mutex.cpp

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/*
**  Command & Conquer Generals Zero Hour(tm)
**  Copyright 2025 Electronic Arts Inc.
**
**  This program is free software: you can redistribute it and/or modify
**  it under the terms of the GNU General Public License as published by
**  the Free Software Foundation, either version 3 of the License, or
**  (at your option) any later version.
**
**  This program is distributed in the hope that it will be useful,
**  but WITHOUT ANY WARRANTY; without even the implied warranty of
**  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
**  GNU General Public License for more details.
**
**  You should have received a copy of the GNU General Public License
**  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
 
#include "mutex.h"
#include "wwdebug.h"
#include <windows.h>
 
 
// ----------------------------------------------------------------------------
 
MutexClass::MutexClass(const char* name) : handle(NULL), locked(false)
{
    #ifdef _UNIX
        //assert(0);
    #else
        handle=CreateMutex(NULL,false,name);
        WWASSERT(handle);
    #endif
}
 
MutexClass::~MutexClass()
{
    #ifdef _UNIX
        //assert(0);
    #else
        WWASSERT(!locked); // Can't delete locked mutex!
        CloseHandle(handle);
    #endif
}
 
bool MutexClass::Lock(int time)
{
    #ifdef _UNIX
        //assert(0);
        return true;
    #else
        int res = WaitForSingleObject(handle,time==WAIT_INFINITE ? INFINITE : time);
        if (res!=WAIT_OBJECT_0) return false;
        locked++;
        return true;
    #endif
}
 
void MutexClass::Unlock()
{
    #ifdef _UNIX
        //assert(0);
    #else
        WWASSERT(locked);
        locked--;
        int res=ReleaseMutex(handle);
        res;    // silence compiler warnings
        WWASSERT(res);
    #endif
}
 
// ----------------------------------------------------------------------------
 
MutexClass::LockClass::LockClass(MutexClass& mutex_,int time) : mutex(mutex_)
{
    failed=!mutex.Lock(time);
}
 
MutexClass::LockClass::~LockClass()
{
    if (!failed) mutex.Unlock();
}
 
 
 
 
 
 
 
// ----------------------------------------------------------------------------
 
CriticalSectionClass::CriticalSectionClass() : handle(NULL), locked(false)
{
    #ifdef _UNIX
        //assert(0);
    #else
        handle=W3DNEWARRAY char[sizeof(CRITICAL_SECTION)];
        InitializeCriticalSection((CRITICAL_SECTION*)handle);
    #endif
}
 
CriticalSectionClass::~CriticalSectionClass()
{
    #ifdef _UNIX
        //assert(0);
    #else
        WWASSERT(!locked); // Can't delete locked mutex!
        DeleteCriticalSection((CRITICAL_SECTION*)handle);
        delete[] handle;
    #endif
}
 
void CriticalSectionClass::Lock()
{
    #ifdef _UNIX
        //assert(0);
    #else
        EnterCriticalSection((CRITICAL_SECTION*)handle);
        locked++;
    #endif
}
 
void CriticalSectionClass::Unlock()
{
    #ifdef _UNIX
        //assert(0);
    #else
        WWASSERT(locked);
        locked--;
        LeaveCriticalSection((CRITICAL_SECTION*)handle);
    #endif
}
 
// ----------------------------------------------------------------------------
 
CriticalSectionClass::LockClass::LockClass(CriticalSectionClass& critical_section) : CriticalSection(critical_section)
{
    CriticalSection.Lock();
}
 
CriticalSectionClass::LockClass::~LockClass()
{
    CriticalSection.Unlock();
}