[utils] Add check for ANDROID_UNIFIED_HEADERS to mono-compiler.h (#5742)

[mono.git] / mono / utils / mono-compiler.h

diff --git a/mono/utils/mono-compiler.h b/mono/utils/mono-compiler.h
index 746c84fb5131455564551cf4186402cbf41820f0..f8481d004d10e34da4cf629fef17b4bf38190137 100644 (file)
--- a/mono/utils/mono-compiler.h
+++ b/mono/utils/mono-compiler.h
@@ -10,6 +10,9 @@
  * compiler behaviours.
  */
 #include <config.h>
+#if defined(HAVE_UNISTD_H)
+#include <unistd.h>
+#endif
 
 #ifdef __GNUC__
 #define MONO_ATTR_USED __attribute__ ((__used__))
@@ -74,7 +77,7 @@ typedef SSIZE_T ssize_t;
 #define MONO_EMPTY_SOURCE_FILE(x)
 #endif
 
-#if !defined(_MSC_VER) && !defined(PLATFORM_SOLARIS) && !defined(_WIN32) && !defined(__CYGWIN__) && !defined(MONOTOUCH) && HAVE_VISIBILITY_HIDDEN
+#if !defined(_MSC_VER) && !defined(HOST_SOLARIS) && !defined(_WIN32) && !defined(__CYGWIN__) && !defined(MONOTOUCH) && HAVE_VISIBILITY_HIDDEN
 #if MONO_LLVM_LOADED
 #define MONO_LLVM_INTERNAL MONO_API
 #else
@@ -130,5 +133,37 @@ typedef SSIZE_T ssize_t;
 #define MONO_NO_SANITIZE_THREAD
 #endif
 
+/* Used when building with Android NDK's unified headers */
+#if defined(HOST_ANDROID) && defined (ANDROID_UNIFIED_HEADERS)
+#if __ANDROID_API__ < 21
+
+typedef int32_t __mono_off32_t;
+
+#ifdef HAVE_SYS_MMAN_H
+#include <sys/mman.h>
+#endif
+
+#if !defined(mmap)
+/* Unified headers before API 21 do not declare mmap when LARGE_FILES are used (via -D_FILE_OFFSET_BITS=64)
+ * which is always the case when Mono build targets Android. The problem here is that the unified headers
+ * map `mmap` to `mmap64` if large files are enabled but this api exists only in API21 onwards. Therefore
+ * we must carefully declare the 32-bit mmap here without changing the ABI along the way. Carefully because
+ * in this instance off_t is redeclared to be 64-bit and that's not what we want.
+ */
+void* mmap (void*, size_t, int, int, int, __mono_off32_t);
+#endif /* !mmap */
+
+#ifdef HAVE_SYS_SENDFILE_H
+#include <sys/sendfile.h>
+#endif
+
+#if !defined(sendfile)
+/* The same thing as with mmap happens with sendfile */
+ssize_t sendfile (int out_fd, int in_fd, __mono_off32_t* offset, size_t count);
+#endif /* !sendfile */
+
+#endif /* __ANDROID_API__ < 21 */
+#endif /* HOST_ANDROID && ANDROID_UNIFIED_HEADERS */
+
 #endif /* __UTILS_MONO_COMPILER_H__*/