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/******************************************************************************
*
* Name: cpl_userfault.h
* Project: CPL - Common Portability Library
* Purpose: Use userfaultfd and VSIL to service page faults
* Author: James McClain, <james.mcclain@gmail.com>
*
******************************************************************************
* Copyright (c) 2018, Dr. James McClain <james.mcclain@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
****************************************************************************/
#ifndef CPL_USERFAULTFD
#define CPL_USERFAULTFD
#include <stdint.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <linux/userfaultfd.h>
#define GDAL_UFFD_LIMIT "GDAL_UFFD_LIMIT"
typedef struct cpl_uffd_context cpl_uffd_context;
bool CPL_DLL CPLIsUserFaultMappingSupported();
cpl_uffd_context CPL_DLL *CPLCreateUserFaultMapping(const char *pszFilename,
void **ppVma,
uint64_t *pnVmaSize);
void CPL_DLL CPLDeleteUserFaultMapping(cpl_uffd_context *ctx);
#endif
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