/* * M*LIB - Basic Protection module over container. * * Copyright (c) 2017-2018, Patrick Pelissier * All rights reserved. * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * + Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * + 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. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS AND 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. */ #ifndef MSTARLIB_PROTECT_H #define MSTARLIB_PROTECT_H #include "m-core.h" #include "m-mutex.h" /* Define a dynamic array of the given type and its associated functions. USAGE: PROTECT_DEF(name, type [, oplist_of_the_type]) */ #define PROTECT_DEF(name, ...) \ PROTECTI_DEF(M_IF_NARGS_EQ1(__VA_ARGS__) \ ((name, __VA_ARGS__, M_GLOBAL_OPLIST_OR_DEF(__VA_ARGS__)(), M_C(name,_t), M_C(name,_it_t) ), \ (name, __VA_ARGS__, M_C(name,_t), M_C(name,_it_t)))) /********************************** INTERNAL ************************************/ // Deferred evaluation for the PROTECT definition. #define PROTECTI_DEF(arg) PROTECTI_DEF2 arg // Internal definition. #define PROTECTI_DEF2(name, type, oplist, protect_t, protect_it_t) \ \ typedef struct M_C(name, _s) { \ m_mutex_t lock; \ type data; \ } protect_t[1]; \ \ typedef struct M_C(name, _s) *M_C(name, _ptr); \ typedef const struct M_C(name, _s) *M_C(name, _srcptr); \ \ typedef type M_C(name, _type_t); \ \ M_IF_METHOD(INIT, oplist)( \ static inline void \ M_C(name, _init)(protect_t out) \ { \ m_mutex_init(out->lock); \ M_CALL_INIT(oplist, out->data); \ } \ ,) \ \ M_IF_METHOD(INIT_SET, oplist)( \ static inline void \ M_C(name, _init_set)(protect_t out, protect_t src) \ { \ m_mutex_init(out->lock); \ m_mutex_lock (src->lock); \ M_CALL_INIT_SET(oplist, out->data, src->data); \ m_mutex_unlock(src->lock); \ } \ ,) \ \ M_IF_METHOD(SET, oplist)( \ static inline void \ M_C(name, _set)(protect_t out, protect_t src) \ { \ if (out < src) { \ m_mutex_lock (out->lock); \ m_mutex_lock (src->lock); \ } else { \ m_mutex_lock (src->lock); \ m_mutex_lock (out->lock); \ } \ M_CALL_SET(oplist, out->data, src->data); \ if (out < src) { \ m_mutex_unlock (src->lock); \ m_mutex_unlock (out->lock); \ } else { \ m_mutex_unlock (out->lock); \ m_mutex_unlock (src->lock); \ } \ } \ ,) \ \ M_IF_METHOD(CLEAR, oplist)( \ static inline void \ M_C(name, _clear)(protect_t out) \ { \ /* No need to lock */ \ M_CALL_CLEAR(oplist, out->data); \ m_mutex_clear (out->lock); \ } \ ,) \ \ M_IF_METHOD(INIT_MOVE, oplist)( \ static inline void \ M_C(name, _init_move)(protect_t out, protect_t src) \ { \ /* No need to lock 'src' ? */ \ m_mutex_init (out->lock); \ M_CALL_INIT_MOVE(oplist, out->data, src->data); \ m_mutex_clear (src->lock); \ } \ ,) \ \ M_IF_METHOD(MOVE, oplist)( \ static inline void \ M_C(name, _move)(protect_t out, protect_t src) \ { \ /* No need to lock 'src' ? */ \ m_mutex_lock (out->lock); \ M_CALL_MOVE(oplist, out->data, src->data); \ m_mutex_unlock (out->lock); \ m_mutex_clear (src->lock); \ } \ ,) \ \ M_IF_METHOD(SWAP, oplist)( \ static inline void \ M_C(name, _swap)(protect_t out, protect_t src) \ { \ if (out < src) { \ m_mutex_lock (out->lock); \ m_mutex_lock (src->lock); \ } else { \ m_mutex_lock (src->lock); \ m_mutex_lock (out->lock); \ } \ M_CALL_SWAP(oplist, out->data, src->data); \ if (out < src) { \ m_mutex_unlock (src->lock); \ m_mutex_unlock (out->lock); \ } else { \ m_mutex_unlock (out->lock); \ m_mutex_unlock (src->lock); \ } \ } \ ,) \ \ M_IF_METHOD(CLEAN, oplist)( \ static inline void \ M_C(name, _clean)(protect_t out) \ { \ m_mutex_lock (out->lock); \ M_CALL_CLEAN(oplist, out->data); \ m_mutex_unlock (out->lock); \ } \ ,) \ \ M_IF_METHOD(SET_KEY, oplist)( \ static inline void \ M_C(name, _set_at)(protect_t out, M_GET_KEY_TYPE oplist key, M_GET_VALUE_TYPE oplist data) \ { \ m_mutex_lock (out->lock); \ M_CALL_SET_KEY(oplist, out->data, key, data); \ m_mutex_unlock (out->lock); \ } \ ,) \ \ M_IF_METHOD(GET_KEY, oplist)( \ static inline bool \ M_C(name, _get_copy)(M_GET_VALUE_TYPE oplist *out_data, protect_t out, M_GET_KEY_TYPE oplist key) \ { \ m_mutex_lock (out->lock); \ M_GET_VALUE_TYPE oplist *p = M_CALL_GET_KEY(oplist, out->data, key); \ if (p != NULL) { \ M_CALL_SET(M_GET_VALUE_OPLIST oplist, *out_data, *p); \ } \ m_mutex_unlock (out->lock); \ return p != NULL; \ } \ ,) \ \ M_IF_METHOD(GET_SET_KEY, oplist)( \ static inline void \ M_C(name, _get_at_copy)(M_GET_VALUE_TYPE oplist *out_data, protect_t out, M_GET_KEY_TYPE oplist key) \ { \ m_mutex_lock (out->lock); \ M_GET_VALUE_TYPE oplist *p = M_CALL_GET_SET_KEY(oplist, out->data, key); \ assert (p != NULL); \ M_CALL_SET(M_GET_VALUE_OPLIST oplist, *out_data, *p); \ m_mutex_unlock (out->lock); \ } \ ,) \ \ M_IF_METHOD(ERASE_KEY, oplist)( \ static inline bool \ M_C(name, _erase)(protect_t out, M_GET_KEY_TYPE oplist key) \ { \ m_mutex_lock (out->lock); \ bool b = M_CALL_ERASE_KEY(oplist, out->data, key); \ m_mutex_unlock (out->lock); \ return b; \ } \ ,) \ \ M_IF_METHOD(PUSH, oplist)( \ static inline void \ M_C(name, _push)(protect_t out, M_GET_SUBTYPE oplist data) \ { \ m_mutex_lock (out->lock); \ M_CALL_PUSH(oplist, out->data, data); \ m_mutex_unlock (out->lock); \ } \ ,) \ \ M_IF_METHOD(POP, oplist)( \ static inline void \ M_C(name, _pop)(M_GET_SUBTYPE oplist *p, protect_t out) \ { \ m_mutex_lock (out->lock); \ M_CALL_POP(oplist, p, out->data); \ m_mutex_unlock (out->lock); \ } \ ,) \ \ M_IF_METHOD(PUSH_MOVE, oplist)( \ static inline void \ M_C(name, _push_move)(protect_t out, M_GET_SUBTYPE oplist *data) \ { \ m_mutex_lock (out->lock); \ M_CALL_PUSH_MOVE(oplist, out->data, data); \ m_mutex_unlock (out->lock); \ } \ ,) \ \ M_IF_METHOD(POP_MOVE, oplist)( \ static inline void \ M_C(name, _pop_move)(M_GET_SUBTYPE oplist *p, protect_t out) \ { \ m_mutex_lock (out->lock); \ M_CALL_POP_MOVE(oplist, p, out->data); \ m_mutex_unlock (out->lock); \ } \ ,) \ \ M_IF_METHOD(GET_STR, oplist)( \ static inline void \ M_C(name, _get_str)(string_t str, protect_t out, bool a) \ { \ m_mutex_lock (out->lock); \ M_CALL_GET_STR(oplist, str, out->data, a); \ m_mutex_unlock (out->lock); \ } \ ,) \ \ M_IF_METHOD(OUT_STR, oplist)( \ static inline void \ M_C(name, _out_str)(FILE *f, protect_t out) \ { \ m_mutex_lock (out->lock); \ M_CALL_OUT_STR(oplist, f, out->data); \ m_mutex_unlock (out->lock); \ } \ ,) \ \ M_IF_METHOD(PARSE_STR, oplist)( \ static inline bool \ M_C(name, _out_str)(protect_t out, const char str[], const char **e) \ { \ m_mutex_lock (out->lock); \ bool b = M_CALL_OUT_STR(oplist, out->data, str, e); \ m_mutex_unlock (out->lock); \ return b; \ } \ ,) \ \ M_IF_METHOD(IN_STR, oplist)( \ static inline bool \ M_C(name, _in_str)(protect_t out, FILE *f) \ { \ m_mutex_lock (out->lock); \ bool b = M_CALL_IN_STR(oplist, out->data, f); \ m_mutex_unlock (out->lock); \ return b; \ } \ ,) \ \ M_IF_METHOD(EQUAL, oplist)( \ static inline bool \ M_C(name, _equal)(protect_t out1, protect_t out2) \ { \ if (out1 < out2) { \ m_mutex_lock (out1->lock); \ m_mutex_lock (out2->lock); \ } else { \ m_mutex_lock (out2->lock); \ m_mutex_lock (out1->lock); \ } \ bool b = M_CALL_EQUAL(oplist, out1->data, out2->data); \ if (out1 < out2) { \ m_mutex_unlock (out2->lock); \ m_mutex_unlock (out1->lock); \ } else { \ m_mutex_unlock (out1->lock); \ m_mutex_unlock (out2->lock); \ } \ return b; \ } \ ,) \ #endif