364 lines
11 KiB
C
364 lines
11 KiB
C
/***********************************************************
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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******************************************************************/
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#ifndef PRIVATES_H
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#define PRIVATES_H 1
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#include <X11/Xdefs.h>
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#include <X11/Xosdefs.h>
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#include <X11/Xfuncproto.h>
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#include <assert.h>
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#include "misc.h"
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/*****************************************************************
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* STUFF FOR PRIVATES
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*****************************************************************/
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typedef struct _Private PrivateRec, *PrivatePtr;
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typedef enum {
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/* XSELinux uses the same private keys for numerous objects */
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PRIVATE_XSELINUX,
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/* Otherwise, you get a private in just the requested structure
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*/
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/* These can have objects created before all of the keys are registered */
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PRIVATE_SCREEN,
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PRIVATE_EXTENSION,
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PRIVATE_COLORMAP,
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PRIVATE_DEVICE,
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/* These cannot have any objects before all relevant keys are registered */
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PRIVATE_CLIENT,
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PRIVATE_PROPERTY,
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PRIVATE_SELECTION,
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PRIVATE_WINDOW,
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PRIVATE_PIXMAP,
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PRIVATE_GC,
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PRIVATE_CURSOR,
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PRIVATE_CURSOR_BITS,
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/* extension privates */
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PRIVATE_GLYPH,
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PRIVATE_GLYPHSET,
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PRIVATE_PICTURE,
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PRIVATE_SYNC_FENCE,
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/* last private type */
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PRIVATE_LAST,
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} DevPrivateType;
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typedef struct _DevPrivateKeyRec {
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int offset;
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int size;
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Bool initialized;
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Bool allocated;
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DevPrivateType type;
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struct _DevPrivateKeyRec *next;
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} DevPrivateKeyRec, *DevPrivateKey;
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typedef struct _DevPrivateSetRec {
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DevPrivateKey key;
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unsigned offset;
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int created;
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int allocated;
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} DevPrivateSetRec, *DevPrivateSetPtr;
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typedef struct _DevScreenPrivateKeyRec {
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DevPrivateKeyRec screenKey;
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} DevScreenPrivateKeyRec, *DevScreenPrivateKey;
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/*
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* Let drivers know how to initialize private keys
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*/
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#define HAS_DEVPRIVATEKEYREC 1
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#define HAS_DIXREGISTERPRIVATEKEY 1
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/*
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* Register a new private index for the private type.
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*
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* This initializes the specified key and optionally requests pre-allocated
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* private space for your driver/module. If you request no extra space, you
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* may set and get a single pointer value using this private key. Otherwise,
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* you can get the address of the extra space and store whatever data you like
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* there.
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*
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* You may call dixRegisterPrivateKey more than once on the same key, but the
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* size and type must match or the server will abort.
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*
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* dixRegisterPrivateKey returns FALSE if it fails to allocate memory
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* during its operation.
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*/
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extern _X_EXPORT Bool
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dixRegisterPrivateKey(DevPrivateKey key, DevPrivateType type, unsigned size);
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/*
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* Check whether a private key has been registered
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*/
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static inline Bool
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dixPrivateKeyRegistered(DevPrivateKey key)
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{
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return key->initialized;
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}
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/*
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* Get the address of the private storage.
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*
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* For keys with pre-defined storage, this gets the base of that storage
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* Otherwise, it returns the place where the private pointer is stored.
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*/
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static inline void *
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dixGetPrivateAddr(PrivatePtr *privates, const DevPrivateKey key)
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{
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assert(key->initialized);
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return (char *) (*privates) + key->offset;
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}
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/*
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* Fetch a private pointer stored in the object
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*
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* Returns the pointer stored with dixSetPrivate.
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* This must only be used with keys that have
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* no pre-defined storage
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*/
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static inline void *
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dixGetPrivate(PrivatePtr *privates, const DevPrivateKey key)
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{
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assert(key->size == 0);
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return *(void **) dixGetPrivateAddr(privates, key);
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}
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/*
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* Associate 'val' with 'key' in 'privates' so that later calls to
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* dixLookupPrivate(privates, key) will return 'val'.
