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Diffstat (limited to 'xorg-server/dix/privates.c')
-rw-r--r--xorg-server/dix/privates.c314
1 files changed, 314 insertions, 0 deletions
diff --git a/xorg-server/dix/privates.c b/xorg-server/dix/privates.c
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+++ b/xorg-server/dix/privates.c
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+/*
+
+Copyright 1993, 1998 The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall
+not be used in advertising or otherwise to promote the sale, use or
+other dealings in this Software without prior written authorization
+from The Open Group.
+
+*/
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <stddef.h>
+#include "windowstr.h"
+#include "resource.h"
+#include "privates.h"
+#include "gcstruct.h"
+#include "cursorstr.h"
+#include "colormapst.h"
+#include "inputstr.h"
+
+struct _Private {
+ DevPrivateKey key;
+ pointer value;
+ struct _Private *next;
+};
+
+typedef struct _PrivateDesc {
+ DevPrivateKey key;
+ unsigned size;
+ CallbackListPtr initfuncs;
+ CallbackListPtr deletefuncs;
+ struct _PrivateDesc *next;
+} PrivateDescRec;
+
+/* list of all allocated privates */
+static PrivateDescRec *items = NULL;
+
+static _X_INLINE PrivateDescRec *
+findItem(const DevPrivateKey key)
+{
+ PrivateDescRec *item = items;
+ while (item) {
+ if (item->key == key)
+ return item;
+ item = item->next;
+ }
+ return NULL;
+}
+
+/*
+ * Request pre-allocated space.
+ */
+_X_EXPORT int
+dixRequestPrivate(const DevPrivateKey key, unsigned size)
+{
+ PrivateDescRec *item = findItem(key);
+ if (item) {
+ if (size > item->size)
+ item->size = size;
+ } else {
+ item = (PrivateDescRec *)xalloc(sizeof(PrivateDescRec));
+ if (!item)
+ return FALSE;
+ memset(item, 0, sizeof(PrivateDescRec));
+
+ /* add privates descriptor */
+ item->key = key;
+ item->size = size;
+ item->next = items;
+ items = item;
+ }
+ return TRUE;
+}
+
+/*
+ * Allocate a private and attach it to an existing object.
+ */
+_X_EXPORT pointer *
+dixAllocatePrivate(PrivateRec **privates, const DevPrivateKey key)
+{
+ PrivateDescRec *item = findItem(key);
+ PrivateRec *ptr;
+ unsigned size = sizeof(PrivateRec);
+
+ if (item)
+ size += item->size;
+
+ ptr = (PrivateRec *)xcalloc(size, 1);
+ if (!ptr)
+ return NULL;
+ ptr->key = key;
+ ptr->value = (size > sizeof(PrivateRec)) ? (ptr + 1) : NULL;
+ ptr->next = *privates;
+ *privates = ptr;
+
+ /* call any init funcs and return */
+ if (item) {
+ PrivateCallbackRec calldata = { key, &ptr->value };
+ CallCallbacks(&item->initfuncs, &calldata);
+ }
+ return &ptr->value;
+}
+
+/*
+ * Look up a private pointer.
+ */
+_X_EXPORT pointer
+dixLookupPrivate(PrivateRec **privates, const DevPrivateKey key)
+{
+ PrivateRec *rec = *privates;
+ pointer *ptr;
+
+ while (rec) {
+ if (rec->key == key)
+ return rec->value;
+ rec = rec->next;
+ }
+
+ ptr = dixAllocatePrivate(privates, key);
+ return ptr ? *ptr : NULL;
+}
+
+/*
+ * Look up the address of a private pointer.
+ */
+_X_EXPORT pointer *
+dixLookupPrivateAddr(PrivateRec **privates, const DevPrivateKey key)
+{
+ PrivateRec *rec = *privates;
+
+ while (rec) {
+ if (rec->key == key)
+ return &rec->value;
+ rec = rec->next;
+ }
+
+ return dixAllocatePrivate(privates, key);
+}
+
+/*
+ * Set a private pointer.
+ */
+_X_EXPORT int
+dixSetPrivate(PrivateRec **privates, const DevPrivateKey key, pointer val)
+{
+ PrivateRec *rec;
+
+ top:
+ rec = *privates;
+ while (rec) {
+ if (rec->key == key) {
+ rec->value = val;
+ return TRUE;
+ }
+ rec = rec->next;
+ }
+
+ if (!dixAllocatePrivate(privates, key))
+ return FALSE;
+ goto top;
+}
+
+/*
+ * Called to free privates at object deletion time.
