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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 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
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