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1772622772
``` git grep -lz 'Copyright.txt or https://cmake.org/licensing ' | while IFS= read -r -d $'\0' f ; do sed -i '/Copyright.txt or https:\/\/cmake.org\/licensing / { s/Copyright.txt/LICENSE.rst/ }' "$f" ; done ```
74 lines
1.6 KiB
C++
74 lines
1.6 KiB
C++
// -*-c++-*-
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// vim: set ft=cpp:
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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file LICENSE.rst or https://cmake.org/licensing for details. */
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#pragma once
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#if __cplusplus >= 201402L || defined(_MSVC_LANG) && _MSVC_LANG >= 201402L
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# define CMake_HAVE_CXX_SHARED_LOCK
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#endif
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#if __cplusplus >= 201703L || defined(_MSVC_LANG) && _MSVC_LANG >= 201703L
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# define CMake_HAVE_CXX_SHARED_MUTEX
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#endif
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#if defined(CMake_HAVE_CXX_SHARED_LOCK)
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# include <shared_mutex> // IWYU pragma: export
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#endif
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#if !defined(CMake_HAVE_CXX_SHARED_MUTEX)
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# include <cm3p/uv.h>
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#endif
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namespace cm {
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#if defined(CMake_HAVE_CXX_SHARED_MUTEX)
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using std::shared_mutex;
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#else
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class shared_mutex
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{
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uv_rwlock_t _M_;
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public:
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using native_handle_type = uv_rwlock_t*;
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shared_mutex() { uv_rwlock_init(&_M_); }
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~shared_mutex() { uv_rwlock_destroy(&_M_); }
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shared_mutex(shared_mutex const&) = delete;
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shared_mutex& operator=(shared_mutex const&) = delete;
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void lock() { uv_rwlock_wrlock(&_M_); }
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bool try_lock() { return uv_rwlock_trywrlock(&_M_) == 0; }
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void unlock() { uv_rwlock_wrunlock(&_M_); }
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void lock_shared() { uv_rwlock_rdlock(&_M_); }
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void unlock_shared() { uv_rwlock_rdunlock(&_M_); }
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native_handle_type native_handle() { return &_M_; }
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};
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#endif
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#if defined(CMake_HAVE_CXX_SHARED_LOCK)
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using std::shared_lock;
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#else
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template <typename T>
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class shared_lock
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{
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T& _mutex;
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public:
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using mutex_type = T;
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shared_lock(T& m)
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: _mutex(m)
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{
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_mutex.lock_shared();
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}
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~shared_lock() { _mutex.unlock_shared(); }
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shared_lock(shared_lock const&) = delete;
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shared_lock& operator=(shared_lock const&) = delete;
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};
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#endif
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}
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