Make and use a semaphore class

1 files changed, 20 insertions, 0 deletions

diff --git a/common/threads.h b/common/threads.h
index a357b494..03a3899c 100644
--- a/common/threads.h
+++ b/common/threads.h
@@ -63,6 +63,26 @@ int alsem_trywait(alsem_t *sem);
 
 #ifdef __cplusplus
 } // extern "C"
+
+namespace al {
+
+class semaphore {
+    alsem_t mSem;
+
+public:
+    semaphore(unsigned int initial=0);
+    semaphore(const semaphore&) = delete;
+    ~semaphore();
+
+    semaphore& operator=(const semaphore&) = delete;
+
+    void post();
+    void wait() noexcept;
+    int trywait() noexcept;
+};
+
+} // namespace al
+
 #endif
 
 #endif /* AL_THREADS_H */