From 716ffc5bef496d945423bae3c7aa24eaf2e41e2a Mon Sep 17 00:00:00 2001
From: Bill Medland <medbi01@accpac.com>
Date: Wed, 20 Mar 2002 22:50:38 +0000
Subject: [PATCH] Connect the msvcrt file byte locking up to ntdll.

---
 dlls/msvcrt/file.c           | 55 ++++++++++++++++++++++++++++++++++++++++++++
 dlls/msvcrt/msvcrt.spec      |  2 +-
 include/Makefile.in          |  1 +
 include/msvcrt/sys/locking.h | 30 ++++++++++++++++++++++++
 4 files changed, 87 insertions(+), 1 deletion(-)
 create mode 100644 include/msvcrt/sys/locking.h

diff --git a/dlls/msvcrt/file.c b/dlls/msvcrt/file.c
index 4dbeb86edb9..1ea9961d685 100644
--- a/dlls/msvcrt/file.c
+++ b/dlls/msvcrt/file.c
@@ -32,6 +32,7 @@
 #include "msvcrt/direct.h"
 #include "msvcrt/fcntl.h"
 #include "msvcrt/io.h"
+#include "msvcrt/sys/locking.h"
 #include "msvcrt/stdio.h"
 #include "msvcrt/stdlib.h"
 #include "msvcrt/string.h"
@@ -508,6 +509,60 @@ LONG _lseek(int fd, LONG offset, int whence)
 }
 
 /*********************************************************************
+ *		_locking (MSVCRT.@)
+ *
+ * This is untested; the underlying LockFile doesn't work yet.
+ */
+int _locking(int fd, int mode, LONG nbytes)
+{
+  BOOL ret;
+  DWORD cur_locn;
+  HANDLE hand = msvcrt_fdtoh(fd);
+
+  TRACE(":fd (%d) handle (%d)\n",fd,hand);
+  if (hand == INVALID_HANDLE_VALUE)
+    return -1;
+
+  if (mode < 0 || mode > 4)
+  {
+    SET_THREAD_VAR(errno,MSVCRT_EINVAL);
+    return -1;
+  }
+
+  TRACE(":fd (%d) by 0x%08lx mode %s\n",
+        fd,nbytes,(mode==_LK_UNLCK)?"_LK_UNLCK":
+        (mode==_LK_LOCK)?"_LK_LOCK":
+        (mode==_LK_NBLCK)?"_LK_NBLCK":
+        (mode==_LK_RLCK)?"_LK_RLCK":
+        (mode==_LK_NBRLCK)?"_LK_NBRLCK":
+                          "UNKNOWN");
+
+  if ((cur_locn = SetFilePointer(hand, 0L, NULL, SEEK_CUR)) == 0xffffffff)
+  {
+    FIXME ("Seek failed\n");
+    SET_THREAD_VAR(errno,MSVCRT_EINVAL); /* FIXME */
+    return -1;
+  }
+  if (mode == _LK_LOCK || mode == _LK_RLCK)
+  {
+    int nretry = 10;
+    ret = 1; /* just to satisfy gcc */
+    while (nretry--)
+    {
+      ret = LockFile(hand, cur_locn, 0L, nbytes, 0L);
+      if (ret) break;
+      sleep (1);
+    }
+  }
+  else if (mode == _LK_UNLCK)
+    ret = UnlockFile(hand, cur_locn, 0L, nbytes, 0L);
+  else
+    ret = LockFile(hand, cur_locn, 0L, nbytes, 0L);
+  /* FIXME - what about error settings? */
+  return ret ? 0 : -1;
+}
+
+/*********************************************************************
  *		rewind (MSVCRT.@)
  */
 void MSVCRT_rewind(MSVCRT_FILE* file)
diff --git a/dlls/msvcrt/msvcrt.spec b/dlls/msvcrt/msvcrt.spec
index 471298adee1..17d31c809b7 100644
--- a/dlls/msvcrt/msvcrt.spec
+++ b/dlls/msvcrt/msvcrt.spec
@@ -326,7 +326,7 @@ debug_channels (msvcrt)
 @ cdecl _loaddll(str) _loaddll
 @ cdecl _local_unwind2(ptr long) _local_unwind2
 @ cdecl _lock(long) _lock
-@ stub _locking #(long long long)
+@ cdecl _locking(long long long) _locking
 @ cdecl _logb( double ) _logb
 @ stub _longjmpex
 @ cdecl _lrotl(long long) _lrotl
diff --git a/include/Makefile.in b/include/Makefile.in
index 62ec68e98f2..4a117d60953 100644
--- a/include/Makefile.in
+++ b/include/Makefile.in
@@ -78,6 +78,7 @@ INSTALLED_INCLUDES = \
 	msvcrt/stdio.h \
 	msvcrt/stdlib.h \
 	msvcrt/string.h \
+	msvcrt/sys/locking.h \
 	msvcrt/sys/stat.h \
 	msvcrt/sys/timeb.h \
 	msvcrt/sys/types.h \
diff --git a/include/msvcrt/sys/locking.h b/include/msvcrt/sys/locking.h
new file mode 100644
index 00000000000..43c7ed498f2
--- /dev/null
+++ b/include/msvcrt/sys/locking.h
@@ -0,0 +1,30 @@
+/*
+ * _locking constants
+ *
+ * Copyright 2002 Bill Medland
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#ifndef __WINE_SYS_LOCKING_H__
+#define __WINE_SYS_LOCKING_H__
+#define __WINE_USE_MSVCRT
+
+#define _LK_UNLCK 0
+#define _LK_LOCK 1
+#define _LK_NBLCK 2
+#define _LK_RLCK 3
+#define _LK_NBRLCK 4
+
+#endif /* __WINE_SYS_LOCKING_H__ : Do not place anything after this #endif */
-- 
2.11.4.GIT