3 * This is the kernel interface through which objects, interfaces, and
4 * interfaces are opened, created and destroyed. The instantiated objmgr
5 * object is always id 1.
9 guid: "C227980E-EA8B-11D9-84F1-000A95BB581A";
12 struct VStruct virtual {
13 guid: "E2E3AF5F-2858-11DA-9FBB-00112431A05E";
17 // FIXME: make this a built-in ID type that fixes things
18 // up when moving between systems. It can be native word
19 // sized, rather than always long.
25 Bool, Short, Int, Long,
27 FShort, FLong, Octet, Enum,
28 Bitfield, Interface, Struct
31 ID id; // ID of interface, struct, bitfield, or enum (or 0).
32 ulong length; // Type length: bits in bitfield, bytes in
33 // struct, max value of enum, or 0.
36 // Inclusive lower and upper bounds of the array. If the
37 // array has no upper bound, upper should be -1. If the
38 // array has no lower bound, lower should be 0. If this is
39 // not an array, both should be 0.
53 copy:1, /* If input argument references memory, a
54 copy will be made (possibly via copy-on-write)
55 before the method receives control.
56 If the parameter is inout, the changes (if any)
57 will be copied to the original memory area (or
58 the copy-on-write mapping will occur on return
59 from the method). This is an implementation
60 attribute and is incompatible with shared. */
62 shared:1, /* If input argument references memory, the
63 method may continue to access the memory
64 until it explicitly releases it. The memory
65 region must remain valid until then, and all
66 changes to the memory area will be shared by
67 both the caller and the callee. This is an
68 interface attribute and is incompatible with
69 copy. The argument should be page aligned
70 and its size must be a multiple of the page
71 size; otherwise, the caller will have
72 access to data outside the region passed. */
78 ulong entry; /* Address of method entry point */
82 async:1, /* Method is invoked indirectly via message passing,
83 and the caller does not wait for completion. No
84 out parameters may be used in such a method. */
86 ordered:1, /* Method requires strong ordering; all ordered methods
87 from the same thread will be delivered in order, and
88 the next such method will not be delivered until
89 the recipient of the previous invocation message
90 acknowledges it. This flag is only valid on async
91 methods, as synchronous methods are inherently
94 An alternative is to invoke methods through
95 a serialization object, which allows finer
96 control over the level of serialization.
97 This flag may go away in favor of always
98 using explicit serialization objects when
104 ulong[] super; /* superinterface(es) */
105 MethodDesc[] methods;
106 ulong instantiate, subinterface, remove; /* access tokens */
119 guid: "C30D0A85-EA8B-11D9-B985-000A95BB581A";
120 query_interface(Interface iface, bool supported out);
121 instantiate(Object instance out);
124 interface Interface {
125 guid: "C36EBE18-EA8B-11D9-896D-000A95BB581A";
129 guid: "C3D1BA69-EA8B-11D9-9439-000A95BB581A";
133 guid: "C4384909-EA8B-11D9-B856-000A95BB581A";
137 guid: "C4A89048-EA8B-11D9-BB2C-000A95BB581A";
139 // Returns the object from which the filter was created.
140 // This will only succeed if the calling process already
141 // has a reference to the real object. If the filter
142 // points to another filter, it will return the transitive
143 // real object if possible, or else the filter closest to
144 // the real object for which the process already has a
145 // reference. If neither the real object nor a closer
146 // filter can be returned, this filter itself is returned.
147 // This should not be used for comparing filter references,
148 // as separately created filters for the same object will
149 // have different IDs and pointers, even if they contain
150 // the same subset of interfaces.
152 get_real_obj(Object obj out);
154 // Returns a local ID of the real object, regardless of whether
155 // the calling process has a reference to it, or whether there
156 // are other intervening filters. The ID cannot be used to
157 // invoke methods, but it can be used to compare the identities
158 // of the objects behind different filter objects. If a real
159 // reference to the object is later obtained, it will have
160 // the same local ID.
162 get_real_obj_id(ID id out);
165 interface ObjectManager {
166 guid: "C28596AB-EA8B-11D9-8DEB-000A95BB581A";
168 new_object(ID cla, ID obj out);
169 delete_object(ID obj) async;
171 new_interface(ID cd, ID cla out);
172 delete_interface(ID cla, bool call_del) async;
174 open_object(ID obj, uint handle out);
175 close_object(uint handle) async;
177 // Create a filter object that implements only some of the
178 // interfaces implemented by "obj". This is useful to create a
179 // more limited reference to pass to less trusted processes. If
180 // "exclude" is true, then all interfaces but those specified will
181 // be included. Otherwise, only those interfaces specified will be
182 // included. A filter with no interfaces may be created to act as
183 // a (mostly) opaque handle.
185 // A holder of a filter reference can convert it into the real
186 // object if it already has (or later obtains) a reference to to
187 // the real object. It can also compare the identities of
188 // separately created filters pointing at the same object
189 // regardless of what it has a real reference to. Thus, filters
190 // should be used only to limit access granted by passing a
191 // reference to another process; it should not be used to hide the
192 // identity of the real object.
194 create_filter(Object obj, bool exclude, Interface[] ifaces,
198 // This is a generic Factory interface; specific factories may
199 // (but do not need to) implement a more specific interface that
200 // guarantees that the generated object will comply with some
201 // particular interface.
204 guid: "9C084DD0-5D69-11DA-BD5A-000A95BB581A";
205 create(Object obj out);