(svn r13674) -Fix [FS#2127]: crash when drawing a non-real sprite. The drawing of the non-real sprite is caused when two NewGRFs replace the same sprite and the first replaces it with a real sprite (and thus assumes it remains a real sprite) and the second replaces it with a non-real sprite. OpenTTD already looked at whether the sprite to load should be seen as a real or non-real sprite, but it failed to replace non-real sprites with a substitute real sprite when getting the sprite from the cache.
/* $Id$ */
/** @file thread.h Base of all threads. */
#ifndef THREAD_H
#define THREAD_H
typedef void (*OTTDThreadFunc)(void *);
/**
* A Thread Object which works on all our supported OSes.
*/
class ThreadObject {
public:
/**
* Virtual destructor to allow 'delete' operator to work properly.
*/
virtual ~ThreadObject() {};
/**
* Check if the thread is currently running.
* @return True if the thread is running.
*/
virtual bool IsRunning() = 0;
/**
* Waits for the thread to exit.
* @return True if the thread has exited.
*/
virtual bool WaitForStop() = 0;
/**
* Exit this thread.
*/
virtual bool Exit() = 0;
/**
* Join this thread.
*/
virtual void Join() = 0;
/**
* Check if this thread is the current active thread.
* @return True if it is the current active thread.
*/
virtual bool IsCurrent() = 0;
/**
* Get the unique ID of this thread.
* @return A value unique to each thread.
*/
virtual uint GetId() = 0;
/**
* Create a thread; proc will be called as first function inside the thread,
* with optinal params.
* @param proc The procedure to call inside the thread.
* @param param The params to give with 'proc'.
* @return True if the thread was started correctly.
*/
static ThreadObject *New(OTTDThreadFunc proc, void *param);
/**
* Convert the current thread to a new ThreadObject.
* @return A new ThreadObject with the current thread attached to it.
*/
static ThreadObject *AttachCurrent();
/**
* Find the Id of the current running thread.
* @return The thread ID of the current active thread.
*/
static uint CurrentId();
};
/**
* Cross-platform Thread Semaphore. Wait() waits for a Set() of someone else.
*/
class ThreadSemaphore {
public:
static ThreadSemaphore *New();
/**
* Virtual Destructor to avoid compiler warnings.
*/
virtual ~ThreadSemaphore() {};
/**
* Signal all threads that are in Wait() to continue.
*/
virtual void Set() = 0;
/**
* Wait until we are signaled by a call to Set().
*/
virtual void Wait() = 0;
};
#endif /* THREAD_H */