/******************************************************************************
*
* Copyright (c) 2015 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer.
*
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
*
* MemoryMap.h
*
*****************************************************************************/
#pragma once
#include <oz++/CommonObject.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/mman.h>
namespace OZ {
class MemoryMap :public CommonObject {
private:
void* memory;
size_t size;
public:
MemoryMap()
:memory(NULL),
length(0)
{
}
MemoryMap(size_t length, int prot, int flags,
int fd, off_t offset)
:memory(NULL),
length(0)
{
memory = map(NULL, length, prot, flags, fd, offset);
}
public:
MemoryMap(void *addr, size_t length, int prot, int flags,
int fd, off_t offset)
:memory(NULL),
length(0)
{
memory = map(addr, length, prot, flags, fd, offset);
}
~MemoryMap()
{
unmap();
}
int unmap()
{
int rc = -1;
if (memory != NULL && length > 0) {
rc = munmap(memory, length);
memory = NULL;
length = 0;
}
return rc;
}
void* map(void* addr, size_t length, int prot, int flags,
int fd, off_t offset)
{
if (memory != NULL) {
unmap();
}
this -> memory = NULL;
memory = mmap(addr, length, prot, flags, fd, offset);
if (memory == MAP_FAILED ) {
throw IException("Failed to mmap: %s", strerror(errno));
}
this -> length = length;
return memory;
}
void* getMemory()
{
return this -> memory;
}
size_t getLength()
{
return this -> length;
}
};
}