSL_EXPORT int CRYPTO_num_locks(void);
/* CRYPTO_set_locking_callback sets a callback function that implements locking
* on behalf of OpenSSL. The callback is called whenever OpenSSL needs to lock
* or unlock a lock, and locks are specified as a number between zero and
* |CRYPTO_num_locks()-1|.
*
* The mode argument to the callback is a bitwise-OR of either CRYPTO_LOCK or
* CRYPTO_UNLOCK, to denote the action, and CRYPTO_READ or CRYPTO_WRITE, to
* indicate the type of lock. The |file| and |line| arguments give the location
* in the OpenSSL source where the locking action originated. */
OPENSSL_EXPORT void CRYPTO_set_locking_callback(
void (*func)(int mode, int lock_num, const char *file, int line));
/* CRYPTO_set_add_lock_callback sets an optional callback which is used when
* OpenSSL needs to add a fixed amount to an integer. For example, this is used
* when maintaining reference counts. Normally the reference counts are
* maintained by performing the addition under a lock but, if this callback
* has been set, the application is free to implement the operation using
* faster methods (i.e. atomic operations).
*
* The callback is given a pointer to the integer to be altered (|num|), the
* amount to add to the integer (|amount|, which may be negative), the number
* of the lock which would have been taken to protect the operation and the
* position in the OpenSSL code where the operation originated. */
OPENSSL_EXPORT void CRYPTO_set_add_lock_callback(int (*func)(
int *num, int amount, int lock_num, const char *file, int line));
/* CRYPTO_get_lock_name returns the name of the lock given by |lock_num|. This
* can be used in a locking callback for debugging purposes. */
OPENSSL_EXPORT const char *CRYPTO_get_lock_name(int lock_num);
/* Deprecated functions */
/* CRYPTO_THREADID_set_callback does nothing. */
OPENSSL_EXPORT int CRYPTO_THREADID_set_callback(
void (*threadid_func)(CRYPTO_THREADID *threadid));
/* CRYPTO_THREADID_set_numeric does nothing. */
OPENSSL_EXPORT void CRYPTO_THREADID_set_numeric(CRYPTO_THREADID *id,
unsigned long val);
/* CRYPTO_THREADID_set_pointer does nothing. */
OPENSSL_EXPORT void CRYPTO_THREADID_set_pointer(CRYPTO_THREADID *id, void *ptr);
/* CRYPTO_THREADID_current does nothing. */
OPENSSL_EXPORT void CRYPTO_THREADID_current(CRYPTO_THREADID *id);
/* Private functions: */
/* CRYPTO_get_locking_callback returns the callback, if any, that was most
* recently set using |CRYPTO_set_locking_callback|. */
void (*CRYPTO_get_locking_callback(void))(int mode, int lock_num,
const char *file, int line);
/* CRYPTO_get_add_lock_callback returns the callback, if any, that was most
* recently set using |CRYPTO_set_add_lock_callback|. */
int (*CRYPTO_get_add_lock_callback(void))(int *num, int amount, int lock_num,
const char *file, int line);
/* CRYPTO_lock locks or unlocks the lock specified by |lock_num| (one of
* |CRYPTO_LOCK_*|). Don't call this directly, rather use one of the
* CRYPTO_[rw]_(un)lock macros. */
