xnu-3789.1.32.tar.gz

[apple/xnu.git] / osfmk / ipc / ipc_entry.h

diff --git a/osfmk/ipc/ipc_entry.h b/osfmk/ipc/ipc_entry.h
index 8b69e4ec32de908e257252293ad9462954958371..531434edf3c0cefbbd7bcac99bd04a73c5359893 100644 (file)
--- a/osfmk/ipc/ipc_entry.h
+++ b/osfmk/ipc/ipc_entry.h
@@ -1,14 +1,19 @@
 /*
  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_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. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * 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
@@ -18,7 +23,7 @@
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * 
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*
  * @OSF_COPYRIGHT@
@@ -75,9 +80,6 @@
  *     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.
@@ -95,19 +97,17 @@
 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)
@@ -115,9 +115,6 @@ struct ipc_entry {
 #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)
@@ -133,24 +130,6 @@ struct ipc_entry {
 
 #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
  */
@@ -160,6 +139,17 @@ extern ipc_entry_t ipc_entry_lookup(
        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,
@@ -184,9 +174,18 @@ extern void ipc_entry_dealloc(
        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_ */