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Diffstat (limited to 'ipc/ipc_entry.h')
| -rw-r--r-- | ipc/ipc_entry.h | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/ipc/ipc_entry.h b/ipc/ipc_entry.h new file mode 100644 index 0000000..9f7b593 --- /dev/null +++ b/ipc/ipc_entry.h @@ -0,0 +1,110 @@ +/* + * Mach Operating System + * Copyright (c) 1991,1990,1989 Carnegie Mellon University. + * Copyright (c) 1993,1994 The University of Utah and + * the Computer Systems Laboratory (CSL). + * All rights reserved. + * + * Permission to use, copy, modify and distribute this software and its + * documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON, THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF + * THIS SOFTWARE IN ITS "AS IS" CONDITION, AND DISCLAIM ANY LIABILITY + * OF ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF + * THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie Mellon + * the rights to redistribute these changes. + */ +/* + * File: ipc/ipc_entry.h + * Author: Rich Draves + * Date: 1989 + * + * Definitions for translation entries, which represent + * tasks' capabilities for ports and port sets. + */ + +#ifndef _IPC_IPC_ENTRY_H_ +#define _IPC_IPC_ENTRY_H_ + +#include <mach/mach_types.h> +#include <mach/port.h> +#include <mach/kern_return.h> +#include <kern/slab.h> +#include <ipc/port.h> +#include <ipc/ipc_table.h> +#include <ipc/ipc_types.h> + +/* + * Spaces hold capabilities for ipc_object_t's (ports and port sets). + * Each ipc_entry_t records a capability. + */ + +typedef unsigned int ipc_entry_bits_t; +typedef ipc_table_elems_t ipc_entry_num_t; /* number of entries */ + +typedef struct ipc_entry { + mach_port_name_t ie_name; + ipc_entry_bits_t ie_bits; + struct ipc_object *ie_object; + union { + struct ipc_entry *next_free; + /*XXX ipc_port_request_index_t request;*/ + unsigned int request; + } index; +} *ipc_entry_t; + +#define IE_NULL ((ipc_entry_t) 0) + +#define ie_request index.request +#define ie_next_free index.next_free + +#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_MAREQUEST 0x00200000 /* 1 bit for msg-accepted */ + +#define IE_BITS_RIGHT_MASK 0x003fffff /* relevant to the right */ + +#if PORT_GENERATIONS +#error "not supported" +#define IE_BITS_GEN_MASK 0xff000000U /* 8 bits for generation */ +#define IE_BITS_GEN(bits) ((bits) & IE_BITS_GEN_MASK) +#define IE_BITS_GEN_ONE 0x01000000 /* low bit of generation */ +#else +#define IE_BITS_GEN_MASK 0 +#define IE_BITS_GEN(bits) 0 +#define IE_BITS_GEN_ONE 0 +#endif + + +extern struct kmem_cache ipc_entry_cache; +#define ie_alloc() ((ipc_entry_t) kmem_cache_alloc(&ipc_entry_cache)) +#define ie_free(e) kmem_cache_free(&ipc_entry_cache, (vm_offset_t) (e)) + +extern kern_return_t +ipc_entry_alloc(ipc_space_t space, mach_port_name_t *namep, ipc_entry_t *entryp); + +extern kern_return_t +ipc_entry_alloc_name(ipc_space_t space, mach_port_name_t name, ipc_entry_t *entryp); + +ipc_entry_t +db_ipc_object_by_name( + task_t task, + mach_port_name_t name); + +#endif /* _IPC_IPC_ENTRY_H_ */ |