/usr/include/yaz/shptr.h is in libyaz4-dev 4.2.30-2.1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 | /* This file is part of the YAZ toolkit.
* Copyright (C) 1995-2012 Index Data.
* 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.
* * Neither the name of Index Data nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 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.
*/
/**
* \file shptr.h
* \brief Shared pointer macros
*/
#ifndef YAZ_SHARED_PTR_H
#define YAZ_SHARED_PTR_H
#include <yaz/xmalloc.h>
#include <yaz/mutex.h>
YAZ_BEGIN_CDECL
#define YAZ_SHPTR_TYPE(type) \
struct type##_shptr \
{ \
type ptr; \
int ref; \
YAZ_MUTEX mutex; \
}; \
typedef struct type##_shptr *type##_shptr_t;
#define YAZ_SHPTR_INIT(p,n) { \
p = xmalloc(sizeof(*p)); \
p->ptr = n; \
p->ref = 1; \
p->mutex = 0; \
yaz_mutex_create(&p->mutex); \
}
#define YAZ_SHPTR_INC(p) { \
yaz_mutex_enter(p->mutex); \
p->ref++; \
yaz_mutex_leave(p->mutex); \
}
#define YAZ_SHPTR_DEC(p, destroy) { \
yaz_mutex_enter(p->mutex); \
if (--p->ref == 0) { \
yaz_mutex_leave(p->mutex); \
destroy(p->ptr); \
yaz_mutex_destroy(&p->mutex); \
xfree(p); \
p = 0; \
} else { \
yaz_mutex_leave(p->mutex); \
} \
}
YAZ_END_CDECL
#endif
/*
* Local variables:
* c-basic-offset: 4
* c-file-style: "Stroustrup"
* indent-tabs-mode: nil
* End:
* vim: shiftwidth=4 tabstop=8 expandtab
*/
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