1 files changed, 89 insertions, 0 deletions
diff --git a/winsup/cygwin/local_includes/mmap_helper.h b/winsup/cygwin/local_includes/mmap_helper.h
new file mode 100644
index 000000000..645c5e3aa
--- /dev/null
+++ b/winsup/cygwin/local_includes/mmap_helper.h
@@ -0,0 +1,89 @@
+/* mmap_helper.h
+
+This file is part of Cygwin.
+
+This software is a copyrighted work licensed under the terms of the
+Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
+details. */
+
+#ifndef _MMAP_HELPER_H
+#define _MMAP_HELPER_H
+#define _MMIOWRAP(__ptr, __len, __func) \
+({ \
+  BOOL __res; \
+  for (int __i = 0; __i < 2; __i++) \
+    { \
+      __res = __func; \
+      if (__res || __i > 0) \
+	break; \
+      DWORD __errcode = GetLastError (); \
+      if (__errcode != ERROR_NOACCESS) \
+	break; \
+      switch (mmap_is_attached_or_noreserve (__ptr, __len)) \
+	{ \
+	case MMAP_NORESERVE_COMMITED: \
+	  continue; \
+	case MMAP_RAISE_SIGBUS: \
+	  raise(SIGBUS); \
+	default: \
+	  break; \
+	} \
+      break; \
+    } \
+  __res; \
+})
+
+#define _MMSOCKWRAP(__ptr, __count, __func) \
+({ \
+  int __res; \
+  for (int __i = 0; __i < 2; __i++) \
+    { \
+      __res = __func; \
+      if (!__res || __i > 0) \
+	break; \
+      DWORD __errcode = WSAGetLastError (); \
+      if (__errcode != WSAEFAULT) \
+	break; \
+      for (unsigned __j = 0; __j < __count; __j++) \
+	switch (mmap_is_attached_or_noreserve (__ptr[__j].buf, __ptr[__j].len)) \
+	  { \
+	  case MMAP_NORESERVE_COMMITED: \
+	    goto keeptrying; \
+	  case MMAP_RAISE_SIGBUS: \
+	    raise(SIGBUS); \
+	  default: \
+	    break; \
+	  } \
+      break; \
+    keeptrying: \
+      continue; \
+    } \
+  __res; \
+})
+
+extern inline BOOL
+mmReadFile (HANDLE hFile, LPVOID lpBuffer, DWORD nNumberOfBytesToRead,
+	    LPDWORD lpNumberOfBytesRead, LPOVERLAPPED lpOverlapped)
+{
+  return _MMIOWRAP (lpBuffer, nNumberOfBytesToRead,
+		    (ReadFile (hFile, lpBuffer, nNumberOfBytesToRead,
+			       lpNumberOfBytesRead, lpOverlapped)));
+}
+
+#ifdef _WINSOCK_H
+extern inline int
+mmWSARecvFrom (SOCKET s, LPWSABUF lpBuffers, DWORD dwBufferCount,
+	    LPDWORD lpNumberOfBytesRecvd, LPDWORD lpFlags,
+	    struct sockaddr* lpFrom,
+	    LPINT lpFromlen, LPWSAOVERLAPPED lpOverlapped,
+	    LPWSAOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine)
+{
+  return _MMSOCKWRAP (lpBuffers, dwBufferCount,
+		      (mmWSARecvFrom(s, lpBuffers, dwBufferCount,
+				     lpNumberOfBytesRecvd, lpFlags, lpFrom,
+				     lpFromlen, lpOverlapped,
+				     lpCompletionRoutine)));
+}
+#endif /*_WINSOCK_H*/
+
+#endif /*_MMAP_HELPER_H*/