mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-29 00:36:10 +03:00
80 lines
2.7 KiB
C++
80 lines
2.7 KiB
C++
// Copyright 2012 The Chromium Authors
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#ifndef BASE_MAC_SCOPED_MACH_PORT_H_
|
|
#define BASE_MAC_SCOPED_MACH_PORT_H_
|
|
|
|
#include <mach/mach.h>
|
|
|
|
#include "base/base_export.h"
|
|
#include "base/scoped_generic.h"
|
|
#include "third_party/abseil-cpp/absl/types/optional.h"
|
|
|
|
namespace base::mac {
|
|
|
|
namespace internal {
|
|
|
|
struct BASE_EXPORT SendRightTraits {
|
|
static mach_port_t InvalidValue() {
|
|
return MACH_PORT_NULL;
|
|
}
|
|
|
|
BASE_EXPORT static void Free(mach_port_t port);
|
|
};
|
|
|
|
struct BASE_EXPORT ReceiveRightTraits {
|
|
static mach_port_t InvalidValue() {
|
|
return MACH_PORT_NULL;
|
|
}
|
|
|
|
BASE_EXPORT static void Free(mach_port_t port);
|
|
};
|
|
|
|
struct PortSetTraits {
|
|
static mach_port_t InvalidValue() {
|
|
return MACH_PORT_NULL;
|
|
}
|
|
|
|
BASE_EXPORT static void Free(mach_port_t port);
|
|
};
|
|
|
|
} // namespace internal
|
|
|
|
// A scoper for handling a Mach port that names a send right. Send rights are
|
|
// reference counted, and this takes ownership of the right on construction
|
|
// and then removes a reference to the right on destruction. If the reference
|
|
// is the last one on the right, the right is deallocated.
|
|
using ScopedMachSendRight =
|
|
ScopedGeneric<mach_port_t, internal::SendRightTraits>;
|
|
|
|
// A scoper for handling a Mach port's receive right. There is only one
|
|
// receive right per port. This takes ownership of the receive right on
|
|
// construction and then destroys the right on destruction, turning all
|
|
// outstanding send rights into dead names.
|
|
using ScopedMachReceiveRight =
|
|
ScopedGeneric<mach_port_t, internal::ReceiveRightTraits>;
|
|
|
|
// A scoper for handling a Mach port set. A port set can have only one
|
|
// reference. This takes ownership of that single reference on construction and
|
|
// destroys the port set on destruction. Destroying a port set does not destroy
|
|
// the receive rights that are members of the port set.
|
|
using ScopedMachPortSet = ScopedGeneric<mach_port_t, internal::PortSetTraits>;
|
|
|
|
// Constructs a Mach port receive right and places the result in |receive|.
|
|
// If |send| is non-null, a send right will be created as well and stored
|
|
// there. If |queue_limit| is specified, the receive right will be constructed
|
|
// with the specified mpo_qlmit. Returns true on success and false on failure.
|
|
BASE_EXPORT bool CreateMachPort(
|
|
ScopedMachReceiveRight* receive,
|
|
ScopedMachSendRight* send,
|
|
absl::optional<mach_port_msgcount_t> queue_limit = absl::nullopt);
|
|
|
|
// Increases the user reference count for MACH_PORT_RIGHT_SEND by 1 and returns
|
|
// a new scoper to manage the additional right.
|
|
BASE_EXPORT ScopedMachSendRight RetainMachSendRight(mach_port_t port);
|
|
|
|
} // namespace base::mac
|
|
|
|
#endif // BASE_MAC_SCOPED_MACH_PORT_H_
|