Daniel Lehman : ntdll: Fix prev_count from NtReleaseMutant.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 7950562e9e7faf26a13fc542845462094f4fa875
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=7950562e9e7faf26a13fc542845462094f4fa875

Author: Daniel Lehman <dlehman25 at gmail.com>
Date:   Tue May  3 02:55:43 2016 +0200

ntdll: Fix prev_count from NtReleaseMutant.

Signed-off-by: Daniel Lehman <dlehman25 at gmail.com>
Signed-off-by: Sebastian Lackner <sebastian at fds-team.de>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/ntdll/sync.c     | 2 +-
 dlls/ntdll/tests/om.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/dlls/ntdll/sync.c b/dlls/ntdll/sync.c
index 46cbca7..e949df6 100644
--- a/dlls/ntdll/sync.c
+++ b/dlls/ntdll/sync.c
@@ -510,7 +510,7 @@ NTSTATUS WINAPI NtReleaseMutant( IN HANDLE handle, OUT PLONG prev_count OPTIONAL
     {
         req->handle = wine_server_obj_handle( handle );
         status = wine_server_call( req );
-        if (prev_count) *prev_count = reply->prev_count;
+        if (prev_count) *prev_count = 1 - reply->prev_count;
     }
     SERVER_END_REQ;
     return status;
diff --git a/dlls/ntdll/tests/om.c b/dlls/ntdll/tests/om.c
index 2bc4ccd..64a16ab 100644
--- a/dlls/ntdll/tests/om.c
+++ b/dlls/ntdll/tests/om.c
@@ -1942,12 +1942,12 @@ static void test_mutant(void)
     prev = 0xdeadbeef;
     status = pNtReleaseMutant(mutant, &prev);
     ok( status == STATUS_SUCCESS, "NtQueryRelease failed %08x\n", status );
-    todo_wine ok( prev == -1, "NtQueryRelease failed, expected -1, got %d\n", prev );
+    ok( prev == -1, "NtQueryRelease failed, expected -1, got %d\n", prev );
 
     prev = 0xdeadbeef;
     status = pNtReleaseMutant(mutant, &prev);
     ok( status == STATUS_SUCCESS, "NtQueryRelease failed %08x\n", status );
-    todo_wine ok( prev == 0, "NtQueryRelease failed, expected 0, got %d\n", prev );
+    ok( prev == 0, "NtQueryRelease failed, expected 0, got %d\n", prev );
 
     memset(&info, 0xcc, sizeof(info));
     status = pNtQueryMutant(mutant, MutantBasicInformation, &info, sizeof(info), NULL);