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/*
* Copyright © 2014 NVIDIA Corporation
*
* 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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 LIBDRM_LIBDRM_H
#define LIBDRM_LIBDRM_H
#if defined(HAVE_VISIBILITY)
# define drm_private __attribute__((visibility("hidden")))
#else
# define drm_private
#endif
/**
* Static (compile-time) assertion.
* Basically, use COND to dimension an array. If COND is false/zero the
* array size will be -1 and we'll get a compilation error.
*/
#define STATIC_ASSERT(COND) \
do { \
(void) sizeof(char [1 - 2*!(COND)]); \
} while (0)
#include <sys/mman.h>
#if defined(ANDROID) && !defined(__LP64__)
#include <errno.h> /* for EINVAL */
extern void *__mmap2(void *, size_t, int, int, int, size_t);
static inline void *drm_mmap(void *addr, size_t length, int prot, int flags,
int fd, loff_t offset)
{
/* offset must be aligned to 4096 (not necessarily the page size) */
if (offset & 4095) {
errno = EINVAL;
return MAP_FAILED;
}
return __mmap2(addr, length, prot, flags, fd, (size_t) (offset >> 12));
}
# define drm_munmap(addr, length) \
munmap(addr, length)
#else
/* assume large file support exists */
# define drm_mmap(addr, length, prot, flags, fd, offset) \
mmap(addr, length, prot, flags, fd, offset)
static inline int drm_munmap(void *addr, size_t length)
{
/* Copied from configure code generated by AC_SYS_LARGEFILE */
#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + \
(((off_t) 1 << 31) << 31))
STATIC_ASSERT(LARGE_OFF_T % 2147483629 == 721 &&
LARGE_OFF_T % 2147483647 == 1);
#undef LARGE_OFF_T
return munmap(addr, length);
}
#endif
#endif
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