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95 lines
3.3 KiB
95 lines
3.3 KiB
// AsmJit - Machine code generation for C++
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//
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// * Official AsmJit Home Page: https://asmjit.com
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// * Official Github Repository: https://github.com/asmjit/asmjit
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//
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// Copyright (c) 2008-2020 The AsmJit Authors
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would be
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// appreciated but is not required.
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// 2. Altered source versions must be plainly marked as such, and must not be
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// misrepresented as being the original software.
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// 3. This notice may not be removed or altered from any source distribution.
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#ifndef ASMJIT_CORE_OSUTILS_P_H_INCLUDED
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#define ASMJIT_CORE_OSUTILS_P_H_INCLUDED
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#include "../core/osutils.h"
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ASMJIT_BEGIN_NAMESPACE
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//! \cond INTERNAL
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//! \addtogroup asmjit_utilities
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//! \{
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// ============================================================================
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// [asmjit::Lock]
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// ============================================================================
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#if defined(_WIN32)
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// Windows implementation.
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static_assert(sizeof(Lock::Handle) == sizeof(CRITICAL_SECTION), "asmjit::Lock::Handle layout must match CRITICAL_SECTION");
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static_assert(alignof(Lock::Handle) == alignof(CRITICAL_SECTION), "asmjit::Lock::Handle alignment must match CRITICAL_SECTION");
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inline Lock::Lock() noexcept { InitializeCriticalSection(reinterpret_cast<CRITICAL_SECTION*>(&_handle)); }
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inline Lock::~Lock() noexcept { DeleteCriticalSection(reinterpret_cast<CRITICAL_SECTION*>(&_handle)); }
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inline void Lock::lock() noexcept { EnterCriticalSection(reinterpret_cast<CRITICAL_SECTION*>(&_handle)); }
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inline void Lock::unlock() noexcept { LeaveCriticalSection(reinterpret_cast<CRITICAL_SECTION*>(&_handle)); }
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#elif !defined(__EMSCRIPTEN__)
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// PThread implementation.
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#ifdef PTHREAD_MUTEX_INITIALIZER
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inline Lock::Lock() noexcept : _handle(PTHREAD_MUTEX_INITIALIZER) {}
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#else
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inline Lock::Lock() noexcept { pthread_mutex_init(&_handle, nullptr); }
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#endif
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inline Lock::~Lock() noexcept { pthread_mutex_destroy(&_handle); }
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inline void Lock::lock() noexcept { pthread_mutex_lock(&_handle); }
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inline void Lock::unlock() noexcept { pthread_mutex_unlock(&_handle); }
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#else
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// Dummy implementation - Emscripten or other unsupported platform.
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inline Lock::Lock() noexcept {}
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inline Lock::~Lock() noexcept {}
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inline void Lock::lock() noexcept {}
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inline void Lock::unlock() noexcept {}
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#endif
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// ============================================================================
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// [asmjit::LockGuard]
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// ============================================================================
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//! Scoped lock.
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class LockGuard {
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public:
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ASMJIT_NONCOPYABLE(LockGuard)
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Lock& _target;
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inline LockGuard(Lock& target) noexcept
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: _target(target) { _target.lock(); }
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inline ~LockGuard() noexcept { _target.unlock(); }
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};
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//! \}
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//! \endcond
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ASMJIT_END_NAMESPACE
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#endif // ASMJIT_CORE_OSUTILS_P_H_INCLUDED
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