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author | Andrei Karas <akaras@inbox.ru> | 2017-07-13 22:28:03 +0300 |
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committer | Andrei Karas <akaras@inbox.ru> | 2017-07-13 22:28:03 +0300 |
commit | f2b51ca5984fc464fbcee652b13c0287752d3c7a (patch) | |
tree | f320495b9c67a92a242bdacb64e84824cb6de996 /src/debug/fast_mutex.h | |
parent | d8a5cfe68b1e3826ea9999396c888e2baae062ad (diff) | |
download | manaverse-f2b51ca5984fc464fbcee652b13c0287752d3c7a.tar.gz manaverse-f2b51ca5984fc464fbcee652b13c0287752d3c7a.tar.bz2 manaverse-f2b51ca5984fc464fbcee652b13c0287752d3c7a.tar.xz manaverse-f2b51ca5984fc464fbcee652b13c0287752d3c7a.zip |
Move memory debug files into nvwa directory.
Diffstat (limited to 'src/debug/fast_mutex.h')
-rw-r--r-- | src/debug/fast_mutex.h | 427 |
1 files changed, 0 insertions, 427 deletions
diff --git a/src/debug/fast_mutex.h b/src/debug/fast_mutex.h deleted file mode 100644 index 39b5fcdc2..000000000 --- a/src/debug/fast_mutex.h +++ /dev/null @@ -1,427 +0,0 @@ -// -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- -// vim:tabstop=4:shiftwidth=4:expandtab: - -/* - * Copyright (C) 2004-2015 Wu Yongwei <adah at users dot sourceforge dot net> - * - * This software is provided 'as-is', without any express or implied - * warranty. In no event will the authors be held liable for any - * damages arising from the use of this software. - * - * Permission is granted to anyone to use this software for any purpose, - * including commercial applications, and to alter it and redistribute - * it freely, subject to the following restrictions: - * - * 1. The origin of this software must not be misrepresented; you must - * not claim that you wrote the original software. If you use this - * software in a product, an acknowledgement in the product - * documentation would be appreciated but is not required. - * 2. Altered source versions must be plainly marked as such, and must - * not be misrepresented as being the original software. - * 3. This notice may not be removed or altered from any source - * distribution. - * - * This file is part of Stones of Nvwa: - * http://sourceforge.net/projects/nvwa - * - */ - -/** - * @file fast_mutex.h - * - * A fast mutex implementation for POSIX, Win32, and modern C++. - * - * @date 2015-05-19 - */ - -#ifndef NVWA_FAST_MUTEX_H -#define NVWA_FAST_MUTEX_H - -#include "debug/_nvwa.h" // NVWA_NAMESPACE_* -#include "debug/c++11.h" // HAVE_CXX11_MUTEX - -# if !defined(_NOTHREADS) -# if !defined(NVWA_USE_CXX11_MUTEX) && HAVE_CXX11_MUTEX != 0 && \ - !defined(_WIN32THREADS) && !defined(NVWA_WIN32THREADS) && \ - !defined(NVWA_PTHREADS) && !defined(NVWA_NOTHREADS) && \ - defined(_WIN32) && defined(_MT) && \ - (!defined(_MSC_VER) || defined(_DLL)) -// Prefer using std::mutex on Windows to avoid the namespace -// pollution caused by <windows.h>. However, MSVC has a re-entry -// issue with its std::mutex implementation, and std::mutex should -// not be used unless /MD or /MDd is used. For more information, -// check out: -// -// https://connect.microsoft.com/VisualStudio/feedback/details/776596/std-mutex-not-a-constexpr-with-mtd-compiler-flag -// http://stackoverflow.com/questions/14319344/stdmutex-lock-hangs-when-overriding-the-new-operator -// -# define NVWA_USE_CXX11_MUTEX 1 -# endif - -# if !defined(_WIN32THREADS) && \ - (defined(_WIN32) && defined(_MT)) -// Automatically use _WIN32THREADS when specifying -MT/-MD in MSVC, -// or -mthreads in MinGW GCC. -# define _WIN32THREADS -# elif !defined(_PTHREADS) && \ - defined(_REENTRANT) -// Automatically use _PTHREADS when specifying -pthread in GCC or Clang. -# define _PTHREADS -# endif -# endif - -# ifndef NVWA_USE_CXX11_MUTEX -# if HAVE_CXX11_MUTEX != 0 && \ - !defined(_NOTHREADS) && !defined(NVWA_NOTHREADS) && \ - !defined(_PTHREADS) && !defined(NVWA_PTHREADS) && \ - !defined(_WIN32THREADS) && !defined(NVWA_WIN32THREADS) -# define NVWA_USE_CXX11_MUTEX 1 -# else -# define NVWA_USE_CXX11_MUTEX 0 -# endif -# endif - -# if !defined(_PTHREADS) && !defined(_WIN32THREADS) && \ - !defined(_NOTHREADS) && NVWA_USE_CXX11_MUTEX == 0 -# define _NOTHREADS -# endif - -# if defined(_NOTHREADS) -# if defined(_PTHREADS) || defined(_WIN32THREADS) || \ - NVWA_USE_CXX11_MUTEX != 0 -# undef _NOTHREADS -# error "Cannot define multi-threaded mode with -D_NOTHREADS" -# endif -# endif - -# if defined(__MINGW32__) && defined(_WIN32THREADS) && !defined(_MT) -# error "Be sure to specify -mthreads with -D_WIN32THREADS" -# endif - -// With all the heuristics above, things may still go wrong, maybe even -// due to a specific inclusion order. So they may be overridden by -// manually defining the NVWA_* macros below. -# if NVWA_USE_CXX11_MUTEX == 0 && \ - !defined(NVWA_WIN32THREADS) && \ - !defined(NVWA_PTHREADS) && \ - !defined(NVWA_NOTHREADS) -// _WIN32THREADS takes precedence, as some C++ libraries have _PTHREADS -// defined even on Win32 platforms. -# if defined(_WIN32THREADS) -# define NVWA_WIN32THREADS -# elif defined(_PTHREADS) -# define NVWA_PTHREADS -# else -# define NVWA_NOTHREADS -# endif -# endif - -# ifndef _FAST_MUTEX_CHECK_INITIALIZATION -/** - * Macro to control whether to check for initialization status for each - * lock/unlock operation. Defining it to a non-zero value will enable - * the check, so that the construction/destruction of a static object - * using a static fast_mutex not yet constructed or already destroyed - * will work (with lock/unlock operations ignored). Defining it to zero - * will disable to check. - */ -# define _FAST_MUTEX_CHECK_INITIALIZATION 1 -# endif - -# ifdef _DEBUG -# include <stdio.h> -# include <stdlib.h> -/** Macro for fast_mutex assertions. Real version (for debug mode). */ -# define _FAST_MUTEX_ASSERT(_Expr, _Msg) \ - if (!