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Wsrep TLS service

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This commit defines a TLS service interface. If the implementation is
provided by the application when the provider is loaded, appropriate
hooks are probed from the provider and the provider side hooks are
initialized after the provider is loaded.

A sample implementation to demostrate the use of TLS interface
is provided in dbsim/db_tls.cpp.

Also contains a change to thread service interface: The
thread exit virtual method was changed to function pointer
to allow thread exit path which does not involve C++.
This commit is contained in:
Teemu Ollakka
2020-06-26 15:28:25 +03:00
parent a12b814270
commit 9318a50d18
20 changed files with 1193 additions and 79 deletions
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25
include/wsrep/thread_service.hpp
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@ -28,6 +28,9 @@
* condition variables.
*/
#ifndef WSREP_THREAD_SERVICE_HPP
#define WSREP_THREAD_SERVICE_HPP
#include <cstddef> // size_t
#include "compiler.hpp"
@ -41,13 +44,14 @@ namespace wsrep
{
public:
thread_service() : exit() { }
virtual ~thread_service() { }
class thread_key { };
class thread { };
class mutex_key { };
class mutex { };
class cond_key { };
class cond { };
struct thread_key { };
struct thread { };
struct mutex_key { };
struct mutex { };
struct cond_key { };
struct cond { };
/**
* Method will be called before library side thread
@ -69,7 +73,12 @@ namespace wsrep
= 0;
virtual int detach(thread*) WSREP_NOEXCEPT = 0;
virtual int equal(thread*, thread*) WSREP_NOEXCEPT = 0;
WSREP_NORETURN virtual void exit(thread*, void* retval) WSREP_NOEXCEPT = 0;
/*
* This unlike others is a function pointer to
* avoid having C++ methods on thread exit codepath.
*/
WSREP_NORETURN void (*exit)(thread*, void* retval);
virtual int join(thread*, void** retval) WSREP_NOEXCEPT = 0;
virtual thread* self() WSREP_NOEXCEPT = 0;
virtual int setschedparam(thread*, int,
@ -98,3 +107,5 @@ namespace wsrep
virtual int broadcast(cond*) WSREP_NOEXCEPT = 0;
};
} // namespace wsrep
#endif // WSREP_THREAD_SERVICE_HPP