From 6bc4446f02fdc34ee5c1391fb53c4c62e271d257 Mon Sep 17 00:00:00 2001
From: Rodrigo Kumpera <kumpera@gmail.com>
Date: Thu, 3 Nov 2011 11:49:42 -0200
Subject: [PATCH] Implement the icalls needed by the new mobile mmap code.

---
 mono/metadata/file-io.c   | 32 ++++++++++++++++++++++++++++++++
 mono/metadata/file-io.h   |  6 ++++++
 mono/metadata/icall-def.h |  7 +++++++
 3 files changed, 45 insertions(+)

diff --git a/mono/metadata/file-io.c b/mono/metadata/file-io.c
index b33d57508ec..6f1f3c3da50 100644
--- a/mono/metadata/file-io.c
+++ b/mono/metadata/file-io.c
@@ -1223,3 +1223,35 @@ void ves_icall_System_IO_MonoIO_Unlock (HANDLE handle, gint64 position,
 	}
 }
 
+//Support for io-layer free mmap'd files.
+
+#if (defined (__MACH__) && defined (TARGET_ARM)) || defined (TARGET_ANDROID)
+
+gint64
+mono_filesize_from_path (MonoString *string)
+{
+	struct stat buf;
+	gint64 res;
+	char *path = mono_string_to_utf8 (string);
+	
+	if (stat (path, &buf) == -1)
+		res = -1;
+	else
+		res = (gint64)buf.st_size;
+
+	g_free (path);
+	return res;
+}
+
+gint64
+mono_filesize_from_fd (int fd)
+{
+	struct stat buf;
+
+	if (fstat (fd, &buf) == -1)
+		return (gint64)-1;
+
+	return (gint64)buf.st_size;
+}
+
+#endif
diff --git a/mono/metadata/file-io.h b/mono/metadata/file-io.h
index 1ad78f60c36..f1951da2e44 100644
--- a/mono/metadata/file-io.h
+++ b/mono/metadata/file-io.h
@@ -251,6 +251,12 @@ ves_icall_System_IO_MonoIO_ReplaceFile (MonoString *sourceFileName, MonoString *
 					MonoString *destinationBackupFileName, MonoBoolean ignoreMetadataErrors,
 					gint32 *error) MONO_INTERNAL;
 
+extern gint64
+mono_filesize_from_path (MonoString *path);
+
+extern gint64
+mono_filesize_from_fd (int fd);
+
 G_END_DECLS
 
 #endif /* _MONO_METADATA_FILEIO_H_ */
diff --git a/mono/metadata/icall-def.h b/mono/metadata/icall-def.h
index 8d750e0e41f..5f2ade762eb 100644
--- a/mono/metadata/icall-def.h
+++ b/mono/metadata/icall-def.h
@@ -312,6 +312,13 @@ ICALL(INOW_1, "AddWatch", ves_icall_System_IO_InotifyWatcher_AddWatch)
 ICALL(INOW_2, "GetInotifyInstance", ves_icall_System_IO_InotifyWatcher_GetInotifyInstance)
 ICALL(INOW_3, "RemoveWatch", ves_icall_System_IO_InotifyWatcher_RemoveWatch)
 
+#if (defined (__MACH__) && defined (TARGET_ARM)) || defined (TARGET_ANDROID)
+ICALL_TYPE(MMAPIMPL, "System.IO.MemoryMappedFiles.MemoryMapImpl", MMAPIMPL_1)
+ICALL(MMAPIMPL_1, "mono_filesize_from_fd", mono_filesize_from_fd)
+ICALL(MMAPIMPL_2, "mono_filesize_from_path", mono_filesize_from_path)
+#endif
+
+
 ICALL_TYPE(MONOIO, "System.IO.MonoIO", MONOIO_1)
 ICALL(MONOIO_1, "Close(intptr,System.IO.MonoIOError&)", ves_icall_System_IO_MonoIO_Close)
 #ifndef PLATFORM_RO_FS
-- 
2.11.4.GIT