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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gfx/gpu_fence.h"
#include "base/logging.h"
#include "base/notreached.h"
#include "base/time/time.h"
#include "build/build_config.h"
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID)
#include <sync/sync.h>
#endif
namespace gfx {
GpuFence::GpuFence(GpuFenceHandle fence_handle)
: fence_handle_(std::move(fence_handle)) {}
GpuFence::~GpuFence() = default;
GpuFence::GpuFence(GpuFence&& other) = default;
GpuFence& GpuFence::operator=(GpuFence&& other) = default;
const GpuFenceHandle& GpuFence::GetGpuFenceHandle() const {
return fence_handle_;
}
ClientGpuFence GpuFence::AsClientGpuFence() {
return reinterpret_cast<ClientGpuFence>(this);
}
// static
GpuFence* GpuFence::FromClientGpuFence(ClientGpuFence gpu_fence) {
return reinterpret_cast<GpuFence*>(gpu_fence);
}
void GpuFence::Wait() {
if (fence_handle_.is_null()) {
return;
}
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID)
static const int kInfiniteSyncWaitTimeout = -1;
DCHECK_GE(fence_handle_.Peek(), 0);
if (sync_wait(fence_handle_.Peek(), kInfiniteSyncWaitTimeout) < 0) {
LOG(FATAL) << "Failed while waiting for gpu fence fd";
}
#else
NOTREACHED();
#endif
}
// static
GpuFence::FenceStatus GpuFence::GetStatusChangeTime(int fd,
base::TimeTicks* time) {
DCHECK_NE(fd, -1);
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID)
auto info =
std::unique_ptr<sync_fence_info_data, void (*)(sync_fence_info_data*)>{
sync_fence_info(fd), sync_fence_info_free};
if (!info) {
LOG(ERROR) << "sync_fence_info returned null for fd : " << fd;
return FenceStatus::kInvalid;
}
// Not signalled yet.
if (info->status != 1) {
return FenceStatus::kNotSignaled;
}
uint64_t timestamp_ns = 0u;
struct sync_pt_info* pt_info = nullptr;
while ((pt_info = sync_pt_info(info.get(), pt_info)))
timestamp_ns = std::max(timestamp_ns, pt_info->timestamp_ns);
if (timestamp_ns == 0u) {
LOG(ERROR) << "No timestamp provided from sync_pt_info for fd : " << fd;
return FenceStatus::kInvalid;
}
*time = base::TimeTicks() + base::Nanoseconds(timestamp_ns);
return FenceStatus::kSignaled;
#else
NOTREACHED();
#endif
}
base::TimeTicks GpuFence::GetMaxTimestamp() const {
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID)
base::TimeTicks timestamp;
FenceStatus status = GetStatusChangeTime(fence_handle_.Peek(), ×tamp);
DCHECK_EQ(status, FenceStatus::kSignaled);
return timestamp;
#else
NOTREACHED();
#endif
}
} // namespace gfx
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