lock.cpp

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/* SPDX-License-Identifier: MIT */
#include "ajabase/system/lock.h"
#if defined(AJA_USE_CPLUSPLUS11) && !defined(AJA_BAREMETAL)
    #include <chrono>
#else
    // include the system dependent implementation class
    #if defined(AJA_WINDOWS)
        #include "ajabase/system/windows/lockimpl.h"
    #elif defined(AJA_LINUX)
        #include "ajabase/system/linux/lockimpl.h"
    #elif defined(AJA_MAC)
        #include "ajabase/system/mac/lockimpl.h"
    #elif defined(AJA_BAREMETAL)
        #include "ajabase/system/bm/lockimpl.h"
    #endif
#endif
 
 
AJALock::AJALock(const char* pName)
{
#if defined(AJA_USE_CPLUSPLUS11) && !defined(AJA_BAREMETAL)
    mpMutex = new recursive_timed_mutex;
    if (pName != nullptr)
        name = pName;
#else
    mpImpl = NULL;
    mpImpl = new AJALockImpl(pName);
#endif
}
 
AJALock::AJALock (const AJALock & inLock)
{   //  Copy constructor -- only name is copied...
#if defined(AJA_USE_CPLUSPLUS11) && !defined(AJA_BAREMETAL)
    mpMutex = new recursive_timed_mutex;
    name = inLock.name;
#else
    mpImpl = NULL;
    mpImpl = new AJALockImpl(NULL); //  FOR NOW, NAME NOT COPIED -- TBD:  inLock.mpImpl->mName);
#endif
}
 
AJALock & AJALock::operator = (const AJALock & inLock)
{   //  Assignment operator -- no-op
    (void) inLock;
    return *this;
}
 
 
AJALock::~AJALock()
{
#if defined(AJA_USE_CPLUSPLUS11) && !defined(AJA_BAREMETAL)
    delete mpMutex;
    mpMutex = nullptr;
#else
    if(mpImpl)
        delete mpImpl;
#endif
}
 
// interface to the implementation class
 
AJAStatus
AJALock::Lock(uint32_t timeout)
{
#if defined(AJA_USE_CPLUSPLUS11) && !defined(AJA_BAREMETAL)
    if (timeout != LOCK_TIME_INFINITE)
    {
        bool success = mpMutex->try_lock_for(std::chrono::milliseconds(timeout));
        return success ? AJA_STATUS_SUCCESS : AJA_STATUS_TIMEOUT;
    }
    else
    {
        mpMutex->lock();
        return AJA_STATUS_SUCCESS;
    }
#else
    return mpImpl->Lock(timeout);
#endif
}
 
 
AJAStatus
AJALock::Unlock()
{
#if defined(AJA_USE_CPLUSPLUS11) && !defined(AJA_BAREMETAL)
    mpMutex->unlock();
    return AJA_STATUS_SUCCESS;
#else
    return mpImpl->Unlock();
#endif
}
 
 
AJAAutoLock::AJAAutoLock(AJALock* pLock)
{
    mpLock = pLock;
    if (mpLock)
    {
        mpLock->Lock();
    }
}
 
 
AJAAutoLock::~AJAAutoLock()
{
    if (mpLock)
    {
        mpLock->Unlock();
    }
}