Implemented GlobalMemoryStatusEx().

dlls/kernel/kernel32.spec

@@ -533,7 +533,7 @@
 @ stdcall GlobalHandle(ptr) GlobalHandle
 @ stdcall GlobalLock(long) GlobalLock
 @ stdcall GlobalMemoryStatus(ptr) GlobalMemoryStatus
-@ stub GlobalMemoryStatusEx
+@ stdcall GlobalMemoryStatusEx(ptr) GlobalMemoryStatusEx
 @ stdcall GlobalReAlloc(long long long) GlobalReAlloc
 @ stdcall GlobalSize(long) GlobalSize
 @ stdcall GlobalUnWire(long) GlobalUnWire

include/winbase.h

@@ -460,6 +460,18 @@ typedef struct tagMEMORYSTATUS
     SIZE_T   dwAvailVirtual;
 } MEMORYSTATUS, *LPMEMORYSTATUS;
 
+typedef struct tagMEMORYSTATUSEX {
+  DWORD dwLength;
+  DWORD dwMemoryLoad;
+  DWORDLONG ullTotalPhys;
+  DWORDLONG ullAvailPhys;
+  DWORDLONG ullTotalPageFile;
+  DWORDLONG ullAvailPageFile;
+  DWORDLONG ullTotalVirtual;
+  DWORDLONG ullAvailVirtual;
+  DWORDLONG ullAvailExtendedVirtual;
+} MEMORYSTATUSEX, *LPMEMORYSTATUSEX;
+
 
 typedef struct _SYSTEMTIME{
         WORD wYear;

memory/global.c

@@ -1558,6 +1558,9 @@ SIZE_T WINAPI GlobalCompact( DWORD minfree )
 
 /***********************************************************************
  *           GlobalMemoryStatus   (KERNEL32.@)
+ * Provides information about the status of the memory, so apps can tell
+ * roughly how much they are able to allocate
+ * 
  * RETURNS
  *	None
  */
@@ -1692,6 +1695,38 @@ VOID WINAPI GlobalMemoryStatus(
           lpmem->dwAvailVirtual);
 }
 
+/***********************************************************************
+ *           GlobalMemoryStatusEx   (KERNEL32.@)
+ * A version of GlobalMemoryStatus that can deal with memory over 4GB
+ *
+ * RETURNS
+ *	None
+ */
+BOOL WINAPI GlobalMemoryStatusEx( LPMEMORYSTATUSEX lpBuffer ) {
+  MEMORYSTATUS memstatus;
+  
+  /* Because GlobalMemoryStatusEx is identical to GlobalMemoryStatus save
+     for one extra field in the struct, and the lack of a bug, we simply
+     call GlobalMemoryStatus and copy the values across. */
+  FIXME("we should emulate the 4GB bug here, as per MSDN\n");
+  GlobalMemoryStatus(&memstatus);
+  lpBuffer->dwMemoryLoad = memstatus.dwMemoryLoad;
+  lpBuffer->ullTotalPhys = memstatus.dwTotalPhys;
+  lpBuffer->ullAvailPhys = memstatus.dwAvailPhys;
+  lpBuffer->ullTotalPageFile = memstatus.dwTotalPageFile;
+  lpBuffer->ullAvailPageFile = memstatus.dwAvailPageFile;
+  lpBuffer->ullTotalVirtual = memstatus.dwTotalVirtual;
+  lpBuffer->ullAvailVirtual = memstatus.dwAvailVirtual;
+  /* MSDN says about AvailExtendedVirtual: Size of unreserved and uncommitted
+     memory in the extended portion of the virtual address space of the calling
+     process, in bytes.
+     
+     However, I don't know what this means, so set it to zero :(
+  */
+  lpBuffer->ullAvailExtendedVirtual = 0;
+  return 1;
+}
+
 /***********************************************************************
  *           A20Proc   (KERNEL.165)
  *           A20_Proc  (SYSTEM.20)