2007-07-19 17:01:04 +02:00
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/*
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* Activation contexts
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*
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* Copyright 2004 Jon Griffiths
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* Copyright 2007 Eric Pouech
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* Copyright 2007 Jacek Caban for CodeWeavers
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* Copyright 2007 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <stdarg.h>
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#include <stdio.h>
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#define NONAMELESSUNION
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#define NONAMELESSSTRUCT
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#include "ntstatus.h"
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#define WIN32_NO_STATUS
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#include "winternl.h"
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#include "ntdll_misc.h"
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#include "wine/debug.h"
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#include "wine/unicode.h"
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WINE_DEFAULT_DEBUG_CHANNEL(actctx);
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#define ACTCTX_FLAGS_ALL (\
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ACTCTX_FLAG_PROCESSOR_ARCHITECTURE_VALID |\
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ACTCTX_FLAG_LANGID_VALID |\
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ACTCTX_FLAG_ASSEMBLY_DIRECTORY_VALID |\
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ACTCTX_FLAG_RESOURCE_NAME_VALID |\
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ACTCTX_FLAG_SET_PROCESS_DEFAULT |\
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ACTCTX_FLAG_APPLICATION_NAME_VALID |\
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ACTCTX_FLAG_SOURCE_IS_ASSEMBLYREF |\
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ACTCTX_FLAG_HMODULE_VALID )
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#define ACTCTX_MAGIC 0xC07E3E11
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typedef struct _ACTIVATION_CONTEXT
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{
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ULONG magic;
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int ref_count;
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} ACTIVATION_CONTEXT;
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static ACTIVATION_CONTEXT *check_actctx( HANDLE h )
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{
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ACTIVATION_CONTEXT *actctx = h;
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if (!h || h == INVALID_HANDLE_VALUE) return NULL;
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switch (actctx->magic)
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{
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case ACTCTX_MAGIC:
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return actctx;
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default:
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return NULL;
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}
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}
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static inline void actctx_addref( ACTIVATION_CONTEXT *actctx )
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{
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interlocked_xchg_add( &actctx->ref_count, 1 );
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}
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static void actctx_release( ACTIVATION_CONTEXT *actctx )
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{
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if (interlocked_xchg_add( &actctx->ref_count, -1 ) == 1)
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{
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actctx->magic = 0;
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RtlFreeHeap( GetProcessHeap(), 0, actctx );
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}
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}
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/***********************************************************************
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* RtlCreateActivationContext (NTDLL.@)
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*
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* Create an activation context.
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*
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* FIXME: function signature/prototype is wrong
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*/
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NTSTATUS WINAPI RtlCreateActivationContext( HANDLE *handle, const void *ptr )
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{
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const ACTCTXW *pActCtx = ptr; /* FIXME: not the right structure */
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ACTIVATION_CONTEXT *actctx;
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TRACE("%p %08x\n", pActCtx, pActCtx ? pActCtx->dwFlags : 0);
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if (!pActCtx || pActCtx->cbSize != sizeof(*pActCtx) ||
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(pActCtx->dwFlags & ~ACTCTX_FLAGS_ALL))
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return STATUS_INVALID_PARAMETER;
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if (!(actctx = RtlAllocateHeap( GetProcessHeap(), 0, sizeof(*actctx) )))
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return STATUS_NO_MEMORY;
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actctx->magic = ACTCTX_MAGIC;
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actctx->ref_count = 1;
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*handle = actctx;
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return STATUS_SUCCESS;
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}
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/***********************************************************************
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* RtlAddRefActivationContext (NTDLL.@)
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*/
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void WINAPI RtlAddRefActivationContext( HANDLE handle )
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{
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ACTIVATION_CONTEXT *actctx;
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if ((actctx = check_actctx( handle ))) actctx_addref( actctx );
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}
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/******************************************************************
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* RtlReleaseActivationContext (NTDLL.@)
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*/
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void WINAPI RtlReleaseActivationContext( HANDLE handle )
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{
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ACTIVATION_CONTEXT *actctx;
