* Create a branch for USB experiments.

svn path=/branches/usb-experiments/; revision=72629
2025-08-06 05:33:25 +00:00 · 2016-09-09 15:11:19 +00:00 · 2016-09-09 15:11:19 +00:00 · 0ee830d7a4
commit 0ee830d7a4
parent 28d8ba0d3e
23049 changed files with 0 additions and 1313991 deletions
--- a/win32ss/gdi/gdi32/objects/clientobj.c
+++ b/win32ss/gdi/gdi32/objects/clientobj.c
@ -0,0 +1,192 @@
+/*
+ * COPYRIGHT:       See COPYING in the top level directory
+ * PROJECT:         ReactOS WIN32 subsystem
+ * PURPOSE:         Support functions for GDI client objects
+ * PROGRAMMER:      Timo Kreuzer (timo.kreuzer@reactos.org)
+ */
+
+#include <precomp.h>
+
+CRITICAL_SECTION gcsClientObjLinks;
+ULONG gcClientObj;
+
+typedef struct _CLIENTOBJLINK
+{
+    struct _CLIENTOBJLINK *pcolNext;
+    HGDIOBJ hobj;
+    PVOID pvObj;
+} CLIENTOBJLINK, *PCLIENTOBJLINK;
+
+PCLIENTOBJLINK gapcolHashTable[127];
+
+BOOL
+WINAPI
+GdiCreateClientObjLink(
+    _In_ HGDIOBJ hobj,
+    _In_ PVOID pvObject)
+{
+    PCLIENTOBJLINK pcol;
+    ULONG iHashIndex;
+
+    /* Allocate a link structure */
+    pcol = HeapAlloc(GetProcessHeap(), 0, sizeof(*pcol));
+    if (pcol == NULL)
+    {
+        return FALSE;
+    }
+
+    /* Setup the link structure */
+    pcol->hobj = hobj;
+    pcol->pvObj = pvObject;
+
+    /* Calculate the hash index */
+    iHashIndex = (ULONG_PTR)hobj % _countof(gapcolHashTable);
+
+    /* Enter the critical section */
+    EnterCriticalSection(&gcsClientObjLinks);
+
+    /* Insert the link structure */
+    pcol->pcolNext = gapcolHashTable[iHashIndex];
+    gapcolHashTable[iHashIndex] = pcol;
+    gcClientObj++;
+
+    /* Leave the critical section */
+    LeaveCriticalSection(&gcsClientObjLinks);
+
+    return TRUE;
+}
+
+PVOID
+WINAPI
+GdiGetClientObjLink(
+    _In_ HGDIOBJ hobj)
+{
+    ULONG iHashIndex;
+    PCLIENTOBJLINK pcol;
+    PVOID pvObject = NULL;
+
+    /* Calculate the hash index */
+    iHashIndex = (ULONG_PTR)hobj % _countof(gapcolHashTable);
+
+    /* Enter the critical section */
+    EnterCriticalSection(&gcsClientObjLinks);
+
+    /* Loop the link entries in this hash bucket */
+    pcol = gapcolHashTable[iHashIndex];
+    while (pcol != NULL)
+    {
+        /* Check if this is the object we want */
+        if (pcol->hobj == hobj)
+        {
+            /* Get the object pointer and bail out */
+            pvObject = pcol->pvObj;
+            break;
+        }
+
+        /* Go to the next entry */
+        pcol = pcol->pcolNext;
+    }
+
+    /* Leave the critical section */
+    LeaveCriticalSection(&gcsClientObjLinks);
+
+    return pvObject;
+}
+
+PVOID
+WINAPI
+GdiRemoveClientObjLink(
+    _In_ HGDIOBJ hobj)
+{
+    PCLIENTOBJLINK pcol, *ppcol;
+    ULONG iHashIndex;
+    PVOID pvObject = NULL;
+
+    /* Calculate the hash index */
+    iHashIndex = (ULONG_PTR)hobj % _countof(gapcolHashTable);
+
+    /* Enter the critical section */
+    EnterCriticalSection(&gcsClientObjLinks);
+
+    /* Loop the link entries in this hash bucket */
+    ppcol = &gapcolHashTable[iHashIndex];
+    while (*ppcol != NULL)
+    {
+        /* Get the current client object link */
+        pcol = *ppcol;
+
+        /* Check if this is the one we want */
+        if (pcol->hobj == hobj)
+        {
+            /* Update the link pointer, removing this link */
+            *ppcol = pcol->pcolNext;
+            gcClientObj--;
+
+            /* Get the object pointer */
+            pvObject = pcol->pvObj;
+
+            /* Free the link structure */
+            HeapFree(GetProcessHeap(), 0, pcol);
+
+            /* We're done */
+            break;
+        }
+
+        /* Go to the next link pointer */
+        ppcol = &(pcol->pcolNext);
+    }
+
+    /* Leave the critical section */
+    LeaveCriticalSection(&gcsClientObjLinks);
+
+    /* Return the object pointer, or NULL if we did not find it */
+    return pvObject;
+}
+
+HGDIOBJ
+WINAPI
+GdiCreateClientObj(
+    _In_ PVOID pvObject,
+    _In_ GDILOOBJTYPE eObjType)
+{
+    HGDIOBJ hobj;
+
+    /* Call win32k to create a client object handle */
+    hobj = NtGdiCreateClientObj(eObjType);
+    if (hobj == NULL)
+    {
+        return NULL;
+    }
+
+    /* Create the client object link */
+    if (!GdiCreateClientObjLink(hobj, pvObject))
+    {
+        NtGdiDeleteClientObj(hobj);
+        return NULL;
+    }
+
+    return hobj;
+}
+
+PVOID
+WINAPI
+GdiDeleteClientObj(
+    _In_ HGDIOBJ hobj)
+{
+    PVOID pvObject;
+
+    /* Remove the client object link */
+    pvObject = GdiRemoveClientObjLink(hobj);
+    if (pvObject == NULL)
+    {
+        return NULL;
+    }
+
+    /* Call win32k to delete the handle */
+    if (!NtGdiDeleteClientObj(hobj))
+    {
+        ASSERT(FALSE);
+    }
+
+    return pvObject;
+}