// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
-#if NET_4_0
+#if NET_4_0 || MOBILE
using System;
using System.IO;
using System.Collections.Generic;
using Microsoft.Win32.SafeHandles;
+using System.Runtime.InteropServices;
+
+
+#if !MOBILE
using Mono.Unix.Native;
using Mono.Unix;
-using System.Runtime.InteropServices;
+#else
+using System.Runtime.CompilerServices;
+#endif
namespace System.IO.MemoryMappedFiles
{
- public class MemoryMappedFile : IDisposable {
- MemoryMappedFileAccess fileAccess;
- string name;
- long fileCapacity;
-
- //
- // We allow the use of either the FileStream/keepOpen combo
- // or a Unix file descriptor. This way we avoid the dependency on
- // Mono's io-layer having the Unix file descriptors mapped to
- // the same io-layer handle
- //
- FileStream stream;
- bool keepOpen;
- int unix_fd;
-
- public static MemoryMappedFile CreateFromFile (FileStream fileStream)
- {
- if (fileStream == null)
- throw new ArgumentNullException ("fileStream");
-
- return new MemoryMappedFile () {
- stream = fileStream,
- fileAccess = MemoryMappedFileAccess.ReadWrite
- };
- }
-
- public static MemoryMappedFile CreateFromFile (string path)
- {
- return CreateFromFile (path, FileMode.Open, null, 0, MemoryMappedFileAccess.ReadWrite);
- }
-
- public static MemoryMappedFile CreateFromFile (string path, FileMode mode)
- {
- return CreateFromFile (path, mode, null, 0, MemoryMappedFileAccess.ReadWrite);
- }
-
- public static MemoryMappedFile CreateFromFile (string path, FileMode mode, string mapName)
- {
- return CreateFromFile (path, mode, mapName, 0, MemoryMappedFileAccess.ReadWrite);
- }
-
- public static MemoryMappedFile CreateFromFile (string path, FileMode mode, string mapName, long capacity)
- {
- return CreateFromFile (path, mode, mapName, capacity, MemoryMappedFileAccess.ReadWrite);
- }
-
+#if !MOBILE
+ internal static class MemoryMapImpl {
//
// Turns the FileMode into the first half of open(2) flags
//
}
}
- public static MemoryMappedFile CreateFromFile (string path, FileMode mode, string mapName, long capacity, MemoryMappedFileAccess access)
+ static MmapProts ToUnixProts (MemoryMappedFileAccess access)
{
- if (path == null)
- throw new ArgumentNullException ("path");
- if (path.Length == 0)
- throw new ArgumentException ("path");
- if (mapName != null && mapName.Length == 0)
- throw new ArgumentException ("mapName");
+ switch (access){
+ case MemoryMappedFileAccess.ReadWrite:
+ return MmapProts.PROT_WRITE | MmapProts.PROT_READ;
+
+ case MemoryMappedFileAccess.Write:
+ return MmapProts.PROT_WRITE;
+
+ case MemoryMappedFileAccess.CopyOnWrite:
+ return MmapProts.PROT_WRITE | MmapProts.PROT_READ;
+
+ case MemoryMappedFileAccess.ReadExecute:
+ return MmapProts.PROT_EXEC;
+
+ case MemoryMappedFileAccess.ReadWriteExecute:
+ return MmapProts.PROT_WRITE | MmapProts.PROT_READ | MmapProts.PROT_EXEC;
+
+ case MemoryMappedFileAccess.Read:
+ default:
+ return MmapProts.PROT_READ;
+ }
+ }
- int fd;
+ internal static int Open (string path, FileMode mode, long capacity, MemoryMappedFileAccess access)
+ {
if (MonoUtil.IsUnix){
Stat buf;
if (Syscall.stat (path, out buf) == -1)
