xserver git update 11/6/2010

1 files changed, 200 insertions, 68 deletions

diff --git a/xorg-server/include/privates.h b/xorg-server/include/privates.h
index cbb08887f..2774776ab 100644
--- a/xorg-server/include/privates.h
+++ b/xorg-server/include/privates.h
@@ -12,125 +12,257 @@ 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"

+#include <X11/Xdefs.h>

+#include <X11/Xosdefs.h>

+#include <X11/Xfuncproto.h>

+#include "misc.h"

 

 /*****************************************************************

  * STUFF FOR PRIVATES

  *****************************************************************/

 

-typedef int *DevPrivateKey;

-struct _Private;

-typedef struct _Private PrivateRec;

+typedef struct _Private PrivateRec, *PrivatePtr;

+

+typedef enum {

+    /* XSELinux uses the same private keys for numerous objects */

+    PRIVATE_XSELINUX,

+

+    /* Otherwise, you get a private in just the requested structure

+     */

+    /* These can have objects created before all of the keys are registered */

+    PRIVATE_SCREEN,

+    PRIVATE_EXTENSION,

+    PRIVATE_COLORMAP,

+

+    /* These cannot have any objects before all relevant keys are registered */

+    PRIVATE_DEVICE,

+    PRIVATE_CLIENT,

+    PRIVATE_PROPERTY,

+    PRIVATE_SELECTION,

+    PRIVATE_WINDOW,

+    PRIVATE_PIXMAP,

+    PRIVATE_GC,

+    PRIVATE_CURSOR,

+    PRIVATE_CURSOR_BITS,

+

+    /* extension privates */

+    PRIVATE_DBE_WINDOW,

+    PRIVATE_DAMAGE,

+    PRIVATE_GLYPH,

+    PRIVATE_GLYPHSET,

+    PRIVATE_PICTURE,

+

+    /* last private type */

+    PRIVATE_LAST,

+} DevPrivateType;

+

+typedef struct _DevPrivateKeyRec {

+    int			offset;

+    int			size;

+    Bool		initialized;

+    Bool		allocated;

+    DevPrivateType	type;

+    struct _DevPrivateKeyRec	*next;

+} DevPrivateKeyRec, *DevPrivateKey;

 

 /*

- * Request pre-allocated private space for your driver/module.  This function

- * increases the amount of space allocated automatically when dixLookupPrivate

- * is called on a PrivateRec that does not yet have a value associated with

- * 'key'.

- *

- * This function will only increase the reserved size: if a size was previously

- * requested, then dixRequestPrivate causes later calls to dixLookupPrivate to

- * allocate the maximum of the old size and 'size'.  Requested sizes are reset

- * to 0 by dixResetPrivates, which is called before each server generation.

- *

- * If dixRequestPrivate is not called with a nonzero size for 'key', then the

- * module responsible for 'key' must manage the associated pointer itself with

- * dixSetPrivate.

- *

- * dixRequestPrivate returns FALSE if it cannot store the requested size.

+ * Let drivers know how to initialize private keys

  */

-extern _X_EXPORT int

-dixRequestPrivate(const DevPrivateKey key, unsigned size);

+

+#define HAS_DEVPRIVATEKEYREC		1

+#define HAS_DIXREGISTERPRIVATEKEY	1

 

 /*

- * Allocates space for an association of 'key' with a value in 'privates'.

+ * Register a new private index for the private type.

  *

- * If a nonzero size was requested with dixRequestPrivate, then

- * dixAllocatePrivate also allocates the requested amount of memory and

- * associates the pointer to that memory with 'key' in 'privates'.  The

- * allocated memory is initialized to zero.  This memory can only be freed by

- * dixFreePrivates.

+ * This initializes the specified key and optionally requests pre-allocated

+ * private space for your driver/module. If you request no extra space, you

+ * may set and get a single pointer value using this private key. Otherwise,

+ * you can get the address of the extra space and store whatever data you like

+ * there.

  *

- * If dixRequestPrivate was never called with a nonzero size, then

- * dixAllocatePrivate associates NULL with 'key' in 'privates'.

