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CRYPTO_LOCK(3) Library Functions Manual CRYPTO_LOCK(3)

CRYPTO_lock, CRYPTO_w_lock, CRYPTO_w_unlock, CRYPTO_r_lock, CRYPTO_r_unlock, CRYPTO_addthread support

#include <openssl/crypto.h>

void
CRYPTO_lock(int mode, int type, const char *file, int line);

int
CRYPTO_add(int *p, int amount, int type);

#define	CRYPTO_w_lock(type) \
	CRYPTO_lock(CRYPTO_LOCK|CRYPTO_WRITE, type, __FILE__, __LINE__)
#define	CRYPTO_w_unlock(type) \
	CRYPTO_lock(CRYPTO_UNLOCK|CRYPTO_WRITE, type, __FILE__, __LINE__)
#define	CRYPTO_r_lock(type) \
	CRYPTO_lock(CRYPTO_LOCK|CRYPTO_READ, type, __FILE__, __LINE__)
#define	CRYPTO_r_unlock(type) \
	CRYPTO_lock(CRYPTO_UNLOCK|CRYPTO_READ, type, __FILE__, __LINE__)

These functions are obsolete. () locks or unlocks a mutex lock.

mode is a bitfield describing what should be done with the lock. For each call, either CRYPTO_LOCK or CRYPTO_UNLOCK must be included. In the LibreSSL implementation, CRYPTO_READ and CRYPTO_WRITE are ignored.

type is a number in the range 0 <= type < CRYPTO_NUM_LOCKS identifying a particular lock. Currently, the value of CRYPTO_NUM_LOCKS is 41.

The file and line arguments are ignored.

In the LibreSSL implementation, () is a wrapper around pthread_mutex_lock(3) and pthread_mutex_unlock(3).

() locks the lock number type, adds amount to *p, and unlocks the lock number type again.

CRYPTO_add() returns the new value of *p.

crypto(3)

CRYPTO_lock(), CRYPTO_w_lock(), CRYPTO_w_unlock(), CRYPTO_r_lock(), and CRYPTO_r_unlock() first appeared in SSLeay 0.6.0. CRYPTO_add() first appeared in SSLeay 0.6.2. These functions have been available since OpenBSD 2.4.

March 4, 2024 OpenBSD-7.5