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*/
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static inline void
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dixSetPrivate(PrivatePtr *privates, const DevPrivateKey key, void *val)
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{
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assert(key->size == 0);
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*(void **) dixGetPrivateAddr(privates, key) = val;
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}
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#include "dix.h"
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#include "resource.h"
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/*
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* Lookup a pointer to the private record.
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*
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* For privates with defined storage, return the address of the
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* storage. For privates without defined storage, return the pointer
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* contents
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*/
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static inline void *
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dixLookupPrivate(PrivatePtr *privates, const DevPrivateKey key)
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{
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if (key->size)
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return dixGetPrivateAddr(privates, key);
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else
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return dixGetPrivate(privates, key);
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}
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/*
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* Look up the address of the pointer to the storage
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*
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* This returns the place where the private pointer is stored,
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* which is only valid for privates without predefined storage.
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*/
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static inline void **
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dixLookupPrivateAddr(PrivatePtr *privates, const DevPrivateKey key)
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{
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assert(key->size == 0);
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return (void **) dixGetPrivateAddr(privates, key);
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}
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extern _X_EXPORT Bool
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dixRegisterScreenPrivateKey(DevScreenPrivateKey key, ScreenPtr pScreen,
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DevPrivateType type, unsigned size);
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extern _X_EXPORT DevPrivateKey
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_dixGetScreenPrivateKey(const DevScreenPrivateKey key, ScreenPtr pScreen);
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static inline void *
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dixGetScreenPrivateAddr(PrivatePtr *privates, const DevScreenPrivateKey key,
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ScreenPtr pScreen)
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{
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return dixGetPrivateAddr(privates, _dixGetScreenPrivateKey(key, pScreen));
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}
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static inline void *
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dixGetScreenPrivate(PrivatePtr *privates, const DevScreenPrivateKey key,
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ScreenPtr pScreen)
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{
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return dixGetPrivate(privates, _dixGetScreenPrivateKey(key, pScreen));
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}
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static inline void
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dixSetScreenPrivate(PrivatePtr *privates, const DevScreenPrivateKey key,
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ScreenPtr pScreen, void *val)
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{
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dixSetPrivate(privates, _dixGetScreenPrivateKey(key, pScreen), val);
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}
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static inline void *
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dixLookupScreenPrivate(PrivatePtr *privates, const DevScreenPrivateKey key,
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ScreenPtr pScreen)
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{
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return dixLookupPrivate(privates, _dixGetScreenPrivateKey(key, pScreen));
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}
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static inline void **
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dixLookupScreenPrivateAddr(PrivatePtr *privates, const DevScreenPrivateKey key,
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ScreenPtr pScreen)
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{
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return dixLookupPrivateAddr(privates,
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_dixGetScreenPrivateKey(key, pScreen));
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}
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/*
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* These functions relate to allocations related to a specific screen;
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* space will only be available for objects allocated for use on that
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* screen. As such, only objects which are related directly to a specific
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* screen are candidates for allocation this way, this includes
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* windows, pixmaps, gcs, pictures and colormaps. This key is
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* used just like any other key using dixGetPrivate and friends.
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*
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* This is distinctly different from the ScreenPrivateKeys above which
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* allocate space in global objects like cursor bits for a specific
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* screen, allowing multiple screen-related chunks of storage in a
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* single global object.