+ * You may call dixRegisterPrivate more than once on the same key, but the

+ * size and type must match or the server will abort.

  *

- * dixAllocatePrivate returns a pointer to the value associated with 'key' in

- * 'privates', unless a memory allocation fails, in which case it returns NULL.

+ * dixRegisterPrivateIndex returns FALSE if it fails to allocate memory

+ * during its operation.

  */

-extern _X_EXPORT pointer *

-dixAllocatePrivate(PrivateRec **privates, const DevPrivateKey key);

+extern _X_EXPORT Bool

+dixRegisterPrivateKey(DevPrivateKey key, DevPrivateType type, unsigned size);

 

 /*

- * Look up a private pointer.

+ * Check whether a private key has been registered

+ */

+static inline Bool

+dixPrivateKeyRegistered(DevPrivateKey key)

+{

+    return key->initialized;

+}

+

+/*

+ * Allocate a new private key.

  *

- * If no value is currently associated with 'key' in 'privates', then

- * dixLookupPrivate calls dixAllocatePrivate and returns the resulting

- * associated value.

+ * This manages the storage of the key object itself, freeing it when the

+ * privates system is restarted at server reset time. All other keys

+ * are expected to be statically allocated as the privates must be

+ * reset after all objects have been freed

+ */

+extern _X_EXPORT DevPrivateKey

+dixCreatePrivateKey(DevPrivateType type, unsigned size);

+

+/*

+ * Get the address of the private storage.

  *

- * dixLookupPrivate returns NULL if a memory allocation fails.

+ * For keys with pre-defined storage, this gets the base of that storage

+ * Otherwise, it returns the place where the private pointer is stored.

  */

-extern _X_EXPORT pointer

-dixLookupPrivate(PrivateRec **privates, const DevPrivateKey key);

+static inline void *

+dixGetPrivateAddr(PrivatePtr *privates, const DevPrivateKey key)

+{

+    assert(key->initialized);

+    return (char *) (*privates) + key->offset;

+}

 

 /*

- * Look up the address of a private pointer.  If 'key' is not associated with a

- * value in 'privates', then dixLookupPrivateAddr calls dixAllocatePrivate and

- * returns a pointer to the resulting associated value.

+ * Fetch a private pointer stored in the object

  *

- * dixLookupPrivateAddr returns NULL if 'key' was not previously associated in

- * 'privates' and a memory allocation fails.

+ * Returns the pointer stored with dixSetPrivate.

+ * This must only be used with keys that have

+ * no pre-defined storage

  */

-extern _X_EXPORT pointer *

-dixLookupPrivateAddr(PrivateRec **privates, const DevPrivateKey key);

+static inline void *

+dixGetPrivate(PrivatePtr *privates, const DevPrivateKey key)

+{

+    assert (key->size == 0);

+    return *(void **) dixGetPrivateAddr(privates, key);

+}

 

 /*

  * Associate 'val' with 'key' in 'privates' so that later calls to

  * dixLookupPrivate(privates, key) will return 'val'.

+ */

+static inline void

+dixSetPrivate(PrivatePtr *privates, const DevPrivateKey key, pointer val)

+{

+    assert (key->size == 0);

+    *(pointer *) dixGetPrivateAddr(privates, key) = val;

+}

+

+#include "dix.h"

+#include "resource.h"

+

+/*

+ * Lookup a pointer to the private record.

  *

- * dixSetPrivate returns FALSE if a memory allocation fails.

+ * For privates with defined storage, return the address of the

+ * storage. For privates without defined storage, return the pointer

+ * contents

  */

-extern _X_EXPORT int

-dixSetPrivate(PrivateRec **privates, const DevPrivateKey key, pointer val);

+static inline pointer

+dixLookupPrivate(PrivatePtr *privates, const DevPrivateKey key)

+{

+    if (key->size)

+	return dixGetPrivateAddr(privates, key);

+    else

+	return dixGetPrivate(privates, key);

+}

+

+/*

+ * Look up the address of the pointer to the storage

+ *

+ * This returns the place where the private pointer is stored,

+ * which is only valid for privates without predefined storage.

