93 lines
2.5 KiB
C++
93 lines
2.5 KiB
C++
/*
|
|
* Copyright (C) 2013 Max Kellermann <max@duempel.org>
|
|
*
|
|
* 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 COPYRIGHT HOLDERS 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
|
|
* FOUNDATION OR 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 HUGE_ALLOCATOR_HXX
|
|
#define HUGE_ALLOCATOR_HXX
|
|
|
|
#include "Compiler.h"
|
|
|
|
#include <stddef.h>
|
|
|
|
#ifdef __linux__
|
|
|
|
/**
|
|
* Allocate a huge amount of memory. This will be done in a way that
|
|
* allows giving the memory back to the kernel as soon as we don't
|
|
* need it anymore. On the downside, this call is expensive.
|
|
*/
|
|
gcc_malloc
|
|
void *
|
|
HugeAllocate(size_t size);
|
|
|
|
/**
|
|
* @param p an allocation returned by HugeAllocate()
|
|
* @param size the allocation's size as passed to HugeAllocate()
|
|
*/
|
|
void
|
|
HugeFree(void *p, size_t size);
|
|
|
|
/**
|
|
* Discard any data stored in the allocation and give the memory back
|
|
* to the kernel. After returning, the allocation still exists and
|
|
* can be reused at any time, but its contents are undefined.
|
|
*
|
|
* @param p an allocation returned by HugeAllocate()
|
|
* @param size the allocation's size as passed to HugeAllocate()
|
|
*/
|
|
void
|
|
HugeDiscard(void *p, size_t size);
|
|
|
|
#else
|
|
|
|
/* not Linux: fall back to standard C calls */
|
|
|
|
#include <stdlib.h>
|
|
|
|
gcc_malloc
|
|
static inline void *
|
|
HugeAllocate(size_t size)
|
|
{
|
|
return malloc(size);
|
|
}
|
|
|
|
static inline void
|
|
HugeFree(void *p, size_t)
|
|
{
|
|
free(p);
|
|
}
|
|
|
|
static inline void
|
|
HugeDiscard(void *, size_t)
|
|
{
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif
|