87 lines
2.0 KiB
C++
87 lines
2.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=8 et :
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*/
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_ipc_SharedMemoryBasic_mach_h
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#define mozilla_ipc_SharedMemoryBasic_mach_h
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#include "base/file_descriptor_posix.h"
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#include "base/process.h"
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#include "SharedMemory.h"
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#include <mach/port.h>
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//
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// This is a low-level wrapper around platform shared memory. Don't
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// use it directly; use Shmem allocated through IPDL interfaces.
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//
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class MachPortSender;
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class ReceivePort;
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namespace mozilla {
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namespace ipc {
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class SharedMemoryBasic final : public SharedMemory
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{
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public:
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typedef mach_port_t Handle;
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static void SetupMachMemory(pid_t pid,
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ReceivePort* listen_port,
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MachPortSender* listen_port_ack,
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MachPortSender* send_port,
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ReceivePort* send_port_ack,
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bool pidIsParent);
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static void CleanupForPid(pid_t pid);
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static void Shutdown();
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SharedMemoryBasic();
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explicit SharedMemoryBasic(Handle aHandle);
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virtual bool Create(size_t aNbytes) override;
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virtual bool Map(size_t nBytes) override;
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virtual void* memory() const override
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{
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return mMemory;
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}
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virtual SharedMemoryType Type() const override
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{
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return TYPE_BASIC;
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}
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static Handle NULLHandle()
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{
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return Handle();
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}
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static bool IsHandleValid(const Handle &aHandle);
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bool ShareToProcess(base::ProcessId aProcessId,
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Handle* aNewHandle);
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private:
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~SharedMemoryBasic();
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void Unmap();
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void Destroy();
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mach_port_t mPort;
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// Pointer to mapped region, null if unmapped.
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void *mMemory;
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};
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} // namespace ipc
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} // namespace mozilla
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#endif // ifndef mozilla_ipc_SharedMemoryBasic_mach_h
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