mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-10 11:54:40 +00:00
83 lines
2.5 KiB
C++
83 lines
2.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef GMPSharedMemManager_h_
|
|
#define GMPSharedMemManager_h_
|
|
|
|
#include "mozilla/ipc/Shmem.h"
|
|
#include "nsTArray.h"
|
|
|
|
namespace mozilla {
|
|
namespace gmp {
|
|
|
|
class GMPSharedMemManager;
|
|
|
|
class GMPSharedMem
|
|
{
|
|
public:
|
|
typedef enum {
|
|
kGMPFrameData = 0,
|
|
kGMPEncodedData,
|
|
kGMPNumTypes
|
|
} GMPMemoryClasses;
|
|
|
|
// This is a heuristic - max of 10 free in the Child pool, plus those
|
|
// in-use for the encoder and decoder at the given moment and not yet
|
|
// returned to the parent pool (which is not included). If more than
|
|
// this are needed, we presume the client has either crashed or hung
|
|
// (perhaps temporarily).
|
|
static const uint32_t kGMPBufLimit = 20;
|
|
|
|
GMPSharedMem()
|
|
{
|
|
for (size_t i = 0; i < sizeof(mGmpAllocated)/sizeof(mGmpAllocated[0]); i++) {
|
|
mGmpAllocated[i] = 0;
|
|
}
|
|
}
|
|
virtual ~GMPSharedMem() {}
|
|
|
|
// Parent and child impls will differ here
|
|
virtual void CheckThread() = 0;
|
|
|
|
protected:
|
|
friend class GMPSharedMemManager;
|
|
|
|
nsTArray<ipc::Shmem> mGmpFreelist[GMPSharedMem::kGMPNumTypes];
|
|
uint32_t mGmpAllocated[GMPSharedMem::kGMPNumTypes];
|
|
};
|
|
|
|
class GMPSharedMemManager
|
|
{
|
|
public:
|
|
explicit GMPSharedMemManager(GMPSharedMem *aData) : mData(aData) {}
|
|
virtual ~GMPSharedMemManager() {}
|
|
|
|
virtual bool MgrAllocShmem(GMPSharedMem::GMPMemoryClasses aClass, size_t aSize,
|
|
ipc::Shmem::SharedMemory::SharedMemoryType aType,
|
|
ipc::Shmem* aMem);
|
|
virtual bool MgrDeallocShmem(GMPSharedMem::GMPMemoryClasses aClass, ipc::Shmem& aMem);
|
|
|
|
// So we can know if data is "piling up" for the plugin - I.e. it's hung or crashed
|
|
virtual uint32_t NumInUse(GMPSharedMem::GMPMemoryClasses aClass);
|
|
|
|
// These have to be implemented using the AllocShmem/etc provided by the IPDL-generated interfaces,
|
|
// so have the Parent/Child implement them.
|
|
virtual bool Alloc(size_t aSize, ipc::Shmem::SharedMemory::SharedMemoryType aType, ipc::Shmem* aMem) = 0;
|
|
virtual void Dealloc(ipc::Shmem& aMem) = 0;
|
|
|
|
private:
|
|
nsTArray<ipc::Shmem>& GetGmpFreelist(GMPSharedMem::GMPMemoryClasses aTypes)
|
|
{
|
|
return mData->mGmpFreelist[aTypes];
|
|
}
|
|
|
|
GMPSharedMem *mData;
|
|
};
|
|
|
|
} // namespace gmp
|
|
} // namespace mozilla
|
|
|
|
#endif // GMPSharedMemManager_h_
|