IABSD.fr/xenocara/lib/libdrm/libdrm_macros.h

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• Author : jsg
  Date : 2019-11-27 02:17:47
  Hash : 94e5bba0
  Message : Merge libdrm 2.4.100

• lib/libdrm/libdrm_macros.h

• /*
   * 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