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if ((actctx = check_actctx( handle ))) actctx_release( actctx );
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}
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2007-07-19 17:07:48 +02:00
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/******************************************************************
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* RtlActivateActivationContext (NTDLL.@)
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*/
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NTSTATUS WINAPI RtlActivateActivationContext( ULONG unknown, HANDLE handle, ULONG_PTR *cookie )
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{
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RTL_ACTIVATION_CONTEXT_STACK_FRAME *frame;
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TRACE( "%p %p\n", handle, cookie );
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if (!(frame = RtlAllocateHeap( GetProcessHeap(), 0, sizeof(*frame) )))
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return STATUS_NO_MEMORY;
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frame->Previous = NtCurrentTeb()->ActivationContextStack.ActiveFrame;
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frame->ActivationContext = handle;
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frame->Flags = 0;
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NtCurrentTeb()->ActivationContextStack.ActiveFrame = frame;
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RtlAddRefActivationContext( handle );
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*cookie = (ULONG_PTR)frame;
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return STATUS_SUCCESS;
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}
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/***********************************************************************
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* RtlDeactivateActivationContext (NTDLL.@)
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*/
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void WINAPI RtlDeactivateActivationContext( ULONG flags, ULONG_PTR cookie )
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{
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RTL_ACTIVATION_CONTEXT_STACK_FRAME *frame, *top;
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TRACE( "%x %lx\n", flags, cookie );
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/* find the right frame */
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top = NtCurrentTeb()->ActivationContextStack.ActiveFrame;
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for (frame = top; frame; frame = frame->Previous)
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if ((ULONG_PTR)frame == cookie) break;
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if (!frame)
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RtlRaiseStatus( STATUS_SXS_INVALID_DEACTIVATION );
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if (frame != top && !(flags & DEACTIVATE_ACTCTX_FLAG_FORCE_EARLY_DEACTIVATION))
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RtlRaiseStatus( STATUS_SXS_EARLY_DEACTIVATION );
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/* pop everything up to and including frame */
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NtCurrentTeb()->ActivationContextStack.ActiveFrame = frame->Previous;
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while (top != NtCurrentTeb()->ActivationContextStack.ActiveFrame)
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{
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frame = top->Previous;
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RtlReleaseActivationContext( top->ActivationContext );
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RtlFreeHeap( GetProcessHeap(), 0, top );
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top = frame;
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}
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}
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/******************************************************************
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* RtlFreeThreadActivationContextStack (NTDLL.@)
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*/
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void WINAPI RtlFreeThreadActivationContextStack(void)
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{
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RTL_ACTIVATION_CONTEXT_STACK_FRAME *frame;
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frame = NtCurrentTeb()->ActivationContextStack.ActiveFrame;
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while (frame)
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{
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RTL_ACTIVATION_CONTEXT_STACK_FRAME *prev = frame->Previous;
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RtlReleaseActivationContext( frame->ActivationContext );
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RtlFreeHeap( GetProcessHeap(), 0, frame );
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frame = prev;
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}
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NtCurrentTeb()->ActivationContextStack.ActiveFrame = NULL;
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}
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/******************************************************************
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* RtlGetActiveActivationContext (NTDLL.@)
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*/
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NTSTATUS WINAPI RtlGetActiveActivationContext( HANDLE *handle )
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{
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if (NtCurrentTeb()->ActivationContextStack.ActiveFrame)
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{
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*handle = NtCurrentTeb()->ActivationContextStack.ActiveFrame->ActivationContext;
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RtlAddRefActivationContext( *handle );
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}
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else
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*handle = 0;
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return STATUS_SUCCESS;
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}
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/******************************************************************
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* RtlIsActivationContextActive (NTDLL.@)
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*/
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BOOLEAN WINAPI RtlIsActivationContextActive( HANDLE handle )
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{
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RTL_ACTIVATION_CONTEXT_STACK_FRAME *frame;
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for (frame = NtCurrentTeb()->ActivationContextStack.ActiveFrame; frame; frame = frame->Previous)
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if (frame->ActivationContext == handle) return TRUE;
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return FALSE;
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}
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