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authormarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
committermarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
commit3562e78743202e43aec8727005182a2558117eca (patch)
tree8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /xorg-server/include/privates.h
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Checked in the following released items:
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Diffstat (limited to 'xorg-server/include/privates.h')
-rw-r--r--xorg-server/include/privates.h112
1 files changed, 112 insertions, 0 deletions
diff --git a/xorg-server/include/privates.h b/xorg-server/include/privates.h
new file mode 100644
index 000000000..98d893c77
--- /dev/null
+++ b/xorg-server/include/privates.h
@@ -0,0 +1,112 @@
+/***********************************************************
+
+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
+AUTHOR 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.
+
+******************************************************************/
+
+#ifndef PRIVATES_H
+#define PRIVATES_H 1
+
+#include "dix.h"
+#include "resource.h"
+
+/*****************************************************************
+ * STUFF FOR PRIVATES
+ *****************************************************************/
+
+typedef void *DevPrivateKey;
+struct _Private;
+typedef struct _Private PrivateRec;
+
+/*
+ * Request pre-allocated private space for your driver/module.
+ * Calling this is not necessary if only a pointer by itself is needed.
+ */
+extern int
+dixRequestPrivate(const DevPrivateKey key, unsigned size);
+
+/*
+ * Allocates a new private and attaches it to an existing object.
+ */
+extern pointer *
+dixAllocatePrivate(PrivateRec **privates, const DevPrivateKey key);
+
+/*
+ * Look up a private pointer.
+ */
+pointer
+dixLookupPrivate(PrivateRec **privates, const DevPrivateKey key);
+
+/*
+ * Look up the address of a private pointer.
+ */
+pointer *
+dixLookupPrivateAddr(PrivateRec **privates, const DevPrivateKey key);
+
+/*
+ * Set a private pointer.
+ */
+int
+dixSetPrivate(PrivateRec **privates, const DevPrivateKey key, pointer val);
+
+/*
+ * Register callbacks to be called on private allocation/freeing.
+ * The calldata argument to the callbacks is a PrivateCallbackPtr.
+ */
+typedef struct _PrivateCallback {
+ DevPrivateKey key; /* private registration key */
+ pointer *value; /* address of private pointer */
+} PrivateCallbackRec;
+
+extern int
+dixRegisterPrivateInitFunc(const DevPrivateKey key,
+ CallbackProcPtr callback, pointer userdata);
+
+extern int
+dixRegisterPrivateDeleteFunc(const DevPrivateKey key,
+ CallbackProcPtr callback, pointer userdata);
+
+/*
+ * Frees private data.
+ */
+extern void
+dixFreePrivates(PrivateRec *privates);
+
+/*
+ * Resets the subsystem, called from the main loop.
+ */
+extern int
+dixResetPrivates(void);
+
+/*
+ * These next two functions are necessary because the position of
+ * the devPrivates field varies by structure and calling code might
+ * only know the resource type, not the structure definition.
+ */
+
+/*
+ * Looks up the offset where the devPrivates field is located.
+ * Returns -1 if no offset has been registered for the resource type.
+ */
+extern int
+dixLookupPrivateOffset(RESTYPE type);
+
+/*
+ * Specifies the offset where the devPrivates field is located.
+ * A negative value indicates no devPrivates field is available.
+ */
+extern int
+dixRegisterPrivateOffset(RESTYPE type, int offset);
+
+/*
+ * Convenience macro for adding an offset to an object pointer
+ * when making a call to one of the devPrivates functions
+ */
+#define DEVPRIV_AT(ptr, offset) ((PrivateRec **)((char *)ptr + offset))
+
+#endif /* PRIVATES_H */