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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/ozone/platform/drm/gpu/gpu_lock.h"
#include <sys/file.h>
#include <unistd.h>
#include "base/logging.h"
#include "base/posix/eintr_wrapper.h"
namespace ui {
namespace {
const char kGpuLockFile[] = "/run/frecon";
}
GpuLock::GpuLock() {
fd_ = open(kGpuLockFile, O_RDWR);
if (fd_ < 0) {
PLOG(ERROR) << "Failed to open lock file '" << kGpuLockFile << "'";
return;
}
VLOG(1) << "Taking write lock on '" << kGpuLockFile << "'";
if (HANDLE_EINTR(flock(fd_, LOCK_EX)))
PLOG(ERROR) << "Error while trying to get lock on '" << kGpuLockFile << "'";
VLOG(1) << "Done trying to take write lock on '" << kGpuLockFile << "'";
}
GpuLock::~GpuLock() {
// Failed to open the lock file, so nothing to do here.
if (fd_ < 0)
return;
VLOG(1) << "Releasing write lock on '" << kGpuLockFile << "'";
close(fd_);
}
} // namespace ui
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