if ((capacity == 0 && buf.st_size == 0) || (capacity > buf.st_size))
throw new ArgumentException ("capacity");
-
- fd = Syscall.open (path, ToUnixMode (mode) | ToUnixMode (access), FilePermissions.DEFFILEMODE);
+
+ int fd = Syscall.open (path, ToUnixMode (mode) | ToUnixMode (access), FilePermissions.DEFFILEMODE);
if (fd == -1)
UnixMarshal.ThrowExceptionForLastError ();
+ return fd;
} else
throw new NotImplementedException ();
+ }
+
+ internal static void CloseFD (int fd) {
+ Syscall.close (fd);
+ }
+
+ internal static void Flush (int fd) {
+ if (MonoUtil.IsUnix)
+ Syscall.fsync (fd);
+ else
+ throw new NotImplementedException ("Not implemented on Windows");
- return new MemoryMappedFile () {
- unix_fd = fd,
- fileAccess = access,
- name = mapName,
- fileCapacity = capacity
- };
+ }
+
+ static int pagesize;
+
+ internal static unsafe void Map (int file_handle, long offset, ref long size, MemoryMappedFileAccess access, out IntPtr map_addr, out int offset_diff)
+ {
+ if (!MonoUtil.IsUnix)
+ throw new NotImplementedException ("Not implemented on windows.");
+
+ if (pagesize == 0)
+ pagesize = Syscall.getpagesize ();
+
+ Stat buf;
+ Syscall.fstat (file_handle, out buf);
+ long fsize = buf.st_size;
+
+ if (size == 0 || size > fsize)
+ size = fsize;
+
+ // Align offset
+ long real_offset = offset & ~(pagesize - 1);
+
+ offset_diff = (int)(offset - real_offset);
+
+ // FIXME: Need to determine the unix fd for the file, Handle is only
+ // equal to it by accident
+ //
+ // The new API no longer uses FileStream everywhere, but exposes instead
+ // the filename (with one exception), we could move this API to use
+ // file descriptors instead of the FileStream plus its Handle.
+ //
+ map_addr = Syscall.mmap (IntPtr.Zero, (ulong) size,
+ ToUnixProts (access),
+ access == MemoryMappedFileAccess.CopyOnWrite ? MmapFlags.MAP_PRIVATE : MmapFlags.MAP_SHARED,
+ file_handle, real_offset);
+
+ if (map_addr == (IntPtr)(-1))
+ throw new IOException ("mmap failed for fd#" + file_handle + "(" + offset + ", " + size + ")");
+ }
+
+ internal static bool Unmap (IntPtr map_addr, ulong map_size)
+ {
+ if (!MonoUtil.IsUnix)
+ return false;
+ return Syscall.munmap (map_addr, map_size) == 0;
}
static void ConfigureUnixFD (IntPtr handle, HandleInheritability h)
}
- [DllImport("kernel32.dll", SetLastError = true)]
+ [DllImport("kernel32", SetLastError = true)]
static extern bool SetHandleInformation (IntPtr hObject, int dwMask, int dwFlags);
static void ConfigureWindowsFD (IntPtr handle, HandleInheritability h)
{
SetHandleInformation (handle, 1 /* FLAG_INHERIT */, h == HandleInheritability.None ? 0 : 1);
}
+
+ internal static void ConfigureFD (IntPtr handle, HandleInheritability inheritability)
+ {
+ if (MonoUtil.IsUnix)
+ ConfigureUnixFD (handle, inheritability);
+ else
+ ConfigureWindowsFD (handle, inheritability);
+ }
+
+ }
+#else
+ internal static class MemoryMapImpl {
+ [DllImport ("libc")]
+ static extern int fsync (int fd);
+
+ [DllImport ("libc")]
+ static extern int close (int fd);
+
+ [DllImport ("libc")]
+ static extern int fcntl (int fd, int cmd, int arg0);
+
+ //XXX check if android off_t is 64bits or not. on iOS / darwin it is.
