1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "base/mac/scoped_mach_port.h"
6
7 #include "base/mac/mach_logging.h"
8
9 namespace base {
10 namespace mac {
11 namespace internal {
12
13 // static
Free(mach_port_t port)14 void SendRightTraits::Free(mach_port_t port) {
15 kern_return_t kr = mach_port_deallocate(mach_task_self(), port);
16 MACH_LOG_IF(ERROR, kr != KERN_SUCCESS, kr)
17 << "ScopedMachSendRight mach_port_deallocate";
18 }
19
20 // static
Free(mach_port_t port)21 void ReceiveRightTraits::Free(mach_port_t port) {
22 kern_return_t kr =
23 mach_port_mod_refs(mach_task_self(), port, MACH_PORT_RIGHT_RECEIVE, -1);
24 MACH_LOG_IF(ERROR, kr != KERN_SUCCESS, kr)
25 << "ScopedMachReceiveRight mach_port_mod_refs";
26 }
27
28 // static
Free(mach_port_t port)29 void PortSetTraits::Free(mach_port_t port) {
30 kern_return_t kr =
31 mach_port_mod_refs(mach_task_self(), port, MACH_PORT_RIGHT_PORT_SET, -1);
32 MACH_LOG_IF(ERROR, kr != KERN_SUCCESS, kr)
33 << "ScopedMachPortSet mach_port_mod_refs";
34 }
35
36 } // namespace internal
37
CreateMachPort(ScopedMachReceiveRight * receive,ScopedMachSendRight * send,Optional<mach_port_msgcount_t> queue_limit)38 bool CreateMachPort(ScopedMachReceiveRight* receive,
39 ScopedMachSendRight* send,
40 Optional<mach_port_msgcount_t> queue_limit) {
41 mach_port_options_t options{};
42 options.flags = (send != nullptr ? MPO_INSERT_SEND_RIGHT : 0);
43
44 if (queue_limit.has_value()) {
45 options.flags |= MPO_QLIMIT;
46 options.mpl.mpl_qlimit = *queue_limit;
47 }
48
49 kern_return_t kr =
50 mach_port_construct(mach_task_self(), &options, 0,
51 ScopedMachReceiveRight::Receiver(*receive).get());
52 if (kr != KERN_SUCCESS) {
53 MACH_LOG(ERROR, kr) << "mach_port_construct";
54 return false;
55 }
56
57 // Multiple rights are coalesced to the same name in a task, so assign the
58 // send rights to the same name.
59 if (send) {
60 send->reset(receive->get());
61 }
62
63 return true;
64 }
65
RetainMachSendRight(mach_port_t port)66 ScopedMachSendRight RetainMachSendRight(mach_port_t port) {
67 kern_return_t kr =
68 mach_port_mod_refs(mach_task_self(), port, MACH_PORT_RIGHT_SEND, 1);
69 if (kr == KERN_SUCCESS)
70 return ScopedMachSendRight(port);
71 MACH_DLOG(ERROR, kr) << "mach_port_mod_refs +1";
72 return {};
73 }
74
75 } // namespace mac
76 } // namespace base
77