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-rw-r--r--libdrm_macros.h87
1 files changed, 87 insertions, 0 deletions
diff --git a/libdrm_macros.h b/libdrm_macros.h
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+++ b/libdrm_macros.h
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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