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Kernel: Support lazy sweeping simple GC. v5.0.69

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winlin 2022-09-30 18:33:29 +08:00
parent 4b7d9587f4
commit 927dd473eb
6 changed files with 221 additions and 3 deletions
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46
trunk/src/protocol/srs_protocol_conn.hpp
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@ -10,6 +10,7 @@
#include <srs_core.hpp>
#include <string>
#include <vector>
// The resource managed by ISrsResourceManager.
class ISrsResource
@ -20,6 +21,7 @@ public:
public:
// Get the context id of connection.
virtual const SrsContextId& get_id() = 0;
public:
// The resource description, optional.
virtual std::string desc();
};
@ -46,5 +48,49 @@ public:
virtual std::string remote_ip() = 0;
};
// Lazy-sweep resource, never sweep util all wrappers are freed.
// See https://github.com/ossrs/srs/issues/3176#lazy-sweep
class ISrsLazyResource : public ISrsResource
{
private:
// The reference count of resource, 0 is no wrapper and safe to sweep.
int32_t gc_ref_;
// The creator wrapper, which created this resource. Note that it might be disposed and the pointer is NULL, so be
// careful and make sure to check it before use it.
ISrsResource* gc_creator_wrapper_;
// All available wrappers.
std::vector<ISrsResource*> gc_wrappers_;
public:
ISrsLazyResource();
virtual ~ISrsLazyResource();
public:
// For wrapper to use this resource.
virtual ISrsLazyResource* gc_use(ISrsResource* wrapper);
// For wrapper to dispose this resource.
virtual ISrsLazyResource* gc_dispose(ISrsResource* wrapper);
// The current reference count of resource.
virtual int32_t gc_ref();
public:
// Set the creator wrapper, from which resource clone wrapper.
virtual void gc_set_creator_wrapper(ISrsResource* wrapper);
// Get the first available wrapper. NULL if the creator wrapper disposed.
virtual ISrsResource* gc_creator_wrapper();
// Get the first available wrapper. NULL if all wrappers disposed.
// It should be equal to the gc_creator_wrapper() if creator wrapper not disposed.
virtual ISrsResource* gc_available_wrapper();
};
// The lazy-sweep GC, wait for a long time to dispose resource even when resource is disposable.
// See https://github.com/ossrs/srs/issues/3176#lazy-sweep
class ISrsLazyGc
{
public:
ISrsLazyGc();
virtual ~ISrsLazyGc();
public:
// Remove then free the specified resource.
virtual void remove(ISrsLazyResource* c) = 0;
};
#endif