From 1e903d96cbdc78dbc91843cb599f6c31da627ff3 Mon Sep 17 00:00:00 2001
From: Giannis Adamopoulos <gadamopoulos@reactos.org>
Date: Thu, 18 Jan 2018 16:53:59 +0200
Subject: [PATCH] [RTL] actctx: Implement the implicit activation context

---
 media/CMakeLists.txt            |  2 ++
 media/systemcompatible.manifest |  8 ++++++++
 sdk/lib/rtl/actctx.c            | 26 ++++++++++++++++++++++++++
 3 files changed, 36 insertions(+)
 create mode 100644 media/systemcompatible.manifest

diff --git a/media/CMakeLists.txt b/media/CMakeLists.txt
index 778555daa55..508ab792140 100644
--- a/media/CMakeLists.txt
+++ b/media/CMakeLists.txt
@@ -12,3 +12,5 @@ add_cd_file(FILE ${CMAKE_CURRENT_SOURCE_DIR}/drivers/etc/networks DESTINATION re
 add_cd_file(FILE ${CMAKE_CURRENT_SOURCE_DIR}/drivers/etc/protocol DESTINATION reactos/system32/drivers/etc FOR all)
 add_cd_file(FILE ${CMAKE_CURRENT_SOURCE_DIR}/drivers/etc/services DESTINATION reactos/system32/drivers/etc FOR all)
 add_cd_file(FILE ${CMAKE_CURRENT_SOURCE_DIR}/sounds/ReactOS_LogOn.wav DESTINATION reactos/media FOR all)
+
+add_cd_file(FILE ${CMAKE_CURRENT_SOURCE_DIR}/systemcompatible.manifest DESTINATION reactos/winsxs/manifests FOR all)
\ No newline at end of file
diff --git a/media/systemcompatible.manifest b/media/systemcompatible.manifest
new file mode 100644
index 00000000000..e81ccfeeb2c
--- /dev/null
+++ b/media/systemcompatible.manifest
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+<dependency>
+    <dependentAssembly>
+        <assemblyIdentity type="win32" name="Microsoft.Windows.Common-Controls" version="5.82.0.0" publicKeyToken="6595b64144ccf1df" processorArchitecture="*" language="*" />
+    </dependentAssembly>
+</dependency>
+</assembly>
diff --git a/sdk/lib/rtl/actctx.c b/sdk/lib/rtl/actctx.c
index 6ce17340172..396b442fcdd 100644
--- a/sdk/lib/rtl/actctx.c
+++ b/sdk/lib/rtl/actctx.c
@@ -15,6 +15,7 @@
 /* Based on Wine Staging 1.7.37 */
 
 #include <rtl.h>
+#include <ntstrsafe.h>
 
 #define NDEBUG
 #include <debug.h>
@@ -694,6 +695,7 @@ static const WCHAR wildcardW[] = {'*',0};
 
 static ACTIVATION_CONTEXT_WRAPPED system_actctx = { ACTCTX_MAGIC_MARKER, { 1 } };
 static ACTIVATION_CONTEXT *process_actctx = &system_actctx.ActivationContext;
+static ACTIVATION_CONTEXT *implicit_actctx = &system_actctx.ActivationContext;
 
 static WCHAR *strdupW(const WCHAR* str)
 {
@@ -4657,6 +4659,8 @@ void actctx_init(void)
 {
     ACTCTXW ctx;
     HANDLE handle;
+    WCHAR buffer[1024];
+    NTSTATUS Status;
 
     ctx.cbSize   = sizeof(ctx);
     ctx.lpSource = NULL;
@@ -4668,6 +4672,22 @@ void actctx_init(void)
     {
         process_actctx = check_actctx(handle);
     }
+
+    ctx.dwFlags  = 0;
+    ctx.hModule  = NULL;
+    ctx.lpResourceName = NULL;
+    ctx.lpSource = buffer;
+    RtlStringCchCopyW(buffer, 1024, SharedUserData->NtSystemRoot);
+    RtlStringCchCatW(buffer, 1024, L"\\winsxs\\manifests\\systemcompatible.manifest");
+    Status = RtlCreateActivationContext(0, (PVOID)&ctx, 0, NULL, NULL, &handle);
+    if (NT_SUCCESS(Status))
+    {
+        implicit_actctx = check_actctx(handle);
+    }
+    else
+    {
+        DPRINT1("Failed to create the implicit act ctx. Status: 0x%x!!!\n", Status);
+    }
 }
 
 /* FUNCTIONS ***************************************************************/
@@ -5350,6 +5370,9 @@ NTSTATUS NTAPI RtlFindActivationContextSectionString( ULONG flags, const GUID *g
     if (status != STATUS_SUCCESS)
         status = find_string( process_actctx, section_kind, section_name, flags, data );
 
+    if (status != STATUS_SUCCESS)
+        status = find_string( implicit_actctx, section_kind, section_name, flags, data );
+
     DPRINT("RtlFindActivationContextSectionString() returns status %x\n", status);
     return status;
 }
@@ -5390,6 +5413,9 @@ NTSTATUS WINAPI RtlFindActivationContextSectionGuid( ULONG flags, const GUID *ex
     if (status != STATUS_SUCCESS)
         status = find_guid( process_actctx, section_kind, guid, flags, data );
 
+    if (status != STATUS_SUCCESS)
+        status = find_guid( implicit_actctx, section_kind, guid, flags, data );
+
     return status;
 }