(_Expr)) { \ - fprintf(stderr, "fast_mutex::%s\n", _Msg); \ - abort(); \ - } -# else -/** Macro for fast_mutex assertions. Fake version (for release mode). */ -# define _FAST_MUTEX_ASSERT(_Expr, _Msg) \ - ((void)0) -# endif - -# if NVWA_USE_CXX11_MUTEX != 0 -# include <mutex> -NVWA_NAMESPACE_BEGIN -/** - * Macro alias to `volatile' semantics. Here it is truly volatile since - * it is in a multi-threaded (C++11) environment. - */ -# define __VOLATILE volatile - /** - * Class for non-reentrant fast mutexes. This is the implementation - * using the C++11 mutex. - */ - class fast_mutex - { - std::mutex _M_mtx_impl; -# if _FAST_MUTEX_CHECK_INITIALIZATION - bool _M_initialized; -# endif -# ifdef _DEBUG - bool _M_locked; -# endif - public: - fast_mutex() -# ifdef _DEBUG - : _M_locked(false) -# endif - { -# if _FAST_MUTEX_CHECK_INITIALIZATION - _M_initialized = true; -# endif - } - ~fast_mutex() - { - _FAST_MUTEX_ASSERT(!_M_locked, "~fast_mutex(): still locked"); -# if _FAST_MUTEX_CHECK_INITIALIZATION - _M_initialized = false; -# endif - } - void lock() - { -# if _FAST_MUTEX_CHECK_INITIALIZATION - if (!_M_initialized) - return; -# endif - _M_mtx_impl.lock(); -# ifdef _DEBUG - _FAST_MUTEX_ASSERT(!_M_locked, "lock(): already locked"); - _M_locked = true; -# endif - } - void unlock() - { -# if _FAST_MUTEX_CHECK_INITIALIZATION - if (!_M_initialized) - return; -# endif -# ifdef _DEBUG - _FAST_MUTEX_ASSERT(_M_locked, "unlock(): not locked"); - _M_locked = false; -# endif - _M_mtx_impl.unlock(); - } - private: - fast_mutex(const fast_mutex&); - fast_mutex& operator=(const fast_mutex&); - }; -NVWA_NAMESPACE_END -# elif defined(NVWA_PTHREADS) -# include <pthread.h> -NVWA_NAMESPACE_BEGIN -/** - * Macro alias to `volatile' semantics. Here it is truly volatile since - * it is in a multi-threaded (POSIX threads) environment. - */ -# define __VOLATILE volatile - /** - * Class for non-reentrant fast mutexes. This is the implementation - * for POSIX threads. - */ - class fast_mutex - { - pthread_mutex_t _M_mtx_impl; -# if _FAST_MUTEX_CHECK_INITIALIZATION - bool _M_initialized; -# endif -# ifdef _DEBUG - bool _M_locked; -# endif - public: - fast_mutex() -# ifdef _DEBUG - : _M_locked(false) -# endif - { - ::pthread_mutex_init(&_M_mtx_impl, _NULLPTR); -# if _FAST_MUTEX_CHECK_INITIALIZATION - _M_initialized = true; -# endif - } - ~fast_mutex() - { - _FAST_MUTEX_ASSERT(!_M_locked, "~fast_mutex(): still locked"); -# if _FAST_MUTEX_CHECK_INITIALIZATION - _M_initialized = false; -# endif - ::pthread_mutex_destroy(&_M_mtx_impl); - } - void lock() - { -# if _FAST_MUTEX_CHECK_INITIALIZATION - if (!_M_initialized) - return; -# endif - ::pthread_mutex_lock(&_M_mtx_impl); -# ifdef _DEBUG - // The following assertion should _always_ be true for a - // real `fast' pthread_mutex. However, this assertion can - // help sometimes, when people forget to use `-lpthread' and - // glibc provides an empty implementation. Having this - // assertion is also more consistent. - _FAST_MUTEX_ASSERT(!_M_locked, "lock(): already locked"); - _M_locked = true; -# endif - } - void unlock() - { -# if _FAST_MUTEX_CHECK_INITIALIZATION - if (!