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// Copyright 2021 gRPC authors. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. #ifndef GRPC_SRC_CORE_LIB_RESOURCE_QUOTA_THREAD_QUOTA_H #define GRPC_SRC_CORE_LIB_RESOURCE_QUOTA_THREAD_QUOTA_H #include <grpc/support/port_platform.h> #include <cstddef> #include <limits> #include "absl/base/thread_annotations.h" #include "src/core/util/ref_counted.h" #include "src/core/util/ref_counted_ptr.h" #include "src/core/util/sync.h" namespace grpc_core { // Tracks the amount of threads in a resource quota. class ThreadQuota : public RefCounted<ThreadQuota> { public: ThreadQuota(); ~ThreadQuota() override; ThreadQuota(const ThreadQuota&) = delete; ThreadQuota& operator=(const ThreadQuota&) = delete; // Set the maximum number of threads that can be used by this quota. // If there are more, new reservations will fail until the quota is available. void SetMax(size_t new_max); // Try to allocate some number of threads. // Returns true if the allocation succeeded, false otherwise. bool Reserve(size_t num_threads); // Release some number of threads. void Release(size_t num_threads); private: Mutex mu_; size_t allocated_ ABSL_GUARDED_BY(mu_) = 0; size_t max_ ABSL_GUARDED_BY(mu_) = std::numeric_limits<size_t>::max(); }; using ThreadQuotaPtr = RefCountedPtr<ThreadQuota>; } // namespace grpc_core #endif // GRPC_SRC_CORE_LIB_RESOURCE_QUOTA_THREAD_QUOTA_H
Version data entries
1 entries across 1 versions & 1 rubygems
Version | Path |
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grpc-1.68.1 | src/core/lib/resource_quota/thread_quota.h |