+ [DllImport ("libc")]
+ static extern IntPtr mmap (IntPtr addr, IntPtr len, int prot, int flags, int fd, long offset);
+
+ [DllImport ("libc")]
+ static extern int munmap (IntPtr addr, IntPtr size);
+
+ [DllImport ("libc", SetLastError=true)]
+ static extern int open (string path, int flags, int access);
+
+ [DllImport ("libc")]
+ static extern int getpagesize ();
+
+ [MethodImplAttribute (MethodImplOptions.InternalCall)]
+ static extern long mono_filesize_from_path (string str);
+
+ [MethodImplAttribute (MethodImplOptions.InternalCall)]
+ static extern long mono_filesize_from_fd (int fd);
+
+ //Values valid on iOS/OSX and android ndk r6
+ const int F_GETFD = 1;
+ const int F_SETFD = 2;
+ const int FD_CLOEXEC = 1;
+ const int DEFFILEMODE = 0x666;
+
+ const int O_RDONLY = 0x0;
+ const int O_WRONLY = 0x1;
+ const int O_RDWR = 0x2;
+
+ const int PROT_READ = 0x1;
+ const int PROT_WRITE = 0x2;
+ const int PROT_EXEC = 0x4;
+
+ const int MAP_PRIVATE = 0x2;
+ const int MAP_SHARED = 0x1;
+
+ const int EINVAL = 22;
+
+#if MONODROID
+ const int O_CREAT = 0x040;
+ const int O_TRUNC = 0x080;
+ const int O_EXCL = 0x200;
+
+ const int ENAMETOOLONG = 63;
+#else
+ /* MONOTOUCH */
+ const int O_CREAT = 0x0200;
+ const int O_TRUNC = 0x0400;
+ const int O_EXCL = 0x0800;
+
+ const int ENAMETOOLONG = 36;
+#endif
+
+ static int ToUnixMode (FileMode mode)
+ {
+ switch (mode) {
+ case FileMode.CreateNew:
+ return O_CREAT | O_EXCL;
+
+ case FileMode.Create:
+ return O_CREAT | O_TRUNC;
+
+ case FileMode.OpenOrCreate:
+ return O_CREAT;
+
+ case FileMode.Truncate:
+ return O_TRUNC;
+ default:
+ case FileMode.Open:
+ return 0;
+ }
+ }
+
+ //
+ // Turns the MemoryMappedFileAccess into the second half of open(2) flags
+ //
+ static int ToUnixMode (MemoryMappedFileAccess access)
+ {
+ switch (access) {
+ case MemoryMappedFileAccess.CopyOnWrite:
+ case MemoryMappedFileAccess.ReadWriteExecute:
+ case MemoryMappedFileAccess.ReadWrite:
+ return O_RDWR;
+
+ case MemoryMappedFileAccess.Write:
+ return O_WRONLY;
+
+ case MemoryMappedFileAccess.ReadExecute:
+ case MemoryMappedFileAccess.Read:
+ default:
+ return O_RDONLY;
+ }
+ }
+
+ static int ToUnixProts (MemoryMappedFileAccess access)
+ {
+ switch (access){
+ case MemoryMappedFileAccess.ReadWrite:
+ return PROT_WRITE | PROT_READ;
+
+ case MemoryMappedFileAccess.Write:
+ return PROT_WRITE;
+
+ case MemoryMappedFileAccess.CopyOnWrite:
+ return PROT_WRITE | PROT_READ;
+
+ case MemoryMappedFileAccess.ReadExecute:
+ return PROT_EXEC;
+
+ case MemoryMappedFileAccess.ReadWriteExecute:
+ return PROT_WRITE | PROT_READ | PROT_EXEC;
+
+ case MemoryMappedFileAccess.Read:
+ default:
+ return PROT_READ;
+ }
+ }
+
+ static void ThrowErrorFromErrno (int errno)
+ {
+ switch (errno) {
+ case EINVAL: throw new ArgumentException ();
+ case ENAMETOOLONG: throw new PathTooLongException ();
+ default: throw new IOException ("Failed with errno " + errno);
+ }
+ }
+
+ internal static int Open (string path, FileMode mode, long capacity, MemoryMappedFileAccess access)
+ {
+ long file_size = mono_filesize_from_path (path);
+ if (file_size < 0)
+ throw new FileNotFoundException (path);
+
+ if ((capacity == 0 && file_size == 0) || (capacity > file_size))
+ throw new ArgumentException ("capacity");
+
+ int fd = open (path, ToUnixMode (mode) | ToUnixMode (access), DEFFILEMODE);
