/*
* Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. The rights granted to you under the
- * License may not be used to create, or enable the creation or
- * redistribution of, unlawful or unlicensed copies of an Apple operating
- * system, or to circumvent, violate, or enable the circumvention or
- * violation of, any terms of an Apple operating system software license
- * agreement.
- *
- * Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
* limitations under the License.
- *
- * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
* Spaces hold capabilities for ipc_object_t's.
* Each ipc_entry_t records a capability. Most capabilities have
* small names, and the entries are elements of a table.
- * Capabilities can have large names, and a splay tree holds
- * those entries. The cutoff point between the table and the tree
- * is adjusted dynamically to minimize memory consumption.
*
* The ie_index field of entries in the table implements
* a ordered hash table with open addressing and linear probing.
struct ipc_entry {
struct ipc_object *ie_object;
ipc_entry_bits_t ie_bits;
+ mach_port_index_t ie_index;
union {
mach_port_index_t next; /* next in freelist, or... */
ipc_table_index_t request; /* dead name request notify */
} index;
- union {
- mach_port_index_t table;
- struct ipc_tree_entry *tree;
- } hash;
};
#define ie_request index.request
#define ie_next index.next
-#define ie_index hash.table
+
+#define IE_REQ_NONE 0 /* no request */
#define IE_BITS_UREFS_MASK 0x0000ffff /* 16 bits of user-reference */
#define IE_BITS_UREFS(bits) ((bits) & IE_BITS_UREFS_MASK)
#define IE_BITS_TYPE_MASK 0x001f0000 /* 5 bits of capability type */
#define IE_BITS_TYPE(bits) ((bits) & IE_BITS_TYPE_MASK)
-#define IE_BITS_COLLISION 0x00800000 /* 1 bit for collisions */
-
-
#ifndef NO_PORT_GEN
#define IE_BITS_GEN_MASK 0xff000000 /* 8 bits for generation */
#define IE_BITS_GEN(bits) ((bits) & IE_BITS_GEN_MASK)
#define IE_BITS_RIGHT_MASK 0x007fffff /* relevant to the right */
-struct ipc_tree_entry {
- struct ipc_entry ite_entry;
- mach_port_name_t ite_name;
- struct ipc_space *ite_space;
- struct ipc_tree_entry *ite_lchild;
- struct ipc_tree_entry *ite_rchild;
-};
-
-#define ite_bits ite_entry.ie_bits
-#define ite_object ite_entry.ie_object
-#define ite_request ite_entry.ie_request
-#define ite_next ite_entry.hash.tree
-
-extern zone_t ipc_tree_entry_zone;
-
-#define ite_alloc() ((ipc_tree_entry_t) zalloc(ipc_tree_entry_zone))
-#define ite_free(ite) zfree(ipc_tree_entry_zone, (ite))
-
/*
* Exported interfaces
*/
ipc_space_t space,
mach_port_name_t name);
+/* Hold a number of entries in a locked space */
+extern kern_return_t ipc_entries_hold(
+ ipc_space_t space,
+ natural_t count);
+
+/* claim and initialize a held entry in a locked space */
+extern kern_return_t ipc_entry_claim(
+ ipc_space_t space,
+ mach_port_name_t *namep,
+ ipc_entry_t *entryp);
+
/* Allocate an entry in a space */
extern kern_return_t ipc_entry_get(
ipc_space_t space,
mach_port_name_t name,
ipc_entry_t entry);
+/* Mark and entry modified in a space */
+extern void ipc_entry_modified(
+ ipc_space_t space,
+ mach_port_name_t name,
+ ipc_entry_t entry);
+
/* Grow the table in a space */
extern kern_return_t ipc_entry_grow_table(
ipc_space_t space,
ipc_table_elems_t target_size);
+/* mask on/off default entry generation bits */
+extern mach_port_name_t ipc_entry_name_mask(
+ mach_port_name_t name);
#endif /* _IPC_IPC_ENTRY_H_ */
projects / apple / xnu.git / blobdiff