/*

 * 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 HAVE_VISIBILITY

#  define drm_private __attribute__((visibility("hidden")))

#  define drm_public  __attribute__((visibility("default")))

#else

#  define drm_private

#  define drm_public

#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 */

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 mmap64(addr, length, prot, flags, fd, offset);

}

#  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