mirror of
https://github.com/cjdelisle/cjdns
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65 lines
2.4 KiB
C
65 lines
2.4 KiB
C
/* vim: set expandtab ts=4 sw=4: */
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/*
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* You may redistribute this program and/or modify it under the terms of
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* the GNU General Public License as published by the Free Software Foundation,
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* either version 3 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef Identity_H
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#define Identity_H
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#include "util/Assert.h"
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#include <stdint.h>
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#if defined(Identity_CHECK)
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#define Identity_MAGIC CJDNS_RAND_U64_PER_FILE
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/** This goes in each structure which will be checked. */
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#define Identity uintptr_t Identity_verifier;
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#define Identity_set(pointer) \
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(pointer)->Identity_verifier = Identity_MAGIC
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#define Identity_check(pointer) \
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(__extension__ ({ \
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__typeof__(pointer) Identity_ptr = (pointer); \
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Assert_true(Identity_ptr->Identity_verifier == Identity_MAGIC); \
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Identity_ptr; \
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}))
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#define Identity_ncheck(pointer) \
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(__extension__ ({ \
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__typeof__(pointer) Identity_ptr = (pointer); \
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Assert_true(!Identity_ptr || Identity_ptr->Identity_verifier == Identity_MAGIC); \
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Identity_ptr; \
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}))
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#else
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#define Identity
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#define Identity_set(pointer)
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#define Identity_check(pointer) \
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(__extension__ ({ \
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(pointer); \
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}))
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#define Identity_ncheck(pointer) Identity_check(pointer)
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#endif
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#define Identity_containerOf(ptr, type, member) \
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(__extension__ ({ \
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const __typeof__(((type*)0)->member)*__mptr = (ptr); \
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Identity_check( (type*)((char*)__mptr - offsetof(type, member)) ); \
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}))
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#endif
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