/usr/include/pgm-5.2/pgm/mem.h is in libpgm-dev 5.2.122~dfsg-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* portable fail fast memory allocation.
*
* Copyright (c) 2010 Miru Limited.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif
#ifndef __PGM_MEM_H__
#define __PGM_MEM_H__
#ifdef HAVE_ALLOCA_H
# include <alloca.h>
#elif defined(_WIN32)
# include <malloc.h>
#else
# include <stdlib.h>
#endif
#include <pgm/types.h>
PGM_BEGIN_DECLS
extern bool pgm_mem_gc_friendly;
void* pgm_malloc (const size_t) PGM_GNUC_MALLOC PGM_GNUC_ALLOC_SIZE(1);
void* pgm_malloc_n (const size_t, const size_t) PGM_GNUC_MALLOC PGM_GNUC_ALLOC_SIZE2(1, 2);
void* pgm_malloc0 (const size_t) PGM_GNUC_MALLOC PGM_GNUC_ALLOC_SIZE(1);
void* pgm_malloc0_n (const size_t, const size_t) PGM_GNUC_MALLOC PGM_GNUC_ALLOC_SIZE2(1, 2);
void* pgm_memdup (const void*, const size_t) PGM_GNUC_MALLOC;
void* pgm_realloc (void*, const size_t) PGM_GNUC_WARN_UNUSED_RESULT;
void pgm_free (void*);
/* Convenience memory allocators that wont work well above 32-bit sizes
*/
#define pgm_new(struct_type, n_structs) \
((struct_type*)pgm_malloc_n ((size_t)sizeof(struct_type), (size_t)(n_structs)))
#define pgm_new0(struct_type, n_structs) \
((struct_type*)pgm_malloc0_n ((size_t)sizeof(struct_type), (size_t)(n_structs)))
#define pgm_alloca(size) \
alloca (size)
#define pgm_newa(struct_type, n_structs) \
((struct_type*) pgm_alloca (sizeof(struct_type) * (size_t)(n_structs)))
PGM_END_DECLS
#endif /* __PGM_MEM_H__ */
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