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45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
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#pragma once
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#include "foundation/types.h"
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#include "nu/lfmpscq.h"
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#include "nu/LockFreeLIFO.h"
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#include <windows.h>
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namespace nu
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{
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/* you can inherit from message_node_t (or combine inside a struct)
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but make sure that your message isn't > 64 bytes */
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struct message_node_t : public queue_node_t
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{
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uint32_t message;
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};
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class MessageLoop
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{
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public:
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MessageLoop();
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~MessageLoop();
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/* API for Message senders */
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message_node_t *AllocateMessage(); // returns a message for you to fill out
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void PostMessage(message_node_t *message);
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/* API for Message receivers */
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void FreeMessage(message_node_t *message);
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message_node_t *GetMessage(); // waits forever
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message_node_t *PeekMessage();
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message_node_t *PeekMessage(unsigned int milliseconds);
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private:
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void RefillCache();
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HANDLE message_notification;
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mpscq_t message_queue;
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/* Memory cache to be able to run APCs without having the memory manager lock
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we'll allocate 100 at a time (#defined by MESSAGE_CACHE_SEED)
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and allocate new ones only if the cache is empty (which unfortunately will lock)
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cache_bases holds the pointers we've allocated (to free on destruction of this object)
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and message_cache holds the individual pointers */
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static lifo_t message_cache;
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static lifo_t cache_bases;
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};
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}
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