+ */

+static inline pointer *

+dixLookupPrivateAddr(PrivatePtr *privates, const DevPrivateKey key)

+{

+    assert (key->size == 0);

+    return dixGetPrivateAddr(privates, key);

+}

 

 /*

- * Unassociates all keys from 'privates' and frees all private data automatically

- * allocated via dixRequestPrivate.

+ * Allocates private data separately from main object.

+ *

+ * For objects created during server initialization, this allows those

+ * privates to be re-allocated as new private keys are registered.

+ *

+ * This includes screens, the serverClient, default colormaps and

+ * extensions entries.

+ */

+extern _X_EXPORT Bool

+dixAllocatePrivates(PrivatePtr *privates, DevPrivateType type);

+

+/*

+ * Frees separately allocated private data

  */

 extern _X_EXPORT void

-dixFreePrivates(PrivateRec *privates);

+dixFreePrivates(PrivatePtr privates, DevPrivateType type);

 

 /*

- * Resets the privates subsystem.  dixResetPrivates is called from the main loop

- * before each server generation.  This function must only be called by main().

+ * Initialize privates by zeroing them

  */

-extern _X_EXPORT int

-dixResetPrivates(void);

+extern _X_EXPORT void

+_dixInitPrivates(PrivatePtr *privates, void *addr, DevPrivateType type);

+

+#define dixInitPrivates(o, v, type) _dixInitPrivates(&(o)->devPrivates, (v), type);

 

 /*

- * 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.

+ * Clean up privates

  */

+extern _X_EXPORT void

+_dixFiniPrivates(PrivatePtr privates, DevPrivateType type);

+

+#define dixFiniPrivates(o,t)	_dixFiniPrivates((o)->devPrivates,t)

 

 /*

- * Looks up the offset where the devPrivates field is located.

- * Returns -1 if no offset has been registered for the resource type.

+ * Allocates private data at object creation time. Required

+ * for almost all objects, except for the list described

+ * above for dixAllocatePrivates.

+ */

+extern _X_EXPORT void *

+_dixAllocateObjectWithPrivates(unsigned size, unsigned clear, unsigned offset, DevPrivateType type);

+

+#define dixAllocateObjectWithPrivates(t, type) (t *) _dixAllocateObjectWithPrivates(sizeof(t), sizeof(t), offsetof(t, devPrivates), type)

+

+extern _X_EXPORT void

+_dixFreeObjectWithPrivates(void *object, PrivatePtr privates, DevPrivateType type);

+

+#define dixFreeObjectWithPrivates(o,t) _dixFreeObjectWithPrivates(o, (o)->devPrivates, t)

+

+/*

+ * Return size of privates for the specified type

  */

 extern _X_EXPORT int

-dixLookupPrivateOffset(RESTYPE type);

+dixPrivatesSize(DevPrivateType type);

+

+/*

+ * Dump out private stats to ErrorF

+ */

+extern void

+dixPrivateUsage(void);

+

+/*

+ * Resets the privates subsystem.  dixResetPrivates is called from the main loop

+ * before each server generation.  This function must only be called by main().

+ */

+extern _X_EXPORT void

+dixResetPrivates(void);

 

 /*

- * Specifies the offset where the devPrivates field is located.

- * A negative value indicates no devPrivates field is available.

+ * Looks up the offset where the devPrivates field is located.

+ *

+ * Returns -1 if the specified resource has no dev privates.

+ * The position of the devPrivates field varies by structure

+ * and calling code might only know the resource type, not the

+ * structure definition.

  */

 extern _X_EXPORT int

-dixRegisterPrivateOffset(RESTYPE type, int offset);

+dixLookupPrivateOffset(RESTYPE type);

 

 /*

  * 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))

+#define DEVPRIV_AT(ptr, offset) ((PrivatePtr *)((char *)(ptr) + offset))

 

 #endif /* PRIVATES_H */