52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
/* Copyright 2017 The OpenXLA Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==============================================================================*/
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#ifndef XLA_SERVICE_CHANNEL_TRACKER_H_
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#define XLA_SERVICE_CHANNEL_TRACKER_H_
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#include "xla/statusor.h"
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#include "xla/xla_data.pb.h"
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namespace xla {
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// Tracks channels between computations in the XLA service. Channels
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// are associated with a unique handle and can be resolved from the handle for
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// later use.
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//
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// TODO(b/34027823): Destruct channels when all the associated computations that
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// communicate via each channel are destructed.
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class ChannelTracker {
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public:
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ChannelTracker() = default;
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// Creates a new Channel object and returns the corresponding
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// ChannelHandle for it.
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StatusOr<ChannelHandle> NewChannel(ChannelHandle::ChannelType type);
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private:
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// Guards the channel mapping.
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absl::Mutex channel_mutex_;
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// The next sequence number to assign to a channel.
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int64_t next_channel_ ABSL_GUARDED_BY(channel_mutex_) = 1;
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ChannelTracker(const ChannelTracker&) = delete;
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ChannelTracker& operator=(const ChannelTracker&) = delete;
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};
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} // namespace xla
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#endif // XLA_SERVICE_CHANNEL_TRACKER_H_
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