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Add documentation for the C lock API.

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Matej Mulej 2024-03-12 20:56:56 +01:00
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manual/tracy.tex
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@ -2010,6 +2010,55 @@ However, the validation comes with a performance cost, which you may not want to
There is no explicit support for transient zones (section~\ref{transientzones}) in the C API macros. However, this functionality can be implemented by following instructions outlined in section~\ref{capibindings}.
\subsubsection{Lock markup}
Marking locks in the C API is done with the following macros:
\begin{itemize}
\item \texttt{TracyCLockAnnounce(lock\_ctx)}
\item \texttt{TracyCLockTerminate(lock\_ctx)}
\item \texttt{TracyCLockBeforeLock(lock\_ctx)}
\item \texttt{TracyCLockAfterLock(lock\_ctx)}
\item \texttt{TracyCLockAfterUnlock(lock\_ctx)}
\item \texttt{TracyCLockAfterTryLock(lock\_ctx, acquired)}
\item \texttt{TracyCLockMark(lock\_ctx)}
\item \texttt{TracyCLockCustomName(lock\_ctx, name, size)}
\end{itemize}
Additionally a lock context has to be defined next to the lock that they will be marking:
\begin{lstlisting}
TracyCLockCtx tracy_lock_ctx;
HANDLE lock;
\end{lstlisting}
To initialize the lock context use \texttt{TracyCLockAnnounce}, this should be done when the lock you are marking is initialized/created. When the lock is destroyed use \texttt{TracyCLockTerminate}, this will free the lock context. You can use the \texttt{TracyCLockCustomName} macro to name a lock.
You must markup both before and after acquiring a lock:
\begin{lstlisting}
TracyCLockBeforeLock(tracy_lock_ctx);
WaitForSingleObject(lock, INFINITE);
TracyCLockAfterLock(tracy_lock_ctx);
\end{lstlisting}
If acquiring the lock may fail, you should instead use the \texttt{TracyCLockAfterTryLock} macro:
\begin{lstlisting}
TracyCLockBeforeLock(tracy_lock_ctx);
int acquired = WaitForSingleObject(lock, 200) == WAIT_OBJECT_0;
TracyCLockAfterTryLock(tracy_lock_ctx, acquired);
\end{lstlisting}
After you release the lock use the \texttt{TracyCLockAfterUnlock} macro:
\begin{lstlisting}
ReleaseMutex(lock);
TracyCLockAfterUnlock(tracy_lock_ctx);
\end{lstlisting}
You can optionally mark the location of where the lock is held by using the \texttt{TracyCLockMark} macro, this should be done after acquiring the lock.
\subsubsection{Memory profiling}
Use the following macros in your implementations of \texttt{malloc} and \texttt{free}: