1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/layers/ipc/FenceUtilsGonk.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,123 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + * vim: sw=2 ts=8 et :
1.6 + */
1.7 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.8 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.9 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.10 +
1.11 +#include "GLContext.h"
1.12 +#include "mozilla/unused.h"
1.13 +#include "nsXULAppAPI.h"
1.14 +
1.15 +#include "FenceUtilsGonk.h"
1.16 +
1.17 +using namespace android;
1.18 +using namespace base;
1.19 +using namespace mozilla::layers;
1.20 +
1.21 +namespace IPC {
1.22 +
1.23 +void
1.24 +ParamTraits<FenceHandle>::Write(Message* aMsg,
1.25 + const paramType& aParam)
1.26 +{
1.27 +#if ANDROID_VERSION >= 19
1.28 + sp<Fence> flattenable = aParam.mFence;
1.29 +#else
1.30 + Flattenable *flattenable = aParam.mFence.get();
1.31 +#endif
1.32 + size_t nbytes = flattenable->getFlattenedSize();
1.33 + size_t nfds = flattenable->getFdCount();
1.34 +
1.35 + char data[nbytes];
1.36 + int fds[nfds];
1.37 +
1.38 +#if ANDROID_VERSION >= 19
1.39 + // Make a copy of "data" and "fds" for flatten() to avoid casting problem
1.40 + void *pdata = (void *)data;
1.41 + int *pfds = fds;
1.42 +
1.43 + flattenable->flatten(pdata, nbytes, pfds, nfds);
1.44 +
1.45 + // In Kitkat, flatten() will change the value of nbytes and nfds, which dues
1.46 + // to multiple parcelable object consumption. The actual size and fd count
1.47 + // which returned by getFlattenedSize() and getFdCount() are not changed.
1.48 + // So we change nbytes and nfds back by call corresponding calls.
1.49 + nbytes = flattenable->getFlattenedSize();
1.50 + nfds = flattenable->getFdCount();
1.51 +#else
1.52 + flattenable->flatten(data, nbytes, fds, nfds);
1.53 +#endif
1.54 + aMsg->WriteSize(nbytes);
1.55 + aMsg->WriteSize(nfds);
1.56 +
1.57 + aMsg->WriteBytes(data, nbytes);
1.58 + for (size_t n = 0; n < nfds; ++n) {
1.59 + // These buffers can't die in transit because they're created
1.60 + // synchonously and the parent-side buffer can only be dropped if
1.61 + // there's a crash.
1.62 + aMsg->WriteFileDescriptor(FileDescriptor(fds[n], false));
1.63 + }
1.64 +}
1.65 +
1.66 +bool
1.67 +ParamTraits<FenceHandle>::Read(const Message* aMsg,
1.68 + void** aIter, paramType* aResult)
1.69 +{
1.70 + size_t nbytes;
1.71 + size_t nfds;
1.72 + const char* data;
1.73 +
1.74 + if (!aMsg->ReadSize(aIter, &nbytes) ||
1.75 + !aMsg->ReadSize(aIter, &nfds) ||
1.76 + !aMsg->ReadBytes(aIter, &data, nbytes)) {
1.77 + return false;
1.78 + }
1.79 +
1.80 + int fds[nfds];
1.81 +
1.82 + for (size_t n = 0; n < nfds; ++n) {
1.83 + FileDescriptor fd;
1.84 + if (!aMsg->ReadFileDescriptor(aIter, &fd)) {
1.85 + return false;
1.86 + }
1.87 + // If the GraphicBuffer was shared cross-process, SCM_RIGHTS does
1.88 + // the right thing and dup's the fd. If it's shared cross-thread,
1.89 + // SCM_RIGHTS doesn't dup the fd. That's surprising, but we just
1.90 + // deal with it here. NB: only the "default" (master) process can
1.91 + // alloc gralloc buffers.
1.92 + bool sameProcess = (XRE_GetProcessType() == GeckoProcessType_Default);
1.93 + int dupFd = sameProcess ? dup(fd.fd) : fd.fd;
1.94 + fds[n] = dupFd;
1.95 + }
1.96 +
1.97 + sp<Fence> buffer(new Fence());
1.98 +#if ANDROID_VERSION >= 19
1.99 + // Make a copy of "data" and "fds" for unflatten() to avoid casting problem
1.100 + void const *pdata = (void const *)data;
1.101 + int const *pfds = fds;
1.102 +
1.103 + if (NO_ERROR == buffer->unflatten(pdata, nbytes, pfds, nfds)) {
1.104 +#else
1.105 + Flattenable *flattenable = buffer.get();
1.106 +
1.107 + if (NO_ERROR == flattenable->unflatten(data, nbytes, fds, nfds)) {
1.108 +#endif
1.109 + aResult->mFence = buffer;
1.110 + return true;
1.111 + }
1.112 + return false;
1.113 +}
1.114 +
1.115 +} // namespace IPC
1.116 +
1.117 +namespace mozilla {
1.118 +namespace layers {
1.119 +
1.120 +FenceHandle::FenceHandle(const sp<Fence>& aFence)
1.121 + : mFence(aFence)
1.122 +{
1.123 +}
1.124 +
1.125 +} // namespace layers
1.126 +} // namespace mozilla
