+++ /dev/null
-/* $Id$
- *
- * reactos/subsys/csrss/api/handle.c
- *
- * CSRSS handle functions
- *
- * ReactOS Operating System
- */
-
-/* INCLUDES ******************************************************************/
-
-#include <csrss.h>
-
-#define NDEBUG
-#include <debug.h>
-
-/* FUNCTIONS *****************************************************************/
-
-static unsigned ObjectDefinitionsCount = 0;
-static PCSRSS_OBJECT_DEFINITION ObjectDefinitions = NULL;
-
-BOOL
-CsrIsConsoleHandle(HANDLE Handle)
-{
- return ((((ULONG)Handle) & 0x10000003) == 0x3) ? TRUE : FALSE;
-}
-
-
-NTSTATUS FASTCALL
-CsrRegisterObjectDefinitions(PCSRSS_OBJECT_DEFINITION NewDefinitions)
-{
- unsigned NewCount;
- PCSRSS_OBJECT_DEFINITION Scan;
- PCSRSS_OBJECT_DEFINITION New;
-
- NewCount = 0;
- for (Scan = NewDefinitions; 0 != Scan->Type; Scan++)
- {
- NewCount++;
- }
-
- New = RtlAllocateHeap(CsrssApiHeap, 0,
- (ObjectDefinitionsCount + NewCount)
- * sizeof(CSRSS_OBJECT_DEFINITION));
- if (NULL == New)
- {
- DPRINT1("Unable to allocate memory\n");
- return STATUS_NO_MEMORY;
- }
- if (0 != ObjectDefinitionsCount)
- {
- RtlCopyMemory(New, ObjectDefinitions,
- ObjectDefinitionsCount * sizeof(CSRSS_OBJECT_DEFINITION));
- RtlFreeHeap(CsrssApiHeap, 0, ObjectDefinitions);
- }
- RtlCopyMemory(New + ObjectDefinitionsCount, NewDefinitions,
- NewCount * sizeof(CSRSS_OBJECT_DEFINITION));
- ObjectDefinitions = New;
- ObjectDefinitionsCount += NewCount;
-
- return STATUS_SUCCESS;
-}
-
-NTSTATUS STDCALL CsrGetObject( PCSRSS_PROCESS_DATA ProcessData, HANDLE Handle, Object_t **Object )
-{
- ULONG h = (((ULONG)Handle) >> 2) - 1;
- DPRINT("CsrGetObject, Object: %x, %x, %x\n", Object, Handle, ProcessData ? ProcessData->HandleTableSize : 0);
-
- if (ProcessData == NULL)
- {
- return STATUS_INVALID_PARAMETER;
- }
- if (!CsrIsConsoleHandle(Handle) || ProcessData->HandleTableSize <= h)
- {
- DPRINT1("CsrGetObject returning invalid handle (%x)\n", Handle);
- return STATUS_INVALID_HANDLE;
- }
- *Object = ProcessData->HandleTable[h];
- // DbgPrint( "CsrGetObject returning\n" );
- return *Object ? STATUS_SUCCESS : STATUS_INVALID_HANDLE;
-}
-
-
-NTSTATUS STDCALL
-CsrReleaseObjectByPointer(Object_t *Object)
-{
- BOOL Found;
- unsigned DefIndex;
-
- /* dec ref count */
- if (InterlockedDecrement(&Object->ReferenceCount) == 0)
- {
- Found = FALSE;
- for (DefIndex = 0; ! Found && DefIndex < ObjectDefinitionsCount; DefIndex++)
- {
- if (Object->Type == ObjectDefinitions[DefIndex].Type)
- {
- (ObjectDefinitions[DefIndex].CsrCleanupObjectProc)(Object);
- Found = TRUE;
- }
- }
-
- if (! Found)
- {
- DPRINT1("CSR: Error: releaseing unknown object type 0x%x", Object->Type);
- }
- }
-
- return STATUS_SUCCESS;
-}
-
-
-NTSTATUS STDCALL
-CsrReleaseObject(PCSRSS_PROCESS_DATA ProcessData,
- HANDLE Handle)
-{
- ULONG h = (((ULONG)Handle) >> 2) - 1;
- NTSTATUS Status;
-
- if (ProcessData == NULL)
- {
- return STATUS_INVALID_PARAMETER;
- }
- if (!CsrIsConsoleHandle(Handle) || h >= ProcessData->HandleTableSize || ProcessData->HandleTable[h] == NULL)
- {
