[PATCH] ntdll: Implement ProcessPriorityClass in NtQueryInformationProcess.

[Zebediah Figura]

From: Michael Müller <michael(a)fds-team.de>

Allows Process Hacker to show process priority.

Signed-off-by: Zebediah Figura <z.figura12(a)gmail.com>
---
 dlls/ntdll/process.c    | 29 ++++++++++++++++++++++++++++-
 dlls/ntdll/tests/info.c | 38 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 66 insertions(+), 1 deletion(-)

diff --git a/dlls/ntdll/process.c b/dlls/ntdll/process.c
index 40034b4..835d7e6 100644
--- a/dlls/ntdll/process.c
+++ b/dlls/ntdll/process.c
@@ -205,7 +205,6 @@ NTSTATUS WINAPI NtQueryInformationProcess(
     UNIMPLEMENTED_INFO_CLASS(ProcessWorkingSetWatch);
     UNIMPLEMENTED_INFO_CLASS(ProcessUserModeIOPL);
     UNIMPLEMENTED_INFO_CLASS(ProcessEnableAlignmentFaultFixup);
-    UNIMPLEMENTED_INFO_CLASS(ProcessPriorityClass);
     UNIMPLEMENTED_INFO_CLASS(ProcessWx86Information);
     UNIMPLEMENTED_INFO_CLASS(ProcessPriorityBoost);
     UNIMPLEMENTED_INFO_CLASS(ProcessDeviceMap);
@@ -545,6 +544,34 @@ NTSTATUS WINAPI NtQueryInformationProcess(
         else
             ret = STATUS_INFO_LENGTH_MISMATCH;
         break;
+    case ProcessPriorityClass:
+        len = sizeof(PROCESS_PRIORITY_CLASS);
+        if (ProcessInformationLength == len)
+        {
+            if (!ProcessInformation)
+                ret = STATUS_ACCESS_VIOLATION;
+            else if (!ProcessHandle)
+                ret = STATUS_INVALID_HANDLE;
+            else
+            {
+                PROCESS_PRIORITY_CLASS *priority = ProcessInformation;
+
+                SERVER_START_REQ(get_process_info)
+                {
+                    req->handle = wine_server_obj_handle( ProcessHandle );
+                    if ((ret = wine_server_call( req )) == STATUS_SUCCESS)
+                    {
+                        priority->PriorityClass = reply->priority;
+                        /* FIXME: Not yet supported by the wineserver */
+                        priority->Foreground = FALSE;
+                    }
+                }
+                SERVER_END_REQ;
+            }
+        }
+        else
+            ret = STATUS_INFO_LENGTH_MISMATCH;
+        break;
     default:
         FIXME("(%p,info_class=%d,%p,0x%08x,%p) Unknown information class\n",
               ProcessHandle,ProcessInformationClass,
diff --git a/dlls/ntdll/tests/info.c b/dlls/ntdll/tests/info.c
index 1f1c675..54321e5 100644
--- a/dlls/ntdll/tests/info.c
+++ b/dlls/ntdll/tests/info.c
@@ -1334,6 +1334,40 @@ static void test_query_process_debug_port(int argc, char **argv)
     ok(ret, "CloseHandle failed, last error %#x.\n", GetLastError());
 }
 
+static void test_query_process_priority(void)
+{
+    PROCESS_PRIORITY_CLASS priority[2];
+    ULONG ReturnLength;
+    DWORD orig_priority;
+    NTSTATUS status;
+    BOOL ret;
+
+    status = pNtQueryInformationProcess(NULL, ProcessPriorityClass, NULL, sizeof(priority[0]), NULL);
+    ok(status == STATUS_ACCESS_VIOLATION || broken(status == STATUS_INVALID_HANDLE) /* w2k3 */,
+       "Expected STATUS_ACCESS_VIOLATION, got %08x\n", status);
+
+    status = pNtQueryInformationProcess(NULL, ProcessPriorityClass, &priority, sizeof(priority[0]), NULL);
+    ok(status == STATUS_INVALID_HANDLE, "Expected STATUS_INVALID_HANDLE, got %08x\n", status);
+
+    status = pNtQueryInformationProcess(GetCurrentProcess(), ProcessPriorityClass, &priority, 1, &ReturnLength);
+    ok(status == STATUS_INFO_LENGTH_MISMATCH, "Expected STATUS_INFO_LENGTH_MISMATCH, got %08x\n", status);
+
+    status = pNtQueryInformationProcess(GetCurrentProcess(), ProcessPriorityClass, &priority, sizeof(priority), &ReturnLength);
+    ok(status == STATUS_INFO_LENGTH_MISMATCH, "Expected STATUS_INFO_LENGTH_MISMATCH, got %08x\n", status);
+
+    orig_priority = GetPriorityClass(GetCurrentProcess());
+    ret = SetPriorityClass(GetCurrentProcess(), BELOW_NORMAL_PRIORITY_CLASS);
+    ok(ret, "Failed to set priority class: %u\n", GetLastError());
+
+    status = pNtQueryInformationProcess(GetCurrentProcess(), ProcessPriorityClass, &priority, sizeof(priority[0]), &ReturnLength);
+    ok(status == STATUS_SUCCESS, "Expected STATUS_SUCCESS, got %08x\n", status);
+    ok(priority[0].PriorityClass == PROCESS_PRIOCLASS_BELOW_NORMAL,
+       "Expected PROCESS_PRIOCLASS_BELOW_NORMAL, got %u\n", priority[0].PriorityClass);
+
+    ret = SetPriorityClass(GetCurrentProcess(), orig_priority);
+    ok(ret, "Failed to reset priority class: %u\n", GetLastError());
+}
+
 static void test_query_process_handlecount(void)
 {
     NTSTATUS status;
@@ -2192,6 +2226,10 @@ START_TEST(info)
     trace("Starting test_process_debug_port()\n");
     test_query_process_debug_port(argc, argv);
 
+    /* 0x12 ProcessPriorityClass */
+    trace("Starting test_query_process_priority()\n");
+    test_query_process_priority();
+
     /* 0x14 ProcessHandleCount */
     trace("Starting test_query_process_handlecount()\n");
     test_query_process_handlecount();
-- 
2.7.4