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/*************************************************
* Mutex Source File *
* (C) 1999-2006 The Botan Project *
*************************************************/
#include <botan/mutex.h>
namespace Botan {
/*************************************************
* Mutex_Holder Constructor *
*************************************************/
Mutex_Holder::Mutex_Holder(Mutex* m) : mux(m)
{
if(!mux)
throw Invalid_Argument("Mutex_Holder: Argument was NULL");
mux->lock();
}
/*************************************************
* Mutex_Holder Destructor *
*************************************************/
Mutex_Holder::~Mutex_Holder()
{
mux->unlock();
}
/*************************************************
* Default Mutex Factory *
*************************************************/
Mutex* Mutex_Factory::make()
{
class Default_Mutex : public Mutex
{
public:
void lock()
{
if(locked)
throw Internal_Error("Default_Mutex::lock: Mutex is already locked");
locked = true;
}
void unlock()
{
if(!locked)
throw Internal_Error("Default_Mutex::unlock: Mutex is already unlocked");
locked = false;
}
Default_Mutex() { locked = false; }
private:
bool locked;
};
return new Default_Mutex;
}
}
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