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Enforce consistent style
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concurrency-primer.tex

Lines changed: 10 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -318,7 +318,8 @@ \section{Enforcing law and order}
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int v = 0;
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atomic_bool v_ready = false;
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void *threadA() {
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void *threadA()
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{
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v = 42;
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v_ready = true;
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}
@@ -328,7 +329,8 @@ \section{Enforcing law and order}
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\begin{minted}[fontsize=\codesize]{c}
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int bv;
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void *threadB() {
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void *threadB()
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{
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while(!v_ready) { /* wait */ }
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bv = v;
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/* Do something */
@@ -373,7 +375,7 @@ \section{Atomicity}
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just make sure that any variables used for thread synchronization
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are no larger than the \textsc{cpu} word size.
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\section{Arbitrarily-sized atomic types}
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\section{Arbitrarily-sized ``atomic'' types}
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Along with \texttt{atomic\_int} and friends,
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\cplusplus{} provides the template \texttt{std::atomic<T>} for defining arbitrary atomic types.
@@ -398,8 +400,7 @@ \section{Arbitrarily-sized “atomic” types}
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Consequently, \cplusplus{17} added \texttt{is\_always\_lock\_free}:
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\begin{colfigure}
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\begin{minted}[fontsize=\codesize]{cpp}
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static_assert(
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std::atomic<Foo>::is_always_lock_free);
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static_assert(std::atomic<Foo>::is_always_lock_free);
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\end{minted}
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\end{colfigure}
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@@ -453,10 +454,10 @@ \subsection{Test and set}
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void unlock() { atomic_flag_clear(&af); }
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\end{minted}
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\end{colfigure}
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If we call \mintinline{cpp}{lock()} and the previous value is \mintinline{cpp}{false},
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If we call \mintinline{c}{lock()} and the previous value is \mintinline{c}{false},
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we are the first to acquire the lock,
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and can proceed with exclusive access to whatever the lock protects.
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If the previous value is \mintinline{cpp}{true},
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If the previous value is \mintinline{c}{true},
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someone else has acquired the lock and we must wait until they release it by clearing the flag.
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\subsection{Fetch and…}
@@ -636,7 +637,7 @@ \section{Sequential consistency on weakly-ordered hardware}
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\begin{minted}[fontsize=\codesize]{cpp}
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void setFoo(int i)
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{
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foo = i;
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foo = i;
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}
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\end{minted}
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\end{minipage}
@@ -1344,7 +1345,7 @@ \section{Additional Resources}
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\textsc{n}4455}, and as a
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\href{https://www.youtube.com/watch?v=IB57wIf9W1k}{CppCon talk}.
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\href{http://en.cppreference.com}{cppreference.com},
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\href{https://en.cppreference.com}{cppreference.com},
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an excellent reference for the \clang{} and \cplusplus{} memory model and atomic \textsc{api}.
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\href{https://godbolt.org/}{Matt Godbolt's Compiler Explorer},

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