You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
85 lines
2.6 KiB
85 lines
2.6 KiB
/* |
|
* 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"))) |
|
#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 */ |
|
|
|
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
|
|
|