f5d9bc8ae8
The <condition_variable> header is not small, so <shared_mutex> should not include it unless it actually needs std::condition_variable, which is only the case when we don't have pthread_rwlock_t and the POSIX Timers option. The <shared_mutex> header would be even smaller if we had a header for std::condition_variable (separate from std::condition_variable_any). That's already planned for a future change. And <memory_resource> would be even smaller if it was possible to get std::shared_mutex without std::shared_timed_mutex (which depends on <chrono>). For that to be effective, the synchronized_pool_resource would have to create its own simpler version of std::shared_lock without the timed waiting functions. I have no plans to do that. libstdc++-v3/ChangeLog: * include/std/shared_mutex: Only include <condition_variable> when pthread_rwlock_t and POSIX timers are not available. (__cpp_lib_shared_mutex, __cpp_lib_shared_timed_mutex): Change value to be type 'long'. * include/std/version (__cpp_lib_shared_mutex) (__cpp_lib_shared_timed_mutex): Likewise. |
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