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// Copyright (c) 2011 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 "../common/command_buffer.h"
#include "../common/logging.h"
namespace gpu {
ReadWriteTokens::ReadWriteTokens()
: last_token_read(-1), last_token_written(-1) {
}
ReadWriteTokens::ReadWriteTokens(int32 read, int32 written)
: last_token_read(read), last_token_written(written) {
}
bool ReadWriteTokens::InRange(int32 token) const {
int32 min = last_token_read;
int32 max = last_token_written;
GPU_DCHECK_GE(min, 0);
GPU_DCHECK_GE(max, 0);
if (min <= max) {
// token should be in [min .. max)
return (token >= min) && (token < max);
}
// token should be in [0 .. max) or [min .. wrap token)
return (token >= min) || (token < max);
}
} // namespace gpu
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