- return STATUS_INVALID_HANDLE;
- }
-
- Status = CsrReleaseObjectByPointer(ProcessData->HandleTable[h]);
-
- RtlEnterCriticalSection(&ProcessData->HandleTableLock);
- ProcessData->HandleTable[h] = 0;
- RtlLeaveCriticalSection(&ProcessData->HandleTableLock);
- return Status;
-}
-
-NTSTATUS STDCALL CsrInsertObject( PCSRSS_PROCESS_DATA ProcessData, PHANDLE Handle, Object_t *Object )
-{
- ULONG i;
- PVOID* Block;
-
- if (ProcessData == NULL)
- {
- return STATUS_INVALID_PARAMETER;
- }
-
- RtlEnterCriticalSection(&ProcessData->HandleTableLock);
-
- for (i = 0; i < ProcessData->HandleTableSize; i++)
- {
- if (ProcessData->HandleTable[i] == NULL)
- {
- break;
- }
- }
- if (i >= ProcessData->HandleTableSize)
- {
- Block = RtlAllocateHeap(CsrssApiHeap,
- HEAP_ZERO_MEMORY,
- (ProcessData->HandleTableSize + 64) * sizeof(HANDLE));
- if (Block == NULL)
- {
- RtlLeaveCriticalSection(&ProcessData->HandleTableLock);
- return(STATUS_UNSUCCESSFUL);
- }
- RtlCopyMemory(Block,
- ProcessData->HandleTable,
- ProcessData->HandleTableSize * sizeof(HANDLE));
- Block = InterlockedExchangePointer(&ProcessData->HandleTable, Block);
- RtlFreeHeap( CsrssApiHeap, 0, Block );
- ProcessData->HandleTableSize += 64;
- }
- ProcessData->HandleTable[i] = Object;
- *Handle = (HANDLE)(((i + 1) << 2) | 0x3);
- InterlockedIncrement( &Object->ReferenceCount );
- RtlLeaveCriticalSection(&ProcessData->HandleTableLock);
- return(STATUS_SUCCESS);
-}
-
-NTSTATUS STDCALL CsrDuplicateHandleTable(PCSRSS_PROCESS_DATA SourceProcessData,
- PCSRSS_PROCESS_DATA TargetProcessData)
-{
- ULONG i;
-
- if (SourceProcessData == NULL ||
- TargetProcessData == NULL ||
- TargetProcessData->HandleTableSize)
- {
- return STATUS_INVALID_PARAMETER;
- }
-
- RtlEnterCriticalSection(&SourceProcessData->HandleTableLock);
-
- /* we are called from CreateProcessData, it isn't necessary to lock the target process data */
-
- TargetProcessData->HandleTable = RtlAllocateHeap(CsrssApiHeap,
- HEAP_ZERO_MEMORY,
- SourceProcessData->HandleTableSize * sizeof(HANDLE));
- if (TargetProcessData->HandleTable == NULL)
- {
- RtlLeaveCriticalSection(&SourceProcessData->HandleTableLock);
- return(STATUS_UNSUCCESSFUL);
- }
- TargetProcessData->HandleTableSize = SourceProcessData->HandleTableSize;
- for (i = 0; i < SourceProcessData->HandleTableSize; i++)
- {
- if (SourceProcessData->HandleTable[i])
- {
- TargetProcessData->HandleTable[i] = SourceProcessData->HandleTable[i];
- InterlockedIncrement( &SourceProcessData->HandleTable[i]->ReferenceCount );
- }
- }
- RtlLeaveCriticalSection(&SourceProcessData->HandleTableLock);
- return(STATUS_SUCCESS);
-}
-
-NTSTATUS STDCALL CsrVerifyObject( PCSRSS_PROCESS_DATA ProcessData, HANDLE Handle )
-{
- ULONG h = (((ULONG)Handle) >> 2) - 1;
-
- if (ProcessData == NULL)
- {
- return STATUS_INVALID_PARAMETER;
- }
- if (!CsrIsConsoleHandle(Handle) || h >= ProcessData->HandleTableSize)
- {
- return STATUS_INVALID_HANDLE;
- }
-
- return ProcessData->HandleTable[h] ? STATUS_SUCCESS : STATUS_INVALID_HANDLE;
-}
-
-/* EOF */
projects / reactos.git / blobdiff