+
+ if (fd == -1)
+ ThrowErrorFromErrno (Marshal.GetLastWin32Error ());
+ return fd;
+ }
+
+ internal static void CloseFD (int fd)
+ {
+ close (fd);
+ }
+
+ internal static void Flush (int fd)
+ {
+ fsync (fd);
+ }
+
+ internal static bool Unmap (IntPtr map_addr, ulong map_size)
+ {
+ return munmap (map_addr, (IntPtr)map_size) == 0;
+ }
+
+ static int pagesize;
+
+ internal static unsafe void Map (int file_handle, long offset, ref long size, MemoryMappedFileAccess access, out IntPtr map_addr, out int offset_diff)
+ {
+ if (pagesize == 0)
+ pagesize = getpagesize ();
+
+ long fsize = mono_filesize_from_fd (file_handle);
+ if (fsize < 0)
+ throw new FileNotFoundException ();
+
+ if (size == 0 || size > fsize)
+ size = fsize;
+
+ // Align offset
+ long real_offset = offset & ~(pagesize - 1);
+
+ offset_diff = (int)(offset - real_offset);
+
+ map_addr = mmap (IntPtr.Zero, (IntPtr) size,
+ ToUnixProts (access),
+ access == MemoryMappedFileAccess.CopyOnWrite ? MAP_PRIVATE : MAP_SHARED,
+ file_handle, real_offset);
+
+ if (map_addr == (IntPtr)(-1))
+ throw new IOException ("mmap failed for fd#" + file_handle + "(" + offset + ", " + size + ")");
+ }
+
+ internal static void ConfigureFD (IntPtr handle, HandleInheritability inheritability)
+ {
+ int fd = (int)handle;
+ int flags = fcntl (fd, F_GETFD, 0);
+ if (inheritability == HandleInheritability.None)
+ flags &= ~FD_CLOEXEC;
+ else
+ flags |= FD_CLOEXEC;
+ fcntl (fd, F_SETFD, flags);
+ }
+
+ }
+#endif
+
+ public class MemoryMappedFile : IDisposable {
+ MemoryMappedFileAccess fileAccess;
+ string name;
+ long fileCapacity;
+
+ //
+ // We allow the use of either the FileStream/keepOpen combo
+ // or a Unix file descriptor. This way we avoid the dependency on
+ // Mono's io-layer having the Unix file descriptors mapped to
+ // the same io-layer handle
+ //
+ FileStream stream;
+ bool keepOpen;
+ int unix_fd;
+
+ public static MemoryMappedFile CreateFromFile (string path)
+ {
+ return CreateFromFile (path, FileMode.Open, null, 0, MemoryMappedFileAccess.ReadWrite);
+ }
+
+ public static MemoryMappedFile CreateFromFile (string path, FileMode mode)
+ {
+ return CreateFromFile (path, mode, null, 0, MemoryMappedFileAccess.ReadWrite);
+ }
+
+ public static MemoryMappedFile CreateFromFile (string path, FileMode mode, string mapName)
+ {
+ return CreateFromFile (path, mode, mapName, 0, MemoryMappedFileAccess.ReadWrite);
+ }
+ public static MemoryMappedFile CreateFromFile (string path, FileMode mode, string mapName, long capacity)
+ {
+ return CreateFromFile (path, mode, mapName, capacity, MemoryMappedFileAccess.ReadWrite);
+ }
+
+ public static MemoryMappedFile CreateFromFile (string path, FileMode mode, string mapName, long capacity, MemoryMappedFileAccess access)
+ {
+ if (path == null)
+ throw new ArgumentNullException ("path");
+ if (path.Length == 0)
+ throw new ArgumentException ("path");
+ if (mapName != null && mapName.Length == 0)
+ throw new ArgumentException ("mapName");
+ if (mode == FileMode.Append)
+ throw new ArgumentException ("mode");
+
+ int fd = MemoryMapImpl.Open (path, mode, capacity, access);
+
+ return new MemoryMappedFile () {
+ unix_fd = fd,
+ fileAccess = access,
+ name = mapName,
+ fileCapacity = capacity
+ };
+ }
+
+#if MOBILE