OPENSSL_EXPORT void CRYPTO_lock(int mode, int lock_num, const char *file,
int line);
/* CRYPTO_add_lock adds |amount| to |*pointer|, protected by the lock specified
* by |lock_num|. It returns the new value of |*pointer|. Don't call this
* function directly, rather use the |CRYPTO_add| macro. */
OPENSSL_EXPORT int CRYPTO_add_lock(int *pointer, int amount, int lock_num,
const char *file, int line);
/* Lock IDs start from 1. CRYPTO_LOCK_INVALID_LOCK is an unused placeholder
* used to ensure no lock has ID 0. */
#define CRYPTO_LOCK_LIST \
CRYPTO_LOCK_ITEM(CRYPTO_LOCK_INVALID_LOCK), \
CRYPTO_LOCK_ITEM(CRYPTO_LOCK_BIO), \
CRYPTO_LOCK_ITEM(CRYPTO_LOCK_DH), \
CRYPTO_LOCK_ITEM(CRYPTO_LOCK_DSA), \
CRYPTO_LOCK_ITEM(CRYPTO_LOCK_EC), \
CRYPTO_LOCK_ITEM(CRYPTO_LOCK_EC_PRE_COMP), \
CRYPTO_LOCK_ITEM(CRYPTO_LOCK_ERR), \
CRYPTO_LOCK_ITEM(CRYPTO_LOCK_EVP_PKEY), \
CRYPTO_LOCK_ITEM(CRYPTO_LOCK_EX_DATA), \
CRYPTO_LOCK_ITEM(CRYPTO_LOCK_OBJ), \
CRYPTO_LOCK_ITEM(CRYPTO_LOCK_RAND), \
CRYPTO_LOCK_ITEM(CRYPTO_LOCK_READDIR), \
CRYPTO_LOCK_ITEM(CRYPTO_LOCK_RSA), \
CRYPTO_LOCK_ITEM(CRYPTO_LOCK_RSA_BLINDING), \
CRYPTO_LOCK_ITEM(CRYPTO_LOCK_SSL_CTX), \
CRYPTO_LOCK_ITEM(CRYPTO_LOCK_SSL_SESSION), \
CRYPTO_LOCK_ITEM(CRYPTO_LOCK_X509), \
CRYPTO_LOCK_ITEM(CRYPTO_LOCK_X509_INFO), \
CRYPTO_LOCK_ITEM(CRYPTO_LOCK_X509_PKEY), \
CRYPTO_LOCK_ITEM(CRYPTO_LOCK_X509_CRL), \
CRYPTO_LOCK_ITEM(CRYPTO_LOCK_X509_REQ), \
CRYPTO_LOCK_ITEM(CRYPTO_LOCK_X509_STORE), \
#define CRYPTO_LOCK_ITEM(x) x
enum {
CRYPTO_LOCK_LIST
};
#undef CRYPTO_LOCK_ITEM
#define CRYPTO_LOCK 1
#define CRYPTO_UNLOCK 2
#define CRYPTO_READ 4
#define CRYPTO_WRITE 8
#define CRYPTO_w_lock(lock_num) \
CRYPTO_lock(CRYPTO_LOCK | CRYPTO_WRITE, lock_num, __FILE__, __LINE__)
#define CRYPTO_w_unlock(lock_num) \
CRYPTO_lock(CRYPTO_UNLOCK | CRYPTO_WRITE, lock_num, __FILE__, __LINE__)
#define CRYPTO_r_lock(lock_num) \
CRYPTO_lock(CRYPTO_LOCK | CRYPTO_READ, lock_num, __FILE__, __LINE__)
#define CRYPTO_r_unlock(lock_num) \
CRYPTO_lock(CRYPTO_UNLOCK | CRYPTO_READ, lock_num, __FILE__, __LINE__)
#define CRYPTO_add(addr, amount, lock_num) \
CRYPTO_add_lock(addr, amount, lock_num, __FILE__, __LINE__)
/* Private functions.
*
* Some old code calls these functions and so no-op implementations are
* provided.
*
* TODO(fork): cleanup callers and remove. */
OPENSSL_EXPORT void CRYPTO_set_id_callback(unsigned long (*func)(void));
typedef struct {
int references;
struct CRYPTO_dynlock_value *data;
} CRYPTO_dynlock;
OPENSSL_EXPORT void CRYPTO_set_dynlock_create_callback(
struct CRYPTO_dynlock_value *(*dyn_create_function)(const char *file,
int line));
OPENSSL_EXPORT void CRYPTO_set_dynlock_lock_callback(void (*dyn_lock_function)(
int mode, struct CRYPTO_dynlock_value *l, const char *file, int line));
OPENSSL_EXPORT void CRYPTO_set_dynlock_destroy_callback(
void (*dyn_destroy_function)(struct CRYPTO_dynlock_value *l,
const char *file, int line));
#if defined(__cplusplus)
} /* extern C */
#endif
#endif /* OPENSSL_HEADER_THREAD_H */
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