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*/
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#define HAVE_SCREEN_SPECIFIC_PRIVATE_KEYS 1
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extern _X_EXPORT Bool
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dixRegisterScreenSpecificPrivateKey(ScreenPtr pScreen, DevPrivateKey key,
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DevPrivateType type, unsigned size);
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/* Clean up screen-specific privates before CloseScreen */
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extern void
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dixFreeScreenSpecificPrivates(ScreenPtr pScreen);
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/* Initialize screen-specific privates in AddScreen */
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extern void
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dixInitScreenSpecificPrivates(ScreenPtr pScreen);
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/* is this private created - so hotplug can avoid crashing */
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Bool dixPrivatesCreated(DevPrivateType type);
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extern _X_EXPORT void *
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_dixAllocateScreenObjectWithPrivates(ScreenPtr pScreen,
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unsigned size,
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unsigned offset,
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DevPrivateType type);
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#define dixAllocateScreenObjectWithPrivates(s, t, type) _dixAllocateScreenObjectWithPrivates(s, sizeof(t), offsetof(t, devPrivates), type)
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extern _X_EXPORT int
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dixScreenSpecificPrivatesSize(ScreenPtr pScreen, DevPrivateType type);
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extern _X_EXPORT void
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_dixInitScreenPrivates(ScreenPtr pScreen, PrivatePtr *privates, void *addr, DevPrivateType type);
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#define dixInitScreenPrivates(s, o, v, type) _dixInitScreenPrivates(s, &(o)->devPrivates, (v), type);
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/*
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* Allocates private data separately from main object.
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*
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* For objects created during server initialization, this allows those
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* privates to be re-allocated as new private keys are registered.
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*
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* This includes screens, the serverClient, default colormaps and
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* extensions entries.
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*/
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extern _X_EXPORT Bool
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dixAllocatePrivates(PrivatePtr *privates, DevPrivateType type);
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/*
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* Frees separately allocated private data
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*/
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extern _X_EXPORT void
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dixFreePrivates(PrivatePtr privates, DevPrivateType type);
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/*
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* Initialize privates by zeroing them
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*/
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extern _X_EXPORT void
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_dixInitPrivates(PrivatePtr *privates, void *addr, DevPrivateType type);
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#define dixInitPrivates(o, v, type) _dixInitPrivates(&(o)->devPrivates, (v), type);
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/*
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* Clean up privates
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*/
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extern _X_EXPORT void
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_dixFiniPrivates(PrivatePtr privates, DevPrivateType type);
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#define dixFiniPrivates(o,t) _dixFiniPrivates((o)->devPrivates,t)
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/*
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* Allocates private data at object creation time. Required
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* for almost all objects, except for the list described
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* above for dixAllocatePrivates.
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*/
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extern _X_EXPORT void *_dixAllocateObjectWithPrivates(unsigned size,
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unsigned clear,
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unsigned offset,
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DevPrivateType type);
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#define dixAllocateObjectWithPrivates(t, type) (t *) _dixAllocateObjectWithPrivates(sizeof(t), sizeof(t), offsetof(t, devPrivates), type)
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extern _X_EXPORT void
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_dixFreeObjectWithPrivates(void *object, PrivatePtr privates,
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DevPrivateType type);
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#define dixFreeObjectWithPrivates(o,t) _dixFreeObjectWithPrivates(o, (o)->devPrivates, t)
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/*
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* Return size of privates for the specified type
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*/
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extern _X_EXPORT int
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dixPrivatesSize(DevPrivateType type);
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/*
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* Dump out private stats to ErrorF
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*/
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extern void
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dixPrivateUsage(void);
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/*
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* Resets the privates subsystem. dixResetPrivates is called from the main loop
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* before each server generation. This function must only be called by main().
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*/
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extern _X_EXPORT void
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dixResetPrivates(void);
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/*
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* Looks up the offset where the devPrivates field is located.
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*
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* Returns -1 if the specified resource has no dev privates.
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* The position of the devPrivates field varies by structure
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* and calling code might only know the resource type, not the
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* structure definition.
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*/
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extern _X_EXPORT int
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dixLookupPrivateOffset(RESTYPE type);
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/*
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* Convenience macro for adding an offset to an object pointer
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* when making a call to one of the devPrivates functions
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*/
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#define DEVPRIV_AT(ptr, offset) ((PrivatePtr *)((char *)(ptr) + offset))
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#endif /* PRIVATES_H */
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