+ public static MemoryMappedFile CreateFromFile (FileStream fileStream, string mapName, long capacity, MemoryMappedFileAccess access,
+ HandleInheritability inheritability,
+ bool leaveOpen)
+#else
[MonoLimitation ("memoryMappedFileSecurity is currently ignored")]
public static MemoryMappedFile CreateFromFile (FileStream fileStream, string mapName, long capacity, MemoryMappedFileAccess access,
MemoryMappedFileSecurity memoryMappedFileSecurity, HandleInheritability inheritability,
bool leaveOpen)
+#endif
{
if (fileStream == null)
throw new ArgumentNullException ("fileStream");
if ((capacity == 0 && fileStream.Length == 0) || (capacity > fileStream.Length))
throw new ArgumentException ("capacity");
- if (MonoUtil.IsUnix)
- ConfigureUnixFD (fileStream.Handle, inheritability);
- else
- ConfigureWindowsFD (fileStream.Handle, inheritability);
+ MemoryMapImpl.ConfigureFD (fileStream.Handle, inheritability);
return new MemoryMappedFile () {
stream = fileStream,
[MonoLimitation ("CreateNew requires that mapName be a file name on Unix")]
public static MemoryMappedFile CreateNew (string mapName, long capacity)
{
+#if MOBILE
+ return CreateNew (mapName, capacity, MemoryMappedFileAccess.ReadWrite, MemoryMappedFileOptions.DelayAllocatePages, 0);
+#else
return CreateNew (mapName, capacity, MemoryMappedFileAccess.ReadWrite, MemoryMappedFileOptions.DelayAllocatePages, null, 0);
+#endif
}
[MonoLimitation ("CreateNew requires that mapName be a file name on Unix")]
public static MemoryMappedFile CreateNew (string mapName, long capacity, MemoryMappedFileAccess access)
{
+#if MOBILE
+ return CreateNew (mapName, capacity, access, MemoryMappedFileOptions.DelayAllocatePages, 0);
+#else
return CreateNew (mapName, capacity, access, MemoryMappedFileOptions.DelayAllocatePages, null, 0);
+#endif
}
+#if MOBILE
+ public static MemoryMappedFile CreateNew (string mapName, long capacity, MemoryMappedFileAccess access,
+ MemoryMappedFileOptions options,
+ HandleInheritability handleInheritability)
+#else
[MonoLimitation ("CreateNew requires that mapName be a file name on Unix; options and memoryMappedFileSecurity are ignored")]
public static MemoryMappedFile CreateNew (string mapName, long capacity, MemoryMappedFileAccess access,
MemoryMappedFileOptions options, MemoryMappedFileSecurity memoryMappedFileSecurity,
- HandleInheritability handleInheritability)
+ HandleInheritability inheritability)
+#endif
{
return CreateFromFile (mapName, FileMode.CreateNew, mapName, capacity, access);
}
return CreateFromFile (mapName, FileMode.OpenOrCreate, mapName, capacity, access);
}
- /*
[MonoTODO]
- public static MemoryMappedFile CreateOrOpen (string mapName, long capacity, MemoryMappedFileAccess access, MemoryMappedFileOptions options, MemoryMappedFileSecurity memoryMappedFileSecurity, HandleInheritability handleInheritability) {
+#if MOBILE
+ public static MemoryMappedFile CreateOrOpen (string mapName, long capacity, MemoryMappedFileAccess access, MemoryMappedFileOptions options, HandleInheritability inheritability)
+#else
+ public static MemoryMappedFile CreateOrOpen (string mapName, long capacity, MemoryMappedFileAccess access, MemoryMappedFileOptions options, MemoryMappedFileSecurity memoryMappedFileSecurity, HandleInheritability inheritability)
+#endif
+ {
+ throw new NotImplementedException ();
+ }
+
+ [MonoTODO]
