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BRCryptoBase.h
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118 lines (95 loc) · 4.3 KB
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//
// BRCryptoBase.h
// BRCore
//
// Created by Ed Gamble on 3/19/19.
// Copyright © 2019 breadwallet. All rights reserved.
//
// See the LICENSE file at the project root for license information.
// See the CONTRIBUTORS file at the project root for a list of contributors.
#ifndef BRCryptoBase_h
#define BRCryptoBase_h
#include <stdlib.h>
#include <inttypes.h>
#include <stdatomic.h>
// temporary
#if !defined (OwnershipGiven)
#define OwnershipGiven
#endif
#if !defined (OwnershipKept)
#define OwnershipKept
#endif
#ifdef __cplusplus
extern "C" {
#endif
typedef struct BRCryptoWalletRecord *BRCryptoWallet;
typedef struct BRCryptoWalletManagerRecord *BRCryptoWalletManager;
// Cookies are used as markers to match up an asynchronous operation
// request with its corresponding event.
typedef void *BRCryptoCookie;
typedef enum {
CRYPTO_FALSE = 0,
CRYPTO_TRUE = 1
} BRCryptoBoolean;
#define AS_CRYPTO_BOOLEAN(zeroIfFalse) ((zeroIfFalse) ? CRYPTO_TRUE : CRYPTO_FALSE)
// Only for use in Swift/Java
typedef size_t BRCryptoCount;
// Only for use in Swift/Java
static inline void
cryptoMemoryFree (void *memory) {
free (memory);
}
/// MARK: Reference Counting
typedef struct {
_Atomic(unsigned int) count;
void (*free) (void *);
} BRCryptoRef;
#if defined (CRYPTO_REF_DEBUG)
#include <stdio.h>
static int cryptoRefDebug = 1;
#define cryptoRefShow printf
#else
static int cryptoRefDebug = 0;
#define cryptoRefShow
#endif
#define DECLARE_CRYPTO_GIVE_TAKE(type, preface) \
extern type preface##Take (type obj); \
extern type preface##TakeWeak (type obj); \
extern void preface##Give (type obj)
#define IMPLEMENT_CRYPTO_GIVE_TAKE(type, preface) \
static void preface##Release (type obj); \
extern type \
preface##Take (type obj) { \
unsigned int _c = atomic_fetch_add (&obj->ref.count, 1); \
/* catch take after release */ \
assert (0 != _c); \
return obj; \
} \
extern type \
preface##TakeWeak (type obj) { \
unsigned int _c = atomic_load(&obj->ref.count); \
/* keep trying to take unless object is released */ \
while (_c != 0 && \
!atomic_compare_exchange_weak (&obj->ref.count, &_c, _c + 1)) {} \
if (cryptoRefDebug && 0 == _c) { cryptoRefShow ("CRY: Missed: %s\n", #type); }\
return (_c != 0) ? obj : NULL; \
} \
extern void \
preface##Give (type obj) { \
unsigned int _c = atomic_fetch_sub (&obj->ref.count, 1); \
/* catch give after release */ \
assert (0 != _c); \
if (1 == _c) { \
if (cryptoRefDebug) { cryptoRefShow ("CRY: Release: %s\n", #type); } \
obj->ref.free (obj); \
} \
}
#define CRYPTO_AS_FREE(release) ((void (*) (void *)) release)
#define CRYPTO_REF_ASSIGN(release) (BRCryptoRef) { 1, CRYPTO_AS_FREE (release) }
#if !defined (private_extern)
# define private_extern extern
#endif
#ifdef __cplusplus
}
#endif
#endif /* BRCryptoBase_h */