[GitHub] [incubator-brpc] jasonszang opened a new pull request #749: Modernizing bthread: modern style C++ bthread support library, the essential subset

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jasonszang opened a new pull request #749: Modernizing bthread: modern style C++ bthread support library, the essential subset
URL: https://github.com/apache/incubator-brpc/pull/749
 
 
   This PR provides a subset of concurrency supporting features provided by Thread Support Library
   in C++11. The final goal of this PR and planned following ones is to provide a full fledged modern
   C++ threading library for bthread, enabling much easier concurrent programming with brpc and
   modern C++.
   
   The APIs and semantics of provided classes and functions are identical to their `std`
   counterparts. Starting bthreads with lambdas and functors are not supported. Some existing
   "cpp wrappers" e.g. `Mutex` and `ConditionVariable` are also updated to provide consistent API with
   the C++ standard.
   
   The rationale behind this is that by closely mirroring the C++ standard a good modern C++
   programmer experienced in `std` threading libraries will be able to use the C++ bthread APIs well
   without even needing to learn.
   
   Currently provided features:
   
   | Feature | `std` counterpart | Header | Note |
   | --- | --- | --- | --- |
   | bthread::BThread | std::thread | bthreadxx.h | |
   | bthread::this_bthread | std::this_thread | bthreadxx.h | yield, get_id, sleep_for, sleep_until |
   | bthread::Mutex | std::mutex | mutex.h | Updated to match the standard |
   | bthread::TimedMutex | std::timed_mutex | mutex.h | |
   | bthread::RecursiveMutex | std::recursive_mutex | mutex.h | |
   | bthread::RecursiveTimedMutex | std::recursive_timed_mutex | mutex.h | |
   | bthread::ConditionVariable | std::condition_variable | condition_variable.h | |
   | bthread::ConditionVariableAny | std::condition_variable_any | condition_variable.h | |
   
   To use these features simply include the corresponding headers. For the generic constructs like
   `std::unique_lock`, just use the `std` ones and they work well with things like `bthread::Mutex`.
   
   Other missing featurs like `future`s and `promise`s are planned and I'm working on it.
   

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