+ public static MemoryMappedFile OpenExisting (string mapName)
+ {
+ throw new NotImplementedException ();
+ }
+
+ [MonoTODO]
+ public static MemoryMappedFile OpenExisting (string mapName, MemoryMappedFileRights desiredAccessRights)
+ {
+ throw new NotImplementedException ();
+ }
+
+ [MonoTODO]
+ public static MemoryMappedFile OpenExisting (string mapName, MemoryMappedFileRights desiredAccessRights, HandleInheritability inheritability)
+ {
throw new NotImplementedException ();
}
- */
public MemoryMappedViewStream CreateViewStream ()
{
if (keepOpen == false)
stream.Close ();
unix_fd = -1;
+ stream = null;
+ }
+ if (unix_fd != -1) {
+ MemoryMapImpl.CloseFD (unix_fd);
+ unix_fd = -1;
}
- if (unix_fd != -1)
- Syscall.close (unix_fd);
- unix_fd = -1;
- stream = null;
- }
- }
-
- [MonoTODO]
- public SafeMemoryMappedFileHandle SafeMemoryMappedFileHandle {
- get {
- throw new NotImplementedException ();
}
}
- static int pagesize;
-
- static MmapProts ToUnixProts (MemoryMappedFileAccess access)
+#if !MOBILE
+ [MonoTODO]
+ public MemoryMappedFileSecurity GetAccessControl ()
{
- MmapProts prots;
-
- switch (access){
- case MemoryMappedFileAccess.ReadWrite:
- return MmapProts.PROT_WRITE | MmapProts.PROT_READ;
- break;
-
- case MemoryMappedFileAccess.Write:
- return MmapProts.PROT_WRITE;
-
- case MemoryMappedFileAccess.CopyOnWrite:
- return MmapProts.PROT_WRITE | MmapProts.PROT_READ;
-
- case MemoryMappedFileAccess.ReadExecute:
- return MmapProts.PROT_EXEC;
-
- case MemoryMappedFileAccess.ReadWriteExecute:
- return MmapProts.PROT_WRITE | MmapProts.PROT_READ | MmapProts.PROT_EXEC;
-
- case MemoryMappedFileAccess.Read:
- default:
- return MmapProts.PROT_READ;
- }
+ throw new NotImplementedException ();
}
- internal static unsafe void MapPosix (int file_handle, long offset, ref long size, MemoryMappedFileAccess access, out IntPtr map_addr, out int offset_diff)
+ [MonoTODO]
+ public void SetAccessControl (MemoryMappedFileSecurity memoryMappedFileSecurity)
{
- if (pagesize == 0)
- pagesize = Syscall.getpagesize ();
-
- Stat buf;
- Syscall.fstat (file_handle, out buf);
- long fsize = buf.st_size;
-
- if (size == 0 || size > fsize)
- size = fsize;
-
- // Align offset
- long real_offset = offset & ~(pagesize - 1);
-
- offset_diff = (int)(offset - real_offset);
-
- // FIXME: Need to determine the unix fd for the file, Handle is only
- // equal to it by accident
- //
- // The new API no longer uses FileStream everywhere, but exposes instead
- // the filename (with one exception), we could move this API to use
- // file descriptors instead of the FileStream plus its Handle.
- //
- map_addr = Syscall.mmap (IntPtr.Zero, (ulong) size,
- ToUnixProts (access),
- access == MemoryMappedFileAccess.CopyOnWrite ? MmapFlags.MAP_PRIVATE : MmapFlags.MAP_SHARED,
- file_handle, real_offset);
-
- if (map_addr == (IntPtr)(-1))
- throw new IOException ("mmap failed for fd#" + file_handle + "(" + offset + ", " + size + ")");
+ throw new NotImplementedException ();
}
+#endif
- internal static bool UnmapPosix (IntPtr map_addr, ulong map_size)
- {
- return Syscall.munmap (map_addr, map_size) == 0;
+ [MonoTODO]
+ public SafeMemoryMappedFileHandle SafeMemoryMappedFileHandle {
+ get {
+ throw new NotImplementedException ();
+ }
}
-
}
}
-#endif
\ No newline at end of file
+#endif
projects / mono.git / blobdiff