+ */
+_X_EXPORT void
+dixFreePrivates(PrivateRec *privates)
+{
+ PrivateRec *ptr, *next;
+ PrivateDescRec *item;
+ PrivateCallbackRec calldata;
+
+ /* first pass calls the delete callbacks */
+ for (ptr = privates; ptr; ptr = ptr->next) {
+ item = findItem(ptr->key);
+ if (item) {
+ calldata.key = ptr->key;
+ calldata.value = &ptr->value;
+ CallCallbacks(&item->deletefuncs, &calldata);
+ }
+ }
+
+ /* second pass frees the memory */
+ ptr = privates;
+ while (ptr) {
+ next = ptr->next;
+ xfree(ptr);
+ ptr = next;
+ }
+}
+
+/*
+ * Callback registration
+ */
+_X_EXPORT int
+dixRegisterPrivateInitFunc(const DevPrivateKey key,
+ CallbackProcPtr callback, pointer data)
+{
+ PrivateDescRec *item = findItem(key);
+ if (!item) {
+ if (!dixRequestPrivate(key, 0))
+ return FALSE;
+ item = findItem(key);
+ }
+ return AddCallback(&item->initfuncs, callback, data);
+}
+
+_X_EXPORT int
+dixRegisterPrivateDeleteFunc(const DevPrivateKey key,
+ CallbackProcPtr callback, pointer data)
+{
+ PrivateDescRec *item = findItem(key);
+ if (!item) {
+ if (!dixRequestPrivate(key, 0))
+ return FALSE;
+ item = findItem(key);
+ }
+ return AddCallback(&item->deletefuncs, callback, data);
+}
+
+/* Table of devPrivates offsets */
+static const int offsetDefaults[] = {
+ -1, /* RT_NONE */
+ offsetof(WindowRec, devPrivates), /* RT_WINDOW */
+ offsetof(PixmapRec, devPrivates), /* RT_PIXMAP */
+ offsetof(GC, devPrivates), /* RT_GC */
+ -1, /* RT_FONT */
+ offsetof(CursorRec, devPrivates), /* RT_CURSOR */
+ offsetof(ColormapRec, devPrivates), /* RT_COLORMAP */
+ -1, /* RT_CMAPENTRY */
+ -1, /* RT_OTHERCLIENT */
+ -1 /* RT_PASSIVEGRAB */
+};
+
+static int *offsets = NULL;
+static int offsetsSize = 0;
+
+/*
+ * Specify where the devPrivates field is located in a structure type
+ */
+_X_EXPORT int
+dixRegisterPrivateOffset(RESTYPE type, int offset)
+{
+ type = type & TypeMask;
+
+ /* resize offsets table if necessary */
+ while (type >= offsetsSize) {
+ unsigned i = offsetsSize * 2 * sizeof(int);
+ offsets = (int *)xrealloc(offsets, i);
+ if (!offsets) {
+ offsetsSize = 0;
+ return FALSE;
+ }
+ for (i=offsetsSize; i < 2*offsetsSize; i++)
+ offsets[i] = -1;
+ offsetsSize *= 2;
+ }
+
+ offsets[type] = offset;
+ return TRUE;
+}
+
+_X_EXPORT int
+dixLookupPrivateOffset(RESTYPE type)
+{
+ type = type & TypeMask;
+ assert(type < offsetsSize);
+ return offsets[type];
+}
+
+int
+dixResetPrivates(void)
+{
+ PrivateDescRec *next;
+
+ /* reset internal structures */
+ while (items) {
+ next = items->next;
+ DeleteCallbackList(&items->initfuncs);
+ DeleteCallbackList(&items->deletefuncs);
+ xfree(items);
+ items = next;
+ }
+ if (offsets)
+ xfree(offsets);
+ offsetsSize = sizeof(offsetDefaults);
+ offsets = (int *)xalloc(offsetsSize);
+ offsetsSize /= sizeof(int);
+ if (!offsets)
+ return FALSE;
+ memcpy(offsets, offsetDefaults, sizeof(offsetDefaults));
+ return TRUE;
+}