From: Bernard Ladenthin <bernard.ladenthin@gmail.com>
Subject: kernel32/time: Implement GetSystemTimes using NtQuerySystemInformation.
Message-Id: <53A8B3C2.2020309@gmail.com>
Date: Tue, 24 Jun 2014 01:09:54 +0200

---
 dlls/kernel32/time.c |   34 +++++++++++++++++++++++++++++-----
 1 file changed, 29 insertions(+), 5 deletions(-)

diff --git a/dlls/kernel32/time.c b/dlls/kernel32/time.c
index 21ac120..b27e87f 100644
--- a/dlls/kernel32/time.c
+++ b/dlls/kernel32/time.c
@@ -1081,18 +1081,42 @@ BOOL WINAPI FileTimeToDosDateTime( const FILETIME *ft, LPWORD fatdate,
  * Retrieves system timing information
  *
  * PARAMS
- *  lpIdleTime [O] Destination for idle time.
- *  lpKernelTime [O] Destination for kernel time.
- *  lpUserTime [O] Destination for user time.
+ *  lpIdleTime   [out] Destination for idle time.
+ *  lpKernelTime [out] Destination for kernel time.
+ *  lpUserTime   [out] Destination for user time.
  *
  * RETURNS
  *  TRUE if success, FALSE otherwise.
  */
 BOOL WINAPI GetSystemTimes(LPFILETIME lpIdleTime, LPFILETIME lpKernelTime, LPFILETIME lpUserTime)
 {
-    FIXME("(%p,%p,%p): Stub!\n", lpIdleTime, lpKernelTime, lpUserTime);
+    SYSTEM_BASIC_INFORMATION sbi;
+    SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION *sppi = NULL;
+    ULONG len;
+    long long idleTime = 0, kernelTime = 0, userTime = 0;
+    int i;
 
-    return FALSE;
+    NtQuerySystemInformation(SystemBasicInformation, &sbi, sizeof(SYSTEM_BASIC_INFORMATION), NULL);
+
+    len = sizeof(SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION) * sbi.NumberOfProcessors;
+    sppi = RtlAllocateHeap(GetProcessHeap(), HEAP_ZERO_MEMORY, len);
+
+    NtQuerySystemInformation(SystemProcessorPerformanceInformation, sppi, len, NULL);
+
+    for (i=0; i < sbi.NumberOfProcessors; ++i)
+    {
+        idleTime +=  sppi[i].IdleTime.QuadPart;
+        kernelTime +=  sppi[i].KernelTime.QuadPart;
+        userTime +=  sppi[i].UserTime.QuadPart;
+    }
+
+    RtlFreeHeap(GetProcessHeap(), 0, sppi);
+
+    if (lpIdleTime)   LL2FILETIME(idleTime, lpIdleTime);
+    if (lpKernelTime) LL2FILETIME(kernelTime, lpKernelTime);
+    if (lpUserTime)   LL2FILETIME(userTime, lpUserTime);
+
+    return TRUE;
 }
 
 /***********************************************************************