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b1e7992b82
Backed out changeset 1099d6f15f9f (bug 1265824) Backed out changeset b5ba15b1a70f (bug 1265824) Backed out changeset 51795de4adaf (bug 1265824) Backed out changeset be68741ff4ce (bug 1265824) Backed out changeset 4731dc56702d (bug 1265824) Backed out changeset 984133e9614b (bug 1265824) Backed out changeset efce316a4425 (bug 1265824) Backed out changeset 367abce30668 (bug 1265824)
121 lines
2.9 KiB
C++
121 lines
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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#include "chrome/common/mach_ipc_mac.h"
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#ifdef FUZZING
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#include "SharedMemoryFuzzer.h"
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#endif
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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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enum {
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kGetPortsMsg = 1,
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kSharePortsMsg,
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kWaitForTexturesMsg,
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kUpdateTextureLocksMsg,
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kReturnIdMsg,
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kReturnWaitForTexturesMsg,
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kReturnPortsMsg,
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kShutdownMsg,
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kCleanupMsg,
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};
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struct MemoryPorts {
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MachPortSender* mSender;
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ReceivePort* mReceiver;
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MemoryPorts() = default;
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MemoryPorts(MachPortSender* sender, ReceivePort* receiver)
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: mSender(sender), mReceiver(receiver) {}
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};
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class SharedMemoryBasic final : public SharedMemoryCommon<mach_port_t>
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{
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public:
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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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static bool SendMachMessage(pid_t pid,
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MachSendMessage& message,
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MachReceiveMessage* response);
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SharedMemoryBasic();
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virtual bool SetHandle(const Handle& aHandle, OpenRights aRights) override;
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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 CloseHandle() override;
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virtual void* memory() const override
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{
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#ifdef FUZZING
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return SharedMemoryFuzzer::MutateSharedMemory(mMemory, mAllocSize);
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#else
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return mMemory;
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#endif
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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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virtual bool IsHandleValid(const Handle &aHandle) const override;
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virtual bool ShareToProcess(base::ProcessId aProcessId,
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Handle* aNewHandle) override;
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private:
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~SharedMemoryBasic();
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void Unmap();
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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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// Access rights to map an existing region with.
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OpenRights mOpenRights;
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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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