_M_initialized) - return; -# endif -# ifdef _DEBUG - _FAST_MUTEX_ASSERT(_M_locked, "unlock(): not locked"); - _M_locked = false; -# endif - ::pthread_mutex_unlock(&_M_mtx_impl); - } - private: - fast_mutex(const fast_mutex&); - fast_mutex& operator=(const fast_mutex&); - }; -NVWA_NAMESPACE_END -# elif defined(NVWA_WIN32THREADS) -# ifndef WIN32_LEAN_AND_MEAN -# define WIN32_LEAN_AND_MEAN -# endif /* WIN32_LEAN_AND_MEAN */ -# include <windows.h> -NVWA_NAMESPACE_BEGIN -/** - * Macro alias to `volatile' semantics. Here it is truly volatile since - * it is in a multi-threaded (Win32 threads) environment. - */ -# define __VOLATILE volatile - /** - * Class for non-reentrant fast mutexes. This is the implementation - * for Win32 threads. - */ - class fast_mutex - { - CRITICAL_SECTION _M_mtx_impl; -# if _FAST_MUTEX_CHECK_INITIALIZATION - bool _M_initialized; -# endif -# ifdef _DEBUG - bool _M_locked; -# endif - public: - fast_mutex() -# ifdef _DEBUG - : _M_locked(false) -# endif - { - ::InitializeCriticalSection(&_M_mtx_impl); -# if _FAST_MUTEX_CHECK_INITIALIZATION - _M_initialized = true; -# endif - } - ~fast_mutex() - { - _FAST_MUTEX_ASSERT(!_M_locked, "~fast_mutex(): still locked"); -# if _FAST_MUTEX_CHECK_INITIALIZATION - _M_initialized = false; -# endif - ::DeleteCriticalSection(&_M_mtx_impl); - } - void lock() - { -# if _FAST_MUTEX_CHECK_INITIALIZATION - if (!_M_initialized) - return; -# endif - ::EnterCriticalSection(&_M_mtx_impl); -# ifdef _DEBUG - _FAST_MUTEX_ASSERT(!_M_locked, "lock(): already locked"); - _M_locked = true; -# endif - } - void unlock() - { -# if _FAST_MUTEX_CHECK_INITIALIZATION - if (!_M_initialized) - return; -# endif -# ifdef _DEBUG - _FAST_MUTEX_ASSERT(_M_locked, "unlock(): not locked"); - _M_locked = false; -# endif - ::LeaveCriticalSection(&_M_mtx_impl); - } - private: - fast_mutex(const fast_mutex&); - fast_mutex& operator=(const fast_mutex&); - }; -NVWA_NAMESPACE_END -# elif defined(NVWA_NOTHREADS) -NVWA_NAMESPACE_BEGIN -/** - * Macro alias to `volatile' semantics. Here it is not truly volatile - * since it is in a single-threaded environment. - */ -# define __VOLATILE - /** - * Class for non-reentrant fast mutexes. This is the null - * implementation for single-threaded environments. - */ - class fast_mutex - { -# ifdef _DEBUG - bool _M_locked; -# endif - public: - fast_mutex() -# ifdef _DEBUG - : _M_locked(false) -# endif - { - } - ~fast_mutex() - { - _FAST_MUTEX_ASSERT(!_M_locked, "~fast_mutex(): still locked"); - } - void lock() - { -# ifdef _DEBUG - _FAST_MUTEX_ASSERT(!_M_locked, "lock(): already locked"); - _M_locked = true; -# endif - } - void unlock() - { -# ifdef _DEBUG - _FAST_MUTEX_ASSERT(_M_locked, "unlock(): not locked"); - _M_locked = false; -# endif - } - private: - fast_mutex(const fast_mutex&); - fast_mutex& operator=(const fast_mutex&); - }; -NVWA_NAMESPACE_END -# endif // Definition of class fast_mutex - -NVWA_NAMESPACE_BEGIN -/** RAII lock class for fast_mutex. */ -class fast_mutex_autolock -{ - fast_mutex& _M_mtx; -public: - explicit fast_mutex_autolock(fast_mutex& mtx) : _M_mtx(mtx) - { - _M_mtx.lock(); - } - ~fast_mutex_autolock() - { - _M_mtx.unlock(); - } -private: - fast_mutex_autolock(const fast_mutex_autolock&); - fast_mutex_autolock& operator=(const fast_mutex_autolock&); -}; -NVWA_NAMESPACE_END - -#endif // NVWA_FAST_MUTEX_H |