79 lines
2.5 KiB
C++
79 lines
2.5 KiB
C++
// This file is part of AsmJit project <https://asmjit.com>
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//
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// See asmjit.h or LICENSE.md for license and copyright information
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// SPDX-License-Identifier: Zlib
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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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#include "../core/string.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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#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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ASMJIT_INLINE_NODEBUG Lock::Lock() noexcept { InitializeCriticalSection(reinterpret_cast<CRITICAL_SECTION*>(&_handle)); }
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ASMJIT_INLINE_NODEBUG Lock::~Lock() noexcept { DeleteCriticalSection(reinterpret_cast<CRITICAL_SECTION*>(&_handle)); }
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ASMJIT_INLINE_NODEBUG void Lock::lock() noexcept { EnterCriticalSection(reinterpret_cast<CRITICAL_SECTION*>(&_handle)); }
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ASMJIT_INLINE_NODEBUG 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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ASMJIT_INLINE_NODEBUG Lock::Lock() noexcept : _handle(PTHREAD_MUTEX_INITIALIZER) {}
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#else
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ASMJIT_INLINE_NODEBUG Lock::Lock() noexcept { pthread_mutex_init(&_handle, nullptr); }
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#endif
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ASMJIT_INLINE_NODEBUG Lock::~Lock() noexcept { pthread_mutex_destroy(&_handle); }
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ASMJIT_INLINE_NODEBUG void Lock::lock() noexcept { pthread_mutex_lock(&_handle); }
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ASMJIT_INLINE_NODEBUG 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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ASMJIT_INLINE_NODEBUG Lock::Lock() noexcept {}
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ASMJIT_INLINE_NODEBUG Lock::~Lock() noexcept {}
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ASMJIT_INLINE_NODEBUG void Lock::lock() noexcept {}
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ASMJIT_INLINE_NODEBUG void Lock::unlock() noexcept {}
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#endif
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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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ASMJIT_INLINE_NODEBUG LockGuard(Lock& target) noexcept
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: _target(target) { _target.lock(); }
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ASMJIT_INLINE_NODEBUG ~LockGuard() noexcept { _target.unlock(); }
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};
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#if !defined(_WIN32)
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namespace OSUtils {
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//! Reads a file, only used on non-Windows platforms to access /sys or other files when necessary.
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Error readFile(const char* name, String& dst, size_t maxSize) noexcept;
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} // {OSUtils}
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#endif
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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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