Memory pool vectors (DVector) have been enormously simplified in code, and renamed to PoolVector

1 files changed, 46 insertions, 0 deletions

diff --git a/core/os/rw_lock.h b/core/os/rw_lock.h
new file mode 100644
index 0000000000..c513e6d636
--- /dev/null
+++ b/core/os/rw_lock.h
@@ -0,0 +1,46 @@
+#ifndef RWLOCK_H
+#define RWLOCK_H
+
+#include "error_list.h"
+
+class RWLock {
+protected:
+	static RWLock* (*create_func)();
+
+public:
+
+	virtual void read_lock()=0; ///< Lock the rwlock, block if locked by someone else
+	virtual void read_unlock()=0; ///< Unlock the rwlock, let other threads continue
+	virtual Error read_try_lock()=0; ///< Attempt to lock the rwlock, OK on success, ERROR means it can't lock.
+
+	virtual void write_lock()=0; ///< Lock the rwlock, block if locked by someone else
+	virtual void write_unlock()=0; ///< Unlock the rwlock, let other thwrites continue
+	virtual Error write_try_lock()=0; ///< Attempt to lock the rwlock, OK on success, ERROR means it can't lock.
+
+	static RWLock * create(); ///< Create a rwlock
+
+	virtual ~RWLock();
+};
+
+
+class RWLockRead {
+
+	RWLock *lock;
+public:
+
+	RWLockRead(RWLock* p_lock) { lock=p_lock; if (lock) lock->read_lock(); }
+	~RWLockRead() { if (lock) lock->read_unlock(); }
+
+};
+
+class RWLockWrite {
+
+	RWLock *lock;
+public:
+
+	RWLockWrite(RWLock* p_lock) { lock=p_lock; if (lock) lock->write_lock(); }
+	~RWLockWrite() { if (lock) lock->write_unlock(); }
+
+};
+
